/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 17:44:25,065 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 17:44:25,066 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 17:44:25,094 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 17:44:25,101 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 17:44:25,101 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 17:44:25,102 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 17:44:25,103 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 17:44:25,103 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 17:44:25,109 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 17:44:25,110 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 17:44:25,111 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 17:44:25,112 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 17:44:25,113 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 17:44:25,114 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 17:44:25,115 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 17:44:25,116 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 17:44:25,121 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 17:44:25,122 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 17:44:25,122 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 17:44:25,125 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 17:44:25,143 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 17:44:25,143 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 17:44:25,144 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 17:44:25,144 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 17:44:25,144 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 17:44:25,144 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 17:44:25,144 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 17:44:25,145 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 17:44:25,145 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 17:44:25,146 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 17:44:25,146 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:44:25,146 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 17:44:25,146 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 17:44:25,146 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 17:44:25,146 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 17:44:25,146 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 17:44:25,363 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 17:44:25,386 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 17:44:25,388 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 17:44:25,388 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 17:44:25,390 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 17:44:25,390 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2022-01-31 17:44:25,469 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3589b8c8/06ceb4a20810417da8e84adae412c663/FLAG8254a1d80 [2022-01-31 17:44:25,839 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 17:44:25,840 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i [2022-01-31 17:44:25,848 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3589b8c8/06ceb4a20810417da8e84adae412c663/FLAG8254a1d80 [2022-01-31 17:44:25,860 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/c3589b8c8/06ceb4a20810417da8e84adae412c663 [2022-01-31 17:44:25,862 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 17:44:25,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 17:44:25,867 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 17:44:25,867 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 17:44:25,869 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 17:44:25,870 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:44:25" (1/1) ... [2022-01-31 17:44:25,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e0be244 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:25, skipping insertion in model container [2022-01-31 17:44:25,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 05:44:25" (1/1) ... [2022-01-31 17:44:25,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 17:44:25,890 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 17:44:26,002 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i[816,829] [2022-01-31 17:44:26,019 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:44:26,029 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 17:44:26,050 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-examples/standard_init8_ground-1.i[816,829] [2022-01-31 17:44:26,057 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 17:44:26,066 INFO L208 MainTranslator]: Completed translation [2022-01-31 17:44:26,075 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26 WrapperNode [2022-01-31 17:44:26,075 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 17:44:26,076 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 17:44:26,076 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 17:44:26,076 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 17:44:26,085 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,085 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,090 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,092 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,097 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,101 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,102 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,103 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 17:44:26,104 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 17:44:26,104 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 17:44:26,104 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 17:44:26,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (1/1) ... [2022-01-31 17:44:26,109 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 17:44:26,118 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 17:44:26,127 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-01-31 17:44:26,133 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-01-31 17:44:26,152 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 17:44:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 17:44:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 17:44:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 17:44:26,153 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 17:44:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 17:44:26,153 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 17:44:26,154 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 17:44:26,200 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 17:44:26,201 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 17:44:26,304 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 17:44:26,307 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 17:44:26,308 INFO L299 CfgBuilder]: Removed 9 assume(true) statements. [2022-01-31 17:44:26,309 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:44:26 BoogieIcfgContainer [2022-01-31 17:44:26,309 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 17:44:26,310 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 17:44:26,310 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 17:44:26,312 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 17:44:26,312 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 05:44:25" (1/3) ... [2022-01-31 17:44:26,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d70dd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:44:26, skipping insertion in model container [2022-01-31 17:44:26,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 05:44:26" (2/3) ... [2022-01-31 17:44:26,313 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7d70dd7a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 05:44:26, skipping insertion in model container [2022-01-31 17:44:26,313 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 05:44:26" (3/3) ... [2022-01-31 17:44:26,314 INFO L111 eAbstractionObserver]: Analyzing ICFG standard_init8_ground-1.i [2022-01-31 17:44:26,317 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 17:44:26,317 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 17:44:26,355 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 17:44:26,360 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-01-31 17:44:26,360 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 17:44:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 17:44:26,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:44:26,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:26,385 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:26,385 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:26,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:26,388 INFO L85 PathProgramCache]: Analyzing trace with hash 605594039, now seen corresponding path program 1 times [2022-01-31 17:44:26,393 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:26,393 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656270690] [2022-01-31 17:44:26,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:26,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:26,435 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:26,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:26,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:26,578 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:26,579 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656270690] [2022-01-31 17:44:26,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656270690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:26,580 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:26,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 17:44:26,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280829967] [2022-01-31 17:44:26,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:26,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 17:44:26,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:26,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 17:44:26,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:44:26,603 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.6896551724137931) internal successors, (49), 30 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:26,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:26,661 INFO L93 Difference]: Finished difference Result 67 states and 102 transitions. [2022-01-31 17:44:26,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 17:44:26,664 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:44:26,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:26,669 INFO L225 Difference]: With dead ends: 67 [2022-01-31 17:44:26,669 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 17:44:26,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 17:44:26,673 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 36 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:26,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 47 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 17:44:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 17:44:26,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-01-31 17:44:26,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.3461538461538463) internal successors, (35), 26 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:26,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 40 transitions. [2022-01-31 17:44:26,706 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 40 transitions. Word has length 27 [2022-01-31 17:44:26,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:26,707 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 40 transitions. [2022-01-31 17:44:26,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 7.666666666666667) internal successors, (23), 2 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:26,707 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 40 transitions. [2022-01-31 17:44:26,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 17:44:26,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:26,708 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:26,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 17:44:26,709 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:26,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:26,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1292911787, now seen corresponding path program 1 times [2022-01-31 17:44:26,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:26,710 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [606501930] [2022-01-31 17:44:26,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:26,711 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:26,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:26,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:26,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,760 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 17:44:26,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:26,761 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [606501930] [2022-01-31 17:44:26,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [606501930] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:26,761 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:26,761 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 17:44:26,761 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733550886] [2022-01-31 17:44:26,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:26,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 17:44:26,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:26,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 17:44:26,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 17:44:26,763 INFO L87 Difference]: Start difference. First operand 32 states and 40 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:26,863 INFO L93 Difference]: Finished difference Result 65 states and 88 transitions. [2022-01-31 17:44:26,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-01-31 17:44:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 17:44:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:26,866 INFO L225 Difference]: With dead ends: 65 [2022-01-31 17:44:26,866 INFO L226 Difference]: Without dead ends: 40 [2022-01-31 17:44:26,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:44:26,870 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 61 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:26,870 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 61 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:26,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-01-31 17:44:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-01-31 17:44:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:26,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-31 17:44:26,877 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 27 [2022-01-31 17:44:26,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:26,877 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-31 17:44:26,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:26,878 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-31 17:44:26,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 17:44:26,878 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:26,878 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:26,879 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 17:44:26,879 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:26,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:26,892 INFO L85 PathProgramCache]: Analyzing trace with hash -1348929241, now seen corresponding path program 1 times [2022-01-31 17:44:26,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:26,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935068037] [2022-01-31 17:44:26,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:26,903 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:26,903 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:26,903 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:26,905 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:26,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:26,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:26,983 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 17:44:26,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:26,983 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935068037] [2022-01-31 17:44:26,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935068037] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:26,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:26,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 17:44:26,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818084517] [2022-01-31 17:44:26,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:26,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 17:44:26,985 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:26,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 17:44:26,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 17:44:26,985 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:27,168 INFO L93 Difference]: Finished difference Result 80 states and 103 transitions. [2022-01-31 17:44:27,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 17:44:27,169 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 17:44:27,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:27,169 INFO L225 Difference]: With dead ends: 80 [2022-01-31 17:44:27,169 INFO L226 Difference]: Without dead ends: 48 [2022-01-31 17:44:27,170 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:44:27,171 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 104 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:27,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 104 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:27,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-01-31 17:44:27,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2022-01-31 17:44:27,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2142857142857142) internal successors, (51), 42 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:27,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 56 transitions. [2022-01-31 17:44:27,186 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 56 transitions. Word has length 35 [2022-01-31 17:44:27,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:27,187 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 56 transitions. [2022-01-31 17:44:27,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.2) internal successors, (31), 4 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,187 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 56 transitions. [2022-01-31 17:44:27,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 17:44:27,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:27,196 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:27,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 17:44:27,196 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:27,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:27,196 INFO L85 PathProgramCache]: Analyzing trace with hash -46684373, now seen corresponding path program 2 times [2022-01-31 17:44:27,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:27,197 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875676444] [2022-01-31 17:44:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:27,208 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:27,208 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:27,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:27,210 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:27,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:27,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,333 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 17:44:27,334 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:27,334 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875676444] [2022-01-31 17:44:27,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875676444] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:27,334 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:27,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 17:44:27,334 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140824490] [2022-01-31 17:44:27,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:27,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 17:44:27,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:27,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 17:44:27,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 17:44:27,335 INFO L87 Difference]: Start difference. First operand 48 states and 56 transitions. Second operand has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:27,438 INFO L93 Difference]: Finished difference Result 95 states and 118 transitions. [2022-01-31 17:44:27,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 17:44:27,439 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 17:44:27,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:27,439 INFO L225 Difference]: With dead ends: 95 [2022-01-31 17:44:27,439 INFO L226 Difference]: Without dead ends: 56 [2022-01-31 17:44:27,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:44:27,441 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 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 17:44:27,441 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-01-31 17:44:27,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2022-01-31 17:44:27,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.18) internal successors, (59), 50 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 64 transitions. [2022-01-31 17:44:27,448 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 64 transitions. Word has length 43 [2022-01-31 17:44:27,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:27,448 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 64 transitions. [2022-01-31 17:44:27,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.333333333333333) internal successors, (32), 5 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,449 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 64 transitions. [2022-01-31 17:44:27,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 17:44:27,449 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:27,449 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:27,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 17:44:27,450 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:27,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:27,450 INFO L85 PathProgramCache]: Analyzing trace with hash -663220313, now seen corresponding path program 3 times [2022-01-31 17:44:27,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:27,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012479182] [2022-01-31 17:44:27,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:27,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:27,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:27,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:27,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:27,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:27,554 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:27,554 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012479182] [2022-01-31 17:44:27,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012479182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:27,554 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:27,554 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 17:44:27,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095100423] [2022-01-31 17:44:27,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:27,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 17:44:27,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:27,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 17:44:27,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 17:44:27,556 INFO L87 Difference]: Start difference. First operand 56 states and 64 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:27,671 INFO L93 Difference]: Finished difference Result 110 states and 133 transitions. [2022-01-31 17:44:27,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 17:44:27,671 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 17:44:27,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:27,672 INFO L225 Difference]: With dead ends: 110 [2022-01-31 17:44:27,672 INFO L226 Difference]: Without dead ends: 64 [2022-01-31 17:44:27,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=65, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:44:27,673 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 80 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 80 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:27,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 80 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:27,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2022-01-31 17:44:27,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2022-01-31 17:44:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.1551724137931034) internal successors, (67), 58 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:27,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2022-01-31 17:44:27,680 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 51 [2022-01-31 17:44:27,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:27,680 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2022-01-31 17:44:27,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 6 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,681 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2022-01-31 17:44:27,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 17:44:27,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:27,681 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:27,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 17:44:27,682 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:27,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:27,682 INFO L85 PathProgramCache]: Analyzing trace with hash -414881365, now seen corresponding path program 4 times [2022-01-31 17:44:27,682 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:27,682 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [681071237] [2022-01-31 17:44:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:27,684 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:27,684 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:27,684 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:27,685 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:27,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:27,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:27,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:27,766 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [681071237] [2022-01-31 17:44:27,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [681071237] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:27,766 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:27,766 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 17:44:27,766 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590377688] [2022-01-31 17:44:27,766 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:27,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 17:44:27,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:27,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 17:44:27,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 17:44:27,768 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:27,912 INFO L93 Difference]: Finished difference Result 125 states and 148 transitions. [2022-01-31 17:44:27,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 17:44:27,913 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 17:44:27,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:27,913 INFO L225 Difference]: With dead ends: 125 [2022-01-31 17:44:27,913 INFO L226 Difference]: Without dead ends: 72 [2022-01-31 17:44:27,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=93, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:44:27,914 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 126 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 126 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:27,915 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 126 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:27,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-01-31 17:44:27,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2022-01-31 17:44:27,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.1363636363636365) internal successors, (75), 66 states have internal predecessors, (75), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:27,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 80 transitions. [2022-01-31 17:44:27,921 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 80 transitions. Word has length 59 [2022-01-31 17:44:27,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:27,921 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 80 transitions. [2022-01-31 17:44:27,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.25) internal successors, (34), 7 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:27,922 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 80 transitions. [2022-01-31 17:44:27,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 17:44:27,922 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:27,922 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:27,922 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 17:44:27,922 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:27,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:27,923 INFO L85 PathProgramCache]: Analyzing trace with hash -1048295897, now seen corresponding path program 5 times [2022-01-31 17:44:27,923 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:27,923 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2115784182] [2022-01-31 17:44:27,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:27,924 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:27,924 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:27,924 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:27,925 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:27,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,012 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 17:44:28,012 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:28,013 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2115784182] [2022-01-31 17:44:28,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2115784182] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:28,013 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:28,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 17:44:28,013 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829868871] [2022-01-31 17:44:28,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:28,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 17:44:28,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:28,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 17:44:28,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 17:44:28,014 INFO L87 Difference]: Start difference. First operand 72 states and 80 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:28,182 INFO L93 Difference]: Finished difference Result 140 states and 163 transitions. [2022-01-31 17:44:28,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 17:44:28,182 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 17:44:28,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:28,183 INFO L225 Difference]: With dead ends: 140 [2022-01-31 17:44:28,183 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 17:44:28,184 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=126, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:44:28,184 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 96 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 96 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:28,184 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 96 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:28,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 17:44:28,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-01-31 17:44:28,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.1216216216216217) internal successors, (83), 74 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:28,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 88 transitions. [2022-01-31 17:44:28,190 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 88 transitions. Word has length 67 [2022-01-31 17:44:28,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:28,191 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 88 transitions. [2022-01-31 17:44:28,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,191 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 88 transitions. [2022-01-31 17:44:28,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 17:44:28,215 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:28,215 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:28,215 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 17:44:28,215 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:28,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:28,215 INFO L85 PathProgramCache]: Analyzing trace with hash 639208491, now seen corresponding path program 6 times [2022-01-31 17:44:28,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:28,216 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [621512678] [2022-01-31 17:44:28,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:28,217 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:28,217 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:28,217 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:28,218 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:28,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:28,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:28,302 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:28,302 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [621512678] [2022-01-31 17:44:28,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [621512678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:28,302 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:28,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 17:44:28,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12606422] [2022-01-31 17:44:28,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:28,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 17:44:28,303 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:28,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 17:44:28,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 17:44:28,304 INFO L87 Difference]: Start difference. First operand 80 states and 88 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:28,491 INFO L93 Difference]: Finished difference Result 155 states and 178 transitions. [2022-01-31 17:44:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 17:44:28,492 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 17:44:28,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:28,492 INFO L225 Difference]: With dead ends: 155 [2022-01-31 17:44:28,492 INFO L226 Difference]: Without dead ends: 88 [2022-01-31 17:44:28,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=164, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:44:28,494 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:28,494 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-01-31 17:44:28,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-01-31 17:44:28,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.1097560975609757) internal successors, (91), 82 states have internal predecessors, (91), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-01-31 17:44:28,501 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 75 [2022-01-31 17:44:28,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:28,501 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-01-31 17:44:28,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,502 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-01-31 17:44:28,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 17:44:28,503 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:28,503 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:28,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 17:44:28,503 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:28,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:28,503 INFO L85 PathProgramCache]: Analyzing trace with hash 710778023, now seen corresponding path program 7 times [2022-01-31 17:44:28,503 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:28,504 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271103719] [2022-01-31 17:44:28,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:28,505 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:28,505 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:28,505 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:28,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:28,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:28,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:28,593 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:28,594 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271103719] [2022-01-31 17:44:28,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271103719] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:28,594 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:28,594 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 17:44:28,594 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972428762] [2022-01-31 17:44:28,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:28,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 17:44:28,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:28,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 17:44:28,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 17:44:28,595 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:28,804 INFO L93 Difference]: Finished difference Result 170 states and 193 transitions. [2022-01-31 17:44:28,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 17:44:28,805 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 17:44:28,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:28,805 INFO L225 Difference]: With dead ends: 170 [2022-01-31 17:44:28,805 INFO L226 Difference]: Without dead ends: 96 [2022-01-31 17:44:28,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=207, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:44:28,806 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 331 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:28,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 331 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:28,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-01-31 17:44:28,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2022-01-31 17:44:28,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.1) internal successors, (99), 90 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:28,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 104 transitions. [2022-01-31 17:44:28,812 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 104 transitions. Word has length 83 [2022-01-31 17:44:28,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:28,812 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 104 transitions. [2022-01-31 17:44:28,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 10 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:28,813 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 104 transitions. [2022-01-31 17:44:28,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 17:44:28,813 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:28,813 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:28,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 17:44:28,814 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:28,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:28,814 INFO L85 PathProgramCache]: Analyzing trace with hash -694939989, now seen corresponding path program 8 times [2022-01-31 17:44:28,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:28,814 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1239403171] [2022-01-31 17:44:28,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:28,815 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:28,815 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:28,816 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:28,817 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:28,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:28,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:28,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1239403171] [2022-01-31 17:44:28,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1239403171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:28,914 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:28,914 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 17:44:28,914 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759219322] [2022-01-31 17:44:28,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:28,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 17:44:28,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:28,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 17:44:28,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 17:44:28,915 INFO L87 Difference]: Start difference. First operand 96 states and 104 transitions. Second operand has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:29,132 INFO L93 Difference]: Finished difference Result 185 states and 208 transitions. [2022-01-31 17:44:29,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 17:44:29,133 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 17:44:29,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:29,133 INFO L225 Difference]: With dead ends: 185 [2022-01-31 17:44:29,133 INFO L226 Difference]: Without dead ends: 104 [2022-01-31 17:44:29,134 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=165, Invalid=255, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:44:29,134 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 139 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 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 17:44:29,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 356 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 139 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:29,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-01-31 17:44:29,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2022-01-31 17:44:29,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.0918367346938775) internal successors, (107), 98 states have internal predecessors, (107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:29,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 112 transitions. [2022-01-31 17:44:29,142 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 112 transitions. Word has length 91 [2022-01-31 17:44:29,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:29,142 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 112 transitions. [2022-01-31 17:44:29,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.1666666666666665) internal successors, (38), 11 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,143 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 112 transitions. [2022-01-31 17:44:29,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 17:44:29,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:29,144 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:29,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 17:44:29,144 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:29,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:29,144 INFO L85 PathProgramCache]: Analyzing trace with hash -257682649, now seen corresponding path program 9 times [2022-01-31 17:44:29,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:29,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1226082371] [2022-01-31 17:44:29,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:29,145 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:29,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:29,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:29,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:29,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:29,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:29,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:29,266 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:29,266 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:29,267 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1226082371] [2022-01-31 17:44:29,267 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1226082371] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:29,267 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:29,267 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 17:44:29,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038137760] [2022-01-31 17:44:29,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:29,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 17:44:29,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:29,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 17:44:29,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 17:44:29,268 INFO L87 Difference]: Start difference. First operand 104 states and 112 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:29,502 INFO L93 Difference]: Finished difference Result 200 states and 223 transitions. [2022-01-31 17:44:29,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 17:44:29,502 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 17:44:29,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:29,503 INFO L225 Difference]: With dead ends: 200 [2022-01-31 17:44:29,503 INFO L226 Difference]: Without dead ends: 112 [2022-01-31 17:44:29,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=198, Invalid=308, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:44:29,504 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 147 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 385 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 147 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:29,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 385 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 147 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 17:44:29,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2022-01-31 17:44:29,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 112. [2022-01-31 17:44:29,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.0849056603773586) internal successors, (115), 106 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:29,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 120 transitions. [2022-01-31 17:44:29,509 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 120 transitions. Word has length 99 [2022-01-31 17:44:29,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:29,510 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 120 transitions. [2022-01-31 17:44:29,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 12 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,510 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 120 transitions. [2022-01-31 17:44:29,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 17:44:29,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:29,511 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:29,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 17:44:29,511 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:29,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:29,511 INFO L85 PathProgramCache]: Analyzing trace with hash 395637035, now seen corresponding path program 10 times [2022-01-31 17:44:29,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:29,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185828925] [2022-01-31 17:44:29,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:29,512 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:29,513 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:29,513 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:29,514 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:29,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:29,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:29,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:29,640 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 17:44:29,640 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:29,640 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185828925] [2022-01-31 17:44:29,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185828925] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:29,640 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:29,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 17:44:29,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [446452849] [2022-01-31 17:44:29,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:29,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 17:44:29,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:29,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 17:44:29,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 17:44:29,641 INFO L87 Difference]: Start difference. First operand 112 states and 120 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:29,899 INFO L93 Difference]: Finished difference Result 215 states and 238 transitions. [2022-01-31 17:44:29,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 17:44:29,899 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 17:44:29,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:29,900 INFO L225 Difference]: With dead ends: 215 [2022-01-31 17:44:29,900 INFO L226 Difference]: Without dead ends: 120 [2022-01-31 17:44:29,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=234, Invalid=366, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:44:29,901 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 225 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 418 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 225 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:29,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 418 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [225 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:29,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-01-31 17:44:29,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-01-31 17:44:29,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.0789473684210527) internal successors, (123), 114 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:29,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 128 transitions. [2022-01-31 17:44:29,906 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 128 transitions. Word has length 107 [2022-01-31 17:44:29,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:29,906 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 128 transitions. [2022-01-31 17:44:29,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:29,906 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 128 transitions. [2022-01-31 17:44:29,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 17:44:29,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:29,907 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:29,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 17:44:29,907 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:29,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:29,907 INFO L85 PathProgramCache]: Analyzing trace with hash 267889063, now seen corresponding path program 11 times [2022-01-31 17:44:29,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:29,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [801681796] [2022-01-31 17:44:29,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:29,908 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:29,908 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:29,908 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:29,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:30,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,041 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 17:44:30,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:30,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [801681796] [2022-01-31 17:44:30,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [801681796] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:30,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:30,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 17:44:30,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107074210] [2022-01-31 17:44:30,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:30,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 17:44:30,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:30,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 17:44:30,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 17:44:30,043 INFO L87 Difference]: Start difference. First operand 120 states and 128 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:30,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:30,327 INFO L93 Difference]: Finished difference Result 230 states and 253 transitions. [2022-01-31 17:44:30,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 17:44:30,327 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 17:44:30,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:30,328 INFO L225 Difference]: With dead ends: 230 [2022-01-31 17:44:30,328 INFO L226 Difference]: Without dead ends: 128 [2022-01-31 17:44:30,328 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=273, Invalid=429, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:44:30,329 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 144 mSolverCounterSat, 327 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 327 IncrementalHoareTripleChecker+Valid, 144 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:30,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [327 Valid, 144 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:30,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-01-31 17:44:30,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 128. [2022-01-31 17:44:30,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.0737704918032787) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:30,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 136 transitions. [2022-01-31 17:44:30,333 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 136 transitions. Word has length 115 [2022-01-31 17:44:30,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:30,333 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 136 transitions. [2022-01-31 17:44:30,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:30,334 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 136 transitions. [2022-01-31 17:44:30,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 17:44:30,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:30,334 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:30,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 17:44:30,334 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 167523243, now seen corresponding path program 12 times [2022-01-31 17:44:30,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:30,335 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1333495038] [2022-01-31 17:44:30,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:30,336 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:30,336 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:30,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:30,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:30,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:30,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1333495038] [2022-01-31 17:44:30,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1333495038] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:30,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:30,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 17:44:30,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083904807] [2022-01-31 17:44:30,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:30,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 17:44:30,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:30,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 17:44:30,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 17:44:30,478 INFO L87 Difference]: Start difference. First operand 128 states and 136 transitions. Second operand has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:30,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:30,763 INFO L93 Difference]: Finished difference Result 245 states and 268 transitions. [2022-01-31 17:44:30,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 17:44:30,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 17:44:30,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:30,764 INFO L225 Difference]: With dead ends: 245 [2022-01-31 17:44:30,764 INFO L226 Difference]: Without dead ends: 136 [2022-01-31 17:44:30,765 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=315, Invalid=497, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:44:30,765 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 171 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 483 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:30,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 483 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 171 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:30,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-01-31 17:44:30,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 136. [2022-01-31 17:44:30,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.0692307692307692) internal successors, (139), 130 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:30,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 144 transitions. [2022-01-31 17:44:30,770 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 144 transitions. Word has length 123 [2022-01-31 17:44:30,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:30,770 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 144 transitions. [2022-01-31 17:44:30,771 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.625) internal successors, (42), 15 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:30,771 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 144 transitions. [2022-01-31 17:44:30,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 17:44:30,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:30,771 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:30,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 17:44:30,772 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:30,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:30,772 INFO L85 PathProgramCache]: Analyzing trace with hash -1577557977, now seen corresponding path program 13 times [2022-01-31 17:44:30,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:30,772 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1377797502] [2022-01-31 17:44:30,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:30,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:30,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:30,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:30,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:30,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:30,952 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 17:44:30,952 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:30,952 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1377797502] [2022-01-31 17:44:30,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1377797502] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:30,952 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:30,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 17:44:30,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548360766] [2022-01-31 17:44:30,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:30,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 17:44:30,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:30,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 17:44:30,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 17:44:30,954 INFO L87 Difference]: Start difference. First operand 136 states and 144 transitions. Second operand has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:31,262 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2022-01-31 17:44:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 17:44:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 17:44:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:31,263 INFO L225 Difference]: With dead ends: 260 [2022-01-31 17:44:31,263 INFO L226 Difference]: Without dead ends: 144 [2022-01-31 17:44:31,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=360, Invalid=570, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:44:31,264 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 313 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 313 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:31,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [313 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-01-31 17:44:31,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 144. [2022-01-31 17:44:31,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.065217391304348) internal successors, (147), 138 states have internal predecessors, (147), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:31,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 152 transitions. [2022-01-31 17:44:31,291 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 152 transitions. Word has length 131 [2022-01-31 17:44:31,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:31,292 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 152 transitions. [2022-01-31 17:44:31,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.5294117647058822) internal successors, (43), 16 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:31,292 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 152 transitions. [2022-01-31 17:44:31,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 17:44:31,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:31,293 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:31,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 17:44:31,293 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:31,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash -794175957, now seen corresponding path program 14 times [2022-01-31 17:44:31,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:31,293 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117634923] [2022-01-31 17:44:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:31,294 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:31,294 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:31,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:31,296 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:31,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:31,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:31,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:31,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:31,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:31,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117634923] [2022-01-31 17:44:31,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [117634923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:31,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:31,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 17:44:31,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893323659] [2022-01-31 17:44:31,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:31,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 17:44:31,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:31,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 17:44:31,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 17:44:31,500 INFO L87 Difference]: Start difference. First operand 144 states and 152 transitions. Second operand has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:31,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:31,940 INFO L93 Difference]: Finished difference Result 275 states and 298 transitions. [2022-01-31 17:44:31,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 17:44:31,940 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 17:44:31,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:31,941 INFO L225 Difference]: With dead ends: 275 [2022-01-31 17:44:31,941 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 17:44:31,942 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=408, Invalid=648, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:44:31,942 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 187 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:31,942 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 187 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:31,943 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 17:44:31,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 17:44:31,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.0616438356164384) internal successors, (155), 146 states have internal predecessors, (155), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:31,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 160 transitions. [2022-01-31 17:44:31,949 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 160 transitions. Word has length 139 [2022-01-31 17:44:31,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:31,949 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 160 transitions. [2022-01-31 17:44:31,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.4444444444444446) internal successors, (44), 17 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:31,949 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 160 transitions. [2022-01-31 17:44:31,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 17:44:31,950 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:31,950 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:31,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 17:44:31,950 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:31,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:31,950 INFO L85 PathProgramCache]: Analyzing trace with hash -565823833, now seen corresponding path program 15 times [2022-01-31 17:44:31,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:31,950 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233918276] [2022-01-31 17:44:31,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:31,951 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:31,952 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:31,952 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:31,954 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:32,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:32,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:32,181 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 17:44:32,181 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:32,181 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233918276] [2022-01-31 17:44:32,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [233918276] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:32,182 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:32,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 17:44:32,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669519376] [2022-01-31 17:44:32,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:32,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 17:44:32,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:32,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 17:44:32,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 17:44:32,183 INFO L87 Difference]: Start difference. First operand 152 states and 160 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:32,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:32,596 INFO L93 Difference]: Finished difference Result 290 states and 313 transitions. [2022-01-31 17:44:32,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 17:44:32,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 17:44:32,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:32,597 INFO L225 Difference]: With dead ends: 290 [2022-01-31 17:44:32,597 INFO L226 Difference]: Without dead ends: 160 [2022-01-31 17:44:32,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=459, Invalid=731, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:44:32,598 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 606 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 392 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:32,598 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 606 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [392 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:32,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-01-31 17:44:32,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-01-31 17:44:32,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.0584415584415585) internal successors, (163), 154 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:32,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 168 transitions. [2022-01-31 17:44:32,604 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 168 transitions. Word has length 147 [2022-01-31 17:44:32,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:32,604 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 168 transitions. [2022-01-31 17:44:32,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 168 transitions. [2022-01-31 17:44:32,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 17:44:32,605 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:32,605 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:32,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 17:44:32,606 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:32,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:32,606 INFO L85 PathProgramCache]: Analyzing trace with hash -1870800725, now seen corresponding path program 16 times [2022-01-31 17:44:32,606 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:32,606 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [236728863] [2022-01-31 17:44:32,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:32,607 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:32,607 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:32,607 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:32,609 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:32,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:32,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:32,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:32,833 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 17:44:32,833 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:32,833 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [236728863] [2022-01-31 17:44:32,833 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [236728863] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:32,833 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:32,833 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 17:44:32,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636872833] [2022-01-31 17:44:32,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:32,834 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 17:44:32,834 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:32,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 17:44:32,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 17:44:32,834 INFO L87 Difference]: Start difference. First operand 160 states and 168 transitions. Second operand has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:33,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:33,243 INFO L93 Difference]: Finished difference Result 305 states and 328 transitions. [2022-01-31 17:44:33,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 17:44:33,243 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 17:44:33,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:33,244 INFO L225 Difference]: With dead ends: 305 [2022-01-31 17:44:33,244 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 17:44:33,245 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=513, Invalid=819, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:44:33,245 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 203 mSolverCounterSat, 506 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 506 IncrementalHoareTripleChecker+Valid, 203 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:33,245 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [506 Valid, 203 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:33,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 17:44:33,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 168. [2022-01-31 17:44:33,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.0555555555555556) internal successors, (171), 162 states have internal predecessors, (171), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 176 transitions. [2022-01-31 17:44:33,252 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 176 transitions. Word has length 155 [2022-01-31 17:44:33,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:33,252 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 176 transitions. [2022-01-31 17:44:33,252 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.3) internal successors, (46), 19 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:33,252 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 176 transitions. [2022-01-31 17:44:33,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 17:44:33,253 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:33,253 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:33,253 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 17:44:33,253 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:33,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:33,253 INFO L85 PathProgramCache]: Analyzing trace with hash 444673319, now seen corresponding path program 17 times [2022-01-31 17:44:33,253 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:33,253 