/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:27:11,961 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:27:11,978 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:27:12,016 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:27:12,061 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:27:12,061 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:27:12,062 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:27:12,063 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:27:12,076 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:27:12,076 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:27:12,078 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:27:12,078 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:27:12,079 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:27:12,079 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:27:12,079 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:27:12,079 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:27:12,080 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:27:12,080 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:27:12,080 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:27:12,081 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:27:12,269 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:27:12,285 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:27:12,287 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:27:12,288 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:27:12,303 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:27:12,305 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2022-02-15 01:27:12,352 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c85074fe/59c93b62bbf344e0a42125ae2e125024/FLAGd1d6e22b7 [2022-02-15 01:27:12,679 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:27:12,680 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i [2022-02-15 01:27:12,687 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c85074fe/59c93b62bbf344e0a42125ae2e125024/FLAGd1d6e22b7 [2022-02-15 01:27:12,699 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8c85074fe/59c93b62bbf344e0a42125ae2e125024 [2022-02-15 01:27:12,701 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:27:12,703 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:27:12,704 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:27:12,704 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:27:12,706 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:27:12,706 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:12,708 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@229d0f3e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12, skipping insertion in model container [2022-02-15 01:27:12,708 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:12,712 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:27:12,723 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:27:12,896 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i[920,933] [2022-02-15 01:27:12,918 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:27:12,940 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:27:12,949 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-crafted/simple_array_index_value_3.i[920,933] [2022-02-15 01:27:12,965 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:27:12,978 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:27:12,979 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12 WrapperNode [2022-02-15 01:27:12,979 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:27:12,980 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:27:12,980 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:27:12,980 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:27:12,989 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:12,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:12,998 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:12,998 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:13,015 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:13,018 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:13,027 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:13,029 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:27:13,033 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:27:13,033 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:27:13,033 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:27:13,034 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (1/1) ... [2022-02-15 01:27:13,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:27:13,057 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:27:13,067 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:27:13,080 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:27:13,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:27:13,122 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:27:13,122 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:27:13,122 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-15 01:27:13,122 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:27:13,123 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:27:13,123 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:27:13,124 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:27:13,178 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:27:13,182 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:27:13,310 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:27:13,324 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:27:13,324 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-15 01:27:13,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:27:13 BoogieIcfgContainer [2022-02-15 01:27:13,326 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:27:13,327 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:27:13,327 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:27:13,336 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:27:13,336 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:27:12" (1/3) ... [2022-02-15 01:27:13,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4251d45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:27:13, skipping insertion in model container [2022-02-15 01:27:13,337 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:27:12" (2/3) ... [2022-02-15 01:27:13,337 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4251d45f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:27:13, skipping insertion in model container [2022-02-15 01:27:13,338 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:27:13" (3/3) ... [2022-02-15 01:27:13,339 INFO L111 eAbstractionObserver]: Analyzing ICFG simple_array_index_value_3.i [2022-02-15 01:27:13,343 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:27:13,343 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:27:13,406 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:27:13,412 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 [2022-02-15 01:27:13,412 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:27:13,422 INFO L276 IsEmpty]: Start isEmpty. Operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:13,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:27:13,427 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:13,427 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:13,428 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:13,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:13,432 INFO L85 PathProgramCache]: Analyzing trace with hash -851892248, now seen corresponding path program 1 times [2022-02-15 01:27:13,438 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:13,438 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [95490828] [2022-02-15 01:27:13,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:13,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:13,509 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:13,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:13,729 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:13,730 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [95490828] [2022-02-15 01:27:13,731 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [95490828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:13,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:13,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:27:13,733 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1921711894] [2022-02-15 01:27:13,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:13,738 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:27:13,738 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:13,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:27:13,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:27:13,762 INFO L87 Difference]: Start difference. First operand has 24 states, 16 states have (on average 1.4375) internal successors, (23), 17 states have internal predecessors, (23), 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 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:13,901 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-02-15 01:27:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:27:13,903 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:27:13,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:13,908 INFO L225 Difference]: With dead ends: 47 [2022-02-15 01:27:13,908 INFO L226 Difference]: Without dead ends: 25 [2022-02-15 01:27:13,910 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:27:13,913 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 27 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 71 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:13,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 44 Invalid, 71 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:13,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-15 01:27:13,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2022-02-15 01:27:13,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 16 states have (on average 1.1875) internal successors, (19), 17 states have internal predecessors, (19), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:13,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2022-02-15 01:27:13,939 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 14 [2022-02-15 01:27:13,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:13,940 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2022-02-15 01:27:13,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:13,940 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2022-02-15 01:27:13,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:27:13,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:13,941 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:13,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:27:13,941 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:13,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:13,942 INFO L85 PathProgramCache]: Analyzing trace with hash -850045206, now seen corresponding path program 1 times [2022-02-15 01:27:13,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:13,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [388669085] [2022-02-15 01:27:13,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:13,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:13,944 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:13,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:13,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:13,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:13,985 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:13,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [388669085] [2022-02-15 01:27:13,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [388669085] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:13,985 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:13,985 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-15 01:27:13,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683714043] [2022-02-15 01:27:13,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:13,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-15 01:27:13,987 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:13,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-15 01:27:13,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-15 01:27:13,989 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:14,039 INFO L93 Difference]: Finished difference Result 48 states and 55 transitions. [2022-02-15 01:27:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-15 01:27:14,040 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:27:14,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:14,043 INFO L225 Difference]: With dead ends: 48 [2022-02-15 01:27:14,043 INFO L226 Difference]: Without dead ends: 31 [2022-02-15 01:27:14,043 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 [2022-02-15 01:27:14,044 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 22 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:14,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 23 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:27:14,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-15 01:27:14,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 25. [2022-02-15 01:27:14,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 18 states have internal predecessors, (20), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:14,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-02-15 01:27:14,053 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 14 [2022-02-15 01:27:14,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:14,053 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-02-15 01:27:14,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 3 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,053 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-02-15 01:27:14,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-02-15 01:27:14,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:14,054 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:14,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:27:14,054 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:14,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -446317518, now seen corresponding path program 1 times [2022-02-15 01:27:14,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:14,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907490220] [2022-02-15 01:27:14,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:14,066 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:14,066 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:14,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:14,068 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:14,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:14,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907490220] [2022-02-15 01:27:14,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907490220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:14,125 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:14,125 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:27:14,125 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571993989] [2022-02-15 01:27:14,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:14,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:27:14,125 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:14,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:27:14,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:27:14,126 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:14,208 INFO L93 Difference]: Finished difference Result 55 states and 65 transitions. [2022-02-15 01:27:14,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-15 01:27:14,209 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-02-15 01:27:14,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:14,210 INFO L225 Difference]: With dead ends: 55 [2022-02-15 01:27:14,210 INFO L226 Difference]: Without dead ends: 38 [2022-02-15 01:27:14,210 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 [2022-02-15 01:27:14,211 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 30 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 52 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:14,212 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 28 Invalid, 52 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:14,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-15 01:27:14,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2022-02-15 01:27:14,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 18 states have (on average 1.1666666666666667) internal successors, (21), 19 states have internal predecessors, (21), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:14,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-02-15 01:27:14,219 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 15 [2022-02-15 01:27:14,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:14,220 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-02-15 01:27:14,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 4 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,220 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-02-15 01:27:14,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2022-02-15 01:27:14,220 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:14,220 INFO L514 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:14,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:27:14,221 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:14,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:14,221 INFO L85 PathProgramCache]: Analyzing trace with hash -815661078, now seen corresponding path program 2 times [2022-02-15 01:27:14,221 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:14,221 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [833778438] [2022-02-15 01:27:14,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:14,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:14,223 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:14,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:14,224 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:14,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:14,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:14,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:14,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [833778438] [2022-02-15 01:27:14,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [833778438] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:14,296 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:14,296 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:27:14,296 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [822905332] [2022-02-15 01:27:14,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:14,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:27:14,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:14,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:27:14,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:27:14,297 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:14,409 INFO L93 Difference]: Finished difference Result 62 states and 75 transitions. [2022-02-15 01:27:14,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:27:14,409 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 16 [2022-02-15 01:27:14,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:14,410 INFO L225 Difference]: With dead ends: 62 [2022-02-15 01:27:14,410 INFO L226 Difference]: Without dead ends: 45 [2022-02-15 01:27:14,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:27:14,411 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 46 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:14,412 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 26 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:14,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-15 01:27:14,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 27. [2022-02-15 01:27:14,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 20 states have internal predecessors, (22), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:14,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-02-15 01:27:14,430 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 16 [2022-02-15 01:27:14,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:14,430 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-02-15 01:27:14,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 5 states have internal predecessors, (12), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,430 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-02-15 01:27:14,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:27:14,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:14,431 INFO L514 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:14,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:27:14,431 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:14,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:14,432 INFO L85 PathProgramCache]: Analyzing trace with hash 619590450, now seen corresponding path program 3 times [2022-02-15 01:27:14,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:14,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [676255125] [2022-02-15 01:27:14,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:14,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:14,433 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:14,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:14,434 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:14,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,500 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:14,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:14,504 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:14,505 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [676255125] [2022-02-15 01:27:14,505 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [676255125] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:14,505 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:14,505 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:27:14,505 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100491828] [2022-02-15 01:27:14,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:14,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:27:14,506 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:14,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:27:14,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:27:14,506 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:14,652 INFO L93 Difference]: Finished difference Result 69 states and 85 transitions. [2022-02-15 01:27:14,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-15 01:27:14,652 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 01:27:14,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:14,653 INFO L225 Difference]: With dead ends: 69 [2022-02-15 01:27:14,653 INFO L226 Difference]: Without dead ends: 52 [2022-02-15 01:27:14,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:27:14,654 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 50 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:14,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 39 Invalid, 136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:14,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-15 01:27:14,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 28. [2022-02-15 01:27:14,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 20 states have (on average 1.15) internal successors, (23), 21 states have internal predecessors, (23), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:14,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-15 01:27:14,661 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 17 [2022-02-15 01:27:14,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:14,661 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-15 01:27:14,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 6 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,662 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-15 01:27:14,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2022-02-15 01:27:14,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:14,662 INFO L514 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:14,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:27:14,662 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:14,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:14,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2132252438, now seen corresponding path program 4 times [2022-02-15 01:27:14,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:14,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [216073515] [2022-02-15 01:27:14,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:14,664 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:14,664 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:14,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:14,665 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:14,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:14,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:14,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:14,748 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:14,748 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [216073515] [2022-02-15 01:27:14,749 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [216073515] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:14,749 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:14,749 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:27:14,749 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584097594] [2022-02-15 01:27:14,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:14,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:27:14,749 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:14,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:27:14,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:27:14,750 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:14,936 INFO L93 Difference]: Finished difference Result 76 states and 95 transitions. [2022-02-15 01:27:14,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:27:14,936 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 18 [2022-02-15 01:27:14,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:14,937 INFO L225 Difference]: With dead ends: 76 [2022-02-15 01:27:14,937 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 01:27:14,937 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:27:14,938 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 58 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 169 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 169 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:14,938 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 47 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 169 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:14,939 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 01:27:14,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 29. [2022-02-15 01:27:14,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:14,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-02-15 01:27:14,945 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 18 [2022-02-15 01:27:14,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:14,945 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-02-15 01:27:14,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.75) internal successors, (14), 7 states have internal predecessors, (14), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:14,946 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-02-15 01:27:14,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:27:14,946 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:14,946 INFO L514 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:14,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:27:14,946 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:14,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1540036046, now seen corresponding path program 5 times [2022-02-15 01:27:14,947 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:14,947 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [187995775] [2022-02-15 01:27:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:14,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:14,948 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:14,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:14,950 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:14,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:15,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:15,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:15,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [187995775] [2022-02-15 01:27:15,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [187995775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:15,048 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:15,048 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:27:15,048 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990599719] [2022-02-15 01:27:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:15,048 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:27:15,048 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:15,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:27:15,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:27:15,049 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:15,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:15,275 INFO L93 Difference]: Finished difference Result 83 states and 105 transitions. [2022-02-15 01:27:15,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:27:15,276 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:27:15,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:15,276 INFO L225 Difference]: With dead ends: 83 [2022-02-15 01:27:15,277 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 01:27:15,277 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:27:15,277 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 66 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 294 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:15,278 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 55 Invalid, 294 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:27:15,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 01:27:15,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 30. [2022-02-15 01:27:15,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 23 states have internal predecessors, (25), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:15,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2022-02-15 01:27:15,291 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 19 [2022-02-15 01:27:15,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:15,291 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2022-02-15 01:27:15,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 8 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:15,292 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2022-02-15 01:27:15,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:27:15,292 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:15,292 INFO L514 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:15,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:27:15,292 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:15,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:15,293 INFO L85 PathProgramCache]: Analyzing trace with hash -361197078, now seen corresponding path program 6 times [2022-02-15 01:27:15,293 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:15,293 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628379812] [2022-02-15 01:27:15,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:15,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:15,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:15,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:15,295 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:15,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:15,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:15,405 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:15,405 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628379812] [2022-02-15 01:27:15,405 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628379812] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:15,405 