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352298581] [2022-01-31 17:44:33,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:33,254 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:33,254 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:33,254 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:33,256 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:33,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:33,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:33,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:33,473 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:33,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352298581] [2022-01-31 17:44:33,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1352298581] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:33,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:33,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 17:44:33,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086123886] [2022-01-31 17:44:33,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:33,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 17:44:33,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:33,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 17:44:33,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 17:44:33,474 INFO L87 Difference]: Start difference. First operand 168 states and 176 transitions. Second operand has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:33,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:33,886 INFO L93 Difference]: Finished difference Result 320 states and 343 transitions. [2022-01-31 17:44:33,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 17:44:33,887 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 17:44:33,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:33,887 INFO L225 Difference]: With dead ends: 320 [2022-01-31 17:44:33,887 INFO L226 Difference]: Without dead ends: 176 [2022-01-31 17:44:33,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=570, Invalid=912, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:44:33,888 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 211 mSolverCounterSat, 448 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 448 IncrementalHoareTripleChecker+Valid, 211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:33,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [448 Valid, 211 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:33,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-01-31 17:44:33,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-01-31 17:44:33,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.0529411764705883) internal successors, (179), 170 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:33,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 184 transitions. [2022-01-31 17:44:33,894 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 184 transitions. Word has length 163 [2022-01-31 17:44:33,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:33,894 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 184 transitions. [2022-01-31 17:44:33,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.238095238095238) internal successors, (47), 20 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:33,894 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 184 transitions. [2022-01-31 17:44:33,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 17:44:33,895 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:33,895 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:33,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 17:44:33,896 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:33,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:33,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1884830507, now seen corresponding path program 18 times [2022-01-31 17:44:33,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:33,896 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1649296962] [2022-01-31 17:44:33,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:33,898 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:33,898 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:33,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:33,900 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:34,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:34,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:34,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:34,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:34,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1649296962] [2022-01-31 17:44:34,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1649296962] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:34,149 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:34,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 17:44:34,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810711752] [2022-01-31 17:44:34,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:34,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 17:44:34,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:34,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 17:44:34,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 17:44:34,150 INFO L87 Difference]: Start difference. First operand 176 states and 184 transitions. Second operand has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:34,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:34,627 INFO L93 Difference]: Finished difference Result 335 states and 358 transitions. [2022-01-31 17:44:34,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 17:44:34,628 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 17:44:34,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:34,628 INFO L225 Difference]: With dead ends: 335 [2022-01-31 17:44:34,629 INFO L226 Difference]: Without dead ends: 184 [2022-01-31 17:44:34,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=630, Invalid=1010, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:44:34,630 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 238 mSolverCounterSat, 572 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 572 IncrementalHoareTripleChecker+Valid, 238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:34,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [572 Valid, 238 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:34,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2022-01-31 17:44:34,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 184. [2022-01-31 17:44:34,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.050561797752809) internal successors, (187), 178 states have internal predecessors, (187), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:34,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 192 transitions. [2022-01-31 17:44:34,635 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 192 transitions. Word has length 171 [2022-01-31 17:44:34,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:34,635 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 192 transitions. [2022-01-31 17:44:34,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.1818181818181817) internal successors, (48), 21 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:34,635 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 192 transitions. [2022-01-31 17:44:34,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 17:44:34,636 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:34,636 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:34,637 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 17:44:34,637 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:34,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:34,637 INFO L85 PathProgramCache]: Analyzing trace with hash -901168217, now seen corresponding path program 19 times [2022-01-31 17:44:34,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:34,637 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1530947398] [2022-01-31 17:44:34,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:34,639 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:34,639 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:34,639 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:34,641 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:34,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:34,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:34,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:34,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1530947398] [2022-01-31 17:44:34,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1530947398] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:34,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:34,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 17:44:34,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034453385] [2022-01-31 17:44:34,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:34,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 17:44:34,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:34,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 17:44:34,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 17:44:34,900 INFO L87 Difference]: Start difference. First operand 184 states and 192 transitions. Second operand has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:35,399 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:35,400 INFO L93 Difference]: Finished difference Result 350 states and 373 transitions. [2022-01-31 17:44:35,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 17:44:35,400 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 17:44:35,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:35,401 INFO L225 Difference]: With dead ends: 350 [2022-01-31 17:44:35,401 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 17:44:35,401 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=693, Invalid=1113, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:44:35,402 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 583 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 810 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 583 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:35,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 810 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [583 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:35,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 17:44:35,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2022-01-31 17:44:35,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.0483870967741935) internal successors, (195), 186 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:35,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 200 transitions. [2022-01-31 17:44:35,408 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 200 transitions. Word has length 179 [2022-01-31 17:44:35,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:35,409 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 200 transitions. [2022-01-31 17:44:35,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:35,409 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 200 transitions. [2022-01-31 17:44:35,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 17:44:35,410 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:35,410 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:35,410 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 17:44:35,410 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:35,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:35,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1726415445, now seen corresponding path program 20 times [2022-01-31 17:44:35,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:35,411 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1991095500] [2022-01-31 17:44:35,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:35,412 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:35,412 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:35,412 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:35,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:35,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:35,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:35,676 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 17:44:35,676 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:35,676 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1991095500] [2022-01-31 17:44:35,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1991095500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:35,676 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:35,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 17:44:35,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854557855] [2022-01-31 17:44:35,677 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:35,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 17:44:35,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:35,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 17:44:35,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 17:44:35,677 INFO L87 Difference]: Start difference. First operand 192 states and 200 transitions. Second operand has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:36,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:36,203 INFO L93 Difference]: Finished difference Result 365 states and 388 transitions. [2022-01-31 17:44:36,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 17:44:36,204 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 17:44:36,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:36,204 INFO L225 Difference]: With dead ends: 365 [2022-01-31 17:44:36,204 INFO L226 Difference]: Without dead ends: 200 [2022-01-31 17:44:36,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=759, Invalid=1221, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:44:36,206 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 216 mSolverCounterSat, 571 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 571 IncrementalHoareTripleChecker+Valid, 216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:36,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [571 Valid, 216 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-01-31 17:44:36,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-01-31 17:44:36,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.0463917525773196) internal successors, (203), 194 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:36,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 208 transitions. [2022-01-31 17:44:36,212 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 208 transitions. Word has length 187 [2022-01-31 17:44:36,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:36,212 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 208 transitions. [2022-01-31 17:44:36,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0833333333333335) internal successors, (50), 23 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:36,212 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 208 transitions. [2022-01-31 17:44:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 17:44:36,212 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:36,213 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:36,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 17:44:36,213 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:36,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:36,213 INFO L85 PathProgramCache]: Analyzing trace with hash 2134800935, now seen corresponding path program 21 times [2022-01-31 17:44:36,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:36,213 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1778167310] [2022-01-31 17:44:36,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:36,214 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:36,214 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:36,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:36,217 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:36,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:36,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:36,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:36,525 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:36,525 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1778167310] [2022-01-31 17:44:36,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1778167310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:36,525 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:36,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 17:44:36,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199863311] [2022-01-31 17:44:36,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:36,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 17:44:36,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:36,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 17:44:36,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 17:44:36,526 INFO L87 Difference]: Start difference. First operand 200 states and 208 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:36,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:36,918 INFO L93 Difference]: Finished difference Result 380 states and 403 transitions. [2022-01-31 17:44:36,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 17:44:36,919 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 17:44:36,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:36,919 INFO L225 Difference]: With dead ends: 380 [2022-01-31 17:44:36,919 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 17:44:36,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=828, Invalid=1334, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:44:36,921 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 587 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 587 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:36,921 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [587 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 17:44:36,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 17:44:36,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 208. [2022-01-31 17:44:36,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.0445544554455446) internal successors, (211), 202 states have internal predecessors, (211), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:36,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 216 transitions. [2022-01-31 17:44:36,928 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 216 transitions. Word has length 195 [2022-01-31 17:44:36,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:36,928 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 216 transitions. [2022-01-31 17:44:36,928 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 24 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:36,928 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 216 transitions. [2022-01-31 17:44:36,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 17:44:36,929 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:36,929 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:36,929 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 17:44:36,929 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:36,929 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:36,929 INFO L85 PathProgramCache]: Analyzing trace with hash 899686443, now seen corresponding path program 22 times [2022-01-31 17:44:36,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:36,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045193122] [2022-01-31 17:44:36,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:36,930 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:36,930 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:36,931 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:36,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:37,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:37,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:37,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:37,265 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:37,265 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045193122] [2022-01-31 17:44:37,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045193122] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:37,265 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:37,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 17:44:37,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979177561] [2022-01-31 17:44:37,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:37,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 17:44:37,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:37,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 17:44:37,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 17:44:37,266 INFO L87 Difference]: Start difference. First operand 208 states and 216 transitions. Second operand has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:37,912 INFO L93 Difference]: Finished difference Result 395 states and 418 transitions. [2022-01-31 17:44:37,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 17:44:37,912 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 17:44:37,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:37,913 INFO L225 Difference]: With dead ends: 395 [2022-01-31 17:44:37,913 INFO L226 Difference]: Without dead ends: 216 [2022-01-31 17:44:37,914 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=900, Invalid=1452, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:44:37,914 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 232 mSolverCounterSat, 765 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 997 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 765 IncrementalHoareTripleChecker+Valid, 232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:37,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 997 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [765 Valid, 232 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:37,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-01-31 17:44:37,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 216. [2022-01-31 17:44:37,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.042857142857143) internal successors, (219), 210 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:37,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 224 transitions. [2022-01-31 17:44:37,920 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 224 transitions. Word has length 203 [2022-01-31 17:44:37,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:37,920 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 224 transitions. [2022-01-31 17:44:37,920 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0) internal successors, (52), 25 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:37,921 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 224 transitions. [2022-01-31 17:44:37,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 17:44:37,921 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:37,921 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:37,921 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 17:44:37,921 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:37,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:37,922 INFO L85 PathProgramCache]: Analyzing trace with hash -385822553, now seen corresponding path program 23 times [2022-01-31 17:44:37,922 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:37,922 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582412406] [2022-01-31 17:44:37,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:37,923 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:37,923 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:37,923 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:37,926 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:38,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:38,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:38,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:38,273 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:38,273 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582412406] [2022-01-31 17:44:38,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582412406] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:38,273 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:38,273 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 17:44:38,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950239353] [2022-01-31 17:44:38,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:38,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 17:44:38,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:38,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 17:44:38,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 17:44:38,274 INFO L87 Difference]: Start difference. First operand 216 states and 224 transitions. Second operand has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:38,932 INFO L93 Difference]: Finished difference Result 410 states and 433 transitions. [2022-01-31 17:44:38,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 17:44:38,932 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 17:44:38,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:38,933 INFO L225 Difference]: With dead ends: 410 [2022-01-31 17:44:38,933 INFO L226 Difference]: Without dead ends: 224 [2022-01-31 17:44:38,934 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=975, Invalid=1575, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:44:38,934 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 240 mSolverCounterSat, 850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 850 IncrementalHoareTripleChecker+Valid, 240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:38,934 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [850 Valid, 240 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:38,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-01-31 17:44:38,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-01-31 17:44:38,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.0412844036697249) internal successors, (227), 218 states have internal predecessors, (227), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:38,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 232 transitions. [2022-01-31 17:44:38,940 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 232 transitions. Word has length 211 [2022-01-31 17:44:38,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:38,941 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 232 transitions. [2022-01-31 17:44:38,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.962962962962963) internal successors, (53), 26 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:38,941 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 232 transitions. [2022-01-31 17:44:38,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 17:44:38,941 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:38,941 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:38,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 17:44:38,942 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:38,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:38,942 INFO L85 PathProgramCache]: Analyzing trace with hash 1926079147, now seen corresponding path program 24 times [2022-01-31 17:44:38,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:38,942 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1558507426] [2022-01-31 17:44:38,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:38,943 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:38,948 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:38,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:38,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:39,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:39,255 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 17:44:39,256 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:39,256 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1558507426] [2022-01-31 17:44:39,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1558507426] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:39,256 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:39,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 17:44:39,256 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806842179] [2022-01-31 17:44:39,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:39,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 17:44:39,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:39,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 17:44:39,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 17:44:39,262 INFO L87 Difference]: Start difference. First operand 224 states and 232 transitions. Second operand has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:39,854 INFO L93 Difference]: Finished difference Result 425 states and 448 transitions. [2022-01-31 17:44:39,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 17:44:39,854 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 17:44:39,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:39,855 INFO L225 Difference]: With dead ends: 425 [2022-01-31 17:44:39,855 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 17:44:39,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=1053, Invalid=1703, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:44:39,856 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 750 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1017 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 750 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:39,856 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1017 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [750 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:39,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 17:44:39,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 232. [2022-01-31 17:44:39,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.0398230088495575) internal successors, (235), 226 states have internal predecessors, (235), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:39,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 240 transitions. [2022-01-31 17:44:39,862 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 240 transitions. Word has length 219 [2022-01-31 17:44:39,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:39,862 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 240 transitions. [2022-01-31 17:44:39,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.9285714285714286) internal successors, (54), 27 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:39,863 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 240 transitions. [2022-01-31 17:44:39,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 17:44:39,863 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:39,863 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:39,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 17:44:39,864 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:39,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:39,864 INFO L85 PathProgramCache]: Analyzing trace with hash -718256345, now seen corresponding path program 25 times [2022-01-31 17:44:39,864 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:39,864 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141209722] [2022-01-31 17:44:39,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:39,865 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:39,865 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:39,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:39,869 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:39,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:40,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:40,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:40,219 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:40,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141209722] [2022-01-31 17:44:40,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [141209722] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:40,219 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:40,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 17:44:40,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102714932] [2022-01-31 17:44:40,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:40,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 17:44:40,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:40,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 17:44:40,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 17:44:40,222 INFO L87 Difference]: Start difference. First operand 232 states and 240 transitions. Second operand has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:40,809 INFO L93 Difference]: Finished difference Result 440 states and 463 transitions. [2022-01-31 17:44:40,809 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 17:44:40,809 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 17:44:40,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:40,810 INFO L225 Difference]: With dead ends: 440 [2022-01-31 17:44:40,810 INFO L226 Difference]: Without dead ends: 240 [2022-01-31 17:44:40,811 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1134, Invalid=1836, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:44:40,813 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 294 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 294 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:40,813 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 294 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:40,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-01-31 17:44:40,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-01-31 17:44:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.0384615384615385) internal successors, (243), 234 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 248 transitions. [2022-01-31 17:44:40,820 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 248 transitions. Word has length 227 [2022-01-31 17:44:40,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:40,820 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 248 transitions. [2022-01-31 17:44:40,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.896551724137931) internal successors, (55), 28 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:40,820 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 248 transitions. [2022-01-31 17:44:40,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 17:44:40,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:40,821 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:40,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 17:44:40,822 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:40,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:40,822 INFO L85 PathProgramCache]: Analyzing trace with hash 2139194667, now seen corresponding path program 26 times [2022-01-31 17:44:40,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:40,823 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8764097] [2022-01-31 17:44:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:40,824 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:40,824 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:40,824 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:40,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:41,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:41,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:41,230 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:41,230 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8764097] [2022-01-31 17:44:41,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [8764097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:41,230 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:41,231 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 17:44:41,231 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906734811] [2022-01-31 17:44:41,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:41,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 17:44:41,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:41,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 17:44:41,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 17:44:41,232 INFO L87 Difference]: Start difference. First operand 240 states and 248 transitions. Second operand has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:41,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:41,862 INFO L93 Difference]: Finished difference Result 455 states and 478 transitions. [2022-01-31 17:44:41,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 17:44:41,863 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 17:44:41,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:41,864 INFO L225 Difference]: With dead ends: 455 [2022-01-31 17:44:41,864 INFO L226 Difference]: Without dead ends: 248 [2022-01-31 17:44:41,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=1218, Invalid=1974, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:44:41,865 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 321 mSolverCounterSat, 675 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 675 IncrementalHoareTripleChecker+Valid, 321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:41,865 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [675 Valid, 321 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:41,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-01-31 17:44:41,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 248. [2022-01-31 17:44:41,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.037190082644628) internal successors, (251), 242 states have internal predecessors, (251), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:41,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 256 transitions. [2022-01-31 17:44:41,871 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 256 transitions. Word has length 235 [2022-01-31 17:44:41,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:41,872 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 256 transitions. [2022-01-31 17:44:41,872 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8666666666666667) internal successors, (56), 29 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:41,872 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 256 transitions. [2022-01-31 17:44:41,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 17:44:41,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:41,873 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:41,873 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 17:44:41,873 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:41,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:41,873 INFO L85 PathProgramCache]: Analyzing trace with hash 795663783, now seen corresponding path program 27 times [2022-01-31 17:44:41,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:41,873 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1366921882] [2022-01-31 17:44:41,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:41,874 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:41,874 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:41,874 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:41,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:42,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:42,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:42,298 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:42,298 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1366921882] [2022-01-31 17:44:42,298 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1366921882] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:42,298 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:42,298 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 17:44:42,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163802641] [2022-01-31 17:44:42,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:42,299 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 17:44:42,299 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:42,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 17:44:42,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 17:44:42,300 INFO L87 Difference]: Start difference. First operand 248 states and 256 transitions. Second operand has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:43,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:43,170 INFO L93 Difference]: Finished difference Result 470 states and 493 transitions. [2022-01-31 17:44:43,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 17:44:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 17:44:43,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:43,171 INFO L225 Difference]: With dead ends: 470 [2022-01-31 17:44:43,171 INFO L226 Difference]: Without dead ends: 256 [2022-01-31 17:44:43,173 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1305, Invalid=2117, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:44:43,173 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1200 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 909 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:43,173 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1200 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [909 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:43,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2022-01-31 17:44:43,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 256. [2022-01-31 17:44:43,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.036) internal successors, (259), 250 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:43,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 264 transitions. [2022-01-31 17:44:43,179 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 264 transitions. Word has length 243 [2022-01-31 17:44:43,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:43,179 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 264 transitions. [2022-01-31 17:44:43,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.8387096774193548) internal successors, (57), 30 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:43,180 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 264 transitions. [2022-01-31 17:44:43,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 17:44:43,180 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:43,180 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:43,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 17:44:43,180 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:43,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:43,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1935947861, now seen corresponding path program 28 times [2022-01-31 17:44:43,181 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:43,181 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [360530310] [2022-01-31 17:44:43,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:43,182 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:43,182 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:43,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:43,186 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:43,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:43,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:43,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:43,625 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 17:44:43,626 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:43,626 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [360530310] [2022-01-31 17:44:43,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [360530310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:43,626 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:43,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 17:44:43,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [881344938] [2022-01-31 17:44:43,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:43,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 17:44:43,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:43,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 17:44:43,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 17:44:43,627 INFO L87 Difference]: Start difference. First operand 256 states and 264 transitions. Second operand has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:44,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:44,471 INFO L93 Difference]: Finished difference Result 485 states and 508 transitions. [2022-01-31 17:44:44,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 17:44:44,471 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 17:44:44,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:44,472 INFO L225 Difference]: With dead ends: 485 [2022-01-31 17:44:44,472 INFO L226 Difference]: Without dead ends: 264 [2022-01-31 17:44:44,473 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1395, Invalid=2265, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:44:44,480 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 280 mSolverCounterSat, 897 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 1177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 897 IncrementalHoareTripleChecker+Valid, 280 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:44,480 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 1177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [897 Valid, 280 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:44,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-01-31 17:44:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 264. [2022-01-31 17:44:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.0348837209302326) internal successors, (267), 258 states have internal predecessors, (267), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 272 transitions. [2022-01-31 17:44:44,487 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 272 transitions. Word has length 251 [2022-01-31 17:44:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 272 transitions. [2022-01-31 17:44:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.8125) internal successors, (58), 31 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:44,488 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 272 transitions. [2022-01-31 17:44:44,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 17:44:44,488 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:44,488 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:44,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 17:44:44,489 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:44,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:44,489 INFO L85 PathProgramCache]: Analyzing trace with hash 22451239, now seen corresponding path program 29 times [2022-01-31 17:44:44,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:44,489 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290916242] [2022-01-31 17:44:44,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:44,490 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:44,490 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:44,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:44,494 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:44,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:44,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:44,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290916242] [2022-01-31 17:44:44,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [290916242] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:44,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:44,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 17:44:44,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104910329] [2022-01-31 17:44:44,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:44,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 17:44:44,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:44,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 17:44:44,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 17:44:44,909 INFO L87 Difference]: Start difference. First operand 264 states and 272 transitions. Second operand has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:45,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:45,687 INFO L93 Difference]: Finished difference Result 500 states and 523 transitions. [2022-01-31 17:44:45,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 17:44:45,687 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 17:44:45,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:45,688 INFO L225 Difference]: With dead ends: 500 [2022-01-31 17:44:45,688 INFO L226 Difference]: Without dead ends: 272 [2022-01-31 17:44:45,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1488, Invalid=2418, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:44:45,690 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 383 mSolverCounterSat, 776 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1159 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 776 IncrementalHoareTripleChecker+Valid, 383 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:45,690 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1159 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [776 Valid, 383 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:45,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-01-31 17:44:45,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-01-31 17:44:45,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.0338345864661653) internal successors, (275), 266 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:45,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 280 transitions. [2022-01-31 17:44:45,696 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 280 transitions. Word has length 259 [2022-01-31 17:44:45,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:45,696 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 280 transitions. [2022-01-31 17:44:45,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7878787878787878) internal successors, (59), 32 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:45,696 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 280 transitions. [2022-01-31 17:44:45,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 17:44:45,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:45,697 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:45,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 17:44:45,697 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:45,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:45,698 INFO L85 PathProgramCache]: Analyzing trace with hash -855872981, now seen corresponding path program 30 times [2022-01-31 17:44:45,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:45,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1596579823] [2022-01-31 17:44:45,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:45,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:45,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:45,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:45,711 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:45,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:46,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:46,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:46,217 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:46,217 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1596579823] [2022-01-31 17:44:46,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1596579823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:46,218 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:46,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 17:44:46,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28196633] [2022-01-31 17:44:46,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:46,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 17:44:46,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:46,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 17:44:46,219 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 17:44:46,219 INFO L87 Difference]: Start difference. First operand 272 states and 280 transitions. Second operand has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:47,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:47,095 INFO L93 Difference]: Finished difference Result 515 states and 538 transitions. [2022-01-31 17:44:47,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 17:44:47,096 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 17:44:47,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:47,097 INFO L225 Difference]: With dead ends: 515 [2022-01-31 17:44:47,097 INFO L226 Difference]: Without dead ends: 280 [2022-01-31 17:44:47,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1584, Invalid=2576, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:44:47,098 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 315 mSolverCounterSat, 926 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 926 IncrementalHoareTripleChecker+Valid, 315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:47,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [926 Valid, 315 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:47,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-01-31 17:44:47,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-01-31 17:44:47,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.032846715328467) internal successors, (283), 274 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:47,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 288 transitions. [2022-01-31 17:44:47,105 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 288 transitions. Word has length 267 [2022-01-31 17:44:47,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:47,105 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 288 transitions. [2022-01-31 17:44:47,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.7647058823529411) internal successors, (60), 33 states have internal predecessors, (60), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:47,105 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 288 transitions. [2022-01-31 17:44:47,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 17:44:47,106 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:47,106 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:47,106 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 17:44:47,106 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:47,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:47,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1921870503, now seen corresponding path program 31 times [2022-01-31 17:44:47,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:47,107 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1922368955] [2022-01-31 17:44:47,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:47,107 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:47,107 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:47,107 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:47,112 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:47,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:47,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:47,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:47,601 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 17:44:47,601 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:47,601 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1922368955] [2022-01-31 17:44:47,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1922368955] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:47,601 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:47,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 17:44:47,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791054217] [2022-01-31 17:44:47,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:47,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 17:44:47,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:47,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 17:44:47,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 17:44:47,603 INFO L87 Difference]: Start difference. First operand 280 states and 288 transitions. Second operand has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:48,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:48,531 INFO L93 Difference]: Finished difference Result 530 states and 553 transitions. [2022-01-31 17:44:48,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 17:44:48,531 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 17:44:48,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:48,532 INFO L225 Difference]: With dead ends: 530 [2022-01-31 17:44:48,532 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 17:44:48,533 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1683, Invalid=2739, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:44:48,534 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 380 mSolverCounterSat, 807 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 807 IncrementalHoareTripleChecker+Valid, 380 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:48,534 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 1187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [807 Valid, 380 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:48,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 17:44:48,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2022-01-31 17:44:48,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.0319148936170213) internal successors, (291), 282 states have internal predecessors, (291), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:48,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 296 transitions. [2022-01-31 17:44:48,540 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 296 transitions. Word has length 275 [2022-01-31 17:44:48,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:48,540 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 296 transitions. [2022-01-31 17:44:48,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.7428571428571429) internal successors, (61), 34 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:48,541 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 296 transitions. [2022-01-31 17:44:48,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 17:44:48,541 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:48,541 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:48,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 17:44:48,542 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:48,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:48,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1971547307, now seen corresponding path program 32 times [2022-01-31 17:44:48,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:48,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576631314] [2022-01-31 17:44:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:48,543 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:48,543 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:48,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:48,547 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:48,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:49,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:49,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:49,041 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 17:44:49,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:49,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576631314] [2022-01-31 17:44:49,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576631314] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:49,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:49,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 17:44:49,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411251427] [2022-01-31 17:44:49,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:49,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 17:44:49,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:49,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 17:44:49,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 17:44:49,043 INFO L87 Difference]: Start difference. First operand 288 states and 296 transitions. Second operand has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:50,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:50,049 INFO L93 Difference]: Finished difference Result 545 states and 568 transitions. [2022-01-31 17:44:50,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 17:44:50,049 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 17:44:50,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:50,050 INFO L225 Difference]: With dead ends: 545 [2022-01-31 17:44:50,050 INFO L226 Difference]: Without dead ends: 296 [2022-01-31 17:44:50,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1785, Invalid=2907, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:44:50,052 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 949 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:50,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 1299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [949 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:44:50,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-01-31 17:44:50,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 296. [2022-01-31 17:44:50,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.0310344827586206) internal successors, (299), 290 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:50,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 304 transitions. [2022-01-31 17:44:50,061 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 304 transitions. Word has length 283 [2022-01-31 17:44:50,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:50,061 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 304 transitions. [2022-01-31 17:44:50,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 35 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:50,061 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 304 transitions. [2022-01-31 17:44:50,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 17:44:50,062 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:50,063 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:50,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 17:44:50,063 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:50,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:50,063 INFO L85 PathProgramCache]: Analyzing trace with hash -927899353, now seen corresponding path program 33 times [2022-01-31 17:44:50,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:50,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1332958659] [2022-01-31 17:44:50,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:50,064 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:50,064 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:50,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:50,070 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:50,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:50,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:50,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:50,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:50,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:50,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1332958659] [2022-01-31 17:44:50,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1332958659] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:50,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:50,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 17:44:50,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608481988] [2022-01-31 17:44:50,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:50,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 17:44:50,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:50,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 17:44:50,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 17:44:50,631 INFO L87 Difference]: Start difference. First operand 296 states and 304 transitions. Second operand has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:51,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:51,552 INFO L93 Difference]: Finished difference Result 560 states and 583 transitions. [2022-01-31 17:44:51,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 17:44:51,553 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 17:44:51,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:51,553 INFO L225 Difference]: With dead ends: 560 [2022-01-31 17:44:51,553 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 17:44:51,555 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1890, Invalid=3080, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:44:51,555 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 1196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 1497 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1196 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:51,555 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 38 Invalid, 1497 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1196 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:51,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 17:44:51,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 304. [2022-01-31 17:44:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.0302013422818792) internal successors, (307), 298 states have internal predecessors, (307), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 312 transitions. [2022-01-31 17:44:51,562 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 312 transitions. Word has length 291 [2022-01-31 17:44:51,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:51,563 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 312 transitions. [2022-01-31 17:44:51,563 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.7027027027027026) internal successors, (63), 36 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 312 transitions. [2022-01-31 17:44:51,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 17:44:51,564 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:51,564 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:51,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 17:44:51,564 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:51,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:51,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1122971861, now seen corresponding path program 34 times [2022-01-31 17:44:51,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:51,564 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322513623] [2022-01-31 17:44:51,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:51,565 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:51,565 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:51,565 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:51,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:51,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:52,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:52,189 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 17:44:52,189 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:52,190 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322513623] [2022-01-31 17:44:52,190 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322513623] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:52,190 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:52,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 17:44:52,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307524907] [2022-01-31 17:44:52,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:52,190 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 17:44:52,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:52,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 17:44:52,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 17:44:52,191 INFO L87 Difference]: Start difference. First operand 304 states and 312 transitions. Second operand has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:53,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:53,274 INFO L93 Difference]: Finished difference Result 575 states and 598 transitions. [2022-01-31 17:44:53,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 17:44:53,274 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 17:44:53,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:53,275 INFO L225 Difference]: With dead ends: 575 [2022-01-31 17:44:53,275 INFO L226 Difference]: Without dead ends: 312 [2022-01-31 17:44:53,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1998, Invalid=3258, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:44:53,276 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 423 mSolverCounterSat, 934 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 934 IncrementalHoareTripleChecker+Valid, 423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:53,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [934 Valid, 423 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:44:53,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 312 states. [2022-01-31 17:44:53,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 312 to 312. [2022-01-31 17:44:53,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.0294117647058822) internal successors, (315), 306 states have internal predecessors, (315), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:53,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 320 transitions. [2022-01-31 17:44:53,284 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 320 transitions. Word has length 299 [2022-01-31 17:44:53,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:53,284 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 320 transitions. [2022-01-31 17:44:53,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.6842105263157894) internal successors, (64), 37 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:53,284 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 320 transitions. [2022-01-31 17:44:53,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 17:44:53,285 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:53,285 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:53,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 17:44:53,285 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:53,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:53,285 INFO L85 PathProgramCache]: Analyzing trace with hash 1734506407, now seen corresponding path program 35 times [2022-01-31 17:44:53,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:53,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [628012524] [2022-01-31 17:44:53,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:53,286 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:53,286 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:53,286 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:53,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:53,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:53,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:53,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:53,954 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 17:44:53,954 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:53,954 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [628012524] [2022-01-31 17:44:53,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [628012524] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:53,954 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:53,954 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 17:44:53,954 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970372407] [2022-01-31 17:44:53,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:53,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 17:44:53,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:53,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 17:44:53,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 17:44:53,956 INFO L87 Difference]: Start difference. First operand 312 states and 320 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:54,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:54,725 INFO L93 Difference]: Finished difference Result 590 states and 613 transitions. [2022-01-31 17:44:54,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 17:44:54,725 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 17:44:54,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:54,737 INFO L225 Difference]: With dead ends: 590 [2022-01-31 17:44:54,737 INFO L226 Difference]: Without dead ends: 320 [2022-01-31 17:44:54,738 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=2109, Invalid=3441, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:44:54,739 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 431 mSolverCounterSat, 1127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1127 IncrementalHoareTripleChecker+Valid, 431 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:54,739 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1127 Valid, 431 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:44:54,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-01-31 17:44:54,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-01-31 17:44:54,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.0286624203821657) internal successors, (323), 314 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:54,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 328 transitions. [2022-01-31 17:44:54,763 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 328 transitions. Word has length 307 [2022-01-31 17:44:54,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:54,764 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 328 transitions. [2022-01-31 17:44:54,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:54,764 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 328 transitions. [2022-01-31 17:44:54,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 17:44:54,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:54,767 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:54,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 17:44:54,767 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:54,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:54,767 INFO L85 PathProgramCache]: Analyzing trace with hash -595291733, now seen corresponding path program 36 times [2022-01-31 17:44:54,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:54,767 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241691128] [2022-01-31 17:44:54,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:54,768 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:54,768 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:54,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:54,775 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:54,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:55,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:55,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:55,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:55,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:55,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241691128] [2022-01-31 17:44:55,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241691128] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:55,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:55,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 17:44:55,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17976216] [2022-01-31 17:44:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:55,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 17:44:55,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 17:44:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 17:44:55,403 INFO L87 Difference]: Start difference. First operand 320 states and 328 transitions. Second operand has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:56,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:56,444 INFO L93 Difference]: Finished difference Result 605 states and 628 transitions. [2022-01-31 17:44:56,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 17:44:56,444 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 17:44:56,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:56,445 INFO L225 Difference]: With dead ends: 605 [2022-01-31 17:44:56,445 INFO L226 Difference]: Without dead ends: 328 [2022-01-31 17:44:56,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=2223, Invalid=3629, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:44:56,472 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 401 mSolverCounterSat, 1093 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1494 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1093 IncrementalHoareTripleChecker+Valid, 401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:56,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 1494 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1093 Valid, 401 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:56,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-01-31 17:44:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-01-31 17:44:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.0279503105590062) internal successors, (331), 322 states have internal predecessors, (331), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 336 transitions. [2022-01-31 17:44:56,480 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 336 transitions. Word has length 315 [2022-01-31 17:44:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:56,480 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 336 transitions. [2022-01-31 17:44:56,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.65) internal successors, (66), 39 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 336 transitions. [2022-01-31 17:44:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 17:44:56,482 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:56,482 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:56,482 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 17:44:56,482 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:56,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:56,482 INFO L85 PathProgramCache]: Analyzing trace with hash -801067481, now seen corresponding path program 37 times [2022-01-31 17:44:56,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:56,482 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1985317292] [2022-01-31 17:44:56,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:56,484 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:56,484 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:56,485 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:56,498 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:56,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:57,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:57,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:57,154 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 17:44:57,154 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:57,154 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1985317292] [2022-01-31 17:44:57,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1985317292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:57,154 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:57,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 17:44:57,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35670380] [2022-01-31 17:44:57,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:57,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 17:44:57,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:57,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 17:44:57,155 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 17:44:57,155 INFO L87 Difference]: Start difference. First operand 328 states and 336 transitions. Second operand has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:44:58,252 INFO L93 Difference]: Finished difference Result 620 states and 643 transitions. [2022-01-31 17:44:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 17:44:58,252 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 17:44:58,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:44:58,254 INFO L225 Difference]: With dead ends: 620 [2022-01-31 17:44:58,255 INFO L226 Difference]: Without dead ends: 336 [2022-01-31 17:44:58,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2340, Invalid=3822, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:44:58,264 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 1269 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1659 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1269 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:44:58,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 1659 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1269 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:44:58,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-01-31 17:44:58,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 336. [2022-01-31 17:44:58,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.0272727272727273) internal successors, (339), 330 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:44:58,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 344 transitions. [2022-01-31 17:44:58,283 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 344 transitions. Word has length 323 [2022-01-31 17:44:58,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:44:58,289 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 344 transitions. [2022-01-31 17:44:58,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.6341463414634145) internal successors, (67), 40 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:44:58,289 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 344 transitions. [2022-01-31 17:44:58,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 17:44:58,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:44:58,290 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:44:58,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 17:44:58,291 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:44:58,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:44:58,291 INFO L85 PathProgramCache]: Analyzing trace with hash 247378987, now seen corresponding path program 38 times [2022-01-31 17:44:58,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:44:58,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [314385154] [2022-01-31 17:44:58,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:44:58,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:44:58,292 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:44:58,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:44:58,298 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:44:58,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:59,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:44:59,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:44:59,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:44:59,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:44:59,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [314385154] [2022-01-31 17:44:59,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [314385154] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:44:59,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:44:59,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 17:44:59,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118470955] [2022-01-31 17:44:59,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:44:59,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 17:44:59,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:44:59,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 17:44:59,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 17:44:59,103 INFO L87 Difference]: Start difference. First operand 336 states and 344 transitions. Second operand has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:00,013 INFO L93 Difference]: Finished difference Result 635 states and 658 transitions. [2022-01-31 17:45:00,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 17:45:00,014 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 17:45:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:00,015 INFO L225 Difference]: With dead ends: 635 [2022-01-31 17:45:00,015 INFO L226 Difference]: Without dead ends: 344 [2022-01-31 17:45:00,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=2460, Invalid=4020, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:45:00,017 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 417 mSolverCounterSat, 1114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 1531 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1114 IncrementalHoareTripleChecker+Valid, 417 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:00,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 1531 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1114 Valid, 417 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 17:45:00,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 344 states. [2022-01-31 17:45:00,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 344 to 344. [2022-01-31 17:45:00,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.0266272189349113) internal successors, (347), 338 states have internal predecessors, (347), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:00,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 352 transitions. [2022-01-31 17:45:00,037 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 352 transitions. Word has length 331 [2022-01-31 17:45:00,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:00,037 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 352 transitions. [2022-01-31 17:45:00,037 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.619047619047619) internal successors, (68), 41 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:00,037 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 352 transitions. [2022-01-31 17:45:00,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 17:45:00,039 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:00,039 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:00,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 17:45:00,039 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:00,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:00,055 INFO L85 PathProgramCache]: Analyzing trace with hash -1561590617, now seen corresponding path program 39 times [2022-01-31 17:45:00,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:00,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8080013] [2022-01-31 17:45:00,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:00,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:00,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:00,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:00,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:00,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:00,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:00,891 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 17:45:00,891 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:00,891 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8080013] [2022-01-31 17:45:00,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [8080013] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:00,891 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:00,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 17:45:00,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860555641] [2022-01-31 17:45:00,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:00,892 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 17:45:00,892 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:00,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 17:45:00,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 17:45:00,893 INFO L87 Difference]: Start difference. First operand 344 states and 352 transitions. Second operand has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:02,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:02,196 INFO L93 Difference]: Finished difference Result 650 states and 673 transitions. [2022-01-31 17:45:02,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 17:45:02,197 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 17:45:02,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:02,198 INFO L225 Difference]: With dead ends: 650 [2022-01-31 17:45:02,198 INFO L226 Difference]: Without dead ends: 352 [2022-01-31 17:45:02,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2583, Invalid=4223, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:45:02,199 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 482 mSolverCounterSat, 1045 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1527 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1045 IncrementalHoareTripleChecker+Valid, 482 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:02,199 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 1527 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1045 Valid, 482 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:02,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 352 states. [2022-01-31 17:45:02,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 352 to 352. [2022-01-31 17:45:02,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.0260115606936415) internal successors, (355), 346 states have internal predecessors, (355), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:02,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 360 transitions. [2022-01-31 17:45:02,207 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 360 transitions. Word has length 339 [2022-01-31 17:45:02,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:02,207 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 360 transitions. [2022-01-31 17:45:02,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.6046511627906976) internal successors, (69), 42 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:02,208 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 360 transitions. [2022-01-31 17:45:02,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 17:45:02,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:02,209 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:02,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 17:45:02,209 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:02,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:02,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1868613973, now seen corresponding path program 40 times [2022-01-31 17:45:02,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:02,209 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [258027849] [2022-01-31 17:45:02,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:02,211 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:02,211 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:02,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:02,222 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:02,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:03,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:03,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:03,023 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:03,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [258027849] [2022-01-31 17:45:03,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [258027849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:03,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:03,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 17:45:03,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371718727] [2022-01-31 17:45:03,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:03,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 17:45:03,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:03,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 17:45:03,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 17:45:03,024 INFO L87 Difference]: Start difference. First operand 352 states and 360 transitions. Second operand has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 43 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:04,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:04,451 INFO L93 Difference]: Finished difference Result 665 states and 688 transitions. [2022-01-31 17:45:04,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 17:45:04,451 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 43 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 17:45:04,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:04,452 INFO L225 Difference]: With dead ends: 665 [2022-01-31 17:45:04,452 INFO L226 Difference]: Without dead ends: 360 [2022-01-31 17:45:04,454 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2709, Invalid=4431, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:45:04,454 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 395 mSolverCounterSat, 1462 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1462 IncrementalHoareTripleChecker+Valid, 395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:04,454 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1462 Valid, 395 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:04,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-01-31 17:45:04,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 360. [2022-01-31 17:45:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.0254237288135593) internal successors, (363), 354 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:04,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 368 transitions. [2022-01-31 17:45:04,463 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 368 transitions. Word has length 347 [2022-01-31 17:45:04,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:04,463 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 368 transitions. [2022-01-31 17:45:04,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.5909090909090908) internal successors, (70), 43 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:04,463 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 368 transitions. [2022-01-31 17:45:04,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 17:45:04,464 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:04,464 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:04,464 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 17:45:04,464 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:04,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:04,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1660650713, now seen corresponding path program 41 times [2022-01-31 17:45:04,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:04,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343599684] [2022-01-31 17:45:04,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:04,466 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:04,466 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:04,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:04,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:04,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:05,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:05,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:05,257 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 17:45:05,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:05,259 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343599684] [2022-01-31 17:45:05,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343599684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:05,259 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:05,259 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 17:45:05,259 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120020688] [2022-01-31 17:45:05,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:05,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 17:45:05,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:05,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 17:45:05,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 17:45:05,260 INFO L87 Difference]: Start difference. First operand 360 states and 368 transitions. Second operand has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:06,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:06,273 INFO L93 Difference]: Finished difference Result 680 states and 703 transitions. [2022-01-31 17:45:06,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 17:45:06,288 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 17:45:06,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:06,289 INFO L225 Difference]: With dead ends: 680 [2022-01-31 17:45:06,289 INFO L226 Difference]: Without dead ends: 368 [2022-01-31 17:45:06,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2838, Invalid=4644, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:45:06,291 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 422 mSolverCounterSat, 1281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 1703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1281 IncrementalHoareTripleChecker+Valid, 422 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:06,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 1703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1281 Valid, 422 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 17:45:06,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 368 states. [2022-01-31 17:45:06,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 368 to 368. [2022-01-31 17:45:06,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.0248618784530388) internal successors, (371), 362 states have internal predecessors, (371), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:06,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 376 transitions. [2022-01-31 17:45:06,301 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 376 transitions. Word has length 355 [2022-01-31 17:45:06,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:06,302 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 376 transitions. [2022-01-31 17:45:06,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5777777777777777) internal successors, (71), 44 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:06,303 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 376 transitions. [2022-01-31 17:45:06,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 17:45:06,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:06,304 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:06,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 17:45:06,304 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:06,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:06,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1593435861, now seen corresponding path program 42 times [2022-01-31 17:45:06,304 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:06,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [205129784] [2022-01-31 17:45:06,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:06,305 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:06,306 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:06,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:06,313 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:06,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:07,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:07,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:07,134 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:07,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [205129784] [2022-01-31 17:45:07,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [205129784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:07,134 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:07,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 17:45:07,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133996360] [2022-01-31 17:45:07,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:07,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 17:45:07,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:07,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 17:45:07,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 17:45:07,136 INFO L87 Difference]: Start difference. First operand 368 states and 376 transitions. Second operand has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 45 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:08,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:08,586 INFO L93 Difference]: Finished difference Result 695 states and 718 transitions. [2022-01-31 17:45:08,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 17:45:08,587 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 45 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 17:45:08,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:08,588 INFO L225 Difference]: With dead ends: 695 [2022-01-31 17:45:08,588 INFO L226 Difference]: Without dead ends: 376 [2022-01-31 17:45:08,589 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2970, Invalid=4862, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:45:08,589 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 487 mSolverCounterSat, 1077 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1077 IncrementalHoareTripleChecker+Valid, 487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:08,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1077 Valid, 487 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:08,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 376 states. [2022-01-31 17:45:08,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 376 to 376. [2022-01-31 17:45:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 370 states have internal predecessors, (379), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 384 transitions. [2022-01-31 17:45:08,597 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 384 transitions. Word has length 363 [2022-01-31 17:45:08,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:08,597 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 384 transitions. [2022-01-31 17:45:08,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.565217391304348) internal successors, (72), 45 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:08,597 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 384 transitions. [2022-01-31 17:45:08,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 17:45:08,598 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:08,598 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:08,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 17:45:08,599 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:08,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:08,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1708519001, now seen corresponding path program 43 times [2022-01-31 17:45:08,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:08,599 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966748283] [2022-01-31 17:45:08,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:08,600 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:08,600 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:08,600 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:08,607 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:08,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:09,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:09,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:09,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:09,446 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:09,446 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966748283] [2022-01-31 17:45:09,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [966748283] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:09,446 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:09,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 17:45:09,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998536020] [2022-01-31 17:45:09,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:09,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 17:45:09,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:09,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 17:45:09,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 17:45:09,447 INFO L87 Difference]: Start difference. First operand 376 states and 384 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:10,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:10,947 INFO L93 Difference]: Finished difference Result 710 states and 733 transitions. [2022-01-31 17:45:10,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 17:45:10,948 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 371 [2022-01-31 17:45:10,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:10,949 INFO L225 Difference]: With dead ends: 710 [2022-01-31 17:45:10,949 INFO L226 Difference]: Without dead ends: 384 [2022-01-31 17:45:10,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 989 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3105, Invalid=5085, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:45:10,952 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 419 mSolverCounterSat, 1562 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 1981 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1562 IncrementalHoareTripleChecker+Valid, 419 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:10,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 1981 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1562 Valid, 419 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:10,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2022-01-31 17:45:10,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 384. [2022-01-31 17:45:10,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 384 states, 378 states have (on average 1.0238095238095237) internal successors, (387), 378 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:10,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 384 states to 384 states and 392 transitions. [2022-01-31 17:45:10,970 INFO L78 Accepts]: Start accepts. Automaton has 384 states and 392 transitions. Word has length 371 [2022-01-31 17:45:10,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:10,970 INFO L470 AbstractCegarLoop]: Abstraction has 384 states and 392 transitions. [2022-01-31 17:45:10,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:10,970 INFO L276 IsEmpty]: Start isEmpty. Operand 384 states and 392 transitions. [2022-01-31 17:45:10,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 380 [2022-01-31 17:45:10,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:10,979 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:10,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 17:45:10,980 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:10,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:10,980 INFO L85 PathProgramCache]: Analyzing trace with hash -2133632085, now seen corresponding path program 44 times [2022-01-31 17:45:10,980 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:10,980 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514621584] [2022-01-31 17:45:10,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:10,982 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:10,982 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:10,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:10,998 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:11,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:11,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:11,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:11,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:11,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:11,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514621584] [2022-01-31 17:45:11,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [514621584] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:11,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:11,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 17:45:11,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871683463] [2022-01-31 17:45:11,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:11,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 17:45:11,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:11,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 17:45:11,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 17:45:11,872 INFO L87 Difference]: Start difference. First operand 384 states and 392 transitions. Second operand has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:13,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:13,507 INFO L93 Difference]: Finished difference Result 725 states and 748 transitions. [2022-01-31 17:45:13,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 17:45:13,507 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 379 [2022-01-31 17:45:13,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:13,508 INFO L225 Difference]: With dead ends: 725 [2022-01-31 17:45:13,508 INFO L226 Difference]: Without dead ends: 392 [2022-01-31 17:45:13,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=3243, Invalid=5313, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:45:13,510 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 522 mSolverCounterSat, 1267 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1789 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1267 IncrementalHoareTripleChecker+Valid, 522 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:13,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 1789 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1267 Valid, 522 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:13,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 392 states. [2022-01-31 17:45:13,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 392 to 392. [2022-01-31 17:45:13,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 392 states, 386 states have (on average 1.0233160621761659) internal successors, (395), 386 states have internal predecessors, (395), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:13,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 392 states to 392 states and 400 transitions. [2022-01-31 17:45:13,518 INFO L78 Accepts]: Start accepts. Automaton has 392 states and 400 transitions. Word has length 379 [2022-01-31 17:45:13,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:13,518 INFO L470 AbstractCegarLoop]: Abstraction has 392 states and 400 transitions. [2022-01-31 17:45:13,518 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.5416666666666667) internal successors, (74), 47 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:13,518 INFO L276 IsEmpty]: Start isEmpty. Operand 392 states and 400 transitions. [2022-01-31 17:45:13,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 388 [2022-01-31 17:45:13,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:13,519 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:13,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 17:45:13,520 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:13,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:13,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1812150233, now seen corresponding path program 45 times [2022-01-31 17:45:13,520 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:13,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1343068827] [2022-01-31 17:45:13,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:13,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:13,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:13,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:13,529 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:13,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:14,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:14,460 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 17:45:14,460 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:14,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1343068827] [2022-01-31 17:45:14,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1343068827] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:14,461 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:14,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 17:45:14,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580014544] [2022-01-31 17:45:14,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:14,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 17:45:14,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:14,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 17:45:14,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 17:45:14,462 INFO L87 Difference]: Start difference. First operand 392 states and 400 transitions. Second operand has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:16,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:16,100 INFO L93 Difference]: Finished difference Result 740 states and 763 transitions. [2022-01-31 17:45:16,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 17:45:16,100 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 387 [2022-01-31 17:45:16,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:16,102 INFO L225 Difference]: With dead ends: 740 [2022-01-31 17:45:16,102 INFO L226 Difference]: Without dead ends: 400 [2022-01-31 17:45:16,104 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3384, Invalid=5546, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:45:16,105 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 454 mSolverCounterSat, 1590 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1590 IncrementalHoareTripleChecker+Valid, 454 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:16,105 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1590 Valid, 454 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:16,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2022-01-31 17:45:16,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 400. [2022-01-31 17:45:16,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 394 states have (on average 1.0228426395939085) internal successors, (403), 394 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:16,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 408 transitions. [2022-01-31 17:45:16,116 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 408 transitions. Word has length 387 [2022-01-31 17:45:16,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:16,116 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 408 transitions. [2022-01-31 17:45:16,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.530612244897959) internal successors, (75), 48 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:16,116 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 408 transitions. [2022-01-31 17:45:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 396 [2022-01-31 17:45:16,117 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:16,118 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:16,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 17:45:16,118 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1927740971, now seen corresponding path program 46 times [2022-01-31 17:45:16,118 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:16,118 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2110337148] [2022-01-31 17:45:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:16,119 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:16,119 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:16,120 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:16,128 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:16,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:17,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:17,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:17,091 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 17:45:17,091 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:17,091 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2110337148] [2022-01-31 17:45:17,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2110337148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:17,092 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:17,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 17:45:17,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603993532] [2022-01-31 17:45:17,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:17,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 17:45:17,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:17,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 17:45:17,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 17:45:17,093 INFO L87 Difference]: Start difference. First operand 400 states and 408 transitions. Second operand has 50 states, 50 states have (on average 1.52) internal successors, (76), 49 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:18,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:18,854 INFO L93 Difference]: Finished difference Result 755 states and 778 transitions. [2022-01-31 17:45:18,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 17:45:18,854 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 49 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 395 [2022-01-31 17:45:18,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:18,855 INFO L225 Difference]: With dead ends: 755 [2022-01-31 17:45:18,856 INFO L226 Difference]: Without dead ends: 408 [2022-01-31 17:45:18,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1127 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3528, Invalid=5784, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:45:18,857 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 500 mSolverCounterSat, 1391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 1891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1391 IncrementalHoareTripleChecker+Valid, 500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:18,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 1891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1391 Valid, 500 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:18,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 408 states. [2022-01-31 17:45:18,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 408 to 408. [2022-01-31 17:45:18,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 408 states, 402 states have (on average 1.0223880597014925) internal successors, (411), 402 states have internal predecessors, (411), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:18,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 408 states to 408 states and 416 transitions. [2022-01-31 17:45:18,865 INFO L78 Accepts]: Start accepts. Automaton has 408 states and 416 transitions. Word has length 395 [2022-01-31 17:45:18,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:18,865 INFO L470 AbstractCegarLoop]: Abstraction has 408 states and 416 transitions. [2022-01-31 17:45:18,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.52) internal successors, (76), 49 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:18,865 INFO L276 IsEmpty]: Start isEmpty. Operand 408 states and 416 transitions. [2022-01-31 17:45:18,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 404 [2022-01-31 17:45:18,866 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:18,866 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:18,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 17:45:18,867 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:18,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:18,867 INFO L85 PathProgramCache]: Analyzing trace with hash -1575182681, now seen corresponding path program 47 times [2022-01-31 17:45:18,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:18,867 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [375948077] [2022-01-31 17:45:18,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:18,868 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:18,868 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:18,868 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:18,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:18,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:19,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:19,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:19,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:19,596 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:19,596 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [375948077] [2022-01-31 17:45:19,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [375948077] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:19,596 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:19,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 17:45:19,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086732619] [2022-01-31 17:45:19,597 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:19,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 17:45:19,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:19,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 17:45:19,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 17:45:19,598 INFO L87 Difference]: Start difference. First operand 408 states and 416 transitions. Second operand has 51 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 50 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:20,835 INFO L93 Difference]: Finished difference Result 770 states and 793 transitions. [2022-01-31 17:45:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 17:45:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 50 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 403 [2022-01-31 17:45:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:20,836 INFO L225 Difference]: With dead ends: 770 [2022-01-31 17:45:20,836 INFO L226 Difference]: Without dead ends: 416 [2022-01-31 17:45:20,837 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1175 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=3675, Invalid=6027, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:45:20,837 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 1610 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2080 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1610 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:20,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2080 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1610 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-01-31 17:45:20,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 416. [2022-01-31 17:45:20,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 416 states, 410 states have (on average 1.0219512195121951) internal successors, (419), 410 states have internal predecessors, (419), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:20,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 416 states to 416 states and 424 transitions. [2022-01-31 17:45:20,846 INFO L78 Accepts]: Start accepts. Automaton has 416 states and 424 transitions. Word has length 403 [2022-01-31 17:45:20,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:20,846 INFO L470 AbstractCegarLoop]: Abstraction has 416 states and 424 transitions. [2022-01-31 17:45:20,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.5098039215686274) internal successors, (77), 50 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:20,846 INFO L276 IsEmpty]: Start isEmpty. Operand 416 states and 424 transitions. [2022-01-31 17:45:20,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 412 [2022-01-31 17:45:20,847 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:20,847 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:20,847 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 17:45:20,847 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:20,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:20,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1138687829, now seen corresponding path program 48 times [2022-01-31 17:45:20,848 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:20,848 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1747639357] [2022-01-31 17:45:20,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:20,849 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:20,849 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:20,849 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:20,875 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:21,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:21,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:21,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:21,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:21,893 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:21,894 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1747639357] [2022-01-31 17:45:21,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1747639357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:21,894 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:21,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 17:45:21,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864567215] [2022-01-31 17:45:21,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:21,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 17:45:21,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:21,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 17:45:21,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 17:45:21,896 INFO L87 Difference]: Start difference. First operand 416 states and 424 transitions. Second operand has 52 states, 52 states have (on average 1.5) internal successors, (78), 51 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:23,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:23,240 INFO L93 Difference]: Finished difference Result 785 states and 808 transitions. [2022-01-31 17:45:23,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 17:45:23,240 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5) internal successors, (78), 51 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 411 [2022-01-31 17:45:23,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:23,241 INFO L225 Difference]: With dead ends: 785 [2022-01-31 17:45:23,241 INFO L226 Difference]: Without dead ends: 424 [2022-01-31 17:45:23,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1224 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3825, Invalid=6275, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:45:23,254 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 1644 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1644 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:23,254 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1644 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:23,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-01-31 17:45:23,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-01-31 17:45:23,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 418 states have (on average 1.0215311004784688) internal successors, (427), 418 states have internal predecessors, (427), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 432 transitions. [2022-01-31 17:45:23,264 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 432 transitions. Word has length 411 [2022-01-31 17:45:23,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:23,264 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 432 transitions. [2022-01-31 17:45:23,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5) internal successors, (78), 51 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:23,264 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 432 transitions. [2022-01-31 17:45:23,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 420 [2022-01-31 17:45:23,265 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:23,266 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:23,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 17:45:23,266 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:23,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:23,266 INFO L85 PathProgramCache]: Analyzing trace with hash -97938137, now seen corresponding path program 49 times [2022-01-31 17:45:23,266 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:23,266 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455110148] [2022-01-31 17:45:23,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:23,267 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:23,267 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:23,267 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:23,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:23,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:24,299 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 17:45:24,299 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:24,299 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455110148] [2022-01-31 17:45:24,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455110148] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:24,299 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:24,299 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 17:45:24,299 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589656091] [2022-01-31 17:45:24,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:24,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 17:45:24,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:24,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 17:45:24,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 17:45:24,301 INFO L87 Difference]: Start difference. First operand 424 states and 432 transitions. Second operand has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:25,706 INFO L93 Difference]: Finished difference Result 800 states and 823 transitions. [2022-01-31 17:45:25,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 17:45:25,706 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 419 [2022-01-31 17:45:25,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:25,708 INFO L225 Difference]: With dead ends: 800 [2022-01-31 17:45:25,708 INFO L226 Difference]: Without dead ends: 432 [2022-01-31 17:45:25,709 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1274 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=3978, Invalid=6528, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:45:25,712 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 524 mSolverCounterSat, 1581 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1581 IncrementalHoareTripleChecker+Valid, 524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:25,712 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 2105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1581 Valid, 524 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:25,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 432 states. [2022-01-31 17:45:25,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 432 to 432. [2022-01-31 17:45:25,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 432 states, 426 states have (on average 1.0211267605633803) internal successors, (435), 426 states have internal predecessors, (435), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:25,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 432 states to 432 states and 440 transitions. [2022-01-31 17:45:25,723 INFO L78 Accepts]: Start accepts. Automaton has 432 states and 440 transitions. Word has length 419 [2022-01-31 17:45:25,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:25,723 INFO L470 AbstractCegarLoop]: Abstraction has 432 states and 440 transitions. [2022-01-31 17:45:25,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.490566037735849) internal successors, (79), 52 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 432 states and 440 transitions. [2022-01-31 17:45:25,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 428 [2022-01-31 17:45:25,724 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:25,725 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:25,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 17:45:25,725 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:25,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash -1553898709, now seen corresponding path program 50 times [2022-01-31 17:45:25,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:25,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1883052729] [2022-01-31 17:45:25,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:25,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:25,731 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:25,731 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:25,744 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:26,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:26,886 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:26,886 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:26,886 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1883052729] [2022-01-31 17:45:26,886 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1883052729] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:26,886 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:26,886 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 17:45:26,886 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069839314] [2022-01-31 17:45:26,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:26,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 17:45:26,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:26,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 17:45:26,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 17:45:26,887 INFO L87 Difference]: Start difference. First operand 432 states and 440 transitions. Second operand has 54 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:28,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:28,895 INFO L93 Difference]: Finished difference Result 815 states and 838 transitions. [2022-01-31 17:45:28,895 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 17:45:28,895 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 427 [2022-01-31 17:45:28,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:28,897 INFO L225 Difference]: With dead ends: 815 [2022-01-31 17:45:28,897 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 17:45:28,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1325 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4134, Invalid=6786, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:45:28,898 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 513 mSolverCounterSat, 1620 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2133 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1620 IncrementalHoareTripleChecker+Valid, 513 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:28,898 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2133 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1620 Valid, 513 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:28,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 17:45:28,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 440. [2022-01-31 17:45:28,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 434 states have (on average 1.0207373271889402) internal successors, (443), 434 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:28,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 448 transitions. [2022-01-31 17:45:28,908 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 448 transitions. Word has length 427 [2022-01-31 17:45:28,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:28,908 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 448 transitions. [2022-01-31 17:45:28,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.4814814814814814) internal successors, (80), 53 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:28,908 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 448 transitions. [2022-01-31 17:45:28,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 436 [2022-01-31 17:45:28,910 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:28,910 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:28,910 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 17:45:28,910 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:28,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:28,910 INFO L85 PathProgramCache]: Analyzing trace with hash -272389209, now seen corresponding path program 51 times [2022-01-31 17:45:28,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:28,910 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592277007] [2022-01-31 17:45:28,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:28,912 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:28,912 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:28,912 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:28,923 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:29,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:29,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:29,911 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:29,911 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592277007] [2022-01-31 17:45:29,911 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592277007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:29,911 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:29,911 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 17:45:29,911 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722340160] [2022-01-31 17:45:29,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:29,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 17:45:29,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:29,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 17:45:29,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 17:45:29,913 INFO L87 Difference]: Start difference. First operand 440 states and 448 transitions. Second operand has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 54 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:31,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:31,615 INFO L93 Difference]: Finished difference Result 830 states and 853 transitions. [2022-01-31 17:45:31,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 17:45:31,616 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 54 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 435 [2022-01-31 17:45:31,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:31,617 INFO L225 Difference]: With dead ends: 830 [2022-01-31 17:45:31,617 INFO L226 Difference]: Without dead ends: 448 [2022-01-31 17:45:31,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1377 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=4293, Invalid=7049, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:45:31,618 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 559 mSolverCounterSat, 1387 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 1946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1387 IncrementalHoareTripleChecker+Valid, 559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:31,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 1946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1387 Valid, 559 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-01-31 17:45:31,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2022-01-31 17:45:31,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 442 states have (on average 1.0203619909502262) internal successors, (451), 442 states have internal predecessors, (451), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:31,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 456 transitions. [2022-01-31 17:45:31,627 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 456 transitions. Word has length 435 [2022-01-31 17:45:31,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:31,627 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 456 transitions. [2022-01-31 17:45:31,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.4727272727272727) internal successors, (81), 54 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:31,627 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 456 transitions. [2022-01-31 17:45:31,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 444 [2022-01-31 17:45:31,629 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:31,629 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:31,629 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 17:45:31,629 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:31,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:31,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1904747947, now seen corresponding path program 52 times [2022-01-31 17:45:31,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:31,629 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1171664593] [2022-01-31 17:45:31,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:31,631 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:31,631 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:31,631 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:31,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:31,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,802 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:32,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:32,805 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:32,805 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:32,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1171664593] [2022-01-31 17:45:32,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1171664593] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:32,805 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:32,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 17:45:32,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904688141] [2022-01-31 17:45:32,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:32,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 17:45:32,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:32,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 17:45:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 17:45:32,807 INFO L87 Difference]: Start difference. First operand 448 states and 456 transitions. Second operand has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 55 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:34,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:34,717 INFO L93 Difference]: Finished difference Result 845 states and 868 transitions. [2022-01-31 17:45:34,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 17:45:34,717 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 55 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 443 [2022-01-31 17:45:34,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:34,719 INFO L225 Difference]: With dead ends: 845 [2022-01-31 17:45:34,719 INFO L226 Difference]: Without dead ends: 456 [2022-01-31 17:45:34,720 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1430 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=4455, Invalid=7317, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:45:34,720 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 1631 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2274 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1631 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:34,720 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 2274 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1631 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:34,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 456 states. [2022-01-31 17:45:34,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 456 to 456. [2022-01-31 17:45:34,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 456 states, 450 states have (on average 1.02) internal successors, (459), 450 states have internal predecessors, (459), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:34,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 456 states to 456 states and 464 transitions. [2022-01-31 17:45:34,731 INFO L78 Accepts]: Start accepts. Automaton has 456 states and 464 transitions. Word has length 443 [2022-01-31 17:45:34,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:34,731 INFO L470 AbstractCegarLoop]: Abstraction has 456 states and 464 transitions. [2022-01-31 17:45:34,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.4642857142857142) internal successors, (82), 55 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:34,732 INFO L276 IsEmpty]: Start isEmpty. Operand 456 states and 464 transitions. [2022-01-31 17:45:34,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 452 [2022-01-31 17:45:34,733 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:34,734 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:34,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 17:45:34,734 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:34,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:34,734 INFO L85 PathProgramCache]: Analyzing trace with hash -192224729, now seen corresponding path program 53 times [2022-01-31 17:45:34,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:34,734 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234344448] [2022-01-31 17:45:34,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:34,735 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:34,735 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:34,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:34,749 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:34,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:35,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:35,519 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:35,519 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234344448] [2022-01-31 17:45:35,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234344448] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:35,519 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:35,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 17:45:35,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757049802] [2022-01-31 17:45:35,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:35,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 17:45:35,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:35,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 17:45:35,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 17:45:35,522 INFO L87 Difference]: Start difference. First operand 456 states and 464 transitions. Second operand has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 56 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:37,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:37,012 INFO L93 Difference]: Finished difference Result 860 states and 883 transitions. [2022-01-31 17:45:37,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 17:45:37,012 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 56 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 451 [2022-01-31 17:45:37,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:37,013 INFO L225 Difference]: With dead ends: 860 [2022-01-31 17:45:37,013 INFO L226 Difference]: Without dead ends: 464 [2022-01-31 17:45:37,014 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1484 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=4620, Invalid=7590, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:45:37,015 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 499 mSolverCounterSat, 1690 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1690 IncrementalHoareTripleChecker+Valid, 499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:37,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 2189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1690 Valid, 499 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:37,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2022-01-31 17:45:37,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 464. [2022-01-31 17:45:37,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 464 states, 458 states have (on average 1.019650655021834) internal successors, (467), 458 states have internal predecessors, (467), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:37,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 464 states to 464 states and 472 transitions. [2022-01-31 17:45:37,024 INFO L78 Accepts]: Start accepts. Automaton has 464 states and 472 transitions. Word has length 451 [2022-01-31 17:45:37,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:37,024 INFO L470 AbstractCegarLoop]: Abstraction has 464 states and 472 transitions. [2022-01-31 17:45:37,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.456140350877193) internal successors, (83), 