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:15,405 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:27:15,405 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528604052] [2022-02-15 01:27:15,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:15,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:27:15,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:15,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:27:15,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:27:15,406 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:15,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:15,704 INFO L93 Difference]: Finished difference Result 90 states and 115 transitions. [2022-02-15 01:27:15,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:27:15,705 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:27:15,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:15,706 INFO L225 Difference]: With dead ends: 90 [2022-02-15 01:27:15,706 INFO L226 Difference]: Without dead ends: 73 [2022-02-15 01:27:15,706 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:27:15,707 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 70 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 358 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 408 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 358 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:15,707 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 68 Invalid, 408 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 358 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:27:15,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-15 01:27:15,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 31. [2022-02-15 01:27:15,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 24 states have internal predecessors, (26), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:15,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-02-15 01:27:15,715 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 20 [2022-02-15 01:27:15,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:15,715 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-02-15 01:27:15,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.6) internal successors, (16), 9 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:15,715 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-02-15 01:27:15,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-15 01:27:15,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:15,716 INFO L514 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:15,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:27:15,716 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:15,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:15,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1823072562, now seen corresponding path program 7 times [2022-02-15 01:27:15,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:15,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290255189] [2022-02-15 01:27:15,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:15,718 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:15,718 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:15,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:15,719 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:15,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:15,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:15,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:15,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:15,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290255189] [2022-02-15 01:27:15,857 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [290255189] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:15,857 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:15,857 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:27:15,857 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206567852] [2022-02-15 01:27:15,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:15,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:27:15,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:15,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:27:15,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:27:15,858 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:16,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:16,240 INFO L93 Difference]: Finished difference Result 97 states and 125 transitions. [2022-02-15 01:27:16,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:27:16,241 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-15 01:27:16,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:16,241 INFO L225 Difference]: With dead ends: 97 [2022-02-15 01:27:16,242 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:27:16,242 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:27:16,244 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 78 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 471 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:16,244 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 76 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 471 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:27:16,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:27:16,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 32. [2022-02-15 01:27:16,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 24 states have (on average 1.125) internal successors, (27), 25 states have internal predecessors, (27), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:16,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2022-02-15 01:27:16,266 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 21 [2022-02-15 01:27:16,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:16,266 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2022-02-15 01:27:16,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 10 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:16,267 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2022-02-15 01:27:16,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-15 01:27:16,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:16,269 INFO L514 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:16,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:27:16,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:16,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:16,269 INFO L85 PathProgramCache]: Analyzing trace with hash 815954666, now seen corresponding path program 8 times [2022-02-15 01:27:16,270 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:16,270 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686064730] [2022-02-15 01:27:16,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:16,271 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:16,271 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:16,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:16,272 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:16,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:16,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:16,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:16,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:16,399 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:16,399 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686064730] [2022-02-15 01:27:16,399 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [686064730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:16,399 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:16,399 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:27:16,399 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281126305] [2022-02-15 01:27:16,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:16,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:27:16,399 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:16,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:27:16,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:27:16,400 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:16,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:16,816 INFO L93 Difference]: Finished difference Result 104 states and 135 transitions. [2022-02-15 01:27:16,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:27:16,817 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-15 01:27:16,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:16,818 INFO L225 Difference]: With dead ends: 104 [2022-02-15 01:27:16,818 INFO L226 Difference]: Without dead ends: 87 [2022-02-15 01:27:16,818 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:27:16,819 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 90 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 585 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 651 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:16,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 79 Invalid, 651 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:27:16,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2022-02-15 01:27:16,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 33. [2022-02-15 01:27:16,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 25 states have (on average 1.12) internal successors, (28), 26 states have internal predecessors, (28), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:16,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 35 transitions. [2022-02-15 01:27:16,826 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 35 transitions. Word has length 22 [2022-02-15 01:27:16,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:16,826 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 35 transitions. [2022-02-15 01:27:16,826 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.5) internal successors, (18), 11 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:16,826 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 35 transitions. [2022-02-15 01:27:16,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:27:16,827 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:16,827 INFO L514 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:16,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:27:16,827 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:16,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:16,827 INFO L85 PathProgramCache]: Analyzing trace with hash -339929038, now seen corresponding path program 9 times [2022-02-15 01:27:16,828 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:16,828 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1262413539] [2022-02-15 01:27:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:16,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:16,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:16,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:16,830 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:16,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:16,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:16,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:16,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:16,968 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:16,968 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1262413539] [2022-02-15 01:27:16,968 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1262413539] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:16,969 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:16,969 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:27:16,969 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449719748] [2022-02-15 01:27:16,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:16,969 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:27:16,969 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:16,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:27:16,969 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:27:16,970 INFO L87 Difference]: Start difference. First operand 33 states and 35 transitions. Second operand has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:17,414 INFO L93 Difference]: Finished difference Result 111 states and 145 transitions. [2022-02-15 01:27:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:27:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:27:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:17,415 INFO L225 Difference]: With dead ends: 111 [2022-02-15 01:27:17,415 INFO L226 Difference]: Without dead ends: 94 [2022-02-15 01:27:17,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:27:17,416 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 114 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 665 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 746 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:17,417 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 67 Invalid, 746 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 665 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:27:17,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-15 01:27:17,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 34. [2022-02-15 01:27:17,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 27 states have internal predecessors, (29), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:17,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-02-15 01:27:17,426 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 23 [2022-02-15 01:27:17,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:17,426 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-02-15 01:27:17,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 12 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:17,426 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-02-15 01:27:17,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-15 01:27:17,426 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:17,426 INFO L514 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:17,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:27:17,427 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:17,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:17,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1812585494, now seen corresponding path program 10 times [2022-02-15 01:27:17,427 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:17,427 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056454878] [2022-02-15 01:27:17,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:17,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:17,429 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:17,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:17,430 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:17,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:17,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:17,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:17,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056454878] [2022-02-15 01:27:17,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056454878] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:17,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:17,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:27:17,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865981425] [2022-02-15 01:27:17,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:17,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:27:17,569 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:17,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:27:17,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:27:17,570 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:18,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:18,099 INFO L93 Difference]: Finished difference Result 118 states and 155 transitions. [2022-02-15 01:27:18,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:27:18,099 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 24 [2022-02-15 01:27:18,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:18,101 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:27:18,101 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 01:27:18,101 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:27:18,102 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 138 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 753 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 753 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:18,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 55 Invalid, 849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 753 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:27:18,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 01:27:18,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 35. [2022-02-15 01:27:18,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 28 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:18,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-02-15 01:27:18,117 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 24 [2022-02-15 01:27:18,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:18,117 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-02-15 01:27:18,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 13 states have internal predecessors, (20), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:18,117 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-02-15 01:27:18,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:27:18,119 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:18,119 INFO L514 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:18,120 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:27:18,120 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:18,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -220295374, now seen corresponding path program 11 times [2022-02-15 01:27:18,120 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:18,120 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525524798] [2022-02-15 01:27:18,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:18,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:18,122 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:18,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:18,123 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:18,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:18,327 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:18,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:18,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:18,331 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:18,331 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525524798] [2022-02-15 01:27:18,331 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [525524798] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:18,331 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:18,331 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:27:18,331 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310735216] [2022-02-15 01:27:18,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:18,331 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:27:18,331 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:18,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:27:18,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:27:18,333 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:18,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:18,865 INFO L93 Difference]: Finished difference Result 125 states and 165 transitions. [2022-02-15 01:27:18,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:27:18,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 01:27:18,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:18,867 INFO L225 Difference]: With dead ends: 125 [2022-02-15 01:27:18,868 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:27:18,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=108, Invalid=594, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:27:18,869 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 138 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 1056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:18,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 73 Invalid, 1056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:27:18,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:27:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 36. [2022-02-15 01:27:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 29 states have internal predecessors, (31), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:18,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2022-02-15 01:27:18,893 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 25 [2022-02-15 01:27:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:18,893 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2022-02-15 01:27:18,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.4) internal successors, (21), 14 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2022-02-15 01:27:18,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:27:18,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:18,894 INFO L514 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:18,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:27:18,894 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:18,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:18,895 INFO L85 PathProgramCache]: Analyzing trace with hash 1896058090, now seen corresponding path program 12 times [2022-02-15 01:27:18,895 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:18,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1561220294] [2022-02-15 01:27:18,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:18,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:18,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:18,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:18,899 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:18,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:19,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:19,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:19,074 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:19,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1561220294] [2022-02-15 01:27:19,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1561220294] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:19,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:19,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:27:19,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263166858] [2022-02-15 01:27:19,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:19,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:27:19,075 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:19,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:27:19,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:27:19,075 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:19,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:19,758 INFO L93 Difference]: Finished difference Result 132 states and 175 transitions. [2022-02-15 01:27:19,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:27:19,759 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:27:19,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:19,761 INFO L225 Difference]: With dead ends: 132 [2022-02-15 01:27:19,761 INFO L226 Difference]: Without dead ends: 115 [2022-02-15 01:27:19,762 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:27:19,762 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 134 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1200 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 1200 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:19,762 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 96 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 1200 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:27:19,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-15 01:27:19,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 37. [2022-02-15 01:27:19,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:19,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-02-15 01:27:19,774 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 26 [2022-02-15 01:27:19,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:19,775 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-02-15 01:27:19,775 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.375) internal successors, (22), 15 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:19,775 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-02-15 01:27:19,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-15 01:27:19,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:19,778 INFO L514 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:19,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:27:19,778 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:19,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:19,779 INFO L85 PathProgramCache]: Analyzing trace with hash -1216461262, now seen corresponding path program 13 times [2022-02-15 01:27:19,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:19,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1133073208] [2022-02-15 01:27:19,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:19,780 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:19,780 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:19,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:19,781 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:19,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:19,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:19,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:19,978 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:19,978 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1133073208] [2022-02-15 01:27:19,978 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1133073208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:19,978 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:19,978 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:27:19,978 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445668219] [2022-02-15 01:27:19,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:19,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:27:19,979 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:19,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:27:19,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:27:19,979 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:20,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:20,753 INFO L93 Difference]: Finished difference Result 139 states and 185 transitions. [2022-02-15 01:27:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:27:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-15 01:27:20,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:20,754 INFO L225 Difference]: With dead ends: 139 [2022-02-15 01:27:20,754 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:27:20,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:27:20,755 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 150 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 1365 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 1476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 1365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:20,755 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 94 Invalid, 1476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 1365 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:27:20,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:27:20,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 38. [2022-02-15 01:27:20,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 30 states have (on average 1.1) internal successors, (33), 31 states have internal predecessors, (33), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:20,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2022-02-15 01:27:20,764 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2022-02-15 01:27:20,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:20,764 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2022-02-15 01:27:20,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 16 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:20,764 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2022-02-15 01:27:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-15 01:27:20,778 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:20,778 INFO L514 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:20,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:27:20,778 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:20,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:20,779 INFO L85 PathProgramCache]: Analyzing trace with hash 1079686634, now seen corresponding path program 14 times [2022-02-15 01:27:20,779 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:20,779 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1066610608] [2022-02-15 01:27:20,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:20,780 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:20,780 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:20,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:20,781 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:20,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:21,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:21,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:21,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:21,052 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:21,052 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1066610608] [2022-02-15 01:27:21,052 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1066610608] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:21,052 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:21,052 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:27:21,052 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746670487] [2022-02-15 01:27:21,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:21,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:27:21,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:27:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:27:21,053 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:21,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:21,943 INFO L93 Difference]: Finished difference Result 146 states and 195 transitions. [2022-02-15 01:27:21,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:27:21,944 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-15 01:27:21,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:21,946 INFO L225 Difference]: With dead ends: 146 [2022-02-15 01:27:21,946 INFO L226 Difference]: Without dead ends: 129 [2022-02-15 01:27:21,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:27:21,946 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 154 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1721 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:21,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 107 Invalid, 1721 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:27:21,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2022-02-15 01:27:21,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 39. [2022-02-15 01:27:21,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 31 states have (on average 1.096774193548387) internal successors, (34), 32 states have internal predecessors, (34), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 41 transitions. [2022-02-15 01:27:21,957 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 41 transitions. Word has length 28 [2022-02-15 01:27:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:21,957 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 41 transitions. [2022-02-15 01:27:21,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 17 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 41 transitions. [2022-02-15 01:27:21,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:27:21,957 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:21,957 INFO L514 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:21,957 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:27:21,958 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:21,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:21,958 INFO L85 PathProgramCache]: Analyzing trace with hash -754172622, now seen corresponding path program 15 times [2022-02-15 01:27:21,958 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:21,958 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [595149416] [2022-02-15 01:27:21,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:21,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:21,960 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:21,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:21,960 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:21,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:22,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:22,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:22,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:22,195 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:22,195 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [595149416] [2022-02-15 01:27:22,195 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [595149416] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:22,195 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:22,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:27:22,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753566190] [2022-02-15 01:27:22,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:22,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:27:22,196 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:22,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:27:22,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:27:22,197 INFO L87 Difference]: Start difference. First operand 39 states and 41 transitions. Second operand has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:23,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:23,029 INFO L93 Difference]: Finished difference Result 153 states and 205 transitions. [2022-02-15 01:27:23,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:27:23,029 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:27:23,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:23,030 INFO L225 Difference]: With dead ends: 153 [2022-02-15 01:27:23,030 INFO L226 Difference]: Without dead ends: 136 [2022-02-15 01:27:23,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=1046, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:27:23,031 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 202 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 1621 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 1764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 1621 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:23,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [203 Valid, 65 Invalid, 1764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 1621 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:27:23,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2022-02-15 01:27:23,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 40. [2022-02-15 01:27:23,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 32 states have (on average 1.09375) internal successors, (35), 33 states have internal predecessors, (35), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:23,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-02-15 01:27:23,042 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 29 [2022-02-15 01:27:23,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:23,042 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-02-15 01:27:23,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 18 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:23,042 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-02-15 01:27:23,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-15 01:27:23,042 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:23,042 INFO L514 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:23,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:27:23,043 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:23,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:23,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1769234710, now seen corresponding path program 16 times [2022-02-15 01:27:23,043 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:23,043 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1560907165] [2022-02-15 01:27:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:23,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:23,046 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:23,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:23,047 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:23,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:23,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:23,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:23,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:23,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:23,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1560907165] [2022-02-15 01:27:23,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1560907165] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:23,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:23,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:27:23,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666446385] [2022-02-15 01:27:23,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:23,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:27:23,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:23,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:27:23,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:27:23,355 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:24,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:24,603 INFO L93 Difference]: Finished difference Result 160 states and 215 transitions. [2022-02-15 01:27:24,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:27:24,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-15 01:27:24,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:24,605 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:27:24,605 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 01:27:24,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=153, Invalid=1179, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:27:24,606 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 198 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1932 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 1932 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:24,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [199 Valid, 88 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 1932 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:27:24,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 01:27:24,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 41. [2022-02-15 01:27:24,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 34 states have internal predecessors, (36), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:24,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 43 transitions. [2022-02-15 01:27:24,637 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 43 transitions. Word has length 30 [2022-02-15 01:27:24,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:24,637 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 43 transitions. [2022-02-15 01:27:24,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.3) internal successors, (26), 19 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:24,638 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 43 transitions. [2022-02-15 01:27:24,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:27:24,638 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:24,638 INFO L514 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:24,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:27:24,638 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:24,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:24,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1123578930, now seen corresponding path program 17 times [2022-02-15 01:27:24,638 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:24,639 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1959342461] [2022-02-15 01:27:24,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:24,639 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:24,640 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:24,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:24,640 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:24,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:24,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:24,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:24,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:24,897 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:24,897 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1959342461] [2022-02-15 01:27:24,897 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1959342461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:24,897 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:24,897 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:27:24,897 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678436417] [2022-02-15 01:27:24,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:24,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:27:24,897 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:24,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:27:24,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:27:24,898 INFO L87 Difference]: Start difference. First operand 41 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:26,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:26,033 INFO L93 Difference]: Finished difference Result 167 states and 225 transitions. [2022-02-15 01:27:26,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:27:26,034 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 01:27:26,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:26,035 INFO L225 Difference]: With dead ends: 167 [2022-02-15 01:27:26,036 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 01:27:26,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=1320, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:27:26,036 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 170 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 2409 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 2409 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:26,037 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 141 Invalid, 2542 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 2409 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:27:26,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 01:27:26,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 42. [2022-02-15 01:27:26,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 34 states have (on average 1.088235294117647) internal successors, (37), 35 states have internal predecessors, (37), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:26,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2022-02-15 01:27:26,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 31 [2022-02-15 01:27:26,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:26,054 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2022-02-15 01:27:26,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 20 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:26,054 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2022-02-15 01:27:26,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:27:26,054 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:26,054 INFO L514 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:26,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:27:26,055 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:26,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:26,055 INFO L85 PathProgramCache]: Analyzing trace with hash 606488554, now seen corresponding path program 18 times [2022-02-15 01:27:26,055 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:26,055 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137288663] [2022-02-15 01:27:26,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:26,056 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:26,056 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:26,056 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:26,057 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:26,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:26,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:26,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:26,336 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:26,336 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137288663] [2022-02-15 01:27:26,336 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137288663] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:26,336 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:26,336 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:27:26,336 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454371230] [2022-02-15 01:27:26,336 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:26,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:27:26,337 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:27:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=403, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:27:26,337 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:27,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:27,566 INFO L93 Difference]: Finished difference Result 174 states and 235 transitions. [2022-02-15 01:27:27,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:27:27,566 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:27:27,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:27,567 INFO L225 Difference]: With dead ends: 174 [2022-02-15 01:27:27,567 INFO L226 Difference]: Without dead ends: 157 [2022-02-15 01:27:27,567 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=171, Invalid=1469, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:27:27,568 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 174 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 2720 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 175 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 2720 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:27,568 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [175 Valid, 154 Invalid, 2858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 2720 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:27:27,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2022-02-15 01:27:27,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 43. [2022-02-15 01:27:27,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 36 states have internal predecessors, (38), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:27,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-02-15 01:27:27,579 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2022-02-15 01:27:27,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:27,579 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-02-15 01:27:27,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 21 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:27,580 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-02-15 01:27:27,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-15 01:27:27,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:27,580 INFO L514 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:27,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:27:27,580 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:27,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:27,580 INFO L85 PathProgramCache]: Analyzing trace with hash 1756556082, now seen corresponding path program 19 times [2022-02-15 01:27:27,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:27,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017477419] [2022-02-15 01:27:27,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:27,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:27,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:27,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:27,582 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:27,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:27,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:27,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:27,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:27,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:27,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017477419] [2022-02-15 01:27:27,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017477419] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:27,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:27,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:27:27,850 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303336458] [2022-02-15 01:27:27,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:27,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:27:27,850 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:27,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:27:27,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=444, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:27:27,860 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:29,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:29,302 INFO L93 Difference]: Finished difference Result 181 states and 245 transitions. [2022-02-15 01:27:29,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:27:29,302 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-15 01:27:29,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:29,304 INFO L225 Difference]: With dead ends: 181 [2022-02-15 01:27:29,304 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:27:29,305 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=1626, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:27:29,305 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 210 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2841 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 211 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 3000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 2841 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:29,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [211 Valid, 127 Invalid, 3000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 2841 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:27:29,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:27:29,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 44. [2022-02-15 01:27:29,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.0833333333333333) internal successors, (39), 37 states have internal predecessors, (39), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:29,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2022-02-15 01:27:29,329 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 33 [2022-02-15 01:27:29,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:29,331 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2022-02-15 01:27:29,331 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 22 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:29,331 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2022-02-15 01:27:29,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-15 01:27:29,332 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:29,332 INFO L514 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:29,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:27:29,332 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:29,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:29,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1246056214, now seen corresponding path program 20 times [2022-02-15 01:27:29,332 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:29,332 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1918935404] [2022-02-15 01:27:29,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:29,333 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:29,342 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:29,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:29,344 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:29,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:29,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:29,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:29,690 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:29,690 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1918935404] [2022-02-15 01:27:29,690 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1918935404] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:29,690 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:29,690 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:27:29,691 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476996102] [2022-02-15 01:27:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:29,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:27:29,691 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:29,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:27:29,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:27:29,691 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:31,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:31,069 INFO L93 Difference]: Finished difference Result 188 states and 255 transitions. [2022-02-15 01:27:31,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:27:31,069 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-15 01:27:31,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:31,070 INFO L225 Difference]: With dead ends: 188 [2022-02-15 01:27:31,070 INFO L226 Difference]: Without dead ends: 171 [2022-02-15 01:27:31,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=189, Invalid=1791, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:27:31,073 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 206 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 3234 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 207 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 3394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 3234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:31,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [207 Valid, 150 Invalid, 3394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 3234 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:27:31,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-02-15 01:27:31,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 45. [2022-02-15 01:27:31,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 38 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:31,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2022-02-15 01:27:31,090 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2022-02-15 01:27:31,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:31,090 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2022-02-15 01:27:31,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.25) internal successors, (30), 23 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:31,090 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2022-02-15 01:27:31,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:27:31,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:31,090 INFO L514 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:31,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:27:31,090 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:31,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:31,090 INFO L85 PathProgramCache]: Analyzing trace with hash 162243122, now seen corresponding path program 21 times [2022-02-15 01:27:31,091 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:31,091 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [572099906] [2022-02-15 01:27:31,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:31,092 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:31,092 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:31,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:31,093 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:31,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:31,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:31,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:31,465 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:31,465 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [572099906] [2022-02-15 01:27:31,465 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [572099906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:31,465 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:31,465 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:27:31,465 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6525668] [2022-02-15 01:27:31,465 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:31,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:27:31,465 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:31,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:27:31,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=532, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:27:31,466 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:33,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:33,192 INFO L93 Difference]: Finished difference Result 195 states and 265 transitions. [2022-02-15 01:27:33,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:27:33,193 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:27:33,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:33,193 INFO L225 Difference]: With dead ends: 195 [2022-02-15 01:27:33,194 INFO L226 Difference]: Without dead ends: 178 [2022-02-15 01:27:33,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=198, Invalid=1964, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:27:33,194 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 262 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3229 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 3420 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 3229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:33,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 98 Invalid, 3420 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 3229 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:27:33,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2022-02-15 01:27:33,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 46. [2022-02-15 01:27:33,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 39 states have internal predecessors, (41), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:33,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2022-02-15 01:27:33,209 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 35 [2022-02-15 01:27:33,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:33,209 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2022-02-15 01:27:33,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.24) internal successors, (31), 24 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:33,209 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2022-02-15 01:27:33,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-15 01:27:33,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:33,210 INFO L514 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:33,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:27:33,210 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:33,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:33,210 INFO L85 PathProgramCache]: Analyzing trace with hash 869849578, now seen corresponding path program 22 times [2022-02-15 01:27:33,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:33,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532961711] [2022-02-15 01:27:33,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:33,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:33,211 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:33,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:33,212 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:33,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:33,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:33,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:33,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:33,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532961711] [2022-02-15 01:27:33,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532961711] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:33,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:33,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:27:33,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887489277] [2022-02-15 01:27:33,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:33,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:27:33,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:33,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:27:33,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=579, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:27:33,573 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:35,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:35,367 INFO L93 Difference]: Finished difference Result 202 states and 275 transitions. [2022-02-15 01:27:35,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:27:35,368 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-15 01:27:35,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:35,371 INFO L225 Difference]: With dead ends: 202 [2022-02-15 01:27:35,371 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 01:27:35,371 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=207, Invalid=2145, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:27:35,372 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 274 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3535 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 3735 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 3535 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:35,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [275 Valid, 101 Invalid, 3735 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 3535 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:27:35,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 01:27:35,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 47. [2022-02-15 01:27:35,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 40 states have internal predecessors, (42), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:35,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2022-02-15 01:27:35,395 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2022-02-15 01:27:35,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:35,395 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2022-02-15 01:27:35,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.2307692307692308) internal successors, (32), 25 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:35,395 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2022-02-15 01:27:35,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:27:35,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:35,396 INFO L514 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:35,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:27:35,396 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:35,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash 1330813234, now seen corresponding path program 23 times [2022-02-15 01:27:35,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:35,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188837920] [2022-02-15 01:27:35,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:35,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:35,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:35,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:35,401 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:35,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:35,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:35,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:35,816 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:35,816 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188837920] [2022-02-15 01:27:35,816 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [188837920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:35,816 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:35,816 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:27:35,816 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921128585] [2022-02-15 01:27:35,816 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:35,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:27:35,817 