56 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 464 states and 472 transitions. [2022-01-31 17:45:37,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 460 [2022-01-31 17:45:37,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:37,026 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:37,027 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 17:45:37,027 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:37,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:37,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1903511595, now seen corresponding path program 54 times [2022-01-31 17:45:37,027 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:37,027 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1013970229] [2022-01-31 17:45:37,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:37,028 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:37,028 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:37,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:37,040 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:37,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:38,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:38,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:38,271 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 17:45:38,271 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:38,272 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1013970229] [2022-01-31 17:45:38,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1013970229] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:38,272 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:38,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 17:45:38,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837336428] [2022-01-31 17:45:38,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:38,272 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 17:45:38,272 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:38,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 17:45:38,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 17:45:38,274 INFO L87 Difference]: Start difference. First operand 464 states and 472 transitions. Second operand has 58 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 57 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:40,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:40,540 INFO L93 Difference]: Finished difference Result 875 states and 898 transitions. [2022-01-31 17:45:40,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 17:45:40,541 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 57 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 459 [2022-01-31 17:45:40,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:40,542 INFO L225 Difference]: With dead ends: 875 [2022-01-31 17:45:40,542 INFO L226 Difference]: Without dead ends: 472 [2022-01-31 17:45:40,544 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1539 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=4788, Invalid=7868, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:45:40,545 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 1949 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1949 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:40,545 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 2532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1949 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:45:40,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-01-31 17:45:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 472. [2022-01-31 17:45:40,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 472 states, 466 states have (on average 1.01931330472103) internal successors, (475), 466 states have internal predecessors, (475), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:40,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 472 states to 472 states and 480 transitions. [2022-01-31 17:45:40,554 INFO L78 Accepts]: Start accepts. Automaton has 472 states and 480 transitions. Word has length 459 [2022-01-31 17:45:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:40,554 INFO L470 AbstractCegarLoop]: Abstraction has 472 states and 480 transitions. [2022-01-31 17:45:40,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.4482758620689655) internal successors, (84), 57 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 472 states and 480 transitions. [2022-01-31 17:45:40,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 468 [2022-01-31 17:45:40,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:40,556 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:40,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 17:45:40,556 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:40,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:40,556 INFO L85 PathProgramCache]: Analyzing trace with hash -1742784345, now seen corresponding path program 55 times [2022-01-31 17:45:40,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:40,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048999574] [2022-01-31 17:45:40,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:40,558 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:40,558 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:40,558 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:40,571 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:40,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:41,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:41,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:45:41,907 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:41,907 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048999574] [2022-01-31 17:45:41,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048999574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:41,907 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:41,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 17:45:41,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260286520] [2022-01-31 17:45:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:41,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 17:45:41,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:41,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 17:45:41,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 17:45:41,909 INFO L87 Difference]: Start difference. First operand 472 states and 480 transitions. Second operand has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:43,739 INFO L93 Difference]: Finished difference Result 890 states and 913 transitions. [2022-01-31 17:45:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 17:45:43,740 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 467 [2022-01-31 17:45:43,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:43,741 INFO L225 Difference]: With dead ends: 890 [2022-01-31 17:45:43,741 INFO L226 Difference]: Without dead ends: 480 [2022-01-31 17:45:43,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1595 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=4959, Invalid=8151, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:45:43,742 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 515 mSolverCounterSat, 2351 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2351 IncrementalHoareTripleChecker+Valid, 515 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:43,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 2866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2351 Valid, 515 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:43,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 480 states. [2022-01-31 17:45:43,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 480 to 480. [2022-01-31 17:45:43,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 474 states have (on average 1.018987341772152) internal successors, (483), 474 states have internal predecessors, (483), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:43,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 488 transitions. [2022-01-31 17:45:43,752 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 488 transitions. Word has length 467 [2022-01-31 17:45:43,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:43,752 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 488 transitions. [2022-01-31 17:45:43,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.4406779661016949) internal successors, (85), 58 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:43,752 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 488 transitions. [2022-01-31 17:45:43,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 476 [2022-01-31 17:45:43,754 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:43,754 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:43,754 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 17:45:43,755 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:43,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:43,755 INFO L85 PathProgramCache]: Analyzing trace with hash -267859285, now seen corresponding path program 56 times [2022-01-31 17:45:43,755 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:43,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1820993706] [2022-01-31 17:45:43,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:43,756 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:43,756 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:43,756 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:43,772 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:43,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:44,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:44,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:44,810 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 17:45:44,811 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:44,811 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1820993706] [2022-01-31 17:45:44,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1820993706] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:44,811 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:44,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 17:45:44,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367703335] [2022-01-31 17:45:44,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:44,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 17:45:44,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:44,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 17:45:44,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 17:45:44,812 INFO L87 Difference]: Start difference. First operand 480 states and 488 transitions. Second operand has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 59 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:46,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:46,436 INFO L93 Difference]: Finished difference Result 905 states and 928 transitions. [2022-01-31 17:45:46,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 17:45:46,436 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 59 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 475 [2022-01-31 17:45:46,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:46,438 INFO L225 Difference]: With dead ends: 905 [2022-01-31 17:45:46,438 INFO L226 Difference]: Without dead ends: 488 [2022-01-31 17:45:46,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1652 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=5133, Invalid=8439, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:45:46,439 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 561 mSolverCounterSat, 1808 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1808 IncrementalHoareTripleChecker+Valid, 561 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:46,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1808 Valid, 561 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 17:45:46,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2022-01-31 17:45:46,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 488. [2022-01-31 17:45:46,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 488 states, 482 states have (on average 1.0186721991701244) internal successors, (491), 482 states have internal predecessors, (491), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:46,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 488 states to 488 states and 496 transitions. [2022-01-31 17:45:46,448 INFO L78 Accepts]: Start accepts. Automaton has 488 states and 496 transitions. Word has length 475 [2022-01-31 17:45:46,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:46,448 INFO L470 AbstractCegarLoop]: Abstraction has 488 states and 496 transitions. [2022-01-31 17:45:46,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.4333333333333333) internal successors, (86), 59 states have internal predecessors, (86), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:46,449 INFO L276 IsEmpty]: Start isEmpty. Operand 488 states and 496 transitions. [2022-01-31 17:45:46,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 484 [2022-01-31 17:45:46,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:46,450 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:46,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 17:45:46,450 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:46,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:46,451 INFO L85 PathProgramCache]: Analyzing trace with hash -2011123929, now seen corresponding path program 57 times [2022-01-31 17:45:46,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:46,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [987976231] [2022-01-31 17:45:46,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:46,452 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:46,452 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:46,452 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:46,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:46,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:47,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:47,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:47,386 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 17:45:47,386 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:47,386 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [987976231] [2022-01-31 17:45:47,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [987976231] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:47,387 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:47,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 17:45:47,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638224942] [2022-01-31 17:45:47,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:47,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 17:45:47,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:47,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 17:45:47,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 17:45:47,388 INFO L87 Difference]: Start difference. First operand 488 states and 496 transitions. Second operand has 61 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 60 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:49,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:49,117 INFO L93 Difference]: Finished difference Result 920 states and 943 transitions. [2022-01-31 17:45:49,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 17:45:49,117 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 60 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 483 [2022-01-31 17:45:49,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:49,118 INFO L225 Difference]: With dead ends: 920 [2022-01-31 17:45:49,118 INFO L226 Difference]: Without dead ends: 496 [2022-01-31 17:45:49,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=5310, Invalid=8732, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:45:49,120 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 569 mSolverCounterSat, 2033 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2033 IncrementalHoareTripleChecker+Valid, 569 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:49,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2033 Valid, 569 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:49,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2022-01-31 17:45:49,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 496. [2022-01-31 17:45:49,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 496 states, 490 states have (on average 1.0183673469387755) internal successors, (499), 490 states have internal predecessors, (499), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:49,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 496 states to 496 states and 504 transitions. [2022-01-31 17:45:49,129 INFO L78 Accepts]: Start accepts. Automaton has 496 states and 504 transitions. Word has length 483 [2022-01-31 17:45:49,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:49,129 INFO L470 AbstractCegarLoop]: Abstraction has 496 states and 504 transitions. [2022-01-31 17:45:49,129 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.4262295081967213) internal successors, (87), 60 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:49,129 INFO L276 IsEmpty]: Start isEmpty. Operand 496 states and 504 transitions. [2022-01-31 17:45:49,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 492 [2022-01-31 17:45:49,131 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:49,131 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:49,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 17:45:49,131 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:49,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:49,131 INFO L85 PathProgramCache]: Analyzing trace with hash 1008905515, now seen corresponding path program 58 times [2022-01-31 17:45:49,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:49,132 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235579798] [2022-01-31 17:45:49,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:49,133 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:49,133 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:49,133 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:49,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:49,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:50,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:50,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:50,342 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 17:45:50,342 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:50,342 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235579798] [2022-01-31 17:45:50,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235579798] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:50,342 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:50,342 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 17:45:50,342 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026149766] [2022-01-31 17:45:50,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:50,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 17:45:50,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:50,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 17:45:50,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 17:45:50,344 INFO L87 Difference]: Start difference. First operand 496 states and 504 transitions. Second operand has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 61 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:52,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:52,178 INFO L93 Difference]: Finished difference Result 935 states and 958 transitions. [2022-01-31 17:45:52,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 17:45:52,178 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 61 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 491 [2022-01-31 17:45:52,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:52,179 INFO L225 Difference]: With dead ends: 935 [2022-01-31 17:45:52,179 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 17:45:52,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1769 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=5490, Invalid=9030, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:45:52,181 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 1793 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2389 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1793 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:52,181 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 2389 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1793 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:45:52,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 17:45:52,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 504. [2022-01-31 17:45:52,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 498 states have (on average 1.0180722891566265) internal successors, (507), 498 states have internal predecessors, (507), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:52,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 512 transitions. [2022-01-31 17:45:52,190 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 512 transitions. Word has length 491 [2022-01-31 17:45:52,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:52,190 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 512 transitions. [2022-01-31 17:45:52,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.4193548387096775) internal successors, (88), 61 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:52,190 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 512 transitions. [2022-01-31 17:45:52,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 500 [2022-01-31 17:45:52,192 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:52,192 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:52,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 17:45:52,192 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:52,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:52,192 INFO L85 PathProgramCache]: Analyzing trace with hash -1875950169, now seen corresponding path program 59 times [2022-01-31 17:45:52,192 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:52,192 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [410612899] [2022-01-31 17:45:52,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:52,193 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:52,193 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:52,193 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:52,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:52,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:53,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:53,241 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 17:45:53,241 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:53,241 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [410612899] [2022-01-31 17:45:53,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [410612899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:53,241 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:53,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 17:45:53,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766186284] [2022-01-31 17:45:53,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:53,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 17:45:53,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:53,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 17:45:53,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 17:45:53,244 INFO L87 Difference]: Start difference. First operand 504 states and 512 transitions. Second operand has 63 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:55,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:55,678 INFO L93 Difference]: Finished difference Result 950 states and 973 transitions. [2022-01-31 17:45:55,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 17:45:55,679 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 499 [2022-01-31 17:45:55,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:55,680 INFO L225 Difference]: With dead ends: 950 [2022-01-31 17:45:55,680 INFO L226 Difference]: Without dead ends: 512 [2022-01-31 17:45:55,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1829 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=5673, Invalid=9333, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:45:55,682 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 2070 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2636 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2070 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:55,682 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2636 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2070 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:45:55,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 512 states. [2022-01-31 17:45:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 512 to 512. [2022-01-31 17:45:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 512 states, 506 states have (on average 1.017786561264822) internal successors, (515), 506 states have internal predecessors, (515), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:55,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 512 states to 512 states and 520 transitions. [2022-01-31 17:45:55,693 INFO L78 Accepts]: Start accepts. Automaton has 512 states and 520 transitions. Word has length 499 [2022-01-31 17:45:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:55,693 INFO L470 AbstractCegarLoop]: Abstraction has 512 states and 520 transitions. [2022-01-31 17:45:55,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.4126984126984128) internal successors, (89), 62 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 512 states and 520 transitions. [2022-01-31 17:45:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 508 [2022-01-31 17:45:55,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:55,694 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:55,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 17:45:55,695 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:55,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:55,695 INFO L85 PathProgramCache]: Analyzing trace with hash -1499271253, now seen corresponding path program 60 times [2022-01-31 17:45:55,695 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:55,695 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [754044238] [2022-01-31 17:45:55,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:55,696 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:55,696 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:55,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:55,712 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:55,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:57,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:45:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:45:57,126 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 17:45:57,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:45:57,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [754044238] [2022-01-31 17:45:57,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [754044238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:45:57,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:45:57,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 17:45:57,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399100287] [2022-01-31 17:45:57,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:45:57,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 17:45:57,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:45:57,128 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 17:45:57,128 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 17:45:57,129 INFO L87 Difference]: Start difference. First operand 512 states and 520 transitions. Second operand has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:59,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:45:59,383 INFO L93 Difference]: Finished difference Result 965 states and 988 transitions. [2022-01-31 17:45:59,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 17:45:59,384 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 507 [2022-01-31 17:45:59,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:45:59,385 INFO L225 Difference]: With dead ends: 965 [2022-01-31 17:45:59,385 INFO L226 Difference]: Without dead ends: 520 [2022-01-31 17:45:59,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1890 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=5859, Invalid=9641, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:45:59,386 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 2719 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3312 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2719 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:45:59,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 3312 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2719 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:45:59,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 520 states. [2022-01-31 17:45:59,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 520 to 520. [2022-01-31 17:45:59,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 520 states, 514 states have (on average 1.017509727626459) internal successors, (523), 514 states have internal predecessors, (523), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:45:59,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 520 states to 520 states and 528 transitions. [2022-01-31 17:45:59,396 INFO L78 Accepts]: Start accepts. Automaton has 520 states and 528 transitions. Word has length 507 [2022-01-31 17:45:59,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:45:59,396 INFO L470 AbstractCegarLoop]: Abstraction has 520 states and 528 transitions. [2022-01-31 17:45:59,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.40625) internal successors, (90), 63 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:45:59,397 INFO L276 IsEmpty]: Start isEmpty. Operand 520 states and 528 transitions. [2022-01-31 17:45:59,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 516 [2022-01-31 17:45:59,398 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:45:59,398 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:45:59,398 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 17:45:59,398 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:45:59,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:45:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1712653273, now seen corresponding path program 61 times [2022-01-31 17:45:59,399 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:45:59,399 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741065393] [2022-01-31 17:45:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:45:59,400 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:45:59,400 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:45:59,400 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:45:59,416 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:45:59,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:00,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:00,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:00,717 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 17:46:00,717 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:00,717 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741065393] [2022-01-31 17:46:00,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [741065393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:00,717 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:00,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 17:46:00,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1852193283] [2022-01-31 17:46:00,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:00,718 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 17:46:00,718 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:00,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 17:46:00,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 17:46:00,719 INFO L87 Difference]: Start difference. First operand 520 states and 528 transitions. Second operand has 65 states, 65 states have (on average 1.4) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:02,664 INFO L93 Difference]: Finished difference Result 980 states and 1003 transitions. [2022-01-31 17:46:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 17:46:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.4) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 515 [2022-01-31 17:46:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:02,665 INFO L225 Difference]: With dead ends: 980 [2022-01-31 17:46:02,665 INFO L226 Difference]: Without dead ends: 528 [2022-01-31 17:46:02,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1952 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=6048, Invalid=9954, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:46:02,668 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 544 mSolverCounterSat, 2456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2456 IncrementalHoareTripleChecker+Valid, 544 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:02,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2456 Valid, 544 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:02,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-01-31 17:46:02,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 528. [2022-01-31 17:46:02,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 522 states have (on average 1.0172413793103448) internal successors, (531), 522 states have internal predecessors, (531), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:02,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 536 transitions. [2022-01-31 17:46:02,679 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 536 transitions. Word has length 515 [2022-01-31 17:46:02,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:02,679 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 536 transitions. [2022-01-31 17:46:02,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.4) internal successors, (91), 64 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:02,679 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 536 transitions. [2022-01-31 17:46:02,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 524 [2022-01-31 17:46:02,681 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:02,681 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:02,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 17:46:02,681 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:02,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:02,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2107010517, now seen corresponding path program 62 times [2022-01-31 17:46:02,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:02,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [973163251] [2022-01-31 17:46:02,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:02,683 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:02,683 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:02,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:02,698 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:02,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:03,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:03,727 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 17:46:03,728 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:03,728 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [973163251] [2022-01-31 17:46:03,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [973163251] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:03,728 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:03,728 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 17:46:03,728 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266259676] [2022-01-31 17:46:03,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:03,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 17:46:03,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:03,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 17:46:03,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 17:46:03,729 INFO L87 Difference]: Start difference. First operand 528 states and 536 transitions. Second operand has 66 states, 66 states have (on average 1.393939393939394) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:05,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:05,646 INFO L93 Difference]: Finished difference Result 995 states and 1018 transitions. [2022-01-31 17:46:05,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 17:46:05,647 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.393939393939394) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 523 [2022-01-31 17:46:05,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:05,648 INFO L225 Difference]: With dead ends: 995 [2022-01-31 17:46:05,648 INFO L226 Difference]: Without dead ends: 536 [2022-01-31 17:46:05,650 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2015 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=6240, Invalid=10272, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:46:05,650 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 2155 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2155 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:05,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2155 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:05,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 536 states. [2022-01-31 17:46:05,665 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 536 to 536. [2022-01-31 17:46:05,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 536 states, 530 states have (on average 1.0169811320754718) internal successors, (539), 530 states have internal predecessors, (539), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:05,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 536 states to 536 states and 544 transitions. [2022-01-31 17:46:05,666 INFO L78 Accepts]: Start accepts. Automaton has 536 states and 544 transitions. Word has length 523 [2022-01-31 17:46:05,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:05,666 INFO L470 AbstractCegarLoop]: Abstraction has 536 states and 544 transitions. [2022-01-31 17:46:05,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.393939393939394) internal successors, (92), 65 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:05,666 INFO L276 IsEmpty]: Start isEmpty. Operand 536 states and 544 transitions. [2022-01-31 17:46:05,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2022-01-31 17:46:05,668 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:05,668 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:05,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 17:46:05,668 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:05,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:05,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1393306969, now seen corresponding path program 63 times [2022-01-31 17:46:05,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:05,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [958568999] [2022-01-31 17:46:05,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:05,670 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:05,670 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:05,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:05,686 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:05,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:07,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:07,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:07,194 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 17:46:07,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:07,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [958568999] [2022-01-31 17:46:07,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [958568999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:07,195 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:07,195 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 17:46:07,195 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86870808] [2022-01-31 17:46:07,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:07,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 17:46:07,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:07,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 17:46:07,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 17:46:07,196 INFO L87 Difference]: Start difference. First operand 536 states and 544 transitions. Second operand has 67 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 66 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:10,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:10,106 INFO L93 Difference]: Finished difference Result 1010 states and 1033 transitions. [2022-01-31 17:46:10,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 17:46:10,106 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 66 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 531 [2022-01-31 17:46:10,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:10,107 INFO L225 Difference]: With dead ends: 1010 [2022-01-31 17:46:10,107 INFO L226 Difference]: Without dead ends: 544 [2022-01-31 17:46:10,109 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2079 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6435, Invalid=10595, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:46:10,109 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 598 mSolverCounterSat, 2171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 2769 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2171 IncrementalHoareTripleChecker+Valid, 598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:10,109 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 2769 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2171 Valid, 598 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:10,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 544 states. [2022-01-31 17:46:10,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 544 to 544. [2022-01-31 17:46:10,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 538 states have (on average 1.016728624535316) internal successors, (547), 538 states have internal predecessors, (547), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:10,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 552 transitions. [2022-01-31 17:46:10,120 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 552 transitions. Word has length 531 [2022-01-31 17:46:10,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:10,120 INFO L470 AbstractCegarLoop]: Abstraction has 544 states and 552 transitions. [2022-01-31 17:46:10,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.3880597014925373) internal successors, (93), 66 states have internal predecessors, (93), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:10,120 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 552 transitions. [2022-01-31 17:46:10,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 540 [2022-01-31 17:46:10,122 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:10,122 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:10,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 17:46:10,122 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:10,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:10,122 INFO L85 PathProgramCache]: Analyzing trace with hash 609653931, now seen corresponding path program 64 times [2022-01-31 17:46:10,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:10,122 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [263233218] [2022-01-31 17:46:10,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:10,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:10,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:10,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:10,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:10,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:11,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:11,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:11,864 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:11,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [263233218] [2022-01-31 17:46:11,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [263233218] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:11,864 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:11,864 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 17:46:11,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121288287] [2022-01-31 17:46:11,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:11,865 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 17:46:11,865 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:11,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 17:46:11,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 17:46:11,866 INFO L87 Difference]: Start difference. First operand 544 states and 552 transitions. Second operand has 68 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 67 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:14,660 INFO L93 Difference]: Finished difference Result 1025 states and 1048 transitions. [2022-01-31 17:46:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 17:46:14,661 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 67 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 539 [2022-01-31 17:46:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:14,662 INFO L225 Difference]: With dead ends: 1025 [2022-01-31 17:46:14,662 INFO L226 Difference]: Without dead ends: 552 [2022-01-31 17:46:14,664 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2144 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6633, Invalid=10923, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:46:14,669 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 663 mSolverCounterSat, 1917 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1917 IncrementalHoareTripleChecker+Valid, 663 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:14,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1917 Valid, 663 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:14,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2022-01-31 17:46:14,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 552. [2022-01-31 17:46:14,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 552 states, 546 states have (on average 1.0164835164835164) internal successors, (555), 546 states have internal predecessors, (555), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:14,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 552 states to 552 states and 560 transitions. [2022-01-31 17:46:14,683 INFO L78 Accepts]: Start accepts. Automaton has 552 states and 560 transitions. Word has length 539 [2022-01-31 17:46:14,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:14,683 INFO L470 AbstractCegarLoop]: Abstraction has 552 states and 560 transitions. [2022-01-31 17:46:14,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.3823529411764706) internal successors, (94), 67 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:14,683 INFO L276 IsEmpty]: Start isEmpty. Operand 552 states and 560 transitions. [2022-01-31 17:46:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 548 [2022-01-31 17:46:14,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:14,685 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:14,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 17:46:14,685 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:14,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:14,686 INFO L85 PathProgramCache]: Analyzing trace with hash -286668505, now seen corresponding path program 65 times [2022-01-31 17:46:14,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:14,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [43569061] [2022-01-31 17:46:14,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:14,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:14,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:14,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:14,716 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:14,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:16,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:16,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:16,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:16,177 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:16,177 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [43569061] [2022-01-31 17:46:16,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [43569061] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:16,177 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:16,178 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 17:46:16,178 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424969128] [2022-01-31 17:46:16,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:16,178 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 17:46:16,178 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:16,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 17:46:16,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 17:46:16,179 INFO L87 Difference]: Start difference. First operand 552 states and 560 transitions. Second operand has 69 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 68 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:19,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:19,188 INFO L93 Difference]: Finished difference Result 1040 states and 1063 transitions. [2022-01-31 17:46:19,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 17:46:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 68 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 547 [2022-01-31 17:46:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:19,189 INFO L225 Difference]: With dead ends: 1040 [2022-01-31 17:46:19,190 INFO L226 Difference]: Without dead ends: 560 [2022-01-31 17:46:19,191 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2210 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=6834, Invalid=11256, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:46:19,191 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 2297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 2892 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2297 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:19,191 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 2892 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2297 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:46:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 560 states. [2022-01-31 17:46:19,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 560 to 560. [2022-01-31 17:46:19,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 560 states, 554 states have (on average 1.016245487364621) internal successors, (563), 554 states have internal predecessors, (563), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:19,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 560 states to 560 states and 568 transitions. [2022-01-31 17:46:19,201 INFO L78 Accepts]: Start accepts. Automaton has 560 states and 568 transitions. Word has length 547 [2022-01-31 17:46:19,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:19,201 INFO L470 AbstractCegarLoop]: Abstraction has 560 states and 568 transitions. [2022-01-31 17:46:19,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.3768115942028984) internal successors, (95), 68 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:19,201 INFO L276 IsEmpty]: Start isEmpty. Operand 560 states and 568 transitions. [2022-01-31 17:46:19,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 556 [2022-01-31 17:46:19,203 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:19,203 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:19,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 17:46:19,203 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:19,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:19,204 INFO L85 PathProgramCache]: Analyzing trace with hash -481691861, now seen corresponding path program 66 times [2022-01-31 17:46:19,204 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:19,204 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790718259] [2022-01-31 17:46:19,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:19,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:19,205 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:19,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:19,222 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:19,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:20,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:20,861 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 17:46:20,861 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:20,861 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790718259] [2022-01-31 17:46:20,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790718259] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:20,861 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:20,861 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 17:46:20,861 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752157630] [2022-01-31 17:46:20,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:20,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-01-31 17:46:20,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:20,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-01-31 17:46:20,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=2482, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 17:46:20,863 INFO L87 Difference]: Start difference. First operand 560 states and 568 transitions. Second operand has 70 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 69 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:22,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:22,941 INFO L93 Difference]: Finished difference Result 1055 states and 1078 transitions. [2022-01-31 17:46:22,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 17:46:22,941 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 69 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 555 [2022-01-31 17:46:22,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:22,943 INFO L225 Difference]: With dead ends: 1055 [2022-01-31 17:46:22,943 INFO L226 Difference]: Without dead ends: 568 [2022-01-31 17:46:22,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2277 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=7038, Invalid=11594, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:46:22,944 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 622 mSolverCounterSat, 2548 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2548 IncrementalHoareTripleChecker+Valid, 622 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:22,944 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2548 Valid, 622 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:22,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 568 states. [2022-01-31 17:46:22,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 568 to 568. [2022-01-31 17:46:22,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 562 states have (on average 1.0160142348754448) internal successors, (571), 562 states have internal predecessors, (571), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:22,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 576 transitions. [2022-01-31 17:46:22,957 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 576 transitions. Word has length 555 [2022-01-31 17:46:22,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:22,957 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 576 transitions. [2022-01-31 17:46:22,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.3714285714285714) internal successors, (96), 69 states have internal predecessors, (96), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:22,958 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 576 transitions. [2022-01-31 17:46:22,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 564 [2022-01-31 17:46:22,959 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:22,960 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:22,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 17:46:22,960 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:22,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:22,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1553145945, now seen corresponding path program 67 times [2022-01-31 17:46:22,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:22,960 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [215817095] [2022-01-31 17:46:22,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:22,961 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:22,961 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:22,961 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:22,978 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:23,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:24,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:24,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:24,139 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 17:46:24,139 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:24,139 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [215817095] [2022-01-31 17:46:24,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [215817095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:24,139 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:24,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 17:46:24,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240459414] [2022-01-31 17:46:24,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:24,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 17:46:24,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:24,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 17:46:24,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 17:46:24,140 INFO L87 Difference]: Start difference. First operand 568 states and 576 transitions. Second operand has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 70 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:26,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:26,241 INFO L93 Difference]: Finished difference Result 1070 states and 1093 transitions. [2022-01-31 17:46:26,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 17:46:26,241 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 70 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 563 [2022-01-31 17:46:26,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:26,242 INFO L225 Difference]: With dead ends: 1070 [2022-01-31 17:46:26,242 INFO L226 Difference]: Without dead ends: 576 [2022-01-31 17:46:26,243 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2345 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=7245, Invalid=11937, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:46:26,243 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 649 mSolverCounterSat, 2189 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 2838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2189 IncrementalHoareTripleChecker+Valid, 649 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:26,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 2838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2189 Valid, 649 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 17:46:26,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 576 states. [2022-01-31 17:46:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 576 to 576. [2022-01-31 17:46:26,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 576 states, 570 states have (on average 1.0157894736842106) internal successors, (579), 570 states have internal predecessors, (579), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:26,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 576 states to 576 states and 584 transitions. [2022-01-31 17:46:26,253 INFO L78 Accepts]: Start accepts. Automaton has 576 states and 584 transitions. Word has length 563 [2022-01-31 17:46:26,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:26,253 INFO L470 AbstractCegarLoop]: Abstraction has 576 states and 584 transitions. [2022-01-31 17:46:26,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.3661971830985915) internal successors, (97), 70 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:26,254 INFO L276 IsEmpty]: Start isEmpty. Operand 576 states and 584 transitions. [2022-01-31 17:46:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 572 [2022-01-31 17:46:26,255 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:26,255 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:26,255 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 17:46:26,256 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:26,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:26,256 INFO L85 PathProgramCache]: Analyzing trace with hash 404994475, now seen corresponding path program 68 times [2022-01-31 17:46:26,256 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:26,256 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1710498006] [2022-01-31 17:46:26,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:26,257 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:26,257 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:26,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:26,273 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:26,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:27,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:27,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:27,858 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:27,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1710498006] [2022-01-31 17:46:27,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1710498006] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:27,858 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:27,858 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 17:46:27,858 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686532418] [2022-01-31 17:46:27,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:27,859 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 17:46:27,859 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 17:46:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 17:46:27,860 INFO L87 Difference]: Start difference. First operand 576 states and 584 transitions. Second operand has 72 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 71 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:30,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:30,719 INFO L93 Difference]: Finished difference Result 1085 states and 1108 transitions. [2022-01-31 17:46:30,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 17:46:30,719 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 71 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 571 [2022-01-31 17:46:30,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:30,721 INFO L225 Difference]: With dead ends: 1085 [2022-01-31 17:46:30,721 INFO L226 Difference]: Without dead ends: 584 [2022-01-31 17:46:30,722 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2414 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=7455, Invalid=12285, Unknown=0, NotChecked=0, Total=19740 [2022-01-31 17:46:30,722 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 676 mSolverCounterSat, 2264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 2940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2264 IncrementalHoareTripleChecker+Valid, 676 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:30,722 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 2940 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2264 Valid, 676 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:30,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-01-31 17:46:30,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 584. [2022-01-31 17:46:30,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 578 states have (on average 1.0155709342560553) internal successors, (587), 578 states have internal predecessors, (587), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:30,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 592 transitions. [2022-01-31 17:46:30,732 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 592 transitions. Word has length 571 [2022-01-31 17:46:30,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:30,732 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 592 transitions. [2022-01-31 17:46:30,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.3611111111111112) internal successors, (98), 71 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:30,732 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 592 transitions. [2022-01-31 17:46:30,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 580 [2022-01-31 17:46:30,734 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:30,734 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:30,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 17:46:30,735 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:30,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:30,735 INFO L85 PathProgramCache]: Analyzing trace with hash 740103719, now seen corresponding path program 69 times [2022-01-31 17:46:30,735 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:30,735 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [744396022] [2022-01-31 17:46:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:30,736 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:30,736 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:30,736 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:30,756 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:30,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:32,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:32,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:32,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:32,348 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:32,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [744396022] [2022-01-31 17:46:32,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [744396022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:32,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:32,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 17:46:32,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [218792880] [2022-01-31 17:46:32,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:32,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 17:46:32,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:32,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 17:46:32,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 17:46:32,350 INFO L87 Difference]: Start difference. First operand 584 states and 592 transitions. Second operand has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:34,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:34,680 INFO L93 Difference]: Finished difference Result 1100 states and 1123 transitions. [2022-01-31 17:46:34,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 17:46:34,681 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 579 [2022-01-31 17:46:34,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:34,682 INFO L225 Difference]: With dead ends: 1100 [2022-01-31 17:46:34,682 INFO L226 Difference]: Without dead ends: 592 [2022-01-31 17:46:34,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=7668, Invalid=12638, Unknown=0, NotChecked=0, Total=20306 [2022-01-31 17:46:34,683 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 627 mSolverCounterSat, 2392 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2392 IncrementalHoareTripleChecker+Valid, 627 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:34,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2392 Valid, 627 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:34,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 592 states. [2022-01-31 17:46:34,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 592 to 592. [2022-01-31 17:46:34,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 592 states, 586 states have (on average 1.015358361774744) internal successors, (595), 586 states have internal predecessors, (595), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:34,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 592 states to 592 states and 600 transitions. [2022-01-31 17:46:34,693 INFO L78 Accepts]: Start accepts. Automaton has 592 states and 600 transitions. Word has length 579 [2022-01-31 17:46:34,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:34,694 INFO L470 AbstractCegarLoop]: Abstraction has 592 states and 600 transitions. [2022-01-31 17:46:34,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.356164383561644) internal successors, (99), 72 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:34,694 INFO L276 IsEmpty]: Start isEmpty. Operand 592 states and 600 transitions. [2022-01-31 17:46:34,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 588 [2022-01-31 17:46:34,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:34,696 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:34,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 17:46:34,696 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:34,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:34,696 INFO L85 PathProgramCache]: Analyzing trace with hash 499375147, now seen corresponding path program 70 times [2022-01-31 17:46:34,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:34,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2103295872] [2022-01-31 17:46:34,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:34,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:34,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:34,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:34,717 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:34,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:36,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:36,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:36,629 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 17:46:36,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:36,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2103295872] [2022-01-31 17:46:36,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2103295872] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:36,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:36,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 17:46:36,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393388397] [2022-01-31 17:46:36,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:36,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 17:46:36,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:36,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 17:46:36,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 17:46:36,631 INFO L87 Difference]: Start difference. First operand 592 states and 600 transitions. Second operand has 74 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 73 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:39,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:39,631 INFO L93 Difference]: Finished difference Result 1115 states and 1138 transitions. [2022-01-31 17:46:39,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 17:46:39,632 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 73 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 587 [2022-01-31 17:46:39,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:39,634 INFO L225 Difference]: With dead ends: 1115 [2022-01-31 17:46:39,634 INFO L226 Difference]: Without dead ends: 600 [2022-01-31 17:46:39,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2555 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=7884, Invalid=12996, Unknown=0, NotChecked=0, Total=20880 [2022-01-31 17:46:39,636 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 692 mSolverCounterSat, 2393 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3085 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2393 IncrementalHoareTripleChecker+Valid, 692 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:39,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 3085 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2393 Valid, 692 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:39,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 600 states. [2022-01-31 17:46:39,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 600 to 600. [2022-01-31 17:46:39,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 600 states, 594 states have (on average 1.0151515151515151) internal successors, (603), 594 states have internal predecessors, (603), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:39,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 600 states to 600 states and 608 transitions. [2022-01-31 17:46:39,647 INFO L78 Accepts]: Start accepts. Automaton has 600 states and 608 transitions. Word has length 587 [2022-01-31 17:46:39,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:39,647 INFO L470 AbstractCegarLoop]: Abstraction has 600 states and 608 transitions. [2022-01-31 17:46:39,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.3513513513513513) internal successors, (100), 73 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:39,647 INFO L276 IsEmpty]: Start isEmpty. Operand 600 states and 608 transitions. [2022-01-31 17:46:39,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 596 [2022-01-31 17:46:39,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:39,649 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:39,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 17:46:39,649 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:39,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:39,649 INFO L85 PathProgramCache]: Analyzing trace with hash 144338087, now seen corresponding path program 71 times [2022-01-31 17:46:39,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:39,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [12923624] [2022-01-31 17:46:39,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:39,650 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:39,650 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:39,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:39,671 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:39,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:41,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:41,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:41,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:41,553 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:41,553 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [12923624] [2022-01-31 17:46:41,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [12923624] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:41,553 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:41,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 17:46:41,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869628851] [2022-01-31 17:46:41,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:41,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 17:46:41,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 17:46:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 17:46:41,555 INFO L87 Difference]: Start difference. First operand 600 states and 608 transitions. Second operand has 75 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 74 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:44,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:44,485 INFO L93 Difference]: Finished difference Result 1130 states and 1153 transitions. [2022-01-31 17:46:44,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 17:46:44,486 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 74 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 595 [2022-01-31 17:46:44,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:44,487 INFO L225 Difference]: With dead ends: 1130 [2022-01-31 17:46:44,487 INFO L226 Difference]: Without dead ends: 608 [2022-01-31 17:46:44,488 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2627 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=8103, Invalid=13359, Unknown=0, NotChecked=0, Total=21462 [2022-01-31 17:46:44,489 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 643 mSolverCounterSat, 2743 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2743 IncrementalHoareTripleChecker+Valid, 643 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:44,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2743 Valid, 643 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:46:44,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 608 states. [2022-01-31 17:46:44,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 608 to 608. [2022-01-31 17:46:44,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 602 states have (on average 1.0149501661129567) internal successors, (611), 602 states have internal predecessors, (611), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:44,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 616 transitions. [2022-01-31 17:46:44,499 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 616 transitions. Word has length 595 [2022-01-31 17:46:44,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:44,499 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 616 transitions. [2022-01-31 17:46:44,499 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 74 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:44,499 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 616 transitions. [2022-01-31 17:46:44,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 604 [2022-01-31 17:46:44,501 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:44,501 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:44,501 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 17:46:44,502 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:44,502 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:44,502 INFO L85 PathProgramCache]: Analyzing trace with hash 1359634091, now seen corresponding path program 72 times [2022-01-31 17:46:44,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:44,502 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1926892876] [2022-01-31 17:46:44,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:44,503 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:44,503 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:44,503 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:44,536 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:44,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:45,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:45,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:45,820 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 17:46:45,820 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:45,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1926892876] [2022-01-31 17:46:45,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1926892876] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:45,821 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:45,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 17:46:45,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692215616] [2022-01-31 17:46:45,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:45,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 17:46:45,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:45,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 17:46:45,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 17:46:45,822 INFO L87 Difference]: Start difference. First operand 608 states and 616 transitions. Second operand has 76 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 75 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:48,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:48,293 INFO L93 Difference]: Finished difference Result 1145 states and 1168 transitions. [2022-01-31 17:46:48,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 17:46:48,293 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 75 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 603 [2022-01-31 17:46:48,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:48,295 INFO L225 Difference]: With dead ends: 1145 [2022-01-31 17:46:48,295 INFO L226 Difference]: Without dead ends: 616 [2022-01-31 17:46:48,296 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2700 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=8325, Invalid=13727, Unknown=0, NotChecked=0, Total=22052 [2022-01-31 17:46:48,296 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 708 mSolverCounterSat, 2613 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2613 IncrementalHoareTripleChecker+Valid, 708 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:48,296 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 3321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2613 Valid, 708 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:48,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 616 states. [2022-01-31 17:46:48,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 616 to 616. [2022-01-31 17:46:48,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 616 states, 610 states have (on average 1.0147540983606558) internal successors, (619), 610 states have internal predecessors, (619), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:48,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 616 states to 616 states and 624 transitions. [2022-01-31 17:46:48,307 INFO L78 Accepts]: Start accepts. Automaton has 616 states and 624 transitions. Word has length 603 [2022-01-31 17:46:48,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:48,307 INFO L470 AbstractCegarLoop]: Abstraction has 616 states and 624 transitions. [2022-01-31 17:46:48,308 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.3421052631578947) internal successors, (102), 75 states have internal predecessors, (102), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:48,308 INFO L276 IsEmpty]: Start isEmpty. Operand 616 states and 624 transitions. [2022-01-31 17:46:48,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 612 [2022-01-31 17:46:48,309 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:48,310 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:48,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 17:46:48,310 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:48,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:48,310 INFO L85 PathProgramCache]: Analyzing trace with hash -695934169, now seen corresponding path program 73 times [2022-01-31 17:46:48,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:48,310 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1591150753] [2022-01-31 17:46:48,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:48,311 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:48,311 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:48,311 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:48,334 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:48,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:50,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:50,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:50,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:50,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1591150753] [2022-01-31 17:46:50,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1591150753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:50,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:50,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 17:46:50,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770221690] [2022-01-31 17:46:50,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:50,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 17:46:50,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:50,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 17:46:50,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 17:46:50,404 INFO L87 Difference]: Start difference. First operand 616 states and 624 transitions. Second operand has 77 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 76 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:52,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:52,964 INFO L93 Difference]: Finished difference Result 1160 states and 1183 transitions. [2022-01-31 17:46:52,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 17:46:52,964 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 76 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 611 [2022-01-31 17:46:52,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:52,966 INFO L225 Difference]: With dead ends: 1160 [2022-01-31 17:46:52,966 INFO L226 Difference]: Without dead ends: 624 [2022-01-31 17:46:52,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2774 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=8550, Invalid=14100, Unknown=0, NotChecked=0, Total=22650 [2022-01-31 17:46:52,967 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 2827 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3486 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2827 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:52,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3486 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2827 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:52,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 624 states. [2022-01-31 17:46:52,978 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 624 to 624. [2022-01-31 17:46:52,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 624 states, 618 states have (on average 1.0145631067961165) internal successors, (627), 618 states have internal predecessors, (627), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:52,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 624 states to 624 states and 632 transitions. [2022-01-31 17:46:52,978 INFO L78 Accepts]: Start accepts. Automaton has 624 states and 632 transitions. Word has length 611 [2022-01-31 17:46:52,979 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:52,979 INFO L470 AbstractCegarLoop]: Abstraction has 624 states and 632 transitions. [2022-01-31 17:46:52,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.3376623376623376) internal successors, (103), 76 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:52,979 INFO L276 IsEmpty]: Start isEmpty. Operand 624 states and 632 transitions. [2022-01-31 17:46:52,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 620 [2022-01-31 17:46:52,981 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:52,981 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:52,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 17:46:52,981 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:52,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:52,982 INFO L85 PathProgramCache]: Analyzing trace with hash 282542379, now seen corresponding path program 74 times [2022-01-31 17:46:52,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:52,982 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2053976500] [2022-01-31 17:46:52,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:52,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:52,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:52,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:53,006 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:53,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:55,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:55,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:55,108 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 17:46:55,108 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:55,108 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2053976500] [2022-01-31 17:46:55,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2053976500] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:55,108 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:55,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 17:46:55,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104922636] [2022-01-31 17:46:55,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:55,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 17:46:55,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:55,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 17:46:55,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 17:46:55,110 INFO L87 Difference]: Start difference. First operand 624 states and 632 transitions. Second operand has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 77 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:46:58,147 INFO L93 Difference]: Finished difference Result 1175 states and 1198 transitions. [2022-01-31 17:46:58,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 17:46:58,147 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 77 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 619 [2022-01-31 17:46:58,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:46:58,149 INFO L225 Difference]: With dead ends: 1175 [2022-01-31 17:46:58,149 INFO L226 Difference]: Without dead ends: 632 [2022-01-31 17:46:58,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2849 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=8778, Invalid=14478, Unknown=0, NotChecked=0, Total=23256 [2022-01-31 17:46:58,151 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 2454 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 3216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2454 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:46:58,151 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 3216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2454 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:46:58,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 632 states. [2022-01-31 17:46:58,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 632 to 632. [2022-01-31 17:46:58,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 632 states, 626 states have (on average 1.0143769968051117) internal successors, (635), 626 states have internal predecessors, (635), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:46:58,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 632 states to 632 states and 640 transitions. [2022-01-31 17:46:58,162 INFO L78 Accepts]: Start accepts. Automaton has 632 states and 640 transitions. Word has length 619 [2022-01-31 17:46:58,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:46:58,162 INFO L470 AbstractCegarLoop]: Abstraction has 632 states and 640 transitions. [2022-01-31 17:46:58,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.3333333333333333) internal successors, (104), 77 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:46:58,162 INFO L276 IsEmpty]: Start isEmpty. Operand 632 states and 640 transitions. [2022-01-31 17:46:58,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 628 [2022-01-31 17:46:58,164 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:46:58,165 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:46:58,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 17:46:58,165 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:46:58,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:46:58,165 INFO L85 PathProgramCache]: Analyzing trace with hash 1367112103, now seen corresponding path program 75 times [2022-01-31 17:46:58,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:46:58,165 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2061521852] [2022-01-31 17:46:58,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:46:58,166 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:46:58,166 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:46:58,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:46:58,193 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:46:58,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:46:59,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:46:59,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:46:59,791 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:46:59,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2061521852] [2022-01-31 17:46:59,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2061521852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:46:59,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:46:59,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 17:46:59,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209036875] [2022-01-31 17:46:59,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:46:59,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 17:46:59,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:46:59,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 17:46:59,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 17:46:59,807 INFO L87 Difference]: Start difference. First operand 632 states and 640 transitions. Second operand has 79 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 78 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:02,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:02,501 INFO L93 Difference]: Finished difference Result 1190 states and 1213 transitions. [2022-01-31 17:47:02,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 17:47:02,501 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 78 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 627 [2022-01-31 17:47:02,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:02,502 INFO L225 Difference]: With dead ends: 1190 [2022-01-31 17:47:02,502 INFO L226 Difference]: Without dead ends: 640 [2022-01-31 17:47:02,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=9009, Invalid=14861, Unknown=0, NotChecked=0, Total=23870 [2022-01-31 17:47:02,504 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 656 mSolverCounterSat, 2861 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 3517 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2861 IncrementalHoareTripleChecker+Valid, 656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:02,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 3517 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2861 Valid, 656 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:02,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2022-01-31 17:47:02,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 640. [2022-01-31 17:47:02,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 640 states, 634 states have (on average 1.0141955835962144) internal successors, (643), 634 states have internal predecessors, (643), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:02,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 640 states to 640 states and 648 transitions. [2022-01-31 17:47:02,516 INFO L78 Accepts]: Start accepts. Automaton has 640 states and 648 transitions. Word has length 627 [2022-01-31 17:47:02,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:02,517 INFO L470 AbstractCegarLoop]: Abstraction has 640 states and 648 transitions. [2022-01-31 17:47:02,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.3291139240506329) internal successors, (105), 78 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:02,517 INFO L276 IsEmpty]: Start isEmpty. Operand 640 states and 648 transitions. [2022-01-31 17:47:02,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 636 [2022-01-31 17:47:02,519 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:02,519 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:02,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 17:47:02,519 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:02,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:02,519 INFO L85 PathProgramCache]: Analyzing trace with hash -1106607189, now seen corresponding path program 76 times [2022-01-31 17:47:02,519 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:02,520 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [666697899] [2022-01-31 17:47:02,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:02,521 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:02,521 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:02,521 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:02,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:02,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:04,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:04,194 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 17:47:04,194 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:04,194 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [666697899] [2022-01-31 17:47:04,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [666697899] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:04,194 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:04,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 17:47:04,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440915922] [2022-01-31 17:47:04,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:04,195 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 17:47:04,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:04,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 17:47:04,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 17:47:04,196 INFO L87 Difference]: Start difference. First operand 640 states and 648 transitions. Second operand has 80 states, 80 states have (on average 1.325) internal successors, (106), 79 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:07,015 INFO L93 Difference]: Finished difference Result 1205 states and 1228 transitions. [2022-01-31 17:47:07,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 17:47:07,016 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.325) internal successors, (106), 79 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 635 [2022-01-31 17:47:07,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:07,017 INFO L225 Difference]: With dead ends: 1205 [2022-01-31 17:47:07,017 INFO L226 Difference]: Without dead ends: 648 [2022-01-31 17:47:07,018 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3002 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=9243, Invalid=15249, Unknown=0, NotChecked=0, Total=24492 [2022-01-31 17:47:07,019 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 702 mSolverCounterSat, 2961 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3663 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2961 IncrementalHoareTripleChecker+Valid, 702 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:07,019 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3663 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2961 Valid, 702 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:07,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2022-01-31 17:47:07,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 648. [2022-01-31 17:47:07,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 648 states, 642 states have (on average 1.014018691588785) internal successors, (651), 642 states have internal predecessors, (651), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:07,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 648 states to 648 states and 656 transitions. [2022-01-31 17:47:07,031 INFO L78 Accepts]: Start accepts. Automaton has 648 states and 656 transitions. Word has length 635 [2022-01-31 17:47:07,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:07,031 INFO L470 AbstractCegarLoop]: Abstraction has 648 states and 656 transitions. [2022-01-31 17:47:07,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.325) internal successors, (106), 79 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:07,031 INFO L276 IsEmpty]: Start isEmpty. Operand 648 states and 656 transitions. [2022-01-31 17:47:07,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 644 [2022-01-31 17:47:07,033 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:07,033 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:07,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 17:47:07,033 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:07,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:07,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1394683943, now seen corresponding path program 77 times [2022-01-31 17:47:07,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:07,034 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [476231986] [2022-01-31 17:47:07,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:07,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:07,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:07,035 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:07,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:07,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:09,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:09,211 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 17:47:09,212 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:09,212 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [476231986] [2022-01-31 17:47:09,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [476231986] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:09,212 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:09,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 17:47:09,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647210360] [2022-01-31 17:47:09,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:09,212 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 17:47:09,212 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:09,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 17:47:09,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 17:47:09,214 INFO L87 Difference]: Start difference. First operand 648 states and 656 transitions. Second operand has 81 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 80 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:12,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:12,428 INFO L93 Difference]: Finished difference Result 1220 states and 1243 transitions. [2022-01-31 17:47:12,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 17:47:12,428 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 80 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 643 [2022-01-31 17:47:12,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:12,429 INFO L225 Difference]: With dead ends: 1220 [2022-01-31 17:47:12,430 INFO L226 Difference]: Without dead ends: 656 [2022-01-31 17:47:12,433 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3080 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=9480, Invalid=15642, Unknown=0, NotChecked=0, Total=25122 [2022-01-31 17:47:12,433 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 710 mSolverCounterSat, 2533 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2533 IncrementalHoareTripleChecker+Valid, 710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:12,433 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2533 Valid, 710 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:47:12,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 656 states. [2022-01-31 17:47:12,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 656 to 656. [2022-01-31 17:47:12,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 656 states, 650 states have (on average 1.0138461538461538) internal successors, (659), 650 states have internal predecessors, (659), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:12,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 656 states to 656 states and 664 transitions. [2022-01-31 17:47:12,445 INFO L78 Accepts]: Start accepts. Automaton has 656 states and 664 transitions. Word has length 643 [2022-01-31 17:47:12,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:12,445 INFO L470 AbstractCegarLoop]: Abstraction has 656 states and 664 transitions. [2022-01-31 17:47:12,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 80 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:12,445 INFO L276 IsEmpty]: Start isEmpty. Operand 656 states and 664 transitions. [2022-01-31 17:47:12,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 652 [2022-01-31 17:47:12,447 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:12,447 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:12,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 17:47:12,447 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:12,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:12,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1148967381, now seen corresponding path program 78 times [2022-01-31 17:47:12,448 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:12,448 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242953952] [2022-01-31 17:47:12,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:12,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:12,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:12,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:12,473 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:12,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:14,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:14,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:14,715 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:14,715 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242953952] [2022-01-31 17:47:14,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242953952] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:14,715 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:14,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 17:47:14,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [386715406] [2022-01-31 17:47:14,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:14,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 17:47:14,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:14,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 17:47:14,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 17:47:14,717 INFO L87 Difference]: Start difference. First operand 656 states and 664 transitions. Second operand has 82 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 81 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:17,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:17,947 INFO L93 Difference]: Finished difference Result 1235 states and 1258 transitions. [2022-01-31 17:47:17,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 17:47:17,947 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 81 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 651 [2022-01-31 17:47:17,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:17,948 INFO L225 Difference]: With dead ends: 1235 [2022-01-31 17:47:17,948 INFO L226 Difference]: Without dead ends: 664 [2022-01-31 17:47:17,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3159 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=9720, Invalid=16040, Unknown=0, NotChecked=0, Total=25760 [2022-01-31 17:47:17,950 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 737 mSolverCounterSat, 2684 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3421 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2684 IncrementalHoareTripleChecker+Valid, 737 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:17,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 3421 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2684 Valid, 737 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 17:47:17,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 664 states. [2022-01-31 17:47:17,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 664 to 664. [2022-01-31 17:47:17,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 664 states, 658 states have (on average 1.013677811550152) internal successors, (667), 658 states have internal predecessors, (667), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:17,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 664 states to 664 states and 672 transitions. [2022-01-31 17:47:17,962 INFO L78 Accepts]: Start accepts. Automaton has 664 states and 672 transitions. Word has length 651 [2022-01-31 17:47:17,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:17,962 INFO L470 AbstractCegarLoop]: Abstraction has 664 states and 672 transitions. [2022-01-31 17:47:17,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.3170731707317074) internal successors, (108), 81 states have internal predecessors, (108), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:17,963 INFO L276 IsEmpty]: Start isEmpty. Operand 664 states and 672 transitions. [2022-01-31 17:47:17,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 660 [2022-01-31 17:47:17,965 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:17,965 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:17,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 17:47:17,965 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:17,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:17,965 INFO L85 PathProgramCache]: Analyzing trace with hash -753727833, now seen corresponding path program 79 times [2022-01-31 17:47:17,965 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:17,966 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302892823] [2022-01-31 17:47:17,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:17,967 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:17,967 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:17,967 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:17,997 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:18,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:20,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:20,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:20,402 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:20,402 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302892823] [2022-01-31 17:47:20,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302892823] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:20,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:20,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 17:47:20,403 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028487102] [2022-01-31 17:47:20,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:20,403 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 17:47:20,403 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:20,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 17:47:20,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 17:47:20,405 INFO L87 Difference]: Start difference. First operand 664 states and 672 transitions. Second operand has 83 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:24,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:24,738 INFO L93 Difference]: Finished difference Result 1250 states and 1273 transitions. [2022-01-31 17:47:24,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 17:47:24,738 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 659 [2022-01-31 17:47:24,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:24,740 INFO L225 Difference]: With dead ends: 1250 [2022-01-31 17:47:24,740 INFO L226 Difference]: Without dead ends: 672 [2022-01-31 17:47:24,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3239 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9963, Invalid=16443, Unknown=0, NotChecked=0, Total=26406 [2022-01-31 17:47:24,742 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 707 mSolverCounterSat, 3263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 3970 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3263 IncrementalHoareTripleChecker+Valid, 707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:24,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 3970 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3263 Valid, 707 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:47:24,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 672 states. [2022-01-31 17:47:24,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 672 to 672. [2022-01-31 17:47:24,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 672 states, 666 states have (on average 1.0135135135135136) internal successors, (675), 666 states have internal predecessors, (675), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:24,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 672 states to 672 states and 680 transitions. [2022-01-31 17:47:24,754 INFO L78 Accepts]: Start accepts. Automaton has 672 states and 680 transitions. Word has length 659 [2022-01-31 17:47:24,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:24,754 INFO L470 AbstractCegarLoop]: Abstraction has 672 states and 680 transitions. [2022-01-31 17:47:24,754 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:24,754 INFO L276 IsEmpty]: Start isEmpty. Operand 672 states and 680 transitions. [2022-01-31 17:47:24,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 668 [2022-01-31 17:47:24,756 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:24,756 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:24,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 17:47:24,757 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:24,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:24,757 INFO L85 PathProgramCache]: Analyzing trace with hash 1847863467, now seen corresponding path program 80 times [2022-01-31 17:47:24,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:24,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [892149662] [2022-01-31 17:47:24,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:24,758 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:24,758 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:24,758 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:24,789 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:25,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:27,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:27,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:27,228 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 17:47:27,228 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:27,228 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [892149662] [2022-01-31 17:47:27,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [892149662] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:27,228 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:27,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 17:47:27,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008904505] [2022-01-31 17:47:27,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:27,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 17:47:27,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:27,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 17:47:27,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 17:47:27,230 INFO L87 Difference]: Start difference. First operand 672 states and 680 transitions. Second operand has 84 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 83 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:30,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:30,452 INFO L93 Difference]: Finished difference Result 1265 states and 1288 transitions. [2022-01-31 17:47:30,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 17:47:30,453 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 83 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 667 [2022-01-31 17:47:30,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:30,454 INFO L225 Difference]: With dead ends: 1265 [2022-01-31 17:47:30,454 INFO L226 Difference]: Without dead ends: 680 [2022-01-31 17:47:30,456 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3320 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=10209, Invalid=16851, Unknown=0, NotChecked=0, Total=27060 [2022-01-31 17:47:30,456 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 715 mSolverCounterSat, 3482 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3482 IncrementalHoareTripleChecker+Valid, 715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:30,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3482 Valid, 715 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:30,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-31 17:47:30,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 680. [2022-01-31 17:47:30,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 680 states, 674 states have (on average 1.013353115727003) internal successors, (683), 674 states have internal predecessors, (683), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:30,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 680 states to 680 states and 688 transitions. [2022-01-31 17:47:30,468 INFO L78 Accepts]: Start accepts. Automaton has 680 states and 688 transitions. Word has length 667 [2022-01-31 17:47:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:30,473 INFO L470 AbstractCegarLoop]: Abstraction has 680 states and 688 transitions. [2022-01-31 17:47:30,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.3095238095238095) internal successors, (110), 83 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 680 states and 688 transitions. [2022-01-31 17:47:30,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 676 [2022-01-31 17:47:30,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:30,475 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:30,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 17:47:30,475 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:30,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:30,476 INFO L85 PathProgramCache]: Analyzing trace with hash -420348633, now seen corresponding path program 81 times [2022-01-31 17:47:30,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:30,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [991151897] [2022-01-31 17:47:30,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:30,477 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:30,477 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:30,477 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:30,506 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:30,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:33,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:33,015 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 17:47:33,015 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:33,015 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [991151897] [2022-01-31 17:47:33,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [991151897] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:33,015 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:33,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 17:47:33,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924634753] [2022-01-31 17:47:33,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:33,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 17:47:33,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:33,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 17:47:33,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 17:47:33,018 INFO L87 Difference]: Start difference. First operand 680 states and 688 transitions. Second operand has 85 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 84 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:37,406 INFO L93 Difference]: Finished difference Result 1280 states and 1303 transitions. [2022-01-31 17:47:37,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 17:47:37,407 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 84 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 675 [2022-01-31 17:47:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:37,420 INFO L225 Difference]: With dead ends: 1280 [2022-01-31 17:47:37,420 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 17:47:37,421 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3402 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=10458, Invalid=17264, Unknown=0, NotChecked=0, Total=27722 [2022-01-31 17:47:37,422 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 799 mSolverCounterSat, 2403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3202 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2403 IncrementalHoareTripleChecker+Valid, 799 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:37,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3202 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2403 Valid, 799 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:37,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 17:47:37,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 688. [2022-01-31 17:47:37,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 688 states, 682 states have (on average 1.0131964809384164) internal successors, (691), 682 states have internal predecessors, (691), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:37,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 688 states to 688 states and 696 transitions. [2022-01-31 17:47:37,455 INFO L78 Accepts]: Start accepts. Automaton has 688 states and 696 transitions. Word has length 675 [2022-01-31 17:47:37,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:37,455 INFO L470 AbstractCegarLoop]: Abstraction has 688 states and 696 transitions. [2022-01-31 17:47:37,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.3058823529411765) internal successors, (111), 84 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:37,455 INFO L276 IsEmpty]: Start isEmpty. Operand 688 states and 696 transitions. [2022-01-31 17:47:37,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 684 [2022-01-31 17:47:37,458 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:37,458 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:37,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 17:47:37,458 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:37,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:37,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1019906859, now seen corresponding path program 82 times [2022-01-31 17:47:37,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:37,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2003938054] [2022-01-31 17:47:37,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:37,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:37,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:37,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:37,508 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:37,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:40,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:40,079 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 17:47:40,080 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:40,080 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2003938054] [2022-01-31 17:47:40,080 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2003938054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:40,080 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:40,080 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 17:47:40,080 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631663134] [2022-01-31 17:47:40,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:40,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 17:47:40,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:40,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 17:47:40,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 17:47:40,082 INFO L87 Difference]: Start difference. First operand 688 states and 696 transitions. Second operand has 86 states, 86 states have (on average 1.302325581395349) internal successors, (112), 85 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:44,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:44,356 INFO L93 Difference]: Finished difference Result 1295 states and 1318 transitions. [2022-01-31 17:47:44,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 17:47:44,356 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.302325581395349) internal successors, (112), 85 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 683 [2022-01-31 17:47:44,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:44,357 INFO L225 Difference]: With dead ends: 1295 [2022-01-31 17:47:44,357 INFO L226 Difference]: Without dead ends: 696 [2022-01-31 17:47:44,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 167 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3485 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=10710, Invalid=17682, Unknown=0, NotChecked=0, Total=28392 [2022-01-31 17:47:44,359 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 807 mSolverCounterSat, 3271 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 4078 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3271 IncrementalHoareTripleChecker+Valid, 807 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:44,359 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 4078 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3271 Valid, 807 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:47:44,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 696 states. [2022-01-31 17:47:44,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 696 to 696. [2022-01-31 17:47:44,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 696 states, 690 states have (on average 1.0130434782608695) internal successors, (699), 690 states have internal predecessors, (699), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:44,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 696 states to 696 states and 704 transitions. [2022-01-31 17:47:44,375 INFO L78 Accepts]: Start accepts. Automaton has 696 states and 704 transitions. Word has length 683 [2022-01-31 17:47:44,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:44,375 INFO L470 AbstractCegarLoop]: Abstraction has 696 states and 704 transitions. [2022-01-31 17:47:44,376 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.302325581395349) internal successors, (112), 85 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:44,376 INFO L276 IsEmpty]: Start isEmpty. Operand 696 states and 704 transitions. [2022-01-31 17:47:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 692 [2022-01-31 17:47:44,378 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:44,378 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:44,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 17:47:44,378 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:44,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:44,379 INFO L85 PathProgramCache]: Analyzing trace with hash -1034021977, now seen corresponding path program 83 times [2022-01-31 17:47:44,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:44,379 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238285022] [2022-01-31 17:47:44,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:44,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:44,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:44,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:44,410 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:44,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:46,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:46,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:46,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:46,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238285022] [2022-01-31 17:47:46,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238285022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:46,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:46,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 17:47:46,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339461668] [2022-01-31 17:47:46,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:46,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 17:47:46,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:46,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 17:47:46,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 17:47:46,606 INFO L87 Difference]: Start difference. First operand 696 states and 704 transitions. Second operand has 87 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 86 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:50,600 INFO L93 Difference]: Finished difference Result 1310 states and 1333 transitions. [2022-01-31 17:47:50,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 17:47:50,601 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 86 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 691 [2022-01-31 17:47:50,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:50,602 INFO L225 Difference]: With dead ends: 1310 [2022-01-31 17:47:50,602 INFO L226 Difference]: Without dead ends: 704 [2022-01-31 17:47:50,603 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3569 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=10965, Invalid=18105, Unknown=0, NotChecked=0, Total=29070 [2022-01-31 17:47:50,604 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 777 mSolverCounterSat, 2797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 3574 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2797 IncrementalHoareTripleChecker+Valid, 777 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:50,604 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 3574 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2797 Valid, 777 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:47:50,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-31 17:47:50,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 704. [2022-01-31 17:47:50,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 704 states, 698 states have (on average 1.012893982808023) internal successors, (707), 698 states have internal predecessors, (707), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:50,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 704 states to 704 states and 712 transitions. [2022-01-31 17:47:50,632 INFO L78 Accepts]: Start accepts. Automaton has 704 states and 712 transitions. Word has length 691 [2022-01-31 17:47:50,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:50,632 INFO L470 AbstractCegarLoop]: Abstraction has 704 states and 712 transitions. [2022-01-31 17:47:50,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.2988505747126438) internal successors, (113), 86 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:50,647 INFO L276 IsEmpty]: Start isEmpty. Operand 704 states and 712 transitions. [2022-01-31 17:47:50,649 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 700 [2022-01-31 17:47:50,649 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:50,649 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:50,650 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 17:47:50,650 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:50,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:50,650 INFO L85 PathProgramCache]: Analyzing trace with hash -1873326677, now seen corresponding path program 84 times [2022-01-31 17:47:50,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:50,651 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [467686365] [2022-01-31 17:47:50,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:50,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:50,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:50,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:50,684 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:50,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:47:53,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:47:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:47:53,379 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:47:53,379 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [467686365] [2022-01-31 17:47:53,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [467686365] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:47:53,379 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:47:53,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 17:47:53,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313291552] [2022-01-31 17:47:53,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:47:53,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 17:47:53,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:47:53,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 17:47:53,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 17:47:53,382 INFO L87 Difference]: Start difference. First operand 704 states and 712 transitions. Second operand has 88 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 87 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:58,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:47:58,241 INFO L93 Difference]: Finished difference Result 1325 states and 1348 transitions. [2022-01-31 17:47:58,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 17:47:58,241 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 87 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 699 [2022-01-31 17:47:58,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:47:58,242 INFO L225 Difference]: With dead ends: 1325 [2022-01-31 17:47:58,242 INFO L226 Difference]: Without dead ends: 712 [2022-01-31 17:47:58,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 171 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3654 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=11223, Invalid=18533, Unknown=0, NotChecked=0, Total=29756 [2022-01-31 17:47:58,247 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 747 mSolverCounterSat, 3880 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3880 IncrementalHoareTripleChecker+Valid, 747 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:47:58,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3880 Valid, 747 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:47:58,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 712 states. [2022-01-31 17:47:58,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 712 to 712. [2022-01-31 17:47:58,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 712 states, 706 states have (on average 1.0127478753541077) internal successors, (715), 706 states have internal predecessors, (715), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:47:58,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 712 states to 712 states and 720 transitions. [2022-01-31 17:47:58,263 INFO L78 Accepts]: Start accepts. Automaton has 712 states and 720 transitions. Word has length 699 [2022-01-31 17:47:58,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:47:58,263 INFO L470 AbstractCegarLoop]: Abstraction has 712 states and 720 transitions. [2022-01-31 17:47:58,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.2954545454545454) internal successors, (114), 87 states have internal predecessors, (114), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:47:58,264 INFO L276 IsEmpty]: Start isEmpty. Operand 712 states and 720 transitions. [2022-01-31 17:47:58,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 708 [2022-01-31 17:47:58,266 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:47:58,266 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:47:58,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 17:47:58,266 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:47:58,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:47:58,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1225307609, now seen corresponding path program 85 times [2022-01-31 17:47:58,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:47:58,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1398594116] [2022-01-31 17:47:58,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:47:58,270 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:47:58,271 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:47:58,271 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:47:58,303 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:47:58,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:00,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:00,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:00,760 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 17:48:00,760 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:00,760 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1398594116] [2022-01-31 17:48:00,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1398594116] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:00,760 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:00,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 17:48:00,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494319164] [2022-01-31 17:48:00,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:00,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 17:48:00,761 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:00,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 17:48:00,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 17:48:00,762 INFO L87 Difference]: Start difference. First operand 712 states and 720 transitions. Second operand has 89 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 88 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:05,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:05,200 INFO L93 Difference]: Finished difference Result 1340 states and 1363 transitions. [2022-01-31 17:48:05,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 17:48:05,201 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 88 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 707 [2022-01-31 17:48:05,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:05,202 INFO L225 Difference]: With dead ends: 1340 [2022-01-31 17:48:05,202 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 17:48:05,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3740 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=11484, Invalid=18966, Unknown=0, NotChecked=0, Total=30450 [2022-01-31 17:48:05,203 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 774 mSolverCounterSat, 3132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 3906 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3132 IncrementalHoareTripleChecker+Valid, 774 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:05,204 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 3906 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3132 Valid, 774 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:05,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 17:48:05,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 720. [2022-01-31 17:48:05,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 720 states, 714 states have (on average 1.0126050420168067) internal successors, (723), 714 states have internal predecessors, (723), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:05,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 720 states to 720 states and 728 transitions. [2022-01-31 17:48:05,216 INFO L78 Accepts]: Start accepts. Automaton has 720 states and 728 transitions. Word has length 707 [2022-01-31 17:48:05,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:05,216 INFO L470 AbstractCegarLoop]: Abstraction has 720 states and 728 transitions. [2022-01-31 17:48:05,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.2921348314606742) internal successors, (115), 88 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:05,216 INFO L276 IsEmpty]: Start isEmpty. Operand 720 states and 728 transitions. [2022-01-31 17:48:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 716 [2022-01-31 17:48:05,218 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:05,219 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:05,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 17:48:05,219 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:05,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:05,219 INFO L85 PathProgramCache]: Analyzing trace with hash -743804885, now seen corresponding path program 86 times [2022-01-31 17:48:05,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:05,219 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006081491] [2022-01-31 17:48:05,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:05,220 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:05,220 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:05,220 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:05,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:05,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:07,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:07,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:07,081 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:07,081 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:07,081 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006081491] [2022-01-31 17:48:07,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006081491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:07,082 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:07,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 17:48:07,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38294226] [2022-01-31 17:48:07,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:07,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 17:48:07,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:07,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 17:48:07,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 17:48:07,084 INFO L87 Difference]: Start difference. First operand 720 states and 728 transitions. Second operand has 90 states, 90 states have (on average 1.288888888888889) internal successors, (116), 89 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:10,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:10,676 INFO L93 Difference]: Finished difference Result 1355 states and 1378 transitions. [2022-01-31 17:48:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 17:48:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.288888888888889) internal successors, (116), 89 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 715 [2022-01-31 17:48:10,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:10,677 INFO L225 Difference]: With dead ends: 1355 [2022-01-31 17:48:10,677 INFO L226 Difference]: Without dead ends: 728 [2022-01-31 17:48:10,679 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3827 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=11748, Invalid=19404, Unknown=0, NotChecked=0, Total=31152 [2022-01-31 17:48:10,679 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 839 mSolverCounterSat, 3146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3146 IncrementalHoareTripleChecker+Valid, 839 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:10,679 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3146 Valid, 839 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:10,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 728 states. [2022-01-31 17:48:10,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 728 to 728. [2022-01-31 17:48:10,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 728 states, 722 states have (on average 1.0124653739612188) internal successors, (731), 722 states have internal predecessors, (731), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:10,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 728 states to 728 states and 736 transitions. [2022-01-31 17:48:10,691 INFO L78 Accepts]: Start accepts. Automaton has 728 states and 736 transitions. Word has length 715 [2022-01-31 17:48:10,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:10,691 INFO L470 AbstractCegarLoop]: Abstraction has 728 states and 736 transitions. [2022-01-31 17:48:10,691 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.288888888888889) internal successors, (116), 89 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:10,691 INFO L276 IsEmpty]: Start isEmpty. Operand 728 states and 736 transitions. [2022-01-31 17:48:10,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 724 [2022-01-31 17:48:10,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:10,694 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:10,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 17:48:10,694 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:10,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:10,694 INFO L85 PathProgramCache]: Analyzing trace with hash 878551207, now seen corresponding path program 87 times [2022-01-31 17:48:10,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:10,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348731948] [2022-01-31 17:48:10,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:10,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:10,695 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:10,695 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:10,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:10,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:12,651 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 17:48:12,651 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:12,651 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348731948] [2022-01-31 17:48:12,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348731948] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:12,651 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:12,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 17:48:12,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98678460] [2022-01-31 17:48:12,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:12,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 17:48:12,652 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:12,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 17:48:12,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 17:48:12,653 INFO L87 Difference]: Start difference. First operand 728 states and 736 transitions. Second operand has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 90 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:16,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:16,426 INFO L93 Difference]: Finished difference Result 1370 states and 1393 transitions. [2022-01-31 17:48:16,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 17:48:16,426 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 90 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 723 [2022-01-31 17:48:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:16,427 INFO L225 Difference]: With dead ends: 1370 [2022-01-31 17:48:16,427 INFO L226 Difference]: Without dead ends: 736 [2022-01-31 17:48:16,429 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3915 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=12015, Invalid=19847, Unknown=0, NotChecked=0, Total=31862 [2022-01-31 17:48:16,429 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 847 mSolverCounterSat, 2969 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2969 IncrementalHoareTripleChecker+Valid, 847 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:16,429 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2969 Valid, 847 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 736 states. [2022-01-31 17:48:16,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 736 to 736. [2022-01-31 17:48:16,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 736 states, 730 states have (on average 1.0123287671232877) internal successors, (739), 730 states have internal predecessors, (739), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:16,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 736 states to 736 states and 744 transitions. [2022-01-31 17:48:16,441 INFO L78 Accepts]: Start accepts. Automaton has 736 states and 744 transitions. Word has length 723 [2022-01-31 17:48:16,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:16,441 INFO L470 AbstractCegarLoop]: Abstraction has 736 states and 744 transitions. [2022-01-31 17:48:16,441 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.2857142857142858) internal successors, (117), 90 states have internal predecessors, (117), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:16,441 INFO L276 IsEmpty]: Start isEmpty. Operand 736 states and 744 transitions. [2022-01-31 17:48:16,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 732 [2022-01-31 17:48:16,443 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:16,444 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:16,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 17:48:16,444 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:16,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:16,444 INFO L85 PathProgramCache]: Analyzing trace with hash 1940124331, now seen corresponding path program 88 times [2022-01-31 17:48:16,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:16,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1025645855] [2022-01-31 17:48:16,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:16,445 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:16,445 