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:35,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:27:35,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=628, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:27:35,817 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:37,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:37,502 INFO L93 Difference]: Finished difference Result 209 states and 285 transitions. [2022-02-15 01:27:37,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:27:37,503 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 01:27:37,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:37,504 INFO L225 Difference]: With dead ends: 209 [2022-02-15 01:27:37,504 INFO L226 Difference]: Without dead ends: 192 [2022-02-15 01:27:37,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=216, Invalid=2334, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:27:37,505 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 254 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 4095 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 4288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 4095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:37,505 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 144 Invalid, 4288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 4095 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:27:37,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-15 01:27:37,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 48. [2022-02-15 01:27:37,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 40 states have (on average 1.075) internal successors, (43), 41 states have internal predecessors, (43), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:37,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2022-02-15 01:27:37,522 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 37 [2022-02-15 01:27:37,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:37,522 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2022-02-15 01:27:37,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 26 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:37,522 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2022-02-15 01:27:37,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:27:37,523 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:37,523 INFO L514 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:37,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:27:37,523 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:37,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:37,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1559182614, now seen corresponding path program 24 times [2022-02-15 01:27:37,523 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:37,523 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1468989671] [2022-02-15 01:27:37,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:37,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:37,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:37,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:37,525 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:37,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:37,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:37,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:37,904 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:37,904 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1468989671] [2022-02-15 01:27:37,904 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1468989671] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:37,904 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:37,904 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:27:37,904 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021381329] [2022-02-15 01:27:37,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:37,904 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:27:37,904 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:37,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:27:37,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=679, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:27:37,905 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 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) [2022-02-15 01:27:39,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:39,690 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2022-02-15 01:27:39,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:27:39,690 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:27:39,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:39,691 INFO L225 Difference]: With dead ends: 216 [2022-02-15 01:27:39,691 INFO L226 Difference]: Without dead ends: 199 [2022-02-15 01:27:39,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=225, Invalid=2531, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:27:39,692 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 214 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4840 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 215 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 5016 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 4840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:39,694 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [215 Valid, 212 Invalid, 5016 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 4840 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:27:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2022-02-15 01:27:39,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 49. [2022-02-15 01:27:39,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 42 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:39,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2022-02-15 01:27:39,713 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 38 [2022-02-15 01:27:39,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:39,713 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2022-02-15 01:27:39,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2142857142857142) internal successors, (34), 27 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) [2022-02-15 01:27:39,713 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2022-02-15 01:27:39,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-15 01:27:39,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:39,714 INFO L514 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:39,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:27:39,714 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:39,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:39,714 INFO L85 PathProgramCache]: Analyzing trace with hash -954740686, now seen corresponding path program 25 times [2022-02-15 01:27:39,714 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:39,714 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1315796136] [2022-02-15 01:27:39,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:39,716 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:39,716 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:39,716 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:39,717 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:40,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:40,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:40,180 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:40,180 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:40,180 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1315796136] [2022-02-15 01:27:40,180 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1315796136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:40,180 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:40,180 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:27:40,180 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306128506] [2022-02-15 01:27:40,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:40,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:27:40,182 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:40,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:27:40,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=732, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:27:40,182 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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) [2022-02-15 01:27:42,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:42,327 INFO L93 Difference]: Finished difference Result 223 states and 305 transitions. [2022-02-15 01:27:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:27:42,332 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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 39 [2022-02-15 01:27:42,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:42,334 INFO L225 Difference]: With dead ends: 223 [2022-02-15 01:27:42,334 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:27:42,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=2736, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:27:42,335 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 314 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 4505 mSolverCounterSat, 229 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 315 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 4734 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 229 IncrementalHoareTripleChecker+Valid, 4505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:42,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [315 Valid, 105 Invalid, 4734 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [229 Valid, 4505 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:27:42,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:27:42,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 50. [2022-02-15 01:27:42,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 42 states have (on average 1.0714285714285714) internal successors, (45), 43 states have internal predecessors, (45), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:42,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2022-02-15 01:27:42,357 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 39 [2022-02-15 01:27:42,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:42,357 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2022-02-15 01:27:42,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.206896551724138) internal successors, (35), 28 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) [2022-02-15 01:27:42,357 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2022-02-15 01:27:42,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-15 01:27:42,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:42,358 INFO L514 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:42,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:27:42,358 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:42,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:42,359 INFO L85 PathProgramCache]: Analyzing trace with hash 603089898, now seen corresponding path program 26 times [2022-02-15 01:27:42,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:42,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1446165006] [2022-02-15 01:27:42,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:42,360 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:42,360 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:42,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:42,362 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:42,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:42,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:42,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:42,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:42,853 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:42,854 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1446165006] [2022-02-15 01:27:42,854 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1446165006] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:42,854 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:42,854 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:27:42,854 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553074963] [2022-02-15 01:27:42,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:42,854 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:27:42,854 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:42,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:27:42,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=787, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:27:42,855 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:44,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:44,977 INFO L93 Difference]: Finished difference Result 230 states and 315 transitions. [2022-02-15 01:27:44,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:27:44,977 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 40 [2022-02-15 01:27:44,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:44,979 INFO L225 Difference]: With dead ends: 230 [2022-02-15 01:27:44,979 INFO L226 Difference]: Without dead ends: 213 [2022-02-15 01:27:44,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=243, Invalid=2949, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:27:44,980 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 322 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4899 mSolverCounterSat, 236 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 5135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 236 IncrementalHoareTripleChecker+Valid, 4899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:44,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 113 Invalid, 5135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [236 Valid, 4899 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:27:44,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-02-15 01:27:45,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 51. [2022-02-15 01:27:45,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 43 states have (on average 1.069767441860465) internal successors, (46), 44 states have internal predecessors, (46), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:45,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-02-15 01:27:45,035 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 40 [2022-02-15 01:27:45,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:45,035 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-02-15 01:27:45,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.2) internal successors, (36), 29 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:45,036 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-02-15 01:27:45,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:27:45,036 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:45,036 INFO L514 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:45,036 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:27:45,036 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:45,036 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:45,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1651197746, now seen corresponding path program 27 times [2022-02-15 01:27:45,037 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:45,037 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1075713478] [2022-02-15 01:27:45,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:45,039 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:45,039 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:45,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:45,040 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:45,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:45,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:45,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:45,406 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:45,406 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1075713478] [2022-02-15 01:27:45,406 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1075713478] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:45,406 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:45,406 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:27:45,406 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456954094] [2022-02-15 01:27:45,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:45,406 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:27:45,406 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:45,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:27:45,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=844, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:27:45,407 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:47,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:47,466 INFO L93 Difference]: Finished difference Result 237 states and 325 transitions. [2022-02-15 01:27:47,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:27:47,466 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:27:47,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:47,469 INFO L225 Difference]: With dead ends: 237 [2022-02-15 01:27:47,469 INFO L226 Difference]: Without dead ends: 220 [2022-02-15 01:27:47,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=252, Invalid=3170, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:27:47,474 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 346 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 5173 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 5424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 5173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:47,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 101 Invalid, 5424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 5173 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:27:47,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-15 01:27:47,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 52. [2022-02-15 01:27:47,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 44 states have (on average 1.0681818181818181) internal successors, (47), 45 states have internal predecessors, (47), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:47,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2022-02-15 01:27:47,496 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 41 [2022-02-15 01:27:47,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:47,496 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2022-02-15 01:27:47,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1935483870967742) internal successors, (37), 30 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:47,496 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2022-02-15 01:27:47,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2022-02-15 01:27:47,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:47,497 INFO L514 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:47,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:27:47,497 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:47,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:47,497 INFO L85 PathProgramCache]: Analyzing trace with hash -217197334, now seen corresponding path program 28 times [2022-02-15 01:27:47,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:47,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [31402526] [2022-02-15 01:27:47,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:47,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:47,498 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:47,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:47,499 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:47,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:47,978 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:47,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:47,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:47,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:47,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [31402526] [2022-02-15 01:27:47,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [31402526] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:47,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:47,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:27:47,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199214949] [2022-02-15 01:27:47,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:47,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:27:47,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:47,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:27:47,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=903, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:27:47,982 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:50,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:50,444 INFO L93 Difference]: Finished difference Result 244 states and 335 transitions. [2022-02-15 01:27:50,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:27:50,444 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2022-02-15 01:27:50,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:50,445 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:27:50,445 INFO L226 Difference]: Without dead ends: 227 [2022-02-15 01:27:50,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=261, Invalid=3399, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:27:50,447 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 338 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5735 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 5985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 5735 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:50,447 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [339 Valid, 129 Invalid, 5985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 5735 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:27:50,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-15 01:27:50,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 53. [2022-02-15 01:27:50,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 46 states have internal predecessors, (48), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:50,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-02-15 01:27:50,469 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 42 [2022-02-15 01:27:50,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:50,470 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-02-15 01:27:50,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.1875) internal successors, (38), 31 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:50,470 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-02-15 01:27:50,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:27:50,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:50,470 INFO L514 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:50,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:27:50,470 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:50,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:50,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1992097330, now seen corresponding path program 29 times [2022-02-15 01:27:50,471 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:50,471 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [759809619] [2022-02-15 01:27:50,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:50,471 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:50,472 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:50,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:50,473 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:50,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:50,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:50,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:50,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:50,998 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:50,998 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [759809619] [2022-02-15 01:27:50,999 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [759809619] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:50,999 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:50,999 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:27:50,999 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582754472] [2022-02-15 01:27:50,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:50,999 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:27:50,999 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:51,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:27:51,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=964, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:27:51,000 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:54,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:54,039 INFO L93 Difference]: Finished difference Result 251 states and 345 transitions. [2022-02-15 01:27:54,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:27:54,039 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-15 01:27:54,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:54,040 INFO L225 Difference]: With dead ends: 251 [2022-02-15 01:27:54,040 INFO L226 Difference]: Without dead ends: 234 [2022-02-15 01:27:54,041 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=270, Invalid=3636, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:27:54,042 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 254 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 7005 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 255 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 7216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 7005 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:54,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [255 Valid, 252 Invalid, 7216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 7005 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:27:54,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-15 01:27:54,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 54. [2022-02-15 01:27:54,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.065217391304348) internal successors, (49), 47 states have internal predecessors, (49), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:54,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2022-02-15 01:27:54,066 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 43 [2022-02-15 01:27:54,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:54,066 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2022-02-15 01:27:54,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.1818181818181819) internal successors, (39), 32 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:54,066 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2022-02-15 01:27:54,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:27:54,067 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:54,067 INFO L514 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:54,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:27:54,067 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:54,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:54,067 INFO L85 PathProgramCache]: Analyzing trace with hash 1760755178, now seen corresponding path program 30 times [2022-02-15 01:27:54,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:54,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [886467799] [2022-02-15 01:27:54,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:54,068 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:54,068 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:54,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:54,070 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:54,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:54,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:54,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:54,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [886467799] [2022-02-15 01:27:54,438 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [886467799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:54,438 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:54,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:27:54,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396532521] [2022-02-15 01:27:54,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:54,439 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:27:54,439 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:54,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:27:54,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=1027, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:27:54,439 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:57,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:27:57,208 INFO L93 Difference]: Finished difference Result 258 states and 355 transitions. [2022-02-15 01:27:57,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:27:57,208 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:27:57,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:27:57,209 INFO L225 Difference]: With dead ends: 258 [2022-02-15 01:27:57,210 INFO L226 Difference]: Without dead ends: 241 [2022-02-15 01:27:57,210 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=279, Invalid=3881, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:27:57,211 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 262 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 7486 mSolverCounterSat, 218 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 7704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 218 IncrementalHoareTripleChecker+Valid, 7486 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:27:57,211 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 260 Invalid, 7704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [218 Valid, 7486 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:27:57,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2022-02-15 01:27:57,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 55. [2022-02-15 01:27:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 48 states have internal predecessors, (50), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:27:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 57 transitions. [2022-02-15 01:27:57,237 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 57 transitions. Word has length 44 [2022-02-15 01:27:57,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:27:57,237 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 57 transitions. [2022-02-15 01:27:57,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1764705882352942) internal successors, (40), 33 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:27:57,237 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 57 transitions. [2022-02-15 01:27:57,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-15 01:27:57,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:27:57,238 INFO L514 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:27:57,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:27:57,238 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:27:57,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:27:57,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1115884238, now seen corresponding path program 31 times [2022-02-15 01:27:57,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:27:57,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750753069] [2022-02-15 01:27:57,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:27:57,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:27:57,239 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:27:57,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:27:57,240 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:27:57,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:57,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:27:57,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:27:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:27:57,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:27:57,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750753069] [2022-02-15 01:27:57,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [750753069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:27:57,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:27:57,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:27:57,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741722188] [2022-02-15 