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:16,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:16,476 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:16,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:18,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:18,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:18,983 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 17:48:18,984 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:18,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1025645855] [2022-01-31 17:48:18,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1025645855] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:18,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:18,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 17:48:18,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517856980] [2022-01-31 17:48:18,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:18,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 17:48:18,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:18,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 17:48:18,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 17:48:18,986 INFO L87 Difference]: Start difference. First operand 736 states and 744 transitions. Second operand has 92 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:23,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:23,803 INFO L93 Difference]: Finished difference Result 1385 states and 1408 transitions. [2022-01-31 17:48:23,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 17:48:23,803 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 731 [2022-01-31 17:48:23,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:23,804 INFO L225 Difference]: With dead ends: 1385 [2022-01-31 17:48:23,804 INFO L226 Difference]: Without dead ends: 744 [2022-01-31 17:48:23,805 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4004 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=12285, Invalid=20295, Unknown=0, NotChecked=0, Total=32580 [2022-01-31 17:48:23,806 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 855 mSolverCounterSat, 2951 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2951 IncrementalHoareTripleChecker+Valid, 855 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:23,806 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2951 Valid, 855 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:48:23,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2022-01-31 17:48:23,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 744. [2022-01-31 17:48:23,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 744 states, 738 states have (on average 1.0121951219512195) internal successors, (747), 738 states have internal predecessors, (747), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:23,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 744 states to 744 states and 752 transitions. [2022-01-31 17:48:23,818 INFO L78 Accepts]: Start accepts. Automaton has 744 states and 752 transitions. Word has length 731 [2022-01-31 17:48:23,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:23,818 INFO L470 AbstractCegarLoop]: Abstraction has 744 states and 752 transitions. [2022-01-31 17:48:23,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.2826086956521738) internal successors, (118), 91 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:23,819 INFO L276 IsEmpty]: Start isEmpty. Operand 744 states and 752 transitions. [2022-01-31 17:48:23,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 740 [2022-01-31 17:48:23,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:23,822 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:23,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 17:48:23,822 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:23,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:23,822 INFO L85 PathProgramCache]: Analyzing trace with hash -936306905, now seen corresponding path program 89 times [2022-01-31 17:48:23,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:23,822 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411208966] [2022-01-31 17:48:23,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:23,823 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:23,823 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:23,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:23,858 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:24,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:26,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:26,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:26,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:26,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:26,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411208966] [2022-01-31 17:48:26,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411208966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:26,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:26,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 17:48:26,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080960315] [2022-01-31 17:48:26,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:26,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-01-31 17:48:26,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:26,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-01-31 17:48:26,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4188, Invalid=4368, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 17:48:26,507 INFO L87 Difference]: Start difference. First operand 744 states and 752 transitions. Second operand has 93 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 92 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:30,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:30,896 INFO L93 Difference]: Finished difference Result 1400 states and 1423 transitions. [2022-01-31 17:48:30,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 17:48:30,896 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 92 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 739 [2022-01-31 17:48:30,896 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:30,897 INFO L225 Difference]: With dead ends: 1400 [2022-01-31 17:48:30,897 INFO L226 Difference]: Without dead ends: 752 [2022-01-31 17:48:30,898 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4094 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=12558, Invalid=20748, Unknown=0, NotChecked=0, Total=33306 [2022-01-31 17:48:30,899 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 806 mSolverCounterSat, 3311 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3311 IncrementalHoareTripleChecker+Valid, 806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:30,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3311 Valid, 806 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:30,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 752 states. [2022-01-31 17:48:30,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 752 to 752. [2022-01-31 17:48:30,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 752 states, 746 states have (on average 1.0120643431635388) internal successors, (755), 746 states have internal predecessors, (755), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:30,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 752 states to 752 states and 760 transitions. [2022-01-31 17:48:30,911 INFO L78 Accepts]: Start accepts. Automaton has 752 states and 760 transitions. Word has length 739 [2022-01-31 17:48:30,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:30,911 INFO L470 AbstractCegarLoop]: Abstraction has 752 states and 760 transitions. [2022-01-31 17:48:30,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.2795698924731183) internal successors, (119), 92 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:30,911 INFO L276 IsEmpty]: Start isEmpty. Operand 752 states and 760 transitions. [2022-01-31 17:48:30,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 748 [2022-01-31 17:48:30,914 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:30,914 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 90, 90, 90, 90, 90, 90, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:30,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 17:48:30,914 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:30,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:30,914 INFO L85 PathProgramCache]: Analyzing trace with hash -551299797, now seen corresponding path program 90 times [2022-01-31 17:48:30,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:30,914 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1890603350] [2022-01-31 17:48:30,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:30,916 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:30,916 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:30,916 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:30,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:31,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:33,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:33,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:33,856 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 17:48:33,856 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:33,856 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1890603350] [2022-01-31 17:48:33,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1890603350] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:33,857 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:33,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-01-31 17:48:33,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062452389] [2022-01-31 17:48:33,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:33,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 17:48:33,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:33,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 17:48:33,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 17:48:33,859 INFO L87 Difference]: Start difference. First operand 752 states and 760 transitions. Second operand has 94 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 93 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:38,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:38,995 INFO L93 Difference]: Finished difference Result 1415 states and 1438 transitions. [2022-01-31 17:48:38,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-01-31 17:48:38,995 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 93 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 747 [2022-01-31 17:48:38,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:38,996 INFO L225 Difference]: With dead ends: 1415 [2022-01-31 17:48:38,996 INFO L226 Difference]: Without dead ends: 760 [2022-01-31 17:48:38,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 183 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4185 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=12834, Invalid=21206, Unknown=0, NotChecked=0, Total=34040 [2022-01-31 17:48:38,998 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 871 mSolverCounterSat, 3002 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 3873 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3002 IncrementalHoareTripleChecker+Valid, 871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:38,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 3873 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3002 Valid, 871 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:48:38,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 760 states. [2022-01-31 17:48:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 760 to 760. [2022-01-31 17:48:39,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 760 states, 754 states have (on average 1.0119363395225465) internal successors, (763), 754 states have internal predecessors, (763), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:39,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 760 states to 760 states and 768 transitions. [2022-01-31 17:48:39,010 INFO L78 Accepts]: Start accepts. Automaton has 760 states and 768 transitions. Word has length 747 [2022-01-31 17:48:39,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:39,011 INFO L470 AbstractCegarLoop]: Abstraction has 760 states and 768 transitions. [2022-01-31 17:48:39,011 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.2765957446808511) internal successors, (120), 93 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:39,011 INFO L276 IsEmpty]: Start isEmpty. Operand 760 states and 768 transitions. [2022-01-31 17:48:39,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 756 [2022-01-31 17:48:39,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:39,013 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 91, 91, 91, 91, 91, 91, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:39,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 17:48:39,014 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:39,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:39,014 INFO L85 PathProgramCache]: Analyzing trace with hash 504475047, now seen corresponding path program 91 times [2022-01-31 17:48:39,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:39,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1486185665] [2022-01-31 17:48:39,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:39,015 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:39,015 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:39,015 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:39,048 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:39,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:41,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:41,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:41,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:41,801 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:41,801 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1486185665] [2022-01-31 17:48:41,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1486185665] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:41,802 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:41,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [95] imperfect sequences [] total 95 [2022-01-31 17:48:41,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008967107] [2022-01-31 17:48:41,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:41,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2022-01-31 17:48:41,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:41,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2022-01-31 17:48:41,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4373, Invalid=4557, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 17:48:41,803 INFO L87 Difference]: Start difference. First operand 760 states and 768 transitions. Second operand has 95 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 94 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:45,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:45,875 INFO L93 Difference]: Finished difference Result 1430 states and 1453 transitions. [2022-01-31 17:48:45,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-01-31 17:48:45,875 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 94 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 755 [2022-01-31 17:48:45,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:45,876 INFO L225 Difference]: With dead ends: 1430 [2022-01-31 17:48:45,876 INFO L226 Difference]: Without dead ends: 768 [2022-01-31 17:48:45,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4277 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=13113, Invalid=21669, Unknown=0, NotChecked=0, Total=34782 [2022-01-31 17:48:45,878 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 822 mSolverCounterSat, 3360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4182 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3360 IncrementalHoareTripleChecker+Valid, 822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:45,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4182 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3360 Valid, 822 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:45,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2022-01-31 17:48:45,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 768. [2022-01-31 17:48:45,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 762 states have (on average 1.0118110236220472) internal successors, (771), 762 states have internal predecessors, (771), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:45,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 776 transitions. [2022-01-31 17:48:45,890 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 776 transitions. Word has length 755 [2022-01-31 17:48:45,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:45,890 INFO L470 AbstractCegarLoop]: Abstraction has 768 states and 776 transitions. [2022-01-31 17:48:45,890 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.2736842105263158) internal successors, (121), 94 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:45,891 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 776 transitions. [2022-01-31 17:48:45,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 764 [2022-01-31 17:48:45,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:45,893 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 92, 92, 92, 92, 92, 92, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:45,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 17:48:45,894 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:45,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:45,894 INFO L85 PathProgramCache]: Analyzing trace with hash -2029381717, now seen corresponding path program 92 times [2022-01-31 17:48:45,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:45,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [504580894] [2022-01-31 17:48:45,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:45,895 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:45,895 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:45,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:45,929 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:46,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:47,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:47,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:47,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:47,995 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:47,995 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [504580894] [2022-01-31 17:48:47,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [504580894] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:47,995 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:47,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-01-31 17:48:47,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877242662] [2022-01-31 17:48:47,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:47,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-01-31 17:48:47,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:47,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-01-31 17:48:47,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4467, Invalid=4653, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 17:48:47,997 INFO L87 Difference]: Start difference. First operand 768 states and 776 transitions. Second operand has 96 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 95 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:52,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:52,184 INFO L93 Difference]: Finished difference Result 1445 states and 1468 transitions. [2022-01-31 17:48:52,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-01-31 17:48:52,184 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 95 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 763 [2022-01-31 17:48:52,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:52,185 INFO L225 Difference]: With dead ends: 1445 [2022-01-31 17:48:52,185 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 17:48:52,187 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4370 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=13395, Invalid=22137, Unknown=0, NotChecked=0, Total=35532 [2022-01-31 17:48:52,187 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 868 mSolverCounterSat, 2981 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 3849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2981 IncrementalHoareTripleChecker+Valid, 868 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:52,187 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 3849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2981 Valid, 868 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:48:52,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 17:48:52,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 776. [2022-01-31 17:48:52,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 776 states, 770 states have (on average 1.0116883116883117) internal successors, (779), 770 states have internal predecessors, (779), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:52,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 776 states to 776 states and 784 transitions. [2022-01-31 17:48:52,201 INFO L78 Accepts]: Start accepts. Automaton has 776 states and 784 transitions. Word has length 763 [2022-01-31 17:48:52,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:52,201 INFO L470 AbstractCegarLoop]: Abstraction has 776 states and 784 transitions. [2022-01-31 17:48:52,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.2708333333333333) internal successors, (122), 95 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:52,201 INFO L276 IsEmpty]: Start isEmpty. Operand 776 states and 784 transitions. [2022-01-31 17:48:52,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 772 [2022-01-31 17:48:52,204 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:52,204 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 93, 93, 93, 93, 93, 93, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:52,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 17:48:52,204 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:52,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:52,204 INFO L85 PathProgramCache]: Analyzing trace with hash -6331353, now seen corresponding path program 93 times [2022-01-31 17:48:52,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:52,205 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [529814098] [2022-01-31 17:48:52,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:52,206 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:52,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:52,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:52,241 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:52,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:48:54,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:48:54,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:48:54,258 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:48:54,258 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [529814098] [2022-01-31 17:48:54,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [529814098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:48:54,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:48:54,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [97] imperfect sequences [] total 97 [2022-01-31 17:48:54,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028704100] [2022-01-31 17:48:54,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:48:54,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-01-31 17:48:54,259 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:48:54,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-01-31 17:48:54,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4562, Invalid=4750, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 17:48:54,261 INFO L87 Difference]: Start difference. First operand 776 states and 784 transitions. Second operand has 97 states, 97 states have (on average 1.268041237113402) internal successors, (123), 96 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:58,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:48:58,674 INFO L93 Difference]: Finished difference Result 1460 states and 1483 transitions. [2022-01-31 17:48:58,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-01-31 17:48:58,674 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.268041237113402) internal successors, (123), 96 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 771 [2022-01-31 17:48:58,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:48:58,676 INFO L225 Difference]: With dead ends: 1460 [2022-01-31 17:48:58,676 INFO L226 Difference]: Without dead ends: 784 [2022-01-31 17:48:58,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4464 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=13680, Invalid=22610, Unknown=0, NotChecked=0, Total=36290 [2022-01-31 17:48:58,678 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 3377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3377 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:48:58,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3377 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 17:48:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 784 states. [2022-01-31 17:48:58,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 784 to 784. [2022-01-31 17:48:58,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 784 states, 778 states have (on average 1.0115681233933163) internal successors, (787), 778 states have internal predecessors, (787), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:48:58,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 784 states to 784 states and 792 transitions. [2022-01-31 17:48:58,692 INFO L78 Accepts]: Start accepts. Automaton has 784 states and 792 transitions. Word has length 771 [2022-01-31 17:48:58,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:48:58,692 INFO L470 AbstractCegarLoop]: Abstraction has 784 states and 792 transitions. [2022-01-31 17:48:58,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.268041237113402) internal successors, (123), 96 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:48:58,693 INFO L276 IsEmpty]: Start isEmpty. Operand 784 states and 792 transitions. [2022-01-31 17:48:58,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 780 [2022-01-31 17:48:58,695 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:48:58,696 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 94, 94, 94, 94, 94, 94, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:48:58,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 17:48:58,696 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:48:58,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:48:58,696 INFO L85 PathProgramCache]: Analyzing trace with hash -566838741, now seen corresponding path program 94 times [2022-01-31 17:48:58,696 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:48:58,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16671677] [2022-01-31 17:48:58,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:48:58,697 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:48:58,697 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:48:58,697 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:48:58,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:48:59,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:02,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:02,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:02,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:02,024 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:02,024 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16671677] [2022-01-31 17:49:02,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16671677] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:02,024 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:02,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-01-31 17:49:02,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534240628] [2022-01-31 17:49:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:02,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-01-31 17:49:02,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-01-31 17:49:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4658, Invalid=4848, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 17:49:02,026 INFO L87 Difference]: Start difference. First operand 784 states and 792 transitions. Second operand has 98 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 97 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:06,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:06,614 INFO L93 Difference]: Finished difference Result 1475 states and 1498 transitions. [2022-01-31 17:49:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-01-31 17:49:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 97 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 779 [2022-01-31 17:49:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:06,615 INFO L225 Difference]: With dead ends: 1475 [2022-01-31 17:49:06,615 INFO L226 Difference]: Without dead ends: 792 [2022-01-31 17:49:06,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4559 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=13968, Invalid=23088, Unknown=0, NotChecked=0, Total=37056 [2022-01-31 17:49:06,617 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 941 mSolverCounterSat, 3082 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4023 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3082 IncrementalHoareTripleChecker+Valid, 941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:06,617 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 4023 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3082 Valid, 941 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:49:06,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 792 states. [2022-01-31 17:49:06,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 792 to 792. [2022-01-31 17:49:06,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.0114503816793894) internal successors, (795), 786 states have internal predecessors, (795), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 800 transitions. [2022-01-31 17:49:06,631 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 800 transitions. Word has length 779 [2022-01-31 17:49:06,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:06,631 INFO L470 AbstractCegarLoop]: Abstraction has 792 states and 800 transitions. [2022-01-31 17:49:06,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.2653061224489797) internal successors, (124), 97 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:06,631 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 800 transitions. [2022-01-31 17:49:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 788 [2022-01-31 17:49:06,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:06,634 INFO L514 BasicCegarLoop]: trace histogram [95, 95, 95, 95, 95, 95, 95, 95, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:06,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 17:49:06,634 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:06,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:06,635 INFO L85 PathProgramCache]: Analyzing trace with hash 1417296551, now seen corresponding path program 95 times [2022-01-31 17:49:06,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:06,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [528872900] [2022-01-31 17:49:06,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:06,636 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:06,636 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:06,636 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:06,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:06,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:09,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:09,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:09,507 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 17:49:09,507 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:09,507 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [528872900] [2022-01-31 17:49:09,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [528872900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:09,507 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:09,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-01-31 17:49:09,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752394462] [2022-01-31 17:49:09,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:09,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-01-31 17:49:09,508 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:09,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-01-31 17:49:09,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4755, Invalid=4947, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 17:49:09,510 INFO L87 Difference]: Start difference. First operand 792 states and 800 transitions. Second operand has 99 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 98 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:15,595 INFO L93 Difference]: Finished difference Result 1490 states and 1513 transitions. [2022-01-31 17:49:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-01-31 17:49:15,595 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 98 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 787 [2022-01-31 17:49:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:15,596 INFO L225 Difference]: With dead ends: 1490 [2022-01-31 17:49:15,597 INFO L226 Difference]: Without dead ends: 800 [2022-01-31 17:49:15,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4655 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=14259, Invalid=23571, Unknown=0, NotChecked=0, Total=37830 [2022-01-31 17:49:15,599 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 892 mSolverCounterSat, 3424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3424 IncrementalHoareTripleChecker+Valid, 892 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:15,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 4316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3424 Valid, 892 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:49:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 800 states. [2022-01-31 17:49:15,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 800 to 800. [2022-01-31 17:49:15,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 800 states, 794 states have (on average 1.0113350125944585) internal successors, (803), 794 states have internal predecessors, (803), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:15,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 800 states to 800 states and 808 transitions. [2022-01-31 17:49:15,612 INFO L78 Accepts]: Start accepts. Automaton has 800 states and 808 transitions. Word has length 787 [2022-01-31 17:49:15,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:15,612 INFO L470 AbstractCegarLoop]: Abstraction has 800 states and 808 transitions. [2022-01-31 17:49:15,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.2626262626262625) internal successors, (125), 98 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:15,613 INFO L276 IsEmpty]: Start isEmpty. Operand 800 states and 808 transitions. [2022-01-31 17:49:15,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 796 [2022-01-31 17:49:15,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:15,616 INFO L514 BasicCegarLoop]: trace histogram [96, 96, 96, 96, 96, 96, 96, 96, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:15,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 17:49:15,616 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:15,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:15,616 INFO L85 PathProgramCache]: Analyzing trace with hash 1502198955, now seen corresponding path program 96 times [2022-01-31 17:49:15,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:15,616 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787195770] [2022-01-31 17:49:15,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:15,618 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:15,618 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:15,618 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:15,671 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:15,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:19,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:19,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:19,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:19,055 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:19,055 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787195770] [2022-01-31 17:49:19,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787195770] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:19,055 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:19,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-01-31 17:49:19,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373609954] [2022-01-31 17:49:19,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:19,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-01-31 17:49:19,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:19,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-01-31 17:49:19,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4853, Invalid=5047, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 17:49:19,058 INFO L87 Difference]: Start difference. First operand 800 states and 808 transitions. Second operand has 100 states, 100 states have (on average 1.26) internal successors, (126), 99 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:23,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:23,883 INFO L93 Difference]: Finished difference Result 1505 states and 1528 transitions. [2022-01-31 17:49:23,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2022-01-31 17:49:23,883 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.26) internal successors, (126), 99 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 795 [2022-01-31 17:49:23,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:23,884 INFO L225 Difference]: With dead ends: 1505 [2022-01-31 17:49:23,884 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 17:49:23,886 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 195 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4752 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=14553, Invalid=24059, Unknown=0, NotChecked=0, Total=38612 [2022-01-31 17:49:23,886 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 3235 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 4154 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3235 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:23,887 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 4154 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3235 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 17:49:23,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 17:49:23,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 808. [2022-01-31 17:49:23,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 808 states, 802 states have (on average 1.0112219451371571) internal successors, (811), 802 states have internal predecessors, (811), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:23,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 808 states to 808 states and 816 transitions. [2022-01-31 17:49:23,901 INFO L78 Accepts]: Start accepts. Automaton has 808 states and 816 transitions. Word has length 795 [2022-01-31 17:49:23,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:23,901 INFO L470 AbstractCegarLoop]: Abstraction has 808 states and 816 transitions. [2022-01-31 17:49:23,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.26) internal successors, (126), 99 states have internal predecessors, (126), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:23,901 INFO L276 IsEmpty]: Start isEmpty. Operand 808 states and 816 transitions. [2022-01-31 17:49:23,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 804 [2022-01-31 17:49:23,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:23,904 INFO L514 BasicCegarLoop]: trace histogram [97, 97, 97, 97, 97, 97, 97, 97, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:23,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 17:49:23,904 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:23,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:23,905 INFO L85 PathProgramCache]: Analyzing trace with hash 574763303, now seen corresponding path program 97 times [2022-01-31 17:49:23,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:23,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1927181415] [2022-01-31 17:49:23,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:23,906 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:23,906 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:23,906 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:23,957 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:24,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:26,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:26,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:26,201 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 17:49:26,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:26,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1927181415] [2022-01-31 17:49:26,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1927181415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:26,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:26,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-01-31 17:49:26,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159672094] [2022-01-31 17:49:26,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:26,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-01-31 17:49:26,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:26,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-01-31 17:49:26,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4952, Invalid=5148, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 17:49:26,204 INFO L87 Difference]: Start difference. First operand 808 states and 816 transitions. Second operand has 101 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 100 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:31,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:31,091 INFO L93 Difference]: Finished difference Result 1520 states and 1543 transitions. [2022-01-31 17:49:31,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-01-31 17:49:31,091 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 100 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 803 [2022-01-31 17:49:31,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:31,092 INFO L225 Difference]: With dead ends: 1520 [2022-01-31 17:49:31,092 INFO L226 Difference]: Without dead ends: 816 [2022-01-31 17:49:31,094 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4850 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=14850, Invalid=24552, Unknown=0, NotChecked=0, Total=39402 [2022-01-31 17:49:31,095 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 870 mSolverCounterSat, 4212 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4212 IncrementalHoareTripleChecker+Valid, 870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:31,095 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 5082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4212 Valid, 870 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:49:31,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 816 states. [2022-01-31 17:49:31,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 816 to 816. [2022-01-31 17:49:31,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 810 states have (on average 1.011111111111111) internal successors, (819), 810 states have internal predecessors, (819), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:31,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 824 transitions. [2022-01-31 17:49:31,109 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 824 transitions. Word has length 803 [2022-01-31 17:49:31,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:31,109 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 824 transitions. [2022-01-31 17:49:31,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.2574257425742574) internal successors, (127), 100 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:31,109 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 824 transitions. [2022-01-31 17:49:31,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 812 [2022-01-31 17:49:31,112 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:31,112 INFO L514 BasicCegarLoop]: trace histogram [98, 98, 98, 98, 98, 98, 98, 98, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:31,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 17:49:31,112 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:31,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:31,113 INFO L85 PathProgramCache]: Analyzing trace with hash 1877155627, now seen corresponding path program 98 times [2022-01-31 17:49:31,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:31,113 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874386898] [2022-01-31 17:49:31,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:31,114 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:31,114 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:31,114 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:31,159 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:34,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:34,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:34,548 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:34,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874386898] [2022-01-31 17:49:34,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [874386898] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:34,548 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:34,548 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-01-31 17:49:34,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574678645] [2022-01-31 17:49:34,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:34,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-01-31 17:49:34,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-01-31 17:49:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5052, Invalid=5250, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 17:49:34,551 INFO L87 Difference]: Start difference. First operand 816 states and 824 transitions. Second operand has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 101 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:40,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:40,962 INFO L93 Difference]: Finished difference Result 1535 states and 1558 transitions. [2022-01-31 17:49:40,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-01-31 17:49:40,962 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 101 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 811 [2022-01-31 17:49:40,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:40,964 INFO L225 Difference]: With dead ends: 1535 [2022-01-31 17:49:40,964 INFO L226 Difference]: Without dead ends: 824 [2022-01-31 17:49:40,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4949 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15150, Invalid=25050, Unknown=0, NotChecked=0, Total=40200 [2022-01-31 17:49:40,966 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 840 mSolverCounterSat, 4127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 4967 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4127 IncrementalHoareTripleChecker+Valid, 840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:40,966 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 4967 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4127 Valid, 840 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:49:40,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 824 states. [2022-01-31 17:49:40,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 824 to 824. [2022-01-31 17:49:40,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 824 states, 818 states have (on average 1.011002444987775) internal successors, (827), 818 states have internal predecessors, (827), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:40,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 824 states to 824 states and 832 transitions. [2022-01-31 17:49:40,980 INFO L78 Accepts]: Start accepts. Automaton has 824 states and 832 transitions. Word has length 811 [2022-01-31 17:49:40,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:40,980 INFO L470 AbstractCegarLoop]: Abstraction has 824 states and 832 transitions. [2022-01-31 17:49:40,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 101 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:40,981 INFO L276 IsEmpty]: Start isEmpty. Operand 824 states and 832 transitions. [2022-01-31 17:49:40,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 820 [2022-01-31 17:49:40,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:40,984 INFO L514 BasicCegarLoop]: trace histogram [99, 99, 99, 99, 99, 99, 99, 99, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:40,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 17:49:40,984 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:40,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:40,984 INFO L85 PathProgramCache]: Analyzing trace with hash -1936242777, now seen corresponding path program 99 times [2022-01-31 17:49:40,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:40,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [199073301] [2022-01-31 17:49:40,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:40,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:40,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:40,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:41,030 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:41,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:44,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:44,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:44,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:44,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:44,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [199073301] [2022-01-31 17:49:44,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [199073301] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:44,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:44,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-01-31 17:49:44,680 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883027697] [2022-01-31 17:49:44,680 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:44,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-01-31 17:49:44,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:44,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-01-31 17:49:44,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5153, Invalid=5353, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 17:49:44,683 INFO L87 Difference]: Start difference. First operand 824 states and 832 transitions. Second operand has 103 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 102 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:49,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:49,719 INFO L93 Difference]: Finished difference Result 1550 states and 1573 transitions. [2022-01-31 17:49:49,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-01-31 17:49:49,719 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 102 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 819 [2022-01-31 17:49:49,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:49,720 INFO L225 Difference]: With dead ends: 1550 [2022-01-31 17:49:49,721 INFO L226 Difference]: Without dead ends: 832 [2022-01-31 17:49:49,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5049 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=15453, Invalid=25553, Unknown=0, NotChecked=0, Total=41006 [2022-01-31 17:49:49,723 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1019 mSolverCounterSat, 3110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 4129 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3110 IncrementalHoareTripleChecker+Valid, 1019 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:49,723 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 4129 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3110 Valid, 1019 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:49:49,724 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2022-01-31 17:49:49,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 832. [2022-01-31 17:49:49,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 832 states, 826 states have (on average 1.0108958837772397) internal successors, (835), 826 states have internal predecessors, (835), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:49,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 832 states to 832 states and 840 transitions. [2022-01-31 17:49:49,776 INFO L78 Accepts]: Start accepts. Automaton has 832 states and 840 transitions. Word has length 819 [2022-01-31 17:49:49,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:49,776 INFO L470 AbstractCegarLoop]: Abstraction has 832 states and 840 transitions. [2022-01-31 17:49:49,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.2524271844660195) internal successors, (129), 102 states have internal predecessors, (129), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:49,776 INFO L276 IsEmpty]: Start isEmpty. Operand 832 states and 840 transitions. [2022-01-31 17:49:49,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 828 [2022-01-31 17:49:49,779 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:49,779 INFO L514 BasicCegarLoop]: trace histogram [100, 100, 100, 100, 100, 100, 100, 100, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:49,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 17:49:49,779 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:49,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:49,780 INFO L85 PathProgramCache]: Analyzing trace with hash -1708990037, now seen corresponding path program 100 times [2022-01-31 17:49:49,780 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:49,780 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865957106] [2022-01-31 17:49:49,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:49,783 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:49,783 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:49,783 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:49,829 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:49:50,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:53,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:49:53,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:49:53,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:49:53,127 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:49:53,127 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865957106] [2022-01-31 17:49:53,127 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [865957106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:49:53,127 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:49:53,127 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-01-31 17:49:53,127 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450980940] [2022-01-31 17:49:53,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:49:53,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-01-31 17:49:53,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:49:53,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-01-31 17:49:53,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5255, Invalid=5457, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 17:49:53,130 INFO L87 Difference]: Start difference. First operand 832 states and 840 transitions. Second operand has 104 states, 104 states have (on average 1.25) internal successors, (130), 103 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:59,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:49:59,776 INFO L93 Difference]: Finished difference Result 1565 states and 1588 transitions. [2022-01-31 17:49:59,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-01-31 17:49:59,776 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 1.25) internal successors, (130), 103 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 827 [2022-01-31 17:49:59,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:49:59,778 INFO L225 Difference]: With dead ends: 1565 [2022-01-31 17:49:59,778 INFO L226 Difference]: Without dead ends: 840 [2022-01-31 17:49:59,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 203 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5150 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=15759, Invalid=26061, Unknown=0, NotChecked=0, Total=41820 [2022-01-31 17:49:59,785 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 875 mSolverCounterSat, 4172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5047 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4172 IncrementalHoareTripleChecker+Valid, 875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:49:59,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 5047 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4172 Valid, 875 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:49:59,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 840 states. [2022-01-31 17:49:59,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 840 to 840. [2022-01-31 17:49:59,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 840 states, 834 states have (on average 1.0107913669064748) internal successors, (843), 834 states have internal predecessors, (843), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:49:59,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 840 states to 840 states and 848 transitions. [2022-01-31 17:49:59,799 INFO L78 Accepts]: Start accepts. Automaton has 840 states and 848 transitions. Word has length 827 [2022-01-31 17:49:59,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:49:59,799 INFO L470 AbstractCegarLoop]: Abstraction has 840 states and 848 transitions. [2022-01-31 17:49:59,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 1.25) internal successors, (130), 103 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:49:59,800 INFO L276 IsEmpty]: Start isEmpty. Operand 840 states and 848 transitions. [2022-01-31 17:49:59,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 836 [2022-01-31 17:49:59,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:49:59,803 INFO L514 BasicCegarLoop]: trace histogram [101, 101, 101, 101, 101, 101, 101, 101, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:49:59,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 17:49:59,803 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:49:59,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:49:59,803 INFO L85 PathProgramCache]: Analyzing trace with hash -719749593, now seen corresponding path program 101 times [2022-01-31 17:49:59,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:49:59,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509111399] [2022-01-31 17:49:59,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:49:59,804 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:49:59,804 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:49:59,804 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:49:59,850 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:00,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:03,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:03,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:03,364 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 17:50:03,364 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:03,364 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509111399] [2022-01-31 17:50:03,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509111399] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:03,364 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:03,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-01-31 17:50:03,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144599881] [2022-01-31 17:50:03,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:03,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-01-31 17:50:03,364 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:03,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-01-31 17:50:03,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5358, Invalid=5562, Unknown=0, NotChecked=0, Total=10920 [2022-01-31 17:50:03,365 INFO L87 Difference]: Start difference. First operand 840 states and 848 transitions. Second operand has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 104 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:10,269 INFO L93 Difference]: Finished difference Result 1580 states and 1603 transitions. [2022-01-31 17:50:10,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-01-31 17:50:10,270 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 104 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 835 [2022-01-31 17:50:10,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:10,271 INFO L225 Difference]: With dead ends: 1580 [2022-01-31 17:50:10,271 INFO L226 Difference]: Without dead ends: 848 [2022-01-31 17:50:10,273 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5252 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=16068, Invalid=26574, Unknown=0, NotChecked=0, Total=42642 [2022-01-31 17:50:10,273 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 3950 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 4833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3950 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:10,273 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 4833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3950 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:50:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2022-01-31 17:50:10,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 848. [2022-01-31 17:50:10,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 848 states, 842 states have (on average 1.010688836104513) internal successors, (851), 842 states have internal predecessors, (851), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:10,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 848 states to 848 states and 856 transitions. [2022-01-31 17:50:10,287 INFO L78 Accepts]: Start accepts. Automaton has 848 states and 856 transitions. Word has length 835 [2022-01-31 17:50:10,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:10,287 INFO L470 AbstractCegarLoop]: Abstraction has 848 states and 856 transitions. [2022-01-31 17:50:10,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.2476190476190476) internal successors, (131), 104 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 848 states and 856 transitions. [2022-01-31 17:50:10,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 844 [2022-01-31 17:50:10,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:10,291 INFO L514 BasicCegarLoop]: trace histogram [102, 102, 102, 102, 102, 102, 102, 102, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:10,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 17:50:10,291 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:10,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:10,291 INFO L85 PathProgramCache]: Analyzing trace with hash 1395196971, now seen corresponding path program 102 times [2022-01-31 17:50:10,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:10,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [348991552] [2022-01-31 17:50:10,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:10,292 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:10,292 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:10,292 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:10,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:10,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:14,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:14,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:14,201 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 17:50:14,201 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:14,201 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [348991552] [2022-01-31 17:50:14,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [348991552] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:14,201 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:14,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-01-31 17:50:14,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934399047] [2022-01-31 17:50:14,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:14,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-01-31 17:50:14,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:14,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-01-31 17:50:14,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5462, Invalid=5668, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 17:50:14,204 INFO L87 Difference]: Start difference. First operand 848 states and 856 transitions. Second operand has 106 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 105 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:20,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:20,258 INFO L93 Difference]: Finished difference Result 1595 states and 1618 transitions. [2022-01-31 17:50:20,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2022-01-31 17:50:20,258 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 105 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 843 [2022-01-31 17:50:20,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:20,259 INFO L225 Difference]: With dead ends: 1595 [2022-01-31 17:50:20,259 INFO L226 Difference]: Without dead ends: 856 [2022-01-31 17:50:20,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 210 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5355 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=16380, Invalid=27092, Unknown=0, NotChecked=0, Total=43472 [2022-01-31 17:50:20,261 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 872 mSolverCounterSat, 4767 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4767 IncrementalHoareTripleChecker+Valid, 872 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:20,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 5639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4767 Valid, 872 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:50:20,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 856 states. [2022-01-31 17:50:20,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 856 to 856. [2022-01-31 17:50:20,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 850 states have (on average 1.0105882352941176) internal successors, (859), 850 states have internal predecessors, (859), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:20,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 864 transitions. [2022-01-31 17:50:20,275 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 864 transitions. Word has length 843 [2022-01-31 17:50:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:20,275 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 864 transitions. [2022-01-31 17:50:20,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 1.2452830188679245) internal successors, (132), 105 states have internal predecessors, (132), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:20,276 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 864 transitions. [2022-01-31 17:50:20,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 852 [2022-01-31 17:50:20,279 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:20,279 INFO L514 BasicCegarLoop]: trace histogram [103, 103, 103, 103, 103, 103, 103, 103, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:20,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 17:50:20,279 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:20,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:20,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1533596839, now seen corresponding path program 103 times [2022-01-31 17:50:20,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:20,279 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094458370] [2022-01-31 17:50:20,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:20,280 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:20,280 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:20,280 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:20,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:20,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:24,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:24,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:24,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:24,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:24,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094458370] [2022-01-31 17:50:24,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094458370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:24,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:24,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-01-31 17:50:24,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [823683469] [2022-01-31 17:50:24,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:24,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-01-31 17:50:24,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:24,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-01-31 17:50:24,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5567, Invalid=5775, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 17:50:24,036 INFO L87 Difference]: Start difference. First operand 856 states and 864 transitions. Second operand has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:31,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:31,287 INFO L93 Difference]: Finished difference Result 1610 states and 1633 transitions. [2022-01-31 17:50:31,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-01-31 17:50:31,288 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 851 [2022-01-31 17:50:31,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:31,289 INFO L225 Difference]: With dead ends: 1610 [2022-01-31 17:50:31,289 INFO L226 Difference]: Without dead ends: 864 [2022-01-31 17:50:31,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=16695, Invalid=27615, Unknown=0, NotChecked=0, Total=44310 [2022-01-31 17:50:31,291 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 918 mSolverCounterSat, 4053 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4971 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4053 IncrementalHoareTripleChecker+Valid, 918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:31,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4971 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4053 Valid, 918 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:50:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 864 states. [2022-01-31 17:50:31,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 864 to 864. [2022-01-31 17:50:31,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 864 states, 858 states have (on average 1.0104895104895104) internal successors, (867), 858 states have internal predecessors, (867), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:31,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 864 states to 864 states and 872 transitions. [2022-01-31 17:50:31,305 INFO L78 Accepts]: Start accepts. Automaton has 864 states and 872 transitions. Word has length 851 [2022-01-31 17:50:31,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:31,305 INFO L470 AbstractCegarLoop]: Abstraction has 864 states and 872 transitions. [2022-01-31 17:50:31,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.2429906542056075) internal successors, (133), 106 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:31,305 INFO L276 IsEmpty]: Start isEmpty. Operand 864 states and 872 transitions. [2022-01-31 17:50:31,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 860 [2022-01-31 17:50:31,308 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:31,308 INFO L514 BasicCegarLoop]: trace histogram [104, 104, 104, 104, 104, 104, 104, 104, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:31,308 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 17:50:31,309 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:31,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:31,309 INFO L85 PathProgramCache]: Analyzing trace with hash 399869611, now seen corresponding path program 104 times [2022-01-31 17:50:31,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:31,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [521847932] [2022-01-31 17:50:31,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:31,310 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:31,310 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:31,310 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:31,356 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:31,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:35,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:35,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:35,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:35,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:35,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [521847932] [2022-01-31 17:50:35,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [521847932] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:35,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:35,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-01-31 17:50:35,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556333354] [2022-01-31 17:50:35,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:35,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-01-31 17:50:35,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:35,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-01-31 17:50:35,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5673, Invalid=5883, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 17:50:35,299 INFO L87 Difference]: Start difference. First operand 864 states and 872 transitions. Second operand has 108 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 107 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:41,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:41,994 INFO L93 Difference]: Finished difference Result 1625 states and 1648 transitions. [2022-01-31 17:50:41,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-01-31 17:50:41,995 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 107 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 859 [2022-01-31 17:50:41,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:41,996 INFO L225 Difference]: With dead ends: 1625 [2022-01-31 17:50:41,996 INFO L226 Difference]: Without dead ends: 872 [2022-01-31 17:50:41,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5564 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=17013, Invalid=28143, Unknown=0, NotChecked=0, Total=45156 [2022-01-31 17:50:41,998 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 964 mSolverCounterSat, 4244 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4244 IncrementalHoareTripleChecker+Valid, 964 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:41,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4244 Valid, 964 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:50:41,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 872 states. [2022-01-31 17:50:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 872 to 872. [2022-01-31 17:50:42,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 866 states have (on average 1.010392609699769) internal successors, (875), 866 states have internal predecessors, (875), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 880 transitions. [2022-01-31 17:50:42,012 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 880 transitions. Word has length 859 [2022-01-31 17:50:42,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:42,012 INFO L470 AbstractCegarLoop]: Abstraction has 872 states and 880 transitions. [2022-01-31 17:50:42,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.2407407407407407) internal successors, (134), 107 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:42,012 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 880 transitions. [2022-01-31 17:50:42,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 868 [2022-01-31 17:50:42,015 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:42,015 INFO L514 BasicCegarLoop]: trace histogram [105, 105, 105, 105, 105, 105, 105, 105, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:42,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 17:50:42,016 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:42,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:42,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1658500313, now seen corresponding path program 105 times [2022-01-31 17:50:42,016 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:42,016 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435800089] [2022-01-31 17:50:42,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:42,017 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:42,017 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:42,017 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:42,065 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:45,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:45,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:45,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:50:45,505 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:45,505 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435800089] [2022-01-31 17:50:45,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435800089] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:45,505 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:45,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-01-31 17:50:45,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542592311] [2022-01-31 17:50:45,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:45,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-01-31 17:50:45,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:45,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-01-31 17:50:45,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5780, Invalid=5992, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 17:50:45,508 INFO L87 Difference]: Start difference. First operand 872 states and 880 transitions. Second operand has 109 states, 109 states have (on average 1.238532110091743) internal successors, (135), 108 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:53,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:50:53,006 INFO L93 Difference]: Finished difference Result 1640 states and 1663 transitions. [2022-01-31 17:50:53,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-01-31 17:50:53,007 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.238532110091743) internal successors, (135), 108 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 867 [2022-01-31 17:50:53,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:50:53,008 INFO L225 Difference]: With dead ends: 1640 [2022-01-31 17:50:53,008 INFO L226 Difference]: Without dead ends: 880 [2022-01-31 17:50:53,010 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5670 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17334, Invalid=28676, Unknown=0, NotChecked=0, Total=46010 [2022-01-31 17:50:53,015 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 3408 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 4437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3408 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:50:53,015 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 78 Invalid, 4437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3408 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:50:53,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 880 states. [2022-01-31 17:50:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 880 to 880. [2022-01-31 17:50:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 874 states have (on average 1.0102974828375286) internal successors, (883), 874 states have internal predecessors, (883), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:50:53,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 888 transitions. [2022-01-31 17:50:53,030 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 888 transitions. Word has length 867 [2022-01-31 17:50:53,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:50:53,031 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 888 transitions. [2022-01-31 17:50:53,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.238532110091743) internal successors, (135), 108 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:50:53,031 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 888 transitions. [2022-01-31 17:50:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 876 [2022-01-31 17:50:53,034 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:50:53,034 INFO L514 BasicCegarLoop]: trace histogram [106, 106, 106, 106, 106, 106, 106, 106, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:50:53,034 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 17:50:53,034 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:50:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:50:53,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1728604459, now seen corresponding path program 106 times [2022-01-31 17:50:53,035 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:50:53,035 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518773310] [2022-01-31 17:50:53,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:50:53,035 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:50:53,035 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:50:53,036 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:50:53,088 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:50:53,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:56,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:50:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:50:56,889 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 17:50:56,889 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:50:56,889 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518773310] [2022-01-31 17:50:56,889 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518773310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:50:56,889 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:50:56,889 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-01-31 17:50:56,889 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087804284] [2022-01-31 17:50:56,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:50:56,889 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-01-31 17:50:56,889 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:50:56,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-01-31 17:50:56,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5888, Invalid=6102, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 17:50:56,891 INFO L87 Difference]: Start difference. First operand 880 states and 888 transitions. Second operand has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 109 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:03,947 INFO L93 Difference]: Finished difference Result 1655 states and 1678 transitions. [2022-01-31 17:51:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2022-01-31 17:51:03,947 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 109 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 875 [2022-01-31 17:51:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:03,948 INFO L225 Difference]: With dead ends: 1655 [2022-01-31 17:51:03,948 INFO L226 Difference]: Without dead ends: 888 [2022-01-31 17:51:03,951 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 215 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5777 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=17658, Invalid=29214, Unknown=0, NotChecked=0, Total=46872 [2022-01-31 17:51:03,951 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 999 mSolverCounterSat, 3801 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 4800 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3801 IncrementalHoareTripleChecker+Valid, 999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:03,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 4800 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3801 Valid, 999 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 17:51:03,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 888 states. [2022-01-31 17:51:03,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 888 to 888. [2022-01-31 17:51:03,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 888 states, 882 states have (on average 1.010204081632653) internal successors, (891), 882 states have internal predecessors, (891), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:03,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 888 states to 888 states and 896 transitions. [2022-01-31 17:51:03,965 INFO L78 Accepts]: Start accepts. Automaton has 888 states and 896 transitions. Word has length 875 [2022-01-31 17:51:03,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:03,965 INFO L470 AbstractCegarLoop]: Abstraction has 888 states and 896 transitions. [2022-01-31 17:51:03,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 1.2363636363636363) internal successors, (136), 109 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:03,965 INFO L276 IsEmpty]: Start isEmpty. Operand 888 states and 896 transitions. [2022-01-31 17:51:03,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 884 [2022-01-31 17:51:03,968 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:03,969 INFO L514 BasicCegarLoop]: trace histogram [107, 107, 107, 107, 107, 107, 107, 107, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:03,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 17:51:03,969 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:03,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:03,969 INFO L85 PathProgramCache]: Analyzing trace with hash 904847783, now seen corresponding path program 107 times [2022-01-31 17:51:03,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:03,969 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [593553974] [2022-01-31 17:51:03,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:03,970 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:03,970 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:03,970 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:04,019 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:04,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:06,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:06,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:06,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:06,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [593553974] [2022-01-31 17:51:06,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [593553974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:06,752 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:06,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-01-31 17:51:06,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060388382] [2022-01-31 17:51:06,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:06,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-01-31 17:51:06,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:06,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-01-31 17:51:06,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5997, Invalid=6213, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 17:51:06,755 INFO L87 Difference]: Start difference. First operand 888 states and 896 transitions. Second operand has 111 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 110 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:12,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:12,798 INFO L93 Difference]: Finished difference Result 1670 states and 1693 transitions. [2022-01-31 17:51:12,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-01-31 17:51:12,799 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 110 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 883 [2022-01-31 17:51:12,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:12,811 INFO L225 Difference]: With dead ends: 1670 [2022-01-31 17:51:12,811 INFO L226 Difference]: Without dead ends: 896 [2022-01-31 17:51:12,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5885 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=17985, Invalid=29757, Unknown=0, NotChecked=0, Total=47742 [2022-01-31 17:51:12,814 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 969 mSolverCounterSat, 4481 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4481 IncrementalHoareTripleChecker+Valid, 969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:12,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 5450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4481 Valid, 969 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:51:12,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2022-01-31 17:51:12,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 896. [2022-01-31 17:51:12,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 896 states, 890 states have (on average 1.010112359550562) internal successors, (899), 890 states have internal predecessors, (899), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:12,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 896 states to 896 states and 904 transitions. [2022-01-31 17:51:12,829 INFO L78 Accepts]: Start accepts. Automaton has 896 states and 904 transitions. Word has length 883 [2022-01-31 17:51:12,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:12,829 INFO L470 AbstractCegarLoop]: Abstraction has 896 states and 904 transitions. [2022-01-31 17:51:12,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.2342342342342343) internal successors, (137), 110 states have internal predecessors, (137), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:12,829 INFO L276 IsEmpty]: Start isEmpty. Operand 896 states and 904 transitions. [2022-01-31 17:51:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 892 [2022-01-31 17:51:12,833 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:12,833 INFO L514 BasicCegarLoop]: trace histogram [108, 108, 108, 108, 108, 108, 108, 108, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:12,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 17:51:12,833 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:12,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:12,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1046369365, now seen corresponding path program 108 times [2022-01-31 17:51:12,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:12,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1663138235] [2022-01-31 17:51:12,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:12,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:12,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:12,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:12,883 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:13,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:16,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:16,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:16,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:51:16,366 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:16,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1663138235] [2022-01-31 17:51:16,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1663138235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:16,367 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:16,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-01-31 17:51:16,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404565716] [2022-01-31 17:51:16,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:16,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-01-31 17:51:16,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:16,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-01-31 17:51:16,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6107, Invalid=6325, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 17:51:16,370 INFO L87 Difference]: Start difference. First operand 896 states and 904 transitions. Second operand has 112 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 111 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:23,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:23,890 INFO L93 Difference]: Finished difference Result 1685 states and 1708 transitions. [2022-01-31 17:51:23,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2022-01-31 17:51:23,890 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 111 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 891 [2022-01-31 17:51:23,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:23,891 INFO L225 Difference]: With dead ends: 1685 [2022-01-31 17:51:23,891 INFO L226 Difference]: Without dead ends: 904 [2022-01-31 17:51:23,893 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 219 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5994 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=18315, Invalid=30305, Unknown=0, NotChecked=0, Total=48620 [2022-01-31 17:51:23,894 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 958 mSolverCounterSat, 3777 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 4735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3777 IncrementalHoareTripleChecker+Valid, 958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:23,894 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 4735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3777 Valid, 958 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:51:23,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 904 states. [2022-01-31 17:51:23,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 904 to 904. [2022-01-31 17:51:23,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 904 states, 898 states have (on average 1.010022271714922) internal successors, (907), 898 states have internal predecessors, (907), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:23,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 904 states to 904 states and 912 transitions. [2022-01-31 17:51:23,909 INFO L78 Accepts]: Start accepts. Automaton has 904 states and 912 transitions. Word has length 891 [2022-01-31 17:51:23,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:23,909 INFO L470 AbstractCegarLoop]: Abstraction has 904 states and 912 transitions. [2022-01-31 17:51:23,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 1.2321428571428572) internal successors, (138), 111 states have internal predecessors, (138), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:23,909 INFO L276 IsEmpty]: Start isEmpty. Operand 904 states and 912 transitions. [2022-01-31 17:51:23,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 900 [2022-01-31 17:51:23,913 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:23,913 INFO L514 BasicCegarLoop]: trace histogram [109, 109, 109, 109, 109, 109, 109, 109, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:23,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 17:51:23,913 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:23,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:23,913 INFO L85 PathProgramCache]: Analyzing trace with hash -546990041, now seen corresponding path program 109 times [2022-01-31 17:51:23,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:23,913 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928208024] [2022-01-31 17:51:23,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:23,914 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:23,914 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:23,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:23,970 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:28,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:28,079 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 17:51:28,079 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:28,079 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928208024] [2022-01-31 17:51:28,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928208024] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:28,079 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:28,079 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-01-31 17:51:28,079 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015974250] [2022-01-31 17:51:28,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:28,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-01-31 17:51:28,080 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-01-31 17:51:28,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6218, Invalid=6438, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 17:51:28,083 INFO L87 Difference]: Start difference. First operand 904 states and 912 transitions. Second operand has 113 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 112 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:34,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:34,814 INFO L93 Difference]: Finished difference Result 1700 states and 1723 transitions. [2022-01-31 17:51:34,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-01-31 17:51:34,814 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 112 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 899 [2022-01-31 17:51:34,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:34,815 INFO L225 Difference]: With dead ends: 1700 [2022-01-31 17:51:34,815 INFO L226 Difference]: Without dead ends: 912 [2022-01-31 17:51:34,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6104 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=18648, Invalid=30858, Unknown=0, NotChecked=0, Total=49506 [2022-01-31 17:51:34,817 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1004 mSolverCounterSat, 3909 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 4913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3909 IncrementalHoareTripleChecker+Valid, 1004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:34,818 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 4913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3909 Valid, 1004 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 17:51:34,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2022-01-31 17:51:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 912. [2022-01-31 17:51:34,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 906 states have (on average 1.009933774834437) internal successors, (915), 906 states have internal predecessors, (915), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:34,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 920 transitions. [2022-01-31 17:51:34,833 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 920 transitions. Word has length 899 [2022-01-31 17:51:34,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:34,833 INFO L470 AbstractCegarLoop]: Abstraction has 912 states and 920 transitions. [2022-01-31 17:51:34,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.2300884955752212) internal successors, (139), 112 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:34,833 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 920 transitions. [2022-01-31 17:51:34,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 908 [2022-01-31 17:51:34,836 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:34,836 INFO L514 BasicCegarLoop]: trace histogram [110, 110, 110, 110, 110, 110, 110, 110, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:34,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 17:51:34,837 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:34,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:34,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1434366421, now seen corresponding path program 110 times [2022-01-31 17:51:34,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:34,837 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [208475247] [2022-01-31 17:51:34,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:34,838 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:34,838 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:34,838 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:34,893 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:35,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:39,594 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 17:51:39,595 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:39,595 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [208475247] [2022-01-31 17:51:39,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [208475247] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:39,595 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:39,595 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-01-31 17:51:39,595 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652118805] [2022-01-31 17:51:39,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:39,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-01-31 17:51:39,595 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-01-31 17:51:39,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6330, Invalid=6552, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 17:51:39,598 INFO L87 Difference]: Start difference. First operand 912 states and 920 transitions. Second operand has 114 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 113 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:46,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:46,775 INFO L93 Difference]: Finished difference Result 1715 states and 1738 transitions. [2022-01-31 17:51:46,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-01-31 17:51:46,775 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 113 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 907 [2022-01-31 17:51:46,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:46,776 INFO L225 Difference]: With dead ends: 1715 [2022-01-31 17:51:46,776 INFO L226 Difference]: Without dead ends: 920 [2022-01-31 17:51:46,782 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 226 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6215 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18984, Invalid=31416, Unknown=0, NotChecked=0, Total=50400 [2022-01-31 17:51:46,782 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 4633 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4633 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:46,782 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 5588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4633 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:51:46,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 920 states. [2022-01-31 17:51:46,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 920 to 920. [2022-01-31 17:51:46,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 914 states have (on average 1.0098468271334793) internal successors, (923), 914 states have internal predecessors, (923), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:46,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 928 transitions. [2022-01-31 17:51:46,798 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 928 transitions. Word has length 907 [2022-01-31 17:51:46,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:46,798 INFO L470 AbstractCegarLoop]: Abstraction has 920 states and 928 transitions. [2022-01-31 17:51:46,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.2280701754385965) internal successors, (140), 113 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:46,798 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 928 transitions. [2022-01-31 17:51:46,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 916 [2022-01-31 17:51:46,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:46,802 INFO L514 BasicCegarLoop]: trace histogram [111, 111, 111, 111, 111, 111, 111, 111, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:46,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 17:51:46,802 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:46,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:46,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1898540711, now seen corresponding path program 111 times [2022-01-31 17:51:46,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:46,802 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1348818305] [2022-01-31 17:51:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:46,803 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:46,803 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:46,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:46,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:47,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:51,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:51:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:51:51,064 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 17:51:51,064 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:51:51,064 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1348818305] [2022-01-31 17:51:51,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1348818305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:51:51,064 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:51:51,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-01-31 17:51:51,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778690694] [2022-01-31 17:51:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:51:51,064 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-01-31 17:51:51,064 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:51:51,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-01-31 17:51:51,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6443, Invalid=6667, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 17:51:51,067 INFO L87 Difference]: Start difference. First operand 920 states and 928 transitions. Second operand has 115 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 114 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:58,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:51:58,647 INFO L93 Difference]: Finished difference Result 1730 states and 1753 transitions. [2022-01-31 17:51:58,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-01-31 17:51:58,647 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 114 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 915 [2022-01-31 17:51:58,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:51:58,649 INFO L225 Difference]: With dead ends: 1730 [2022-01-31 17:51:58,649 INFO L226 Difference]: Without dead ends: 928 [2022-01-31 17:51:58,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6327 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=19323, Invalid=31979, Unknown=0, NotChecked=0, Total=51302 [2022-01-31 17:51:58,652 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 982 mSolverCounterSat, 4568 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4568 IncrementalHoareTripleChecker+Valid, 982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 17:51:58,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 5550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4568 Valid, 982 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 17:51:58,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 928 states. [2022-01-31 17:51:58,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 928 to 928. [2022-01-31 17:51:58,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 922 states have (on average 1.009761388286334) internal successors, (931), 922 states have internal predecessors, (931), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:51:58,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 936 transitions. [2022-01-31 17:51:58,670 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 936 transitions. Word has length 915 [2022-01-31 17:51:58,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:51:58,670 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 936 transitions. [2022-01-31 17:51:58,670 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.2260869565217392) internal successors, (141), 114 states have internal predecessors, (141), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:51:58,670 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 936 transitions. [2022-01-31 17:51:58,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 924 [2022-01-31 17:51:58,673 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:51:58,673 INFO L514 BasicCegarLoop]: trace histogram [112, 112, 112, 112, 112, 112, 112, 112, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:51:58,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 17:51:58,674 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:51:58,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:51:58,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1501081429, now seen corresponding path program 112 times [2022-01-31 17:51:58,674 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:51:58,674 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [420751553] [2022-01-31 17:51:58,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:51:58,675 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:51:58,675 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:51:58,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:51:58,742 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:51:59,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:03,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:03,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:03,135 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 17:52:03,135 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:03,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [420751553] [2022-01-31 17:52:03,135 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [420751553] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:03,135 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:03,135 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-01-31 17:52:03,135 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563916798] [2022-01-31 17:52:03,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:03,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-01-31 17:52:03,136 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:03,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-01-31 17:52:03,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6557, Invalid=6783, Unknown=0, NotChecked=0, Total=13340 [2022-01-31 17:52:03,137 INFO L87 Difference]: Start difference. First operand 928 states and 936 transitions. Second operand has 116 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 115 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:12,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:12,659 INFO L93 Difference]: Finished difference Result 1745 states and 1768 transitions. [2022-01-31 17:52:12,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2022-01-31 17:52:12,660 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 115 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 923 [2022-01-31 17:52:12,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:12,673 INFO L225 Difference]: With dead ends: 1745 [2022-01-31 17:52:12,673 INFO L226 Difference]: Without dead ends: 936 [2022-01-31 17:52:12,676 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 227 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6440 ImplicationChecksByTransitivity, 8.4s TimeCoverageRelationStatistics Valid=19665, Invalid=32547, Unknown=0, NotChecked=0, Total=52212 [2022-01-31 17:52:12,676 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 971 mSolverCounterSat, 4410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 5381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4410 IncrementalHoareTripleChecker+Valid, 971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:12,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 48 Invalid, 5381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4410 Valid, 971 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:52:12,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 936 states. [2022-01-31 17:52:12,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 936 to 936. [2022-01-31 17:52:12,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 936 states, 930 states have (on average 1.0096774193548388) internal successors, (939), 930 states have internal predecessors, (939), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:12,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 936 states to 936 states and 944 transitions. [2022-01-31 17:52:12,698 INFO L78 Accepts]: Start accepts. Automaton has 936 states and 944 transitions. Word has length 923 [2022-01-31 17:52:12,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:12,698 INFO L470 AbstractCegarLoop]: Abstraction has 936 states and 944 transitions. [2022-01-31 17:52:12,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 1.2241379310344827) internal successors, (142), 115 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:12,698 INFO L276 IsEmpty]: Start isEmpty. Operand 936 states and 944 transitions. [2022-01-31 17:52:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 932 [2022-01-31 17:52:12,702 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:12,702 INFO L514 BasicCegarLoop]: trace histogram [113, 113, 113, 113, 113, 113, 113, 113, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:12,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 17:52:12,702 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:12,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash -522558169, now seen corresponding path program 113 times [2022-01-31 17:52:12,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:12,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867400868] [2022-01-31 17:52:12,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:12,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:12,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:12,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:12,769 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:16,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:16,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:16,832 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:16,832 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867400868] [2022-01-31 17:52:16,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867400868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:16,832 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:16,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-01-31 17:52:16,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83106628] [2022-01-31 17:52:16,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:16,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-01-31 17:52:16,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:16,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-01-31 17:52:16,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6672, Invalid=6900, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 17:52:16,835 INFO L87 Difference]: Start difference. First operand 936 states and 944 transitions. Second operand has 117 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 116 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:25,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:25,251 INFO L93 Difference]: Finished difference Result 1760 states and 1783 transitions. [2022-01-31 17:52:25,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-01-31 17:52:25,251 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 116 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 931 [2022-01-31 17:52:25,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:25,252 INFO L225 Difference]: With dead ends: 1760 [2022-01-31 17:52:25,253 INFO L226 Difference]: Without dead ends: 944 [2022-01-31 17:52:25,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6554 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=20010, Invalid=33120, Unknown=0, NotChecked=0, Total=53130 [2022-01-31 17:52:25,255 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1074 mSolverCounterSat, 4445 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4445 IncrementalHoareTripleChecker+Valid, 1074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:25,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4445 Valid, 1074 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:52:25,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 944 states. [2022-01-31 17:52:25,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 944 to 944. [2022-01-31 17:52:25,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 944 states, 938 states have (on average 1.0095948827292112) internal successors, (947), 938 states have internal predecessors, (947), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 944 states to 944 states and 952 transitions. [2022-01-31 17:52:25,272 INFO L78 Accepts]: Start accepts. Automaton has 944 states and 952 transitions. Word has length 931 [2022-01-31 17:52:25,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:25,272 INFO L470 AbstractCegarLoop]: Abstraction has 944 states and 952 transitions. [2022-01-31 17:52:25,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.2222222222222223) internal successors, (143), 116 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:25,272 INFO L276 IsEmpty]: Start isEmpty. Operand 944 states and 952 transitions. [2022-01-31 17:52:25,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 940 [2022-01-31 17:52:25,276 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:25,276 INFO L514 BasicCegarLoop]: trace histogram [114, 114, 114, 114, 114, 114, 114, 114, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:25,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 17:52:25,276 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:25,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:25,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1016312619, now seen corresponding path program 114 times [2022-01-31 17:52:25,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:25,277 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [998840022] [2022-01-31 17:52:25,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:25,277 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:25,277 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:25,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:25,347 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:25,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:29,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:29,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:29,393 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 17:52:29,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:29,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [998840022] [2022-01-31 17:52:29,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [998840022] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:29,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:29,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-01-31 17:52:29,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035155456] [2022-01-31 17:52:29,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:29,393 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-01-31 17:52:29,393 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:29,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-01-31 17:52:29,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6788, Invalid=7018, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 17:52:29,395 INFO L87 Difference]: Start difference. First operand 944 states and 952 transitions. Second operand has 118 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 117 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:37,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:37,340 INFO L93 Difference]: Finished difference Result 1775 states and 1798 transitions. [2022-01-31 17:52:37,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2022-01-31 17:52:37,341 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 117 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 939 [2022-01-31 17:52:37,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:37,342 INFO L225 Difference]: With dead ends: 1775 [2022-01-31 17:52:37,342 INFO L226 Difference]: Without dead ends: 952 [2022-01-31 17:52:37,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 234 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 231 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6669 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=20358, Invalid=33698, Unknown=0, NotChecked=0, Total=54056 [2022-01-31 17:52:37,344 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1063 mSolverCounterSat, 4236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4236 IncrementalHoareTripleChecker+Valid, 1063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:37,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 5299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4236 Valid, 1063 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:52:37,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 952 states. [2022-01-31 17:52:37,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 952 to 952. [2022-01-31 17:52:37,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 952 states, 946 states have (on average 1.0095137420718816) internal successors, (955), 946 states have internal predecessors, (955), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:37,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 952 states to 952 states and 960 transitions. [2022-01-31 17:52:37,361 INFO L78 Accepts]: Start accepts. Automaton has 952 states and 960 transitions. Word has length 939 [2022-01-31 17:52:37,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:37,361 INFO L470 AbstractCegarLoop]: Abstraction has 952 states and 960 transitions. [2022-01-31 17:52:37,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 1.2203389830508475) internal successors, (144), 117 states have internal predecessors, (144), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:37,361 INFO L276 IsEmpty]: Start isEmpty. Operand 952 states and 960 transitions. [2022-01-31 17:52:37,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 948 [2022-01-31 17:52:37,365 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:37,365 INFO L514 BasicCegarLoop]: trace histogram [115, 115, 115, 115, 115, 115, 115, 115, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:37,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 17:52:37,365 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:37,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:37,365 INFO L85 PathProgramCache]: Analyzing trace with hash 1108900775, now seen corresponding path program 115 times [2022-01-31 17:52:37,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:37,365 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [713246362] [2022-01-31 17:52:37,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:37,366 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:37,366 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:37,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:37,433 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:37,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:42,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:42,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:42,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:42,368 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:42,369 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [713246362] [2022-01-31 17:52:42,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [713246362] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:42,369 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:42,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-01-31 17:52:42,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331539712] [2022-01-31 17:52:42,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:42,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-01-31 17:52:42,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:42,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-01-31 17:52:42,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6905, Invalid=7137, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 17:52:42,372 INFO L87 Difference]: Start difference. First operand 952 states and 960 transitions. Second operand has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 118 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:52:52,690 INFO L93 Difference]: Finished difference Result 1790 states and 1813 transitions. [2022-01-31 17:52:52,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-01-31 17:52:52,690 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 118 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 947 [2022-01-31 17:52:52,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:52:52,692 INFO L225 Difference]: With dead ends: 1790 [2022-01-31 17:52:52,692 INFO L226 Difference]: Without dead ends: 960 [2022-01-31 17:52:52,694 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6785 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=20709, Invalid=34281, Unknown=0, NotChecked=0, Total=54990 [2022-01-31 17:52:52,695 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 4443 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4443 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:52:52,695 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4443 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:52:52,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 960 states. [2022-01-31 17:52:52,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 960 to 960. [2022-01-31 17:52:52,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 960 states, 954 states have (on average 1.009433962264151) internal successors, (963), 954 states have internal predecessors, (963), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:52:52,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 960 states to 960 states and 968 transitions. [2022-01-31 17:52:52,712 INFO L78 Accepts]: Start accepts. Automaton has 960 states and 968 transitions. Word has length 947 [2022-01-31 17:52:52,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:52:52,712 INFO L470 AbstractCegarLoop]: Abstraction has 960 states and 968 transitions. [2022-01-31 17:52:52,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.218487394957983) internal successors, (145), 118 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:52:52,712 INFO L276 IsEmpty]: Start isEmpty. Operand 960 states and 968 transitions. [2022-01-31 17:52:52,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 956 [2022-01-31 17:52:52,716 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:52:52,716 INFO L514 BasicCegarLoop]: trace histogram [116, 116, 116, 116, 116, 116, 116, 116, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:52:52,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 17:52:52,716 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:52:52,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:52:52,717 INFO L85 PathProgramCache]: Analyzing trace with hash -175737429, now seen corresponding path program 116 times [2022-01-31 17:52:52,717 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:52:52,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [567464966] [2022-01-31 17:52:52,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:52:52,718 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:52:52,718 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:52:52,718 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:52:52,796 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:52:53,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:57,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:52:57,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:52:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:52:57,771 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:52:57,771 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [567464966] [2022-01-31 17:52:57,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [567464966] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:52:57,771 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:52:57,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-01-31 17:52:57,771 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837513491] [2022-01-31 17:52:57,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:52:57,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-01-31 17:52:57,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:52:57,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-01-31 17:52:57,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7023, Invalid=7257, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 17:52:57,775 INFO L87 Difference]: Start difference. First operand 960 states and 968 transitions. Second operand has 120 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 119 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:08,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:08,316 INFO L93 Difference]: Finished difference Result 1805 states and 1828 transitions. [2022-01-31 17:53:08,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-01-31 17:53:08,316 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 119 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 955 [2022-01-31 17:53:08,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:08,318 INFO L225 Difference]: With dead ends: 1805 [2022-01-31 17:53:08,318 INFO L226 Difference]: Without dead ends: 968 [2022-01-31 17:53:08,320 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6902 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=21063, Invalid=34869, Unknown=0, NotChecked=0, Total=55932 [2022-01-31 17:53:08,320 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1022 mSolverCounterSat, 4538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 5560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4538 IncrementalHoareTripleChecker+Valid, 1022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:08,320 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 5560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4538 Valid, 1022 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:53:08,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 968 states. [2022-01-31 17:53:08,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 968 to 968. [2022-01-31 17:53:08,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 968 states, 962 states have (on average 1.0093555093555093) internal successors, (971), 962 states have internal predecessors, (971), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:08,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 968 states to 968 states and 976 transitions. [2022-01-31 17:53:08,336 INFO L78 Accepts]: Start accepts. Automaton has 968 states and 976 transitions. Word has length 955 [2022-01-31 17:53:08,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:08,336 INFO L470 AbstractCegarLoop]: Abstraction has 968 states and 976 transitions. [2022-01-31 17:53:08,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.2166666666666666) internal successors, (146), 119 states have internal predecessors, (146), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 968 states and 976 transitions. [2022-01-31 17:53:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 964 [2022-01-31 17:53:08,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:08,340 INFO L514 BasicCegarLoop]: trace histogram [117, 117, 117, 117, 117, 117, 117, 117, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:08,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 17:53:08,341 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:08,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:08,341 INFO L85 PathProgramCache]: Analyzing trace with hash -964447705, now seen corresponding path program 117 times [2022-01-31 17:53:08,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:08,341 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [790666351] [2022-01-31 17:53:08,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:08,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:08,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:08,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:08,411 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:08,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:13,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:13,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:13,697 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 17:53:13,697 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:13,697 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [790666351] [2022-01-31 17:53:13,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [790666351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:13,697 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:13,697 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-01-31 17:53:13,697 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685638553] [2022-01-31 17:53:13,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:13,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-01-31 17:53:13,697 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:13,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-01-31 17:53:13,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7142, Invalid=7378, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 17:53:13,699 INFO L87 Difference]: Start difference. First operand 968 states and 976 transitions. Second operand has 121 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 120 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:23,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:23,964 INFO L93 Difference]: Finished difference Result 1820 states and 1843 transitions. [2022-01-31 17:53:23,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-01-31 17:53:23,965 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 120 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 963 [2022-01-31 17:53:23,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:23,966 INFO L225 Difference]: With dead ends: 1820 [2022-01-31 17:53:23,966 INFO L226 Difference]: Without dead ends: 976 [2022-01-31 17:53:23,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7020 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=21420, Invalid=35462, Unknown=0, NotChecked=0, Total=56882 [2022-01-31 17:53:23,968 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 4499 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5586 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4499 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:23,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 5586 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4499 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:53:23,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 976 states. [2022-01-31 17:53:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 976 to 976. [2022-01-31 17:53:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 976 states, 970 states have (on average 1.0092783505154639) internal successors, (979), 970 states have internal predecessors, (979), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:23,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 976 states to 976 states and 984 transitions. [2022-01-31 17:53:23,985 INFO L78 Accepts]: Start accepts. Automaton has 976 states and 984 transitions. Word has length 963 [2022-01-31 17:53:23,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:23,985 INFO L470 AbstractCegarLoop]: Abstraction has 976 states and 984 transitions. [2022-01-31 17:53:23,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.2148760330578512) internal successors, (147), 120 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 976 states and 984 transitions. [2022-01-31 17:53:23,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 972 [2022-01-31 17:53:23,989 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:23,989 INFO L514 BasicCegarLoop]: trace histogram [118, 118, 118, 118, 118, 118, 118, 118, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:23,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 17:53:23,989 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:23,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:23,990 INFO L85 PathProgramCache]: Analyzing trace with hash 1547671595, now seen corresponding path program 118 times [2022-01-31 17:53:23,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:23,990 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718842380] [2022-01-31 17:53:23,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:23,991 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:23,991 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:23,991 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:24,063 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:24,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:29,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:29,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:29,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:29,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:29,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718842380] [2022-01-31 17:53:29,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718842380] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:29,310 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:29,310 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-01-31 17:53:29,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028250435] [2022-01-31 17:53:29,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:29,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-01-31 17:53:29,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:29,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-01-31 17:53:29,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7262, Invalid=7500, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 17:53:29,312 INFO L87 Difference]: Start difference. First operand 976 states and 984 transitions. Second operand has 122 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:40,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:40,254 INFO L93 Difference]: Finished difference Result 1835 states and 1858 transitions. [2022-01-31 17:53:40,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2022-01-31 17:53:40,254 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 971 [2022-01-31 17:53:40,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:40,256 INFO L225 Difference]: With dead ends: 1835 [2022-01-31 17:53:40,256 INFO L226 Difference]: Without dead ends: 984 [2022-01-31 17:53:40,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 239 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7139 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=21780, Invalid=36060, Unknown=0, NotChecked=0, Total=57840 [2022-01-31 17:53:40,259 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1038 mSolverCounterSat, 5086 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5086 IncrementalHoareTripleChecker+Valid, 1038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:40,259 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5086 Valid, 1038 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:53:40,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 984 states. [2022-01-31 17:53:40,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 984 to 984. [2022-01-31 17:53:40,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 978 states have (on average 1.00920245398773) internal successors, (987), 978 states have internal predecessors, (987), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:40,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 992 transitions. [2022-01-31 17:53:40,276 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 992 transitions. Word has length 971 [2022-01-31 17:53:40,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:40,276 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 992 transitions. [2022-01-31 17:53:40,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 1.2131147540983607) internal successors, (148), 121 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:40,277 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 992 transitions. [2022-01-31 17:53:40,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 980 [2022-01-31 17:53:40,280 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:40,281 INFO L514 BasicCegarLoop]: trace histogram [119, 119, 119, 119, 119, 119, 119, 119, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:40,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 17:53:40,281 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1111750489, now seen corresponding path program 119 times [2022-01-31 17:53:40,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:40,281 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925250852] [2022-01-31 17:53:40,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:40,282 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:40,282 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:40,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:40,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:40,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:45,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:45,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:53:45,499 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:45,499 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925250852] [2022-01-31 17:53:45,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925250852] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:45,499 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:45,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-01-31 17:53:45,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737211642] [2022-01-31 17:53:45,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:45,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-01-31 17:53:45,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:45,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-01-31 17:53:45,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7383, Invalid=7623, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 17:53:45,503 INFO L87 Difference]: Start difference. First operand 984 states and 992 transitions. Second operand has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 122 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:54,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:53:54,662 INFO L93 Difference]: Finished difference Result 1850 states and 1873 transitions. [2022-01-31 17:53:54,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-01-31 17:53:54,662 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 122 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 979 [2022-01-31 17:53:54,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:53:54,663 INFO L225 Difference]: With dead ends: 1850 [2022-01-31 17:53:54,663 INFO L226 Difference]: Without dead ends: 992 [2022-01-31 17:53:54,665 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7259 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=22143, Invalid=36663, Unknown=0, NotChecked=0, Total=58806 [2022-01-31 17:53:54,666 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1122 mSolverCounterSat, 4577 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5699 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4577 IncrementalHoareTripleChecker+Valid, 1122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:53:54,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5699 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4577 Valid, 1122 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:53:54,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2022-01-31 17:53:54,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 992. [2022-01-31 17:53:54,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 992 states, 986 states have (on average 1.0091277890466532) internal successors, (995), 986 states have internal predecessors, (995), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:53:54,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 992 states to 992 states and 1000 transitions. [2022-01-31 17:53:54,681 INFO L78 Accepts]: Start accepts. Automaton has 992 states and 1000 transitions. Word has length 979 [2022-01-31 17:53:54,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:53:54,681 INFO L470 AbstractCegarLoop]: Abstraction has 992 states and 1000 transitions. [2022-01-31 17:53:54,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.2113821138211383) internal successors, (149), 122 states have internal predecessors, (149), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:53:54,682 INFO L276 IsEmpty]: Start isEmpty. Operand 992 states and 1000 transitions. [2022-01-31 17:53:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 988 [2022-01-31 17:53:54,685 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:53:54,685 INFO L514 BasicCegarLoop]: trace histogram [120, 120, 120, 120, 120, 120, 120, 120, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:53:54,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 17:53:54,686 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:53:54,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:53:54,686 INFO L85 PathProgramCache]: Analyzing trace with hash -39904597, now seen corresponding path program 120 times [2022-01-31 17:53:54,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:53:54,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2113128854] [2022-01-31 17:53:54,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:53:54,695 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:53:54,696 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:53:54,696 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:53:54,764 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:53:55,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:58,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:53:58,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:53:58,976 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 17:53:58,976 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:53:58,976 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2113128854] [2022-01-31 17:53:58,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2113128854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:53:58,976 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:53:58,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-01-31 17:53:58,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433121389] [2022-01-31 17:53:58,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:53:58,977 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-01-31 17:53:58,977 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:53:58,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-01-31 17:53:58,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7505, Invalid=7747, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 17:53:58,980 INFO L87 Difference]: Start difference. First operand 992 states and 1000 transitions. Second operand has 124 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 123 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:07,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:07,704 INFO L93 Difference]: Finished difference Result 1865 states and 1888 transitions. [2022-01-31 17:54:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-01-31 17:54:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 123 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 987 [2022-01-31 17:54:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:07,705 INFO L225 Difference]: With dead ends: 1865 [2022-01-31 17:54:07,705 INFO L226 Difference]: Without dead ends: 1000 [2022-01-31 17:54:07,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7380 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=22509, Invalid=37271, Unknown=0, NotChecked=0, Total=59780 [2022-01-31 17:54:07,708 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1073 mSolverCounterSat, 4411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 5484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4411 IncrementalHoareTripleChecker+Valid, 