01:27:57,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:27:57,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:27:57,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:27:57,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:27:57,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1092, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:27:57,684 INFO L87 Difference]: Start difference. First operand 55 states and 57 transitions. Second operand has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:00,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:00,645 INFO L93 Difference]: Finished difference Result 265 states and 365 transitions. [2022-02-15 01:28:00,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:28:00,645 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-15 01:28:00,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:00,648 INFO L225 Difference]: With dead ends: 265 [2022-02-15 01:28:00,648 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:28:00,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 497 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=288, Invalid=4134, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:28:00,649 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 366 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 7071 mSolverCounterSat, 273 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 148 SdHoareTripleChecker+Invalid, 7344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 273 IncrementalHoareTripleChecker+Valid, 7071 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:00,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 148 Invalid, 7344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [273 Valid, 7071 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:28:00,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:28:00,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 56. [2022-02-15 01:28:00,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.0625) internal successors, (51), 49 states have internal predecessors, (51), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:00,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2022-02-15 01:28:00,686 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 45 [2022-02-15 01:28:00,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:00,686 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2022-02-15 01:28:00,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1714285714285715) internal successors, (41), 34 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:00,686 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2022-02-15 01:28:00,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-15 01:28:00,687 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:00,687 INFO L514 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:00,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:28:00,687 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:00,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:00,687 INFO L85 PathProgramCache]: Analyzing trace with hash -97392918, now seen corresponding path program 32 times [2022-02-15 01:28:00,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:00,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1532126829] [2022-02-15 01:28:00,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:00,688 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:00,688 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:00,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:00,690 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:00,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:01,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:01,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:01,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:01,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:01,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1532126829] [2022-02-15 01:28:01,297 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1532126829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:01,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:01,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:28:01,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433456483] [2022-02-15 01:28:01,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:01,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:28:01,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:01,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:28:01,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1159, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:28:01,298 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:05,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:05,518 INFO L93 Difference]: Finished difference Result 272 states and 375 transitions. [2022-02-15 01:28:05,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:28:05,519 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 46 [2022-02-15 01:28:05,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:05,520 INFO L225 Difference]: With dead ends: 272 [2022-02-15 01:28:05,520 INFO L226 Difference]: Without dead ends: 255 [2022-02-15 01:28:05,520 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=297, Invalid=4395, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:28:05,520 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 322 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 8067 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 8321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 8067 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:05,521 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 221 Invalid, 8321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 8067 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:28:05,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-15 01:28:05,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 57. [2022-02-15 01:28:05,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 50 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:05,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 59 transitions. [2022-02-15 01:28:05,553 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 59 transitions. Word has length 46 [2022-02-15 01:28:05,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:05,553 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 59 transitions. [2022-02-15 01:28:05,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1666666666666667) internal successors, (42), 35 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:05,553 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 59 transitions. [2022-02-15 01:28:05,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:28:05,553 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:05,553 INFO L514 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:05,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:28:05,553 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:05,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:05,554 INFO L85 PathProgramCache]: Analyzing trace with hash 1411066930, now seen corresponding path program 33 times [2022-02-15 01:28:05,554 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:05,554 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2081568061] [2022-02-15 01:28:05,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:05,554 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:05,555 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:05,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:05,556 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:05,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:06,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:06,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:06,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:06,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:06,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2081568061] [2022-02-15 01:28:06,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2081568061] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:06,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:06,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:28:06,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031567032] [2022-02-15 01:28:06,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:06,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:28:06,200 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:06,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:28:06,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1228, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:28:06,201 INFO L87 Difference]: Start difference. First operand 57 states and 59 transitions. Second operand has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:10,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:10,556 INFO L93 Difference]: Finished difference Result 279 states and 385 transitions. [2022-02-15 01:28:10,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:28:10,557 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:28:10,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:10,558 INFO L225 Difference]: With dead ends: 279 [2022-02-15 01:28:10,558 INFO L226 Difference]: Without dead ends: 262 [2022-02-15 01:28:10,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=306, Invalid=4664, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:28:10,559 INFO L933 BasicCegarLoop]: 112 mSDtfsCounter, 382 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 8065 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 383 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 8352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 8065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:10,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [383 Valid, 164 Invalid, 8352 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 8065 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:28:10,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-02-15 01:28:10,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 58. [2022-02-15 01:28:10,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 50 states have (on average 1.06) internal successors, (53), 51 states have internal predecessors, (53), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:10,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2022-02-15 01:28:10,590 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 47 [2022-02-15 01:28:10,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:10,590 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2022-02-15 01:28:10,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.162162162162162) internal successors, (43), 36 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:10,591 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2022-02-15 01:28:10,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-15 01:28:10,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:10,591 INFO L514 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:10,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:28:10,591 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:10,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:10,591 INFO L85 PathProgramCache]: Analyzing trace with hash 928681962, now seen corresponding path program 34 times [2022-02-15 01:28:10,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:10,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1286678079] [2022-02-15 01:28:10,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:10,593 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:10,593 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:10,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:10,594 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:10,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:11,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:11,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:11,273 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:11,274 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:11,274 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1286678079] [2022-02-15 01:28:11,274 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1286678079] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:11,274 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:11,274 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:28:11,274 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248303581] [2022-02-15 01:28:11,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:11,274 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:28:11,274 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:11,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:28:11,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=1299, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:28:11,275 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:15,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:15,814 INFO L93 Difference]: Finished difference Result 286 states and 395 transitions. [2022-02-15 01:28:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:28:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-15 01:28:15,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:15,816 INFO L225 Difference]: With dead ends: 286 [2022-02-15 01:28:15,816 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 01:28:15,816 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=315, Invalid=4941, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:28:15,816 INFO L933 BasicCegarLoop]: 115 mSDtfsCounter, 346 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 9037 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 347 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 9309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 9037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:15,817 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [347 Valid, 227 Invalid, 9309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 9037 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-15 01:28:15,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 01:28:15,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 59. [2022-02-15 01:28:15,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 52 states have internal predecessors, (54), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:15,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 61 transitions. [2022-02-15 01:28:15,848 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 61 transitions. Word has length 48 [2022-02-15 01:28:15,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:15,848 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 61 transitions. [2022-02-15 01:28:15,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.1578947368421053) internal successors, (44), 37 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:15,848 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 61 transitions. [2022-02-15 01:28:15,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:28:15,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:15,848 INFO L514 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:15,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:28:15,849 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:15,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:15,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1140350158, now seen corresponding path program 35 times [2022-02-15 01:28:15,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:15,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147704368] [2022-02-15 01:28:15,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:15,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:15,850 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:15,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:15,852 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:15,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:16,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:16,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:16,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:16,530 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:16,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147704368] [2022-02-15 01:28:16,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147704368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:16,531 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:16,531 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 01:28:16,531 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548888838] [2022-02-15 01:28:16,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:16,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 01:28:16,531 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:16,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 01:28:16,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1372, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:28:16,532 INFO L87 Difference]: Start difference. First operand 59 states and 61 transitions. Second operand has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:20,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:20,905 INFO L93 Difference]: Finished difference Result 293 states and 405 transitions. [2022-02-15 01:28:20,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:28:20,905 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-15 01:28:20,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:20,906 INFO L225 Difference]: With dead ends: 293 [2022-02-15 01:28:20,906 INFO L226 Difference]: Without dead ends: 276 [2022-02-15 01:28:20,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 631 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=324, Invalid=5226, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:28:20,909 INFO L933 BasicCegarLoop]: 118 mSDtfsCounter, 322 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 9921 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 323 SdHoareTripleChecker+Valid, 275 SdHoareTripleChecker+Invalid, 10184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 9921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:20,909 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [323 Valid, 275 Invalid, 10184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 9921 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:28:20,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 276 states. [2022-02-15 01:28:20,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 276 to 60. [2022-02-15 01:28:20,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 52 states have (on average 1.0576923076923077) internal successors, (55), 53 states have internal predecessors, (55), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:20,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2022-02-15 01:28:20,945 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 49 [2022-02-15 01:28:20,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:20,945 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2022-02-15 01:28:20,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1538461538461537) internal successors, (45), 38 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:20,945 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2022-02-15 01:28:20,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:28:20,945 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:20,945 INFO L514 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:20,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:28:20,946 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:20,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:20,946 INFO L85 PathProgramCache]: Analyzing trace with hash -855836438, now seen corresponding path program 36 times [2022-02-15 01:28:20,946 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:20,946 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [851005302] [2022-02-15 01:28:20,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:20,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:20,947 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:20,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:20,948 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:20,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:21,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:21,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:21,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:21,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:21,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [851005302] [2022-02-15 01:28:21,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [851005302] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:21,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:21,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:28:21,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117919697] [2022-02-15 01:28:21,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:21,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:28:21,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:21,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:28:21,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1447, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:28:21,662 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:26,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:26,320 INFO L93 Difference]: Finished difference Result 300 states and 415 transitions. [2022-02-15 01:28:26,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:28:26,320 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:28:26,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:26,322 INFO L225 Difference]: With dead ends: 300 [2022-02-15 01:28:26,322 INFO L226 Difference]: Without dead ends: 283 [2022-02-15 01:28:26,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 667 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=333, Invalid=5519, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:28:26,322 INFO L933 BasicCegarLoop]: 121 mSDtfsCounter, 398 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 9762 mSolverCounterSat, 304 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 399 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 10066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 304 IncrementalHoareTripleChecker+Valid, 9762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:26,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [399 Valid, 198 Invalid, 10066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [304 Valid, 9762 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:28:26,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-02-15 01:28:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 61. [2022-02-15 01:28:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 54 states have internal predecessors, (56), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:26,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-02-15 01:28:26,357 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 50 [2022-02-15 01:28:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:26,357 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-02-15 01:28:26,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.15) internal successors, (46), 39 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-02-15 01:28:26,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-15 01:28:26,357 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:26,357 INFO L514 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:26,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:28:26,358 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:26,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:26,358 INFO L85 PathProgramCache]: Analyzing trace with hash -625845710, now seen corresponding path program 37 times [2022-02-15 01:28:26,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:26,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708731083] [2022-02-15 01:28:26,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:26,359 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:26,359 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:26,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:26,360 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:27,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:27,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:27,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:27,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:27,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708731083] [2022-02-15 01:28:27,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708731083] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:27,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:27,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:28:27,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760988153] [2022-02-15 01:28:27,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:27,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:28:27,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:27,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:28:27,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=1524, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:28:27,060 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2022-02-15 01:28:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:31,479 INFO L93 Difference]: Finished difference Result 307 states and 425 transitions. [2022-02-15 01:28:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:28:31,479 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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 51 [2022-02-15 01:28:31,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:31,480 INFO L225 Difference]: With dead ends: 307 [2022-02-15 01:28:31,480 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:28:31,481 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=342, Invalid=5820, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:28:31,481 INFO L933 BasicCegarLoop]: 124 mSDtfsCounter, 454 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 9805 mSolverCounterSat, 335 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 455 SdHoareTripleChecker+Valid, 146 SdHoareTripleChecker+Invalid, 10140 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 335 IncrementalHoareTripleChecker+Valid, 9805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:31,481 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [455 Valid, 146 Invalid, 10140 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [335 Valid, 9805 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:28:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:28:31,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 62. [2022-02-15 01:28:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 55 states have internal predecessors, (57), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:31,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2022-02-15 01:28:31,518 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 51 [2022-02-15 01:28:31,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:31,519 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2022-02-15 01:28:31,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.146341463414634) internal successors, (47), 40 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) [2022-02-15 01:28:31,520 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2022-02-15 01:28:31,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-02-15 01:28:31,520 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:31,520 INFO L514 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:31,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:28:31,520 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:31,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -2086067734, now seen corresponding path program 38 times [2022-02-15 01:28:31,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:31,521 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1185616069] [2022-02-15 01:28:31,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:31,522 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:31,522 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:31,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:31,523 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:31,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:32,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:32,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:32,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:32,300 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:32,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1185616069] [2022-02-15 01:28:32,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1185616069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:32,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:32,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:28:32,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787625149] [2022-02-15 01:28:32,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:32,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:28:32,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:32,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:28:32,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1603, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:28:32,301 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 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) [2022-02-15 01:28:37,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:37,150 INFO L93 Difference]: Finished difference Result 314 states and 435 transitions. [2022-02-15 01:28:37,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:28:37,151 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 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 52 [2022-02-15 01:28:37,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:37,152 INFO L225 Difference]: With dead ends: 314 [2022-02-15 01:28:37,152 INFO L226 Difference]: Without dead ends: 297 [2022-02-15 01:28:37,153 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 742 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=351, Invalid=6129, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:28:37,153 INFO L933 BasicCegarLoop]: 127 mSDtfsCounter, 358 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 11550 mSolverCounterSat, 290 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 11840 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 290 IncrementalHoareTripleChecker+Valid, 11550 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:37,153 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 284 Invalid, 11840 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [290 Valid, 11550 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-15 01:28:37,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2022-02-15 01:28:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 63. [2022-02-15 01:28:37,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 56 states have internal predecessors, (58), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:37,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 65 transitions. [2022-02-15 01:28:37,191 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 65 transitions. Word has length 52 [2022-02-15 01:28:37,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:37,191 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 65 transitions. [2022-02-15 01:28:37,191 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.1428571428571428) internal successors, (48), 41 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) [2022-02-15 01:28:37,191 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 65 transitions. [2022-02-15 01:28:37,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:28:37,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:37,192 INFO L514 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:37,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:28:37,192 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:37,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:37,192 INFO L85 PathProgramCache]: Analyzing trace with hash -108310222, now seen corresponding path program 39 times [2022-02-15 01:28:37,192 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:37,192 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541673816] [2022-02-15 01:28:37,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:37,193 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:37,193 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:37,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:37,194 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:37,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:38,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:38,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:38,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:38,006 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:38,006 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541673816] [2022-02-15 01:28:38,006 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541673816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:38,006 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:38,006 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 01:28:38,006 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662237843] [2022-02-15 01:28:38,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:38,007 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 01:28:38,007 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:38,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 01:28:38,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=1684, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:28:38,007 INFO L87 Difference]: Start difference. First operand 63 states and 65 transitions. Second operand has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:43,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:43,587 INFO L93 Difference]: Finished difference Result 321 states and 445 transitions. [2022-02-15 01:28:43,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:28:43,588 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:28:43,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:43,605 INFO L225 Difference]: With dead ends: 321 [2022-02-15 01:28:43,605 INFO L226 Difference]: Without dead ends: 304 [2022-02-15 01:28:43,606 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 781 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=360, Invalid=6446, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:28:43,606 INFO L933 BasicCegarLoop]: 130 mSDtfsCounter, 350 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 12351 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 312 SdHoareTripleChecker+Invalid, 12640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 12351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:43,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 312 Invalid, 12640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 12351 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 01:28:43,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-02-15 01:28:43,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 64. [2022-02-15 01:28:43,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 56 states have (on average 1.0535714285714286) internal successors, (59), 57 states have internal predecessors, (59), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:43,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2022-02-15 01:28:43,648 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 53 [2022-02-15 01:28:43,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:43,648 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2022-02-15 01:28:43,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:43,648 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2022-02-15 01:28:43,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-15 01:28:43,648 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:43,648 INFO L514 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:43,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:28:43,649 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:43,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:43,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1072630506, now seen corresponding path program 40 times [2022-02-15 01:28:43,649 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:43,649 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1048238688] [2022-02-15 01:28:43,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:43,650 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:43,650 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:43,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:43,655 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:44,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:44,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:44,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:44,345 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:44,345 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1048238688] [2022-02-15 01:28:44,345 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1048238688] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:44,345 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:44,346 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:28:44,346 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604970243] [2022-02-15 01:28:44,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:44,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:28:44,346 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:44,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:28:44,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=1767, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:28:44,347 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:50,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:50,109 INFO L93 Difference]: Finished difference Result 328 states and 455 transitions. [2022-02-15 01:28:50,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:28:50,109 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-15 01:28:50,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:50,110 INFO L225 Difference]: With dead ends: 328 [2022-02-15 01:28:50,111 INFO L226 Difference]: Without dead ends: 311 [2022-02-15 01:28:50,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 821 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=369, Invalid=6771, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:28:50,111 INFO L933 BasicCegarLoop]: 133 mSDtfsCounter, 498 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 11343 mSolverCounterSat, 366 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 145 SdHoareTripleChecker+Invalid, 11709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 366 IncrementalHoareTripleChecker+Valid, 11343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:50,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 145 Invalid, 11709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [366 Valid, 11343 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-15 01:28:50,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2022-02-15 01:28:50,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 65. [2022-02-15 01:28:50,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 58 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:50,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 67 transitions. [2022-02-15 01:28:50,159 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 67 transitions. Word has length 54 [2022-02-15 01:28:50,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:50,160 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 67 transitions. [2022-02-15 01:28:50,160 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.1363636363636365) internal successors, (50), 43 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:50,160 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 67 transitions. [2022-02-15 01:28:50,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:28:50,160 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:50,160 INFO L514 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:50,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:28:50,160 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:50,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:50,160 INFO L85 PathProgramCache]: Analyzing trace with hash -972912590, now seen corresponding path program 41 times [2022-02-15 01:28:50,161 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:50,161 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1935024399] [2022-02-15 01:28:50,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:50,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:50,162 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:50,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:50,163 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:50,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:51,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:51,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:51,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:51,046 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:51,046 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1935024399] [2022-02-15 01:28:51,046 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1935024399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:51,046 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:51,046 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 01:28:51,046 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [921045813] [2022-02-15 01:28:51,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:51,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 01:28:51,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:51,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 01:28:51,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1852, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:28:51,048 INFO L87 Difference]: Start difference. First operand 65 states and 67 transitions. Second operand has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:56,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:28:56,552 INFO L93 Difference]: Finished difference Result 335 states and 465 transitions. [2022-02-15 01:28:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:28:56,552 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 01:28:56,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:28:56,553 INFO L225 Difference]: With dead ends: 335 [2022-02-15 01:28:56,554 INFO L226 Difference]: Without dead ends: 318 [2022-02-15 01:28:56,554 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 862 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=7104, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:28:56,561 INFO L933 BasicCegarLoop]: 136 mSDtfsCounter, 446 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 12681 mSolverCounterSat, 343 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 447 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 13024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 343 IncrementalHoareTripleChecker+Valid, 12681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:28:56,561 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [447 Valid, 228 Invalid, 13024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [343 Valid, 12681 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 01:28:56,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-15 01:28:56,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 66. [2022-02-15 01:28:56,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 58 states have (on average 1.0517241379310345) internal successors, (61), 59 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:28:56,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2022-02-15 01:28:56,672 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 55 [2022-02-15 01:28:56,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:28:56,673 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2022-02-15 01:28:56,673 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1333333333333333) internal successors, (51), 44 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:28:56,674 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2022-02-15 01:28:56,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:28:56,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:28:56,674 INFO L514 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:28:56,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:28:56,674 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:28:56,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:28:56,674 INFO L85 PathProgramCache]: Analyzing trace with hash 39760874, now seen corresponding path program 42 times [2022-02-15 01:28:56,674 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:28:56,674 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027351123] [2022-02-15 01:28:56,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:28:56,678 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:28:56,678 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:28:56,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:28:56,680 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:28:56,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:57,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:28:57,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:28:57,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:28:57,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:28:57,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027351123] [2022-02-15 01:28:57,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027351123] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:28:57,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:28:57,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:28:57,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326442748] [2022-02-15 01:28:57,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:28:57,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:28:57,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:28:57,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:28:57,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=1939, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:28:57,608 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:04,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:04,510 INFO L93 Difference]: Finished difference Result 342 states and 475 transitions. [2022-02-15 01:29:04,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:29:04,511 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:29:04,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:04,512 INFO L225 Difference]: With dead ends: 342 [2022-02-15 01:29:04,512 INFO L226 Difference]: Without dead ends: 325 [2022-02-15 01:29:04,513 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=387, Invalid=7445, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:29:04,513 INFO L933 BasicCegarLoop]: 139 mSDtfsCounter, 366 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 14408 mSolverCounterSat, 306 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 14714 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 306 IncrementalHoareTripleChecker+Valid, 14408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:04,513 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 346 Invalid, 14714 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [306 Valid, 14408 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-15 01:29:04,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-15 01:29:04,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 67. [2022-02-15 01:29:04,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 60 states have internal predecessors, (62), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:04,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 69 transitions. [2022-02-15 01:29:04,560 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 69 transitions. Word has length 56 [2022-02-15 01:29:04,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:04,560 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 69 transitions. [2022-02-15 01:29:04,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.1304347826086956) internal successors, (52), 45 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:04,560 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 69 transitions. [2022-02-15 01:29:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-15 01:29:04,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:04,561 INFO L514 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:04,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:29:04,561 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:04,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:04,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1367867186, now seen corresponding path program 43 times [2022-02-15 01:29:04,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:04,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1191528453] [2022-02-15 01:29:04,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:04,562 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:04,562 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:04,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:04,564 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:05,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:05,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:05,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:05,552 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:05,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1191528453] [2022-02-15 01:29:05,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1191528453] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:05,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:05,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-15 01:29:05,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621369115] [2022-02-15 01:29:05,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:05,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-15 01:29:05,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:05,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-15 01:29:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=2028, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:29:05,554 INFO L87 Difference]: Start difference. First operand 67 states and 69 transitions. Second operand has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:12,414 INFO L93 Difference]: Finished difference Result 349 states and 485 transitions. [2022-02-15 01:29:12,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:29:12,414 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-15 01:29:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:12,416 INFO L225 Difference]: With dead ends: 349 [2022-02-15 01:29:12,416 INFO L226 Difference]: Without dead ends: 332 [2022-02-15 01:29:12,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 947 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=396, Invalid=7794, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:29:12,418 INFO L933 BasicCegarLoop]: 142 mSDtfsCounter, 430 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 14395 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 431 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 14736 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 14395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:12,418 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [431 Valid, 284 Invalid, 14736 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 14395 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-15 01:29:12,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 332 states. [2022-02-15 01:29:12,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 332 to 68. [2022-02-15 01:29:12,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.05) internal successors, (63), 61 states have internal predecessors, (63), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:12,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 70 transitions. [2022-02-15 01:29:12,468 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 70 transitions. Word has length 57 [2022-02-15 01:29:12,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:12,468 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 70 transitions. [2022-02-15 01:29:12,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.127659574468085) internal successors, (53), 46 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:12,468 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 70 transitions. [2022-02-15 01:29:12,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2022-02-15 01:29:12,469 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:12,469 INFO L514 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:12,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:29:12,469 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:12,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:12,469 INFO L85 PathProgramCache]: Analyzing trace with hash -410510102, now seen corresponding path program 44 times [2022-02-15 01:29:12,469 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:12,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1845460397] [2022-02-15 01:29:12,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:12,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:12,470 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:12,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:12,472 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:12,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:13,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:13,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:13,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:13,450 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:13,450 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1845460397] [2022-02-15 01:29:13,450 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1845460397] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:13,450 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:13,450 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:29:13,450 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [369454191] [2022-02-15 01:29:13,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:13,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:29:13,450 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:13,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:29:13,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2119, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:29:13,451 INFO L87 Difference]: Start difference. First operand 68 states and 70 transitions. Second operand has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:20,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:20,669 INFO L93 Difference]: Finished difference Result 356 states and 495 transitions. [2022-02-15 01:29:20,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:29:20,669 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 58 [2022-02-15 01:29:20,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:20,671 INFO L225 Difference]: With dead ends: 356 [2022-02-15 01:29:20,671 INFO L226 Difference]: Without dead ends: 339 [2022-02-15 01:29:20,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=405, Invalid=8151, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:29:20,672 INFO L933 BasicCegarLoop]: 145 mSDtfsCounter, 538 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 13809 mSolverCounterSat, 398 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 14207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 398 IncrementalHoareTripleChecker+Valid, 13809 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:20,672 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 167 Invalid, 14207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [398 Valid, 13809 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-15 01:29:20,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 339 states. [2022-02-15 01:29:20,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 339 to 69. [2022-02-15 01:29:20,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 62 states have internal predecessors, (64), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:20,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-02-15 01:29:20,726 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 58 [2022-02-15 01:29:20,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:20,727 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-02-15 01:29:20,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.125) internal successors, (54), 47 states have internal predecessors, (54), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:20,727 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-02-15 01:29:20,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:29:20,727 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:20,727 INFO L514 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:20,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:29:20,727 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:20,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:20,728 INFO L85 PathProgramCache]: Analyzing trace with hash 294368818, now seen corresponding path program 45 times [2022-02-15 01:29:20,728 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:20,728 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514123283] [2022-02-15 01:29:20,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:20,729 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:20,729 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:20,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:20,730 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:20,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:21,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:21,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:21,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:21,627 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:21,627 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514123283] [2022-02-15 01:29:21,627 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [514123283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:21,627 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:21,627 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-02-15 01:29:21,627 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239179455] [2022-02-15 01:29:21,627 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:21,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-02-15 01:29:21,628 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:21,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-02-15 01:29:21,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2212, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:29:21,628 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:27,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:27,803 INFO L93 Difference]: Finished difference Result 363 states and 505 transitions. [2022-02-15 01:29:27,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 01:29:27,804 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:29:27,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:27,805 INFO L225 Difference]: With dead ends: 363 [2022-02-15 01:29:27,805 INFO L226 Difference]: Without dead ends: 346 [2022-02-15 01:29:27,806 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1036 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=414, Invalid=8516, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:29:27,808 INFO L933 BasicCegarLoop]: 148 mSDtfsCounter, 526 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 14749 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 200 SdHoareTripleChecker+Invalid, 15144 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 14749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:27,808 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 200 Invalid, 15144 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 14749 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 01:29:27,808 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-15 01:29:27,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 70. [2022-02-15 01:29:27,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 62 states have (on average 1.0483870967741935) internal successors, (65), 63 states have internal predecessors, (65), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:27,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2022-02-15 01:29:27,862 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 59 [2022-02-15 01:29:27,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:27,862 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2022-02-15 01:29:27,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1224489795918366) internal successors, (55), 48 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:27,863 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2022-02-15 01:29:27,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-15 01:29:27,863 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:27,863 INFO L514 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:27,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:29:27,863 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:27,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:27,863 INFO L85 PathProgramCache]: Analyzing trace with hash 670778858, now seen corresponding path program 46 times [2022-02-15 01:29:27,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:27,864 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1010040324] [2022-02-15 01:29:27,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:27,868 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:27,869 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:27,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:27,870 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:27,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:28,915 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:28,915 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1010040324] [2022-02-15 01:29:28,915 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1010040324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:28,915 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:28,915 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:29:28,915 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697023804] [2022-02-15 01:29:28,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:28,915 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:29:28,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:28,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:29:28,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2307, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:29:28,916 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:36,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:36,139 INFO L93 Difference]: Finished difference Result 370 states and 515 transitions. [2022-02-15 01:29:36,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-15 01:29:36,139 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-15 01:29:36,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:36,140 INFO L225 Difference]: With dead ends: 370 [2022-02-15 01:29:36,140 INFO L226 Difference]: Without dead ends: 353 [2022-02-15 01:29:36,141 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=423, Invalid=8889, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:29:36,141 INFO L933 BasicCegarLoop]: 151 mSDtfsCounter, 422 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 16934 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 348 SdHoareTripleChecker+Invalid, 17280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 16934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:36,141 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 348 Invalid, 17280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 16934 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2022-02-15 01:29:36,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-02-15 01:29:36,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 71. [2022-02-15 01:29:36,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 64 states have internal predecessors, (66), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:36,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 73 transitions. [2022-02-15 01:29:36,207 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 73 transitions. Word has length 60 [2022-02-15 01:29:36,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:36,207 