1073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:07,708 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 58 Invalid, 5484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4411 Valid, 1073 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:54:07,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1000 states. [2022-01-31 17:54:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1000 to 1000. [2022-01-31 17:54:07,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1000 states, 994 states have (on average 1.0090543259557343) internal successors, (1003), 994 states have internal predecessors, (1003), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:07,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1000 states to 1000 states and 1008 transitions. [2022-01-31 17:54:07,723 INFO L78 Accepts]: Start accepts. Automaton has 1000 states and 1008 transitions. Word has length 987 [2022-01-31 17:54:07,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:07,724 INFO L470 AbstractCegarLoop]: Abstraction has 1000 states and 1008 transitions. [2022-01-31 17:54:07,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.2096774193548387) internal successors, (150), 123 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:07,724 INFO L276 IsEmpty]: Start isEmpty. Operand 1000 states and 1008 transitions. [2022-01-31 17:54:07,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 996 [2022-01-31 17:54:07,728 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:07,728 INFO L514 BasicCegarLoop]: trace histogram [121, 121, 121, 121, 121, 121, 121, 121, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:07,728 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 17:54:07,728 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:07,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:07,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1788772569, now seen corresponding path program 121 times [2022-01-31 17:54:07,728 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:07,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592976614] [2022-01-31 17:54:07,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:07,729 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:07,729 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:07,729 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:07,798 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:08,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:12,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:12,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:12,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:12,405 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:12,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592976614] [2022-01-31 17:54:12,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592976614] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:12,405 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:12,405 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [125] imperfect sequences [] total 125 [2022-01-31 17:54:12,405 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727896523] [2022-01-31 17:54:12,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:12,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2022-01-31 17:54:12,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:12,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2022-01-31 17:54:12,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7628, Invalid=7872, Unknown=0, NotChecked=0, Total=15500 [2022-01-31 17:54:12,409 INFO L87 Difference]: Start difference. First operand 1000 states and 1008 transitions. Second operand has 125 states, 125 states have (on average 1.208) internal successors, (151), 124 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:21,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:21,696 INFO L93 Difference]: Finished difference Result 1880 states and 1903 transitions. [2022-01-31 17:54:21,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-01-31 17:54:21,696 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 1.208) internal successors, (151), 124 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 995 [2022-01-31 17:54:21,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:21,697 INFO L225 Difference]: With dead ends: 1880 [2022-01-31 17:54:21,697 INFO L226 Difference]: Without dead ends: 1008 [2022-01-31 17:54:21,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7502 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=22878, Invalid=37884, Unknown=0, NotChecked=0, Total=60762 [2022-01-31 17:54:21,700 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1138 mSolverCounterSat, 4032 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5170 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4032 IncrementalHoareTripleChecker+Valid, 1138 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:21,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5170 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4032 Valid, 1138 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 17:54:21,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1008 states. [2022-01-31 17:54:21,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1008 to 1008. [2022-01-31 17:54:21,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1008 states, 1002 states have (on average 1.0089820359281436) internal successors, (1011), 1002 states have internal predecessors, (1011), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:21,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1008 states to 1008 states and 1016 transitions. [2022-01-31 17:54:21,715 INFO L78 Accepts]: Start accepts. Automaton has 1008 states and 1016 transitions. Word has length 995 [2022-01-31 17:54:21,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:21,716 INFO L470 AbstractCegarLoop]: Abstraction has 1008 states and 1016 transitions. [2022-01-31 17:54:21,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 1.208) internal successors, (151), 124 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:21,716 INFO L276 IsEmpty]: Start isEmpty. Operand 1008 states and 1016 transitions. [2022-01-31 17:54:21,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1004 [2022-01-31 17:54:21,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:21,720 INFO L514 BasicCegarLoop]: trace histogram [122, 122, 122, 122, 122, 122, 122, 122, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:21,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 17:54:21,720 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:21,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:21,720 INFO L85 PathProgramCache]: Analyzing trace with hash 1753546027, now seen corresponding path program 122 times [2022-01-31 17:54:21,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:21,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [843966319] [2022-01-31 17:54:21,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:21,721 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:21,721 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:21,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:21,792 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:22,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:27,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:27,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:27,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:27,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [843966319] [2022-01-31 17:54:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [843966319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:27,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:27,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-01-31 17:54:27,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1241198706] [2022-01-31 17:54:27,114 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-01-31 17:54:27,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-01-31 17:54:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7752, Invalid=7998, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 17:54:27,115 INFO L87 Difference]: Start difference. First operand 1008 states and 1016 transitions. Second operand has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 125 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:36,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:36,880 INFO L93 Difference]: Finished difference Result 1895 states and 1918 transitions. [2022-01-31 17:54:36,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-01-31 17:54:36,881 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 125 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1003 [2022-01-31 17:54:36,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:36,882 INFO L225 Difference]: With dead ends: 1895 [2022-01-31 17:54:36,882 INFO L226 Difference]: Without dead ends: 1016 [2022-01-31 17:54:36,884 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7625 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=23250, Invalid=38502, Unknown=0, NotChecked=0, Total=61752 [2022-01-31 17:54:36,884 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1146 mSolverCounterSat, 4609 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5755 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4609 IncrementalHoareTripleChecker+Valid, 1146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:36,884 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5755 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4609 Valid, 1146 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:54:36,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1016 states. [2022-01-31 17:54:36,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1016 to 1016. [2022-01-31 17:54:36,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1016 states, 1010 states have (on average 1.008910891089109) internal successors, (1019), 1010 states have internal predecessors, (1019), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:36,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1016 states to 1016 states and 1024 transitions. [2022-01-31 17:54:36,902 INFO L78 Accepts]: Start accepts. Automaton has 1016 states and 1024 transitions. Word has length 1003 [2022-01-31 17:54:36,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:36,902 INFO L470 AbstractCegarLoop]: Abstraction has 1016 states and 1024 transitions. [2022-01-31 17:54:36,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.2063492063492063) internal successors, (152), 125 states have internal predecessors, (152), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:36,902 INFO L276 IsEmpty]: Start isEmpty. Operand 1016 states and 1024 transitions. [2022-01-31 17:54:36,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1012 [2022-01-31 17:54:36,907 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:36,907 INFO L514 BasicCegarLoop]: trace histogram [123, 123, 123, 123, 123, 123, 123, 123, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:36,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 17:54:36,908 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:36,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:36,908 INFO L85 PathProgramCache]: Analyzing trace with hash -652995161, now seen corresponding path program 123 times [2022-01-31 17:54:36,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:36,908 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447251958] [2022-01-31 17:54:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:36,909 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:36,909 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:36,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:36,977 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:37,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:42,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:42,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:42,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:42,344 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:42,344 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447251958] [2022-01-31 17:54:42,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [447251958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:42,345 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:42,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [127] imperfect sequences [] total 127 [2022-01-31 17:54:42,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460280227] [2022-01-31 17:54:42,345 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:42,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2022-01-31 17:54:42,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:42,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2022-01-31 17:54:42,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7877, Invalid=8125, Unknown=0, NotChecked=0, Total=16002 [2022-01-31 17:54:42,348 INFO L87 Difference]: Start difference. First operand 1016 states and 1024 transitions. Second operand has 127 states, 127 states have (on average 1.204724409448819) internal successors, (153), 126 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:52,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:54:52,552 INFO L93 Difference]: Finished difference Result 1910 states and 1933 transitions. [2022-01-31 17:54:52,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-01-31 17:54:52,552 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 1.204724409448819) internal successors, (153), 126 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1011 [2022-01-31 17:54:52,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:54:52,553 INFO L225 Difference]: With dead ends: 1910 [2022-01-31 17:54:52,553 INFO L226 Difference]: Without dead ends: 1024 [2022-01-31 17:54:52,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 252 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7749 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=23625, Invalid=39125, Unknown=0, NotChecked=0, Total=62750 [2022-01-31 17:54:52,556 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1116 mSolverCounterSat, 4551 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4551 IncrementalHoareTripleChecker+Valid, 1116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:54:52,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4551 Valid, 1116 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:54:52,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1024 states. [2022-01-31 17:54:52,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1024 to 1024. [2022-01-31 17:54:52,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1024 states, 1018 states have (on average 1.0088408644400786) internal successors, (1027), 1018 states have internal predecessors, (1027), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:54:52,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1024 states to 1024 states and 1032 transitions. [2022-01-31 17:54:52,573 INFO L78 Accepts]: Start accepts. Automaton has 1024 states and 1032 transitions. Word has length 1011 [2022-01-31 17:54:52,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:54:52,573 INFO L470 AbstractCegarLoop]: Abstraction has 1024 states and 1032 transitions. [2022-01-31 17:54:52,573 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 1.204724409448819) internal successors, (153), 126 states have internal predecessors, (153), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:54:52,573 INFO L276 IsEmpty]: Start isEmpty. Operand 1024 states and 1032 transitions. [2022-01-31 17:54:52,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1020 [2022-01-31 17:54:52,577 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:54:52,578 INFO L514 BasicCegarLoop]: trace histogram [124, 124, 124, 124, 124, 124, 124, 124, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:54:52,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 17:54:52,579 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:54:52,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:54:52,579 INFO L85 PathProgramCache]: Analyzing trace with hash 768688043, now seen corresponding path program 124 times [2022-01-31 17:54:52,579 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:54:52,579 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1307837090] [2022-01-31 17:54:52,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:54:52,580 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:54:52,580 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:54:52,580 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:54:52,652 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:54:53,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:57,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:54:57,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:54:57,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:54:57,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:54:57,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1307837090] [2022-01-31 17:54:57,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1307837090] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:54:57,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:54:57,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-01-31 17:54:57,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688546879] [2022-01-31 17:54:57,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:54:57,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-01-31 17:54:57,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:54:57,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-01-31 17:54:57,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8003, Invalid=8253, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 17:54:57,280 INFO L87 Difference]: Start difference. First operand 1024 states and 1032 transitions. Second operand has 128 states, 128 states have (on average 1.203125) internal successors, (154), 127 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:06,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:06,994 INFO L93 Difference]: Finished difference Result 1925 states and 1948 transitions. [2022-01-31 17:55:06,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-01-31 17:55:06,995 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.203125) internal successors, (154), 127 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1019 [2022-01-31 17:55:06,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:06,995 INFO L225 Difference]: With dead ends: 1925 [2022-01-31 17:55:06,995 INFO L226 Difference]: Without dead ends: 1032 [2022-01-31 17:55:06,998 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 251 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7874 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=24003, Invalid=39753, Unknown=0, NotChecked=0, Total=63756 [2022-01-31 17:55:06,998 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1162 mSolverCounterSat, 4626 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 5788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4626 IncrementalHoareTripleChecker+Valid, 1162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:06,998 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 73 Invalid, 5788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4626 Valid, 1162 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:55:06,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1032 states. [2022-01-31 17:55:07,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1032 to 1032. [2022-01-31 17:55:07,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1032 states, 1026 states have (on average 1.0087719298245614) internal successors, (1035), 1026 states have internal predecessors, (1035), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:07,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1032 states to 1032 states and 1040 transitions. [2022-01-31 17:55:07,018 INFO L78 Accepts]: Start accepts. Automaton has 1032 states and 1040 transitions. Word has length 1019 [2022-01-31 17:55:07,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:07,018 INFO L470 AbstractCegarLoop]: Abstraction has 1032 states and 1040 transitions. [2022-01-31 17:55:07,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.203125) internal successors, (154), 127 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:07,018 INFO L276 IsEmpty]: Start isEmpty. Operand 1032 states and 1040 transitions. [2022-01-31 17:55:07,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1028 [2022-01-31 17:55:07,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:07,022 INFO L514 BasicCegarLoop]: trace histogram [125, 125, 125, 125, 125, 125, 125, 125, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:07,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 17:55:07,022 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:07,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:07,023 INFO L85 PathProgramCache]: Analyzing trace with hash 846449703, now seen corresponding path program 125 times [2022-01-31 17:55:07,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:07,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [340146615] [2022-01-31 17:55:07,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:07,024 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:07,024 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:07,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:07,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:07,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:12,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:12,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:12,684 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 17:55:12,684 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:12,684 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [340146615] [2022-01-31 17:55:12,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [340146615] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:12,684 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:12,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-01-31 17:55:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178039548] [2022-01-31 17:55:12,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:12,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-01-31 17:55:12,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-01-31 17:55:12,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8130, Invalid=8382, Unknown=0, NotChecked=0, Total=16512 [2022-01-31 17:55:12,688 INFO L87 Difference]: Start difference. First operand 1032 states and 1040 transitions. Second operand has 129 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 128 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:22,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:22,668 INFO L93 Difference]: Finished difference Result 1940 states and 1963 transitions. [2022-01-31 17:55:22,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-01-31 17:55:22,668 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 128 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1027 [2022-01-31 17:55:22,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:22,669 INFO L225 Difference]: With dead ends: 1940 [2022-01-31 17:55:22,669 INFO L226 Difference]: Without dead ends: 1040 [2022-01-31 17:55:22,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8000 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=24384, Invalid=40386, Unknown=0, NotChecked=0, Total=64770 [2022-01-31 17:55:22,672 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1151 mSolverCounterSat, 4318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 5469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4318 IncrementalHoareTripleChecker+Valid, 1151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:22,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 5469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4318 Valid, 1151 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:55:22,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1040 states. [2022-01-31 17:55:22,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1040 to 1040. [2022-01-31 17:55:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1040 states, 1034 states have (on average 1.0087040618955512) internal successors, (1043), 1034 states have internal predecessors, (1043), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1040 states to 1040 states and 1048 transitions. [2022-01-31 17:55:22,690 INFO L78 Accepts]: Start accepts. Automaton has 1040 states and 1048 transitions. Word has length 1027 [2022-01-31 17:55:22,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:22,690 INFO L470 AbstractCegarLoop]: Abstraction has 1040 states and 1048 transitions. [2022-01-31 17:55:22,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.2015503875968991) internal successors, (155), 128 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:22,690 INFO L276 IsEmpty]: Start isEmpty. Operand 1040 states and 1048 transitions. [2022-01-31 17:55:22,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1036 [2022-01-31 17:55:22,694 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:22,695 INFO L514 BasicCegarLoop]: trace histogram [126, 126, 126, 126, 126, 126, 126, 126, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:22,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 17:55:22,697 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:22,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:22,702 INFO L85 PathProgramCache]: Analyzing trace with hash -530324949, now seen corresponding path program 126 times [2022-01-31 17:55:22,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:22,702 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2142191440] [2022-01-31 17:55:22,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:22,706 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:22,706 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:22,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:22,786 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:27,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:27,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:27,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:55:27,630 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:27,630 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2142191440] [2022-01-31 17:55:27,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2142191440] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:27,630 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:27,630 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-01-31 17:55:27,630 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613289037] [2022-01-31 17:55:27,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:27,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-01-31 17:55:27,631 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:27,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-01-31 17:55:27,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8258, Invalid=8512, Unknown=0, NotChecked=0, Total=16770 [2022-01-31 17:55:27,635 INFO L87 Difference]: Start difference. First operand 1040 states and 1048 transitions. Second operand has 130 states, 130 states have (on average 1.2) internal successors, (156), 129 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:39,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:39,078 INFO L93 Difference]: Finished difference Result 1955 states and 1978 transitions. [2022-01-31 17:55:39,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-01-31 17:55:39,079 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.2) internal successors, (156), 129 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1035 [2022-01-31 17:55:39,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:39,080 INFO L225 Difference]: With dead ends: 1955 [2022-01-31 17:55:39,080 INFO L226 Difference]: Without dead ends: 1048 [2022-01-31 17:55:39,082 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8127 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=24768, Invalid=41024, Unknown=0, NotChecked=0, Total=65792 [2022-01-31 17:55:39,083 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1102 mSolverCounterSat, 6185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 7287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6185 IncrementalHoareTripleChecker+Valid, 1102 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:39,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 7287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6185 Valid, 1102 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:55:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2022-01-31 17:55:39,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 1048. [2022-01-31 17:55:39,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1048 states, 1042 states have (on average 1.0086372360844529) internal successors, (1051), 1042 states have internal predecessors, (1051), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:39,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1048 states to 1048 states and 1056 transitions. [2022-01-31 17:55:39,100 INFO L78 Accepts]: Start accepts. Automaton has 1048 states and 1056 transitions. Word has length 1035 [2022-01-31 17:55:39,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:39,100 INFO L470 AbstractCegarLoop]: Abstraction has 1048 states and 1056 transitions. [2022-01-31 17:55:39,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.2) internal successors, (156), 129 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:39,100 INFO L276 IsEmpty]: Start isEmpty. Operand 1048 states and 1056 transitions. [2022-01-31 17:55:39,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1044 [2022-01-31 17:55:39,104 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:39,104 INFO L514 BasicCegarLoop]: trace histogram [127, 127, 127, 127, 127, 127, 127, 127, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:39,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 17:55:39,105 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:39,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:39,105 INFO L85 PathProgramCache]: Analyzing trace with hash 1763746471, now seen corresponding path program 127 times [2022-01-31 17:55:39,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:39,105 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2080184050] [2022-01-31 17:55:39,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:39,106 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:39,106 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:39,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:39,179 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:45,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:55:45,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:55:45,107 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 17:55:45,107 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:55:45,107 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2080184050] [2022-01-31 17:55:45,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2080184050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:55:45,107 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:55:45,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [131] imperfect sequences [] total 131 [2022-01-31 17:55:45,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549805957] [2022-01-31 17:55:45,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:55:45,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2022-01-31 17:55:45,108 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:55:45,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2022-01-31 17:55:45,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8387, Invalid=8643, Unknown=0, NotChecked=0, Total=17030 [2022-01-31 17:55:45,113 INFO L87 Difference]: Start difference. First operand 1048 states and 1056 transitions. Second operand has 131 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 130 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:55,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:55:55,339 INFO L93 Difference]: Finished difference Result 1970 states and 1993 transitions. [2022-01-31 17:55:55,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-01-31 17:55:55,339 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 130 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1043 [2022-01-31 17:55:55,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:55:55,341 INFO L225 Difference]: With dead ends: 1970 [2022-01-31 17:55:55,341 INFO L226 Difference]: Without dead ends: 1056 [2022-01-31 17:55:55,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8255 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=25155, Invalid=41667, Unknown=0, NotChecked=0, Total=66822 [2022-01-31 17:55:55,344 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1148 mSolverCounterSat, 5124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 6272 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5124 IncrementalHoareTripleChecker+Valid, 1148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:55:55,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 6272 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5124 Valid, 1148 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:55:55,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1056 states. [2022-01-31 17:55:55,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1056 to 1056. [2022-01-31 17:55:55,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1050 states have (on average 1.0085714285714287) internal successors, (1059), 1050 states have internal predecessors, (1059), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:55:55,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 1064 transitions. [2022-01-31 17:55:55,362 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 1064 transitions. Word has length 1043 [2022-01-31 17:55:55,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:55:55,362 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 1064 transitions. [2022-01-31 17:55:55,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 1.1984732824427482) internal successors, (157), 130 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:55:55,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 1064 transitions. [2022-01-31 17:55:55,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1052 [2022-01-31 17:55:55,366 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:55:55,366 INFO L514 BasicCegarLoop]: trace histogram [128, 128, 128, 128, 128, 128, 128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:55:55,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 17:55:55,367 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:55:55,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:55:55,367 INFO L85 PathProgramCache]: Analyzing trace with hash 354215083, now seen corresponding path program 128 times [2022-01-31 17:55:55,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:55:55,367 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1125118050] [2022-01-31 17:55:55,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:55:55,373 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:55:55,373 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:55:55,373 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:55:55,475 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:55:55,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:00,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:00,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:00,530 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 17:56:00,530 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:00,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1125118050] [2022-01-31 17:56:00,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1125118050] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:00,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:00,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-01-31 17:56:00,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357754306] [2022-01-31 17:56:00,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:00,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-01-31 17:56:00,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:00,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-01-31 17:56:00,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8517, Invalid=8775, Unknown=0, NotChecked=0, Total=17292 [2022-01-31 17:56:00,534 INFO L87 Difference]: Start difference. First operand 1056 states and 1064 transitions. Second operand has 132 states, 132 states have (on average 1.196969696969697) internal successors, (158), 131 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:10,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:10,627 INFO L93 Difference]: Finished difference Result 1985 states and 2008 transitions. [2022-01-31 17:56:10,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-01-31 17:56:10,628 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.196969696969697) internal successors, (158), 131 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1051 [2022-01-31 17:56:10,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:10,629 INFO L225 Difference]: With dead ends: 1985 [2022-01-31 17:56:10,629 INFO L226 Difference]: Without dead ends: 1064 [2022-01-31 17:56:10,631 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8384 ImplicationChecksByTransitivity, 7.9s TimeCoverageRelationStatistics Valid=25545, Invalid=42315, Unknown=0, NotChecked=0, Total=67860 [2022-01-31 17:56:10,631 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1175 mSolverCounterSat, 4850 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 6025 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4850 IncrementalHoareTripleChecker+Valid, 1175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:10,632 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 6025 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4850 Valid, 1175 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 17:56:10,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1064 states. [2022-01-31 17:56:10,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1064 to 1064. [2022-01-31 17:56:10,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1064 states, 1058 states have (on average 1.0085066162570888) internal successors, (1067), 1058 states have internal predecessors, (1067), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:10,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1064 states to 1064 states and 1072 transitions. [2022-01-31 17:56:10,649 INFO L78 Accepts]: Start accepts. Automaton has 1064 states and 1072 transitions. Word has length 1051 [2022-01-31 17:56:10,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:10,649 INFO L470 AbstractCegarLoop]: Abstraction has 1064 states and 1072 transitions. [2022-01-31 17:56:10,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.196969696969697) internal successors, (158), 131 states have internal predecessors, (158), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:10,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1064 states and 1072 transitions. [2022-01-31 17:56:10,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1060 [2022-01-31 17:56:10,653 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:10,653 INFO L514 BasicCegarLoop]: trace histogram [129, 129, 129, 129, 129, 129, 129, 129, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:10,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 17:56:10,654 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:10,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:10,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1656396071, now seen corresponding path program 129 times [2022-01-31 17:56:10,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:10,654 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [638995782] [2022-01-31 17:56:10,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:10,655 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:10,655 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:10,655 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:10,728 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:11,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:16,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:16,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:16,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:16,399 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:16,399 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [638995782] [2022-01-31 17:56:16,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [638995782] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:16,399 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:16,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [133] imperfect sequences [] total 133 [2022-01-31 17:56:16,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184683046] [2022-01-31 17:56:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2022-01-31 17:56:16,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:16,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2022-01-31 17:56:16,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8648, Invalid=8908, Unknown=0, NotChecked=0, Total=17556 [2022-01-31 17:56:16,403 INFO L87 Difference]: Start difference. First operand 1064 states and 1072 transitions. Second operand has 133 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 132 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:27,607 INFO L93 Difference]: Finished difference Result 2000 states and 2023 transitions. [2022-01-31 17:56:27,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-01-31 17:56:27,608 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 132 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1059 [2022-01-31 17:56:27,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:27,609 INFO L225 Difference]: With dead ends: 2000 [2022-01-31 17:56:27,609 INFO L226 Difference]: Without dead ends: 1072 [2022-01-31 17:56:27,612 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8514 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=25938, Invalid=42968, Unknown=0, NotChecked=0, Total=68906 [2022-01-31 17:56:27,612 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1164 mSolverCounterSat, 4809 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 5973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4809 IncrementalHoareTripleChecker+Valid, 1164 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:27,612 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 63 Invalid, 5973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4809 Valid, 1164 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:56:27,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1072 states. [2022-01-31 17:56:27,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1072 to 1072. [2022-01-31 17:56:27,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1072 states, 1066 states have (on average 1.0084427767354596) internal successors, (1075), 1066 states have internal predecessors, (1075), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:27,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1072 states to 1072 states and 1080 transitions. [2022-01-31 17:56:27,629 INFO L78 Accepts]: Start accepts. Automaton has 1072 states and 1080 transitions. Word has length 1059 [2022-01-31 17:56:27,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:27,629 INFO L470 AbstractCegarLoop]: Abstraction has 1072 states and 1080 transitions. [2022-01-31 17:56:27,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 133 states have (on average 1.1954887218045114) internal successors, (159), 132 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:27,629 INFO L276 IsEmpty]: Start isEmpty. Operand 1072 states and 1080 transitions. [2022-01-31 17:56:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1068 [2022-01-31 17:56:27,634 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:27,634 INFO L514 BasicCegarLoop]: trace histogram [130, 130, 130, 130, 130, 130, 130, 130, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:27,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 17:56:27,634 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:27,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:27,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1658603307, now seen corresponding path program 130 times [2022-01-31 17:56:27,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:27,634 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2050061923] [2022-01-31 17:56:27,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:27,635 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:27,635 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:27,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:27,736 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:28,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:32,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:32,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:56:32,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:32,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2050061923] [2022-01-31 17:56:32,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2050061923] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:32,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:32,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-01-31 17:56:32,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454472910] [2022-01-31 17:56:32,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:32,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-01-31 17:56:32,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:32,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-01-31 17:56:32,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8780, Invalid=9042, Unknown=0, NotChecked=0, Total=17822 [2022-01-31 17:56:32,369 INFO L87 Difference]: Start difference. First operand 1072 states and 1080 transitions. Second operand has 134 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 133 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:43,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:56:43,053 INFO L93 Difference]: Finished difference Result 2015 states and 2038 transitions. [2022-01-31 17:56:43,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-01-31 17:56:43,053 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 133 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1067 [2022-01-31 17:56:43,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:56:43,054 INFO L225 Difference]: With dead ends: 2015 [2022-01-31 17:56:43,054 INFO L226 Difference]: Without dead ends: 1080 [2022-01-31 17:56:43,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8645 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=26334, Invalid=43626, Unknown=0, NotChecked=0, Total=69960 [2022-01-31 17:56:43,057 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 1267 mSolverCounterSat, 4149 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 5416 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4149 IncrementalHoareTripleChecker+Valid, 1267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 17:56:43,057 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 88 Invalid, 5416 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4149 Valid, 1267 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 17:56:43,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1080 states. [2022-01-31 17:56:43,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1080 to 1080. [2022-01-31 17:56:43,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1080 states, 1074 states have (on average 1.0083798882681565) internal successors, (1083), 1074 states have internal predecessors, (1083), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:56:43,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1080 states to 1080 states and 1088 transitions. [2022-01-31 17:56:43,080 INFO L78 Accepts]: Start accepts. Automaton has 1080 states and 1088 transitions. Word has length 1067 [2022-01-31 17:56:43,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:56:43,080 INFO L470 AbstractCegarLoop]: Abstraction has 1080 states and 1088 transitions. [2022-01-31 17:56:43,080 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.1940298507462686) internal successors, (160), 133 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:56:43,080 INFO L276 IsEmpty]: Start isEmpty. Operand 1080 states and 1088 transitions. [2022-01-31 17:56:43,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1076 [2022-01-31 17:56:43,084 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:56:43,085 INFO L514 BasicCegarLoop]: trace histogram [131, 131, 131, 131, 131, 131, 131, 131, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:56:43,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 17:56:43,085 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:56:43,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:56:43,085 INFO L85 PathProgramCache]: Analyzing trace with hash 585215911, now seen corresponding path program 131 times [2022-01-31 17:56:43,085 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:56:43,085 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2066564707] [2022-01-31 17:56:43,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:56:43,086 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:56:43,086 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:56:43,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:56:43,162 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:56:43,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:48,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:56:48,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:56:48,522 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 17:56:48,522 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:56:48,522 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2066564707] [2022-01-31 17:56:48,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2066564707] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:56:48,522 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:56:48,522 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-01-31 17:56:48,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525804816] [2022-01-31 17:56:48,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:56:48,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-01-31 17:56:48,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:56:48,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-01-31 17:56:48,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8913, Invalid=9177, Unknown=0, NotChecked=0, Total=18090 [2022-01-31 17:56:48,526 INFO L87 Difference]: Start difference. First operand 1080 states and 1088 transitions. Second operand has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 134 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:00,636 INFO L93 Difference]: Finished difference Result 2030 states and 2053 transitions. [2022-01-31 17:57:00,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-01-31 17:57:00,637 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 134 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1075 [2022-01-31 17:57:00,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:00,638 INFO L225 Difference]: With dead ends: 2030 [2022-01-31 17:57:00,638 INFO L226 Difference]: Without dead ends: 1088 [2022-01-31 17:57:00,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8777 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=26733, Invalid=44289, Unknown=0, NotChecked=0, Total=71022 [2022-01-31 17:57:00,640 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1199 mSolverCounterSat, 4997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 6196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4997 IncrementalHoareTripleChecker+Valid, 1199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:00,641 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 68 Invalid, 6196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4997 Valid, 1199 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 17:57:00,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2022-01-31 17:57:00,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 1088. [2022-01-31 17:57:00,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1088 states, 1082 states have (on average 1.0083179297597042) internal successors, (1091), 1082 states have internal predecessors, (1091), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:00,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1088 states to 1088 states and 1096 transitions. [2022-01-31 17:57:00,658 INFO L78 Accepts]: Start accepts. Automaton has 1088 states and 1096 transitions. Word has length 1075 [2022-01-31 17:57:00,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:00,658 INFO L470 AbstractCegarLoop]: Abstraction has 1088 states and 1096 transitions. [2022-01-31 17:57:00,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.1925925925925926) internal successors, (161), 134 states have internal predecessors, (161), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:00,658 INFO L276 IsEmpty]: Start isEmpty. Operand 1088 states and 1096 transitions. [2022-01-31 17:57:00,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1084 [2022-01-31 17:57:00,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:00,663 INFO L514 BasicCegarLoop]: trace histogram [132, 132, 132, 132, 132, 132, 132, 132, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:00,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 17:57:00,663 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:00,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:00,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1652689323, now seen corresponding path program 132 times [2022-01-31 17:57:00,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:00,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [56962973] [2022-01-31 17:57:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:00,664 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:00,664 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:00,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:00,740 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:01,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:06,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:06,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:06,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:06,902 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:06,902 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [56962973] [2022-01-31 17:57:06,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [56962973] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:06,902 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:06,902 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-01-31 17:57:06,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602424766] [2022-01-31 17:57:06,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:06,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-01-31 17:57:06,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:06,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-01-31 17:57:06,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9047, Invalid=9313, Unknown=0, NotChecked=0, Total=18360 [2022-01-31 17:57:06,906 INFO L87 Difference]: Start difference. First operand 1088 states and 1096 transitions. Second operand has 136 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 135 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:20,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:20,582 INFO L93 Difference]: Finished difference Result 2045 states and 2068 transitions. [2022-01-31 17:57:20,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-01-31 17:57:20,582 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 135 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1083 [2022-01-31 17:57:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:20,583 INFO L225 Difference]: With dead ends: 2045 [2022-01-31 17:57:20,584 INFO L226 Difference]: Without dead ends: 1096 [2022-01-31 17:57:20,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 267 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8910 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=27135, Invalid=44957, Unknown=0, NotChecked=0, Total=72092 [2022-01-31 17:57:20,587 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 5230 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6380 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5230 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:20,587 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6380 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5230 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:57:20,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2022-01-31 17:57:20,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 1096. [2022-01-31 17:57:20,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1096 states, 1090 states have (on average 1.008256880733945) internal successors, (1099), 1090 states have internal predecessors, (1099), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:20,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1096 states to 1096 states and 1104 transitions. [2022-01-31 17:57:20,604 INFO L78 Accepts]: Start accepts. Automaton has 1096 states and 1104 transitions. Word has length 1083 [2022-01-31 17:57:20,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:20,604 INFO L470 AbstractCegarLoop]: Abstraction has 1096 states and 1104 transitions. [2022-01-31 17:57:20,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.1911764705882353) internal successors, (162), 135 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:20,604 INFO L276 IsEmpty]: Start isEmpty. Operand 1096 states and 1104 transitions. [2022-01-31 17:57:20,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1092 [2022-01-31 17:57:20,608 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:20,609 INFO L514 BasicCegarLoop]: trace histogram [133, 133, 133, 133, 133, 133, 133, 133, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:20,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 17:57:20,609 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:20,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:20,609 INFO L85 PathProgramCache]: Analyzing trace with hash -885660121, now seen corresponding path program 133 times [2022-01-31 17:57:20,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:20,609 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [317311244] [2022-01-31 17:57:20,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:20,610 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:20,610 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:20,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:20,737 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:21,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:25,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:25,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:25,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:57:25,296 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:25,296 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [317311244] [2022-01-31 17:57:25,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [317311244] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:25,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:25,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [137] imperfect sequences [] total 137 [2022-01-31 17:57:25,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150346790] [2022-01-31 17:57:25,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:25,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2022-01-31 17:57:25,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:25,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2022-01-31 17:57:25,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9182, Invalid=9450, Unknown=0, NotChecked=0, Total=18632 [2022-01-31 17:57:25,301 INFO L87 Difference]: Start difference. First operand 1096 states and 1104 transitions. Second operand has 137 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 136 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:37,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:37,189 INFO L93 Difference]: Finished difference Result 2060 states and 2083 transitions. [2022-01-31 17:57:37,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-01-31 17:57:37,190 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 136 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1091 [2022-01-31 17:57:37,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:37,191 INFO L225 Difference]: With dead ends: 2060 [2022-01-31 17:57:37,191 INFO L226 Difference]: Without dead ends: 1104 [2022-01-31 17:57:37,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9044 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=27540, Invalid=45630, Unknown=0, NotChecked=0, Total=73170 [2022-01-31 17:57:37,194 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1120 mSolverCounterSat, 6449 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 7569 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6449 IncrementalHoareTripleChecker+Valid, 1120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:37,194 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 43 Invalid, 7569 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6449 Valid, 1120 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 17:57:37,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1104 states. [2022-01-31 17:57:37,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1104 to 1104. [2022-01-31 17:57:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1098 states have (on average 1.0081967213114753) internal successors, (1107), 1098 states have internal predecessors, (1107), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:37,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 1112 transitions. [2022-01-31 17:57:37,212 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 1112 transitions. Word has length 1091 [2022-01-31 17:57:37,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:37,212 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 1112 transitions. [2022-01-31 17:57:37,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 137 states have (on average 1.1897810218978102) internal successors, (163), 136 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:37,212 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 1112 transitions. [2022-01-31 17:57:37,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1100 [2022-01-31 17:57:37,217 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:37,217 INFO L514 BasicCegarLoop]: trace histogram [134, 134, 134, 134, 134, 134, 134, 134, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:37,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 17:57:37,217 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:37,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:37,217 INFO L85 PathProgramCache]: Analyzing trace with hash -1360122837, now seen corresponding path program 134 times [2022-01-31 17:57:37,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:37,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635867096] [2022-01-31 17:57:37,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:37,218 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:37,218 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:37,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:37,299 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:37,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:57:43,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:57:43,774 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 17:57:43,775 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:57:43,775 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635867096] [2022-01-31 17:57:43,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635867096] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:57:43,775 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:57:43,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-01-31 17:57:43,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656018202] [2022-01-31 17:57:43,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:57:43,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-01-31 17:57:43,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:57:43,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-01-31 17:57:43,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9318, Invalid=9588, Unknown=0, NotChecked=0, Total=18906 [2022-01-31 17:57:43,779 INFO L87 Difference]: Start difference. First operand 1104 states and 1112 transitions. Second operand has 138 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 137 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:57:58,098 INFO L93 Difference]: Finished difference Result 2075 states and 2098 transitions. [2022-01-31 17:57:58,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-01-31 17:57:58,098 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 137 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1099 [2022-01-31 17:57:58,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:57:58,099 INFO L225 Difference]: With dead ends: 2075 [2022-01-31 17:57:58,099 INFO L226 Difference]: Without dead ends: 1112 [2022-01-31 17:57:58,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9179 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=27948, Invalid=46308, Unknown=0, NotChecked=0, Total=74256 [2022-01-31 17:57:58,102 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1166 mSolverCounterSat, 5694 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6860 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5694 IncrementalHoareTripleChecker+Valid, 1166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 17:57:58,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6860 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5694 Valid, 1166 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 17:57:58,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2022-01-31 17:57:58,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 1112. [2022-01-31 17:57:58,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1112 states, 1106 states have (on average 1.0081374321880652) internal successors, (1115), 1106 states have internal predecessors, (1115), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:57:58,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1112 states to 1112 states and 1120 transitions. [2022-01-31 17:57:58,120 INFO L78 Accepts]: Start accepts. Automaton has 1112 states and 1120 transitions. Word has length 1099 [2022-01-31 17:57:58,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:57:58,120 INFO L470 AbstractCegarLoop]: Abstraction has 1112 states and 1120 transitions. [2022-01-31 17:57:58,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.1884057971014492) internal successors, (164), 137 states have internal predecessors, (164), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:57:58,120 INFO L276 IsEmpty]: Start isEmpty. Operand 1112 states and 1120 transitions. [2022-01-31 17:57:58,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1108 [2022-01-31 17:57:58,124 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:57:58,125 INFO L514 BasicCegarLoop]: trace histogram [135, 135, 135, 135, 135, 135, 135, 135, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:57:58,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 17:57:58,125 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:57:58,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:57:58,125 INFO L85 PathProgramCache]: Analyzing trace with hash -1688781657, now seen corresponding path program 135 times [2022-01-31 17:57:58,125 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:57:58,125 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8526773] [2022-01-31 17:57:58,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:57:58,126 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:57:58,126 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:57:58,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:57:58,202 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:57:58,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:04,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:04,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:04,766 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:04,767 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8526773] [2022-01-31 17:58:04,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [8526773] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:04,767 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:04,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [139] imperfect sequences [] total 139 [2022-01-31 17:58:04,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388334586] [2022-01-31 17:58:04,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:04,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 139 states [2022-01-31 17:58:04,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:04,770 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 139 interpolants. [2022-01-31 17:58:04,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9455, Invalid=9727, Unknown=0, NotChecked=0, Total=19182 [2022-01-31 17:58:04,773 INFO L87 Difference]: Start difference. First operand 1112 states and 1120 transitions. Second operand has 139 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 138 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 17:58:19,658 INFO L93 Difference]: Finished difference Result 2090 states and 2113 transitions. [2022-01-31 17:58:19,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-01-31 17:58:19,659 INFO L78 Accepts]: Start accepts. Automaton has has 139 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 138 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 1107 [2022-01-31 17:58:19,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 17:58:19,660 INFO L225 Difference]: With dead ends: 2090 [2022-01-31 17:58:19,660 INFO L226 Difference]: Without dead ends: 1120 [2022-01-31 17:58:19,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9315 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=28359, Invalid=46991, Unknown=0, NotChecked=0, Total=75350 [2022-01-31 17:58:19,663 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 33 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 5140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 6314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5140 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 17:58:19,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 53 Invalid, 6314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5140 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 17:58:19,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1120 states. [2022-01-31 17:58:19,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1120 to 1120. [2022-01-31 17:58:19,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1120 states, 1114 states have (on average 1.0080789946140036) internal successors, (1123), 1114 states have internal predecessors, (1123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 17:58:19,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1120 states to 1120 states and 1128 transitions. [2022-01-31 17:58:19,681 INFO L78 Accepts]: Start accepts. Automaton has 1120 states and 1128 transitions. Word has length 1107 [2022-01-31 17:58:19,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 17:58:19,681 INFO L470 AbstractCegarLoop]: Abstraction has 1120 states and 1128 transitions. [2022-01-31 17:58:19,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 139 states, 139 states have (on average 1.1870503597122302) internal successors, (165), 138 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 17:58:19,681 INFO L276 IsEmpty]: Start isEmpty. Operand 1120 states and 1128 transitions. [2022-01-31 17:58:19,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1116 [2022-01-31 17:58:19,686 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 17:58:19,686 INFO L514 BasicCegarLoop]: trace histogram [136, 136, 136, 136, 136, 136, 136, 136, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 17:58:19,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 17:58:19,686 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 17:58:19,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 17:58:19,686 INFO L85 PathProgramCache]: Analyzing trace with hash -452940117, now seen corresponding path program 136 times [2022-01-31 17:58:19,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 17:58:19,686 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631769681] [2022-01-31 17:58:19,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 17:58:19,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 17:58:19,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-01-31 17:58:19,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 17:58:19,767 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 17:58:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 17:58:24,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 17:58:24,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 17:58:24,680 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 17:58:24,680 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631769681] [2022-01-31 17:58:24,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [631769681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 17:58:24,680 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 17:58:24,680 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-01-31 17:58:24,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777748516] [2022-01-31 17:58:24,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 17:58:24,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-01-31 17:58:24,681 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 17:58:24,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-01-31 17:58:24,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9593, Invalid=9867, Unknown=0, NotChecked=0, Total=19460 [2022-01-31 17:58:24,685 INFO L87 Difference]: Start difference. First operand 1120 states and 1128 transitions. Second operand has 140 states, 140 states have (on average 1.1857142857142857) internal successors, (166), 139 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)