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 73 transitions. [2022-02-15 01:29:36,207 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.12) internal successors, (56), 49 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:36,207 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 73 transitions. [2022-02-15 01:29:36,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:29:36,207 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:36,207 INFO L514 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:36,207 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:29:36,207 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:36,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:36,208 INFO L85 PathProgramCache]: Analyzing trace with hash -545411790, now seen corresponding path program 47 times [2022-02-15 01:29:36,208 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:36,208 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1628734483] [2022-02-15 01:29:36,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:36,209 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:36,209 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:36,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:36,211 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:36,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:37,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:37,260 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:37,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:37,260 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1628734483] [2022-02-15 01:29:37,260 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1628734483] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:37,260 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:37,260 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-15 01:29:37,260 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477742804] [2022-02-15 01:29:37,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:37,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-15 01:29:37,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:37,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-15 01:29:37,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2404, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:29:37,261 INFO L87 Difference]: Start difference. First operand 71 states and 73 transitions. Second operand has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:45,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:45,419 INFO L93 Difference]: Finished difference Result 377 states and 525 transitions. [2022-02-15 01:29:45,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:29:45,420 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:29:45,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:45,421 INFO L225 Difference]: With dead ends: 377 [2022-02-15 01:29:45,421 INFO L226 Difference]: Without dead ends: 360 [2022-02-15 01:29:45,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1129 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=432, Invalid=9270, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:29:45,436 INFO L933 BasicCegarLoop]: 154 mSDtfsCounter, 542 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 16167 mSolverCounterSat, 409 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 543 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 16576 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 409 IncrementalHoareTripleChecker+Valid, 16167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:45,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [543 Valid, 216 Invalid, 16576 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [409 Valid, 16167 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-15 01:29:45,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 360 states. [2022-02-15 01:29:45,496 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 360 to 72. [2022-02-15 01:29:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 64 states have (on average 1.046875) internal successors, (67), 65 states have internal predecessors, (67), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:45,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2022-02-15 01:29:45,497 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 61 [2022-02-15 01:29:45,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:45,497 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2022-02-15 01:29:45,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.1176470588235294) internal successors, (57), 50 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:45,497 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2022-02-15 01:29:45,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:29:45,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:45,497 INFO L514 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:45,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:29:45,497 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:45,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:45,498 INFO L85 PathProgramCache]: Analyzing trace with hash 407383786, now seen corresponding path program 48 times [2022-02-15 01:29:45,498 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:45,498 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [717965382] [2022-02-15 01:29:45,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:45,499 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:45,499 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:45,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:45,501 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:45,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:46,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:46,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:46,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:46,652 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:46,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [717965382] [2022-02-15 01:29:46,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [717965382] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:46,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:46,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:29:46,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122622675] [2022-02-15 01:29:46,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:46,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:29:46,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:46,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:29:46,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=2503, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:29:46,653 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:55,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:29:55,620 INFO L93 Difference]: Finished difference Result 384 states and 535 transitions. [2022-02-15 01:29:55,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-15 01:29:55,620 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:29:55,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:29:55,621 INFO L225 Difference]: With dead ends: 384 [2022-02-15 01:29:55,621 INFO L226 Difference]: Without dead ends: 367 [2022-02-15 01:29:55,622 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1177 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=441, Invalid=9659, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 01:29:55,622 INFO L933 BasicCegarLoop]: 157 mSDtfsCounter, 526 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 17230 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 527 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 17634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 17230 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:29:55,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [527 Valid, 254 Invalid, 17634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 17230 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-15 01:29:55,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2022-02-15 01:29:55,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 73. [2022-02-15 01:29:55,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 66 states have internal predecessors, (68), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:29:55,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 75 transitions. [2022-02-15 01:29:55,684 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 75 transitions. Word has length 62 [2022-02-15 01:29:55,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:29:55,684 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 75 transitions. [2022-02-15 01:29:55,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1153846153846154) internal successors, (58), 51 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:29:55,684 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 75 transitions. [2022-02-15 01:29:55,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-15 01:29:55,684 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:29:55,684 INFO L514 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:29:55,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:29:55,684 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:29:55,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:29:55,685 INFO L85 PathProgramCache]: Analyzing trace with hash -120724430, now seen corresponding path program 49 times [2022-02-15 01:29:55,685 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:29:55,685 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [252339390] [2022-02-15 01:29:55,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:29:55,686 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:29:55,686 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:29:55,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:29:55,688 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:29:55,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:56,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:29:56,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:29:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:29:56,882 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:29:56,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [252339390] [2022-02-15 01:29:56,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [252339390] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:29:56,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:29:56,882 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-02-15 01:29:56,882 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860366817] [2022-02-15 01:29:56,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:29:56,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-02-15 01:29:56,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:29:56,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-02-15 01:29:56,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=152, Invalid=2604, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:29:56,883 INFO L87 Difference]: Start difference. First operand 73 states and 75 transitions. Second operand has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:06,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:06,004 INFO L93 Difference]: Finished difference Result 391 states and 545 transitions. [2022-02-15 01:30:06,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:30:06,005 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-15 01:30:06,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:06,006 INFO L225 Difference]: With dead ends: 391 [2022-02-15 01:30:06,006 INFO L226 Difference]: Without dead ends: 374 [2022-02-15 01:30:06,007 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1226 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=450, Invalid=10056, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:30:06,007 INFO L933 BasicCegarLoop]: 160 mSDtfsCounter, 478 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 18769 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 479 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 19152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 18769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:06,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [479 Valid, 332 Invalid, 19152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 18769 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 01:30:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 374 states. [2022-02-15 01:30:06,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 374 to 74. [2022-02-15 01:30:06,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 66 states have (on average 1.0454545454545454) internal successors, (69), 67 states have internal predecessors, (69), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:30:06,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 76 transitions. [2022-02-15 01:30:06,075 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 76 transitions. Word has length 63 [2022-02-15 01:30:06,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:06,075 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 76 transitions. [2022-02-15 01:30:06,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.1132075471698113) internal successors, (59), 52 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:06,076 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 76 transitions. [2022-02-15 01:30:06,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-15 01:30:06,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:06,076 INFO L514 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:06,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:30:06,076 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:06,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:06,077 INFO L85 PathProgramCache]: Analyzing trace with hash 687790058, now seen corresponding path program 50 times [2022-02-15 01:30:06,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:06,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1128905399] [2022-02-15 01:30:06,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:06,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:06,078 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:06,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:06,080 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:06,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,325 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:07,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:07,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:07,328 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:07,328 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1128905399] [2022-02-15 01:30:07,328 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1128905399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:07,328 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:07,328 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:30:07,328 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552112146] [2022-02-15 01:30:07,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:07,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:30:07,328 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:07,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:30:07,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2707, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:30:07,329 INFO L87 Difference]: Start difference. First operand 74 states and 76 transitions. Second operand has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 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) [2022-02-15 01:30:17,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:17,600 INFO L93 Difference]: Finished difference Result 398 states and 555 transitions. [2022-02-15 01:30:17,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-15 01:30:17,600 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 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 64 [2022-02-15 01:30:17,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:17,601 INFO L225 Difference]: With dead ends: 398 [2022-02-15 01:30:17,601 INFO L226 Difference]: Without dead ends: 381 [2022-02-15 01:30:17,602 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1276 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=459, Invalid=10461, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:30:17,602 INFO L933 BasicCegarLoop]: 163 mSDtfsCounter, 442 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 20181 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 443 SdHoareTripleChecker+Valid, 395 SdHoareTripleChecker+Invalid, 20549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 20181 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:17,602 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [443 Valid, 395 Invalid, 20549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 20181 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 01:30:17,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-02-15 01:30:17,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 75. [2022-02-15 01:30:17,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 67 states have (on average 1.044776119402985) internal successors, (70), 68 states have internal predecessors, (70), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:30:17,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 77 transitions. [2022-02-15 01:30:17,668 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 77 transitions. Word has length 64 [2022-02-15 01:30:17,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:17,669 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 77 transitions. [2022-02-15 01:30:17,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1111111111111112) internal successors, (60), 53 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) [2022-02-15 01:30:17,669 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 77 transitions. [2022-02-15 01:30:17,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:30:17,669 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:17,669 INFO L514 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:17,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:30:17,669 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:17,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:17,670 INFO L85 PathProgramCache]: Analyzing trace with hash -18064590, now seen corresponding path program 51 times [2022-02-15 01:30:17,670 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:17,670 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690478593] [2022-02-15 01:30:17,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:17,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:17,671 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:17,671 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:17,673 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:17,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:18,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:18,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:18,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:18,895 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:18,895 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690478593] [2022-02-15 01:30:18,896 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1690478593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:18,896 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:18,896 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-02-15 01:30:18,896 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321348219] [2022-02-15 01:30:18,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:18,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-02-15 01:30:18,896 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:18,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-02-15 01:30:18,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:30:18,897 INFO L87 Difference]: Start difference. First operand 75 states and 77 transitions. Second operand has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2022-02-15 01:30:29,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:29,443 INFO L93 Difference]: Finished difference Result 405 states and 565 transitions. [2022-02-15 01:30:29,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:30:29,444 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:30:29,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:29,445 INFO L225 Difference]: With dead ends: 405 [2022-02-15 01:30:29,445 INFO L226 Difference]: Without dead ends: 388 [2022-02-15 01:30:29,446 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1327 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=468, Invalid=10874, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 01:30:29,446 INFO L933 BasicCegarLoop]: 166 mSDtfsCounter, 438 mSDsluCounter, 252 mSDsCounter, 0 mSdLazyCounter, 21167 mSolverCounterSat, 369 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 439 SdHoareTripleChecker+Valid, 418 SdHoareTripleChecker+Invalid, 21536 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 369 IncrementalHoareTripleChecker+Valid, 21167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:29,446 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [439 Valid, 418 Invalid, 21536 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [369 Valid, 21167 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 01:30:29,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-15 01:30:29,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 76. [2022-02-15 01:30:29,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 68 states have (on average 1.0441176470588236) internal successors, (71), 69 states have internal predecessors, (71), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:30:29,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2022-02-15 01:30:29,533 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 65 [2022-02-15 01:30:29,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:29,533 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2022-02-15 01:30:29,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1090909090909091) internal successors, (61), 54 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) [2022-02-15 01:30:29,533 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2022-02-15 01:30:29,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-15 01:30:29,533 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:29,533 INFO L514 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:29,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:30:29,534 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:29,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:29,534 INFO L85 PathProgramCache]: Analyzing trace with hash -424722198, now seen corresponding path program 52 times [2022-02-15 01:30:29,534 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:29,534 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [648613709] [2022-02-15 01:30:29,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:29,536 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:29,536 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:29,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:29,538 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:29,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:30,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:30,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:30,860 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:30,860 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [648613709] [2022-02-15 01:30:30,860 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [648613709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:30,860 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:30,860 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:30:30,860 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118776334] [2022-02-15 01:30:30,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:30,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:30:30,860 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:30,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:30:30,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=2919, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:30:30,861 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:41,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:41,724 INFO L93 Difference]: Finished difference Result 412 states and 575 transitions. [2022-02-15 01:30:41,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-15 01:30:41,724 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-15 01:30:41,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:41,727 INFO L225 Difference]: With dead ends: 412 [2022-02-15 01:30:41,727 INFO L226 Difference]: Without dead ends: 395 [2022-02-15 01:30:41,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1379 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=477, Invalid=11295, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 01:30:41,728 INFO L933 BasicCegarLoop]: 169 mSDtfsCounter, 538 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 20641 mSolverCounterSat, 422 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 311 SdHoareTripleChecker+Invalid, 21063 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 422 IncrementalHoareTripleChecker+Valid, 20641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:41,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 311 Invalid, 21063 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [422 Valid, 20641 Invalid, 0 Unknown, 0 Unchecked, 6.0s Time] [2022-02-15 01:30:41,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 395 states. [2022-02-15 01:30:41,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 395 to 77. [2022-02-15 01:30:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 70 states have internal predecessors, (72), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:30:41,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-02-15 01:30:41,800 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 66 [2022-02-15 01:30:41,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:41,800 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-02-15 01:30:41,800 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.1071428571428572) internal successors, (62), 55 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:41,800 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-02-15 01:30:41,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:30:41,800 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:41,800 INFO L514 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:41,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:30:41,801 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:41,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:41,801 INFO L85 PathProgramCache]: Analyzing trace with hash -146206158, now seen corresponding path program 53 times [2022-02-15 01:30:41,801 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:41,801 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748314725] [2022-02-15 01:30:41,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:41,802 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:41,802 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:41,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:41,805 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:41,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:42,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:42,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:42,850 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:42,850 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748314725] [2022-02-15 01:30:42,850 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748314725] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:42,850 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:42,850 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-15 01:30:42,851 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752880860] [2022-02-15 01:30:42,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:42,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-15 01:30:42,851 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:42,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-15 01:30:42,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3028, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:30:42,867 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:54,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:30:54,944 INFO L93 Difference]: Finished difference Result 419 states and 585 transitions. [2022-02-15 01:30:54,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:30:54,945 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-15 01:30:54,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:30:54,946 INFO L225 Difference]: With dead ends: 419 [2022-02-15 01:30:54,946 INFO L226 Difference]: Without dead ends: 402 [2022-02-15 01:30:54,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1432 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=486, Invalid=11724, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:30:54,947 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 494 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 22245 mSolverCounterSat, 403 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 384 SdHoareTripleChecker+Invalid, 22648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 403 IncrementalHoareTripleChecker+Valid, 22245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:30:54,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 384 Invalid, 22648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [403 Valid, 22245 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 01:30:54,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-02-15 01:30:55,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 78. [2022-02-15 01:30:55,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 70 states have (on average 1.042857142857143) internal successors, (73), 71 states have internal predecessors, (73), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:30:55,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2022-02-15 01:30:55,028 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 67 [2022-02-15 01:30:55,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:30:55,028 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2022-02-15 01:30:55,028 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.105263157894737) internal successors, (63), 56 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:30:55,028 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2022-02-15 01:30:55,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:30:55,029 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:30:55,029 INFO L514 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:30:55,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:30:55,029 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:30:55,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:30:55,029 INFO L85 PathProgramCache]: Analyzing trace with hash -102143510, now seen corresponding path program 54 times [2022-02-15 01:30:55,029 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:30:55,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016027466] [2022-02-15 01:30:55,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:30:55,030 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:30:55,030 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:30:55,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:30:55,032 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:30:55,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:56,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:30:56,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:30:56,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:30:56,411 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:30:56,411 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016027466] [2022-02-15 01:30:56,411 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016027466] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:30:56,411 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:30:56,412 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:30:56,412 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1680219569] [2022-02-15 01:30:56,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:30:56,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:30:56,412 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:30:56,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:30:56,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=3139, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:30:56,413 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:07,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:07,979 INFO L93 Difference]: Finished difference Result 426 states and 595 transitions. [2022-02-15 01:31:07,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-02-15 01:31:07,979 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:31:07,980 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:07,981 INFO L225 Difference]: With dead ends: 426 [2022-02-15 01:31:07,981 INFO L226 Difference]: Without dead ends: 409 [2022-02-15 01:31:07,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1486 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=495, Invalid=12161, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 01:31:07,982 INFO L933 BasicCegarLoop]: 175 mSDtfsCounter, 586 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 21817 mSolverCounterSat, 452 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 22269 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 452 IncrementalHoareTripleChecker+Valid, 21817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:07,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [587 Valid, 287 Invalid, 22269 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [452 Valid, 21817 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-15 01:31:07,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 409 states. [2022-02-15 01:31:08,069 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 409 to 79. [2022-02-15 01:31:08,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 72 states have internal predecessors, (74), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:31:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-02-15 01:31:08,070 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 68 [2022-02-15 01:31:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:08,070 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-02-15 01:31:08,070 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.103448275862069) internal successors, (64), 57 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:08,070 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-02-15 01:31:08,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-15 01:31:08,070 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:08,071 INFO L514 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:08,071 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:31:08,071 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:08,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:08,071 INFO L85 PathProgramCache]: Analyzing trace with hash 1263798578, now seen corresponding path program 55 times [2022-02-15 01:31:08,071 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:08,071 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [129658612] [2022-02-15 01:31:08,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:08,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:08,072 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:08,072 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:08,074 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:09,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:09,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:09,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:09,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:09,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [129658612] [2022-02-15 01:31:09,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [129658612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:09,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:09,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-15 01:31:09,471 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103392935] [2022-02-15 01:31:09,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:09,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-15 01:31:09,471 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:09,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-15 01:31:09,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3252, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:31:09,472 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:21,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:21,730 INFO L93 Difference]: Finished difference Result 433 states and 605 transitions. [2022-02-15 01:31:21,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:31:21,731 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-15 01:31:21,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:21,732 INFO L225 Difference]: With dead ends: 433 [2022-02-15 01:31:21,732 INFO L226 Difference]: Without dead ends: 416 [2022-02-15 01:31:21,733 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1541 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=504, Invalid=12606, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:31:21,733 INFO L933 BasicCegarLoop]: 178 mSDtfsCounter, 570 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 23037 mSolverCounterSat, 447 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 571 SdHoareTripleChecker+Valid, 325 SdHoareTripleChecker+Invalid, 23484 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 447 IncrementalHoareTripleChecker+Valid, 23037 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:21,734 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [571 Valid, 325 Invalid, 23484 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [447 Valid, 23037 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-15 01:31:21,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 416 states. [2022-02-15 01:31:21,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 416 to 80. [2022-02-15 01:31:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 73 states have internal predecessors, (75), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:31:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 82 transitions. [2022-02-15 01:31:21,837 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 82 transitions. Word has length 69 [2022-02-15 01:31:21,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:21,837 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 82 transitions. [2022-02-15 01:31:21,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.1016949152542372) internal successors, (65), 58 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:21,837 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 82 transitions. [2022-02-15 01:31:21,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-15 01:31:21,838 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:21,838 INFO L514 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:21,838 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:31:21,838 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:21,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:21,838 INFO L85 PathProgramCache]: Analyzing trace with hash 658330346, now seen corresponding path program 56 times [2022-02-15 01:31:21,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:21,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1690923265] [2022-02-15 01:31:21,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:21,839 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:21,839 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:21,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:21,842 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:21,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:23,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:23,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:23,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:23,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1690923265] [2022-02-15 01:31:23,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1690923265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:23,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:23,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:31:23,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756720383] [2022-02-15 01:31:23,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:23,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:31:23,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:23,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:31:23,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3367, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:31:23,340 INFO L87 Difference]: Start difference. First operand 80 states and 82 transitions. Second operand has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:36,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:36,828 INFO L93 Difference]: Finished difference Result 440 states and 615 transitions. [2022-02-15 01:31:36,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-15 01:31:36,828 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-15 01:31:36,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:36,829 INFO L225 Difference]: With dead ends: 440 [2022-02-15 01:31:36,829 INFO L226 Difference]: Without dead ends: 423 [2022-02-15 01:31:36,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1597 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=513, Invalid=13059, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:31:36,830 INFO L933 BasicCegarLoop]: 181 mSDtfsCounter, 562 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 24159 mSolverCounterSat, 446 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 353 SdHoareTripleChecker+Invalid, 24605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 446 IncrementalHoareTripleChecker+Valid, 24159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:36,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 353 Invalid, 24605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [446 Valid, 24159 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 01:31:36,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-02-15 01:31:36,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 81. [2022-02-15 01:31:36,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 73 states have (on average 1.0410958904109588) internal successors, (76), 74 states have internal predecessors, (76), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:31:36,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 83 transitions. [2022-02-15 01:31:36,934 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 83 transitions. Word has length 70 [2022-02-15 01:31:36,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:36,934 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 83 transitions. [2022-02-15 01:31:36,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.1) internal successors, (66), 59 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:36,935 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 83 transitions. [2022-02-15 01:31:36,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:31:36,935 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:36,935 INFO L514 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:36,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:31:36,935 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:36,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:36,935 INFO L85 PathProgramCache]: Analyzing trace with hash -931315662, now seen corresponding path program 57 times [2022-02-15 01:31:36,935 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:36,935 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1356492679] [2022-02-15 01:31:36,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:36,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:36,936 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:36,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:36,939 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:37,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:38,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:38,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:38,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:38,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1356492679] [2022-02-15 01:31:38,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1356492679] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:38,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:38,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-15 01:31:38,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143812551] [2022-02-15 01:31:38,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:38,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-15 01:31:38,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:38,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-15 01:31:38,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=176, Invalid=3484, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:31:38,206 INFO L87 Difference]: Start difference. First operand 81 states and 83 transitions. Second operand has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:51,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:31:51,699 INFO L93 Difference]: Finished difference Result 447 states and 625 transitions. [2022-02-15 01:31:51,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 01:31:51,699 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:31:51,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:31:51,701 INFO L225 Difference]: With dead ends: 447 [2022-02-15 01:31:51,701 INFO L226 Difference]: Without dead ends: 430 [2022-02-15 01:31:51,702 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1654 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=522, Invalid=13520, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 01:31:51,703 INFO L933 BasicCegarLoop]: 184 mSDtfsCounter, 522 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 25817 mSolverCounterSat, 429 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 523 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 26246 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 429 IncrementalHoareTripleChecker+Valid, 25817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:31:51,703 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [523 Valid, 421 Invalid, 26246 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [429 Valid, 25817 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 01:31:51,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-15 01:31:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 82. [2022-02-15 01:31:51,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 74 states have (on average 1.0405405405405406) internal successors, (77), 75 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:31:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2022-02-15 01:31:51,793 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 71 [2022-02-15 01:31:51,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:31:51,793 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2022-02-15 01:31:51,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.098360655737705) internal successors, (67), 60 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:31:51,793 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2022-02-15 01:31:51,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-02-15 01:31:51,793 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:31:51,793 INFO L514 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:31:51,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:31:51,794 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:31:51,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:31:51,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1329265642, now seen corresponding path program 58 times [2022-02-15 01:31:51,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:31:51,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [796824910] [2022-02-15 01:31:51,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:31:51,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:31:51,795 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:31:51,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:31:51,798 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:31:51,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:53,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:31:53,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:31:53,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:31:53,124 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:31:53,124 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [796824910] [2022-02-15 01:31:53,124 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [796824910] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:31:53,124 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:31:53,124 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:31:53,124 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40255532] [2022-02-15 01:31:53,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:31:53,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:31:53,124 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:31:53,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:31:53,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=3603, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:31:53,125 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:05,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:05,632 INFO L93 Difference]: Finished difference Result 454 states and 635 transitions. [2022-02-15 01:32:05,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-02-15 01:32:05,632 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 72 [2022-02-15 01:32:05,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:05,634 INFO L225 Difference]: With dead ends: 454 [2022-02-15 01:32:05,634 INFO L226 Difference]: Without dead ends: 437 [2022-02-15 01:32:05,635 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1712 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=531, Invalid=13989, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 01:32:05,635 INFO L933 BasicCegarLoop]: 187 mSDtfsCounter, 602 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 25565 mSolverCounterSat, 472 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 26037 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 472 IncrementalHoareTripleChecker+Valid, 25565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:05,635 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 339 Invalid, 26037 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [472 Valid, 25565 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-15 01:32:05,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 437 states. [2022-02-15 01:32:05,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 437 to 83. [2022-02-15 01:32:05,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 75 states have (on average 1.04) internal successors, (78), 76 states have internal predecessors, (78), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:32:05,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 85 transitions. [2022-02-15 01:32:05,722 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 85 transitions. Word has length 72 [2022-02-15 01:32:05,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:05,722 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 85 transitions. [2022-02-15 01:32:05,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.096774193548387) internal successors, (68), 61 states have internal predecessors, (68), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:05,722 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 85 transitions. [2022-02-15 01:32:05,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:32:05,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:05,723 INFO L514 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:05,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:32:05,723 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:05,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:05,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1607157966, now seen corresponding path program 59 times [2022-02-15 01:32:05,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:05,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576449994] [2022-02-15 01:32:05,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:05,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:05,724 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:05,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:05,727 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:05,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:06,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:06,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:06,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:06,926 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:06,927 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576449994] [2022-02-15 01:32:06,927 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [576449994] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:06,927 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:06,927 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-15 01:32:06,927 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090988653] [2022-02-15 01:32:06,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:06,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-15 01:32:06,927 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:06,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-15 01:32:06,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3724, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:32:06,928 INFO L87 Difference]: Start difference. First operand 83 states and 85 transitions. Second operand has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:20,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:20,292 INFO L93 Difference]: Finished difference Result 461 states and 645 transitions. [2022-02-15 01:32:20,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:32:20,292 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 01:32:20,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:20,294 INFO L225 Difference]: With dead ends: 461 [2022-02-15 01:32:20,294 INFO L226 Difference]: Without dead ends: 444 [2022-02-15 01:32:20,295 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1771 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=540, Invalid=14466, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:32:20,295 INFO L933 BasicCegarLoop]: 190 mSDtfsCounter, 622 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 26283 mSolverCounterSat, 485 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 623 SdHoareTripleChecker+Valid, 332 SdHoareTripleChecker+Invalid, 26768 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 485 IncrementalHoareTripleChecker+Valid, 26283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:20,295 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [623 Valid, 332 Invalid, 26768 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [485 Valid, 26283 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-15 01:32:20,295 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 444 states. [2022-02-15 01:32:20,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 444 to 84. [2022-02-15 01:32:20,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 76 states have (on average 1.0394736842105263) internal successors, (79), 77 states have internal predecessors, (79), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:32:20,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2022-02-15 01:32:20,398 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 73 [2022-02-15 01:32:20,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:20,398 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2022-02-15 01:32:20,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0952380952380953) internal successors, (69), 62 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:20,399 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2022-02-15 01:32:20,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:32:20,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:20,399 INFO L514 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:20,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:32:20,399 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:20,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:20,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1852990698, now seen corresponding path program 60 times [2022-02-15 01:32:20,399 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:20,399 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [159995315] [2022-02-15 01:32:20,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:20,400 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:20,400 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:20,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:20,403 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:20,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:22,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:22,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:22,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:22,009 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:22,009 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [159995315] [2022-02-15 01:32:22,009 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [159995315] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:22,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:22,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:32:22,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483118350] [2022-02-15 01:32:22,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:22,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:32:22,010 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:22,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:32:22,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=3847, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:32:22,011 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:37,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:37,996 INFO L93 Difference]: Finished difference Result 468 states and 655 transitions. [2022-02-15 01:32:37,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-02-15 01:32:37,997 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:32:37,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:37,999 INFO L225 Difference]: With dead ends: 468 [2022-02-15 01:32:37,999 INFO L226 Difference]: Without dead ends: 451 [2022-02-15 01:32:38,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1831 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=549, Invalid=14951, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 01:32:38,000 INFO L933 BasicCegarLoop]: 193 mSDtfsCounter, 518 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 29088 mSolverCounterSat, 436 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 29524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 436 IncrementalHoareTripleChecker+Valid, 29088 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:38,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [519 Valid, 480 Invalid, 29524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [436 Valid, 29088 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-02-15 01:32:38,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-15 01:32:38,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 85. [2022-02-15 01:32:38,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 78 states have internal predecessors, (80), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:32:38,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 87 transitions. [2022-02-15 01:32:38,102 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 87 transitions. Word has length 74 [2022-02-15 01:32:38,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:38,102 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 87 transitions. [2022-02-15 01:32:38,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.09375) internal successors, (70), 63 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:38,102 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 87 transitions. [2022-02-15 01:32:38,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-15 01:32:38,103 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:38,103 INFO L514 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:38,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:32:38,103 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:38,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:38,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1743416882, now seen corresponding path program 61 times [2022-02-15 01:32:38,104 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:38,104 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1326109150] [2022-02-15 01:32:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:38,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:38,105 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:38,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:38,111 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:39,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:39,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:39,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:39,734 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:39,734 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1326109150] [2022-02-15 01:32:39,734 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1326109150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:39,734 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:39,734 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-15 01:32:39,734 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992970624] [2022-02-15 01:32:39,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:39,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-15 01:32:39,735 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-15 01:32:39,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=3972, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:32:39,736 INFO L87 Difference]: Start difference. First operand 85 states and 87 transitions. Second operand has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:55,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:32:55,463 INFO L93 Difference]: Finished difference Result 475 states and 665 transitions. [2022-02-15 01:32:55,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:32:55,463 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-02-15 01:32:55,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:32:55,469 INFO L225 Difference]: With dead ends: 475 [2022-02-15 01:32:55,469 INFO L226 Difference]: Without dead ends: 458 [2022-02-15 01:32:55,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1892 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=558, Invalid=15444, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:32:55,470 INFO L933 BasicCegarLoop]: 196 mSDtfsCounter, 654 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 27885 mSolverCounterSat, 507 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 328 SdHoareTripleChecker+Invalid, 28392 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 507 IncrementalHoareTripleChecker+Valid, 27885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:32:55,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 328 Invalid, 28392 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [507 Valid, 27885 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-02-15 01:32:55,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2022-02-15 01:32:55,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 86. [2022-02-15 01:32:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 78 states have (on average 1.0384615384615385) internal successors, (81), 79 states have internal predecessors, (81), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:32:55,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 88 transitions. [2022-02-15 01:32:55,586 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 88 transitions. Word has length 75 [2022-02-15 01:32:55,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:32:55,586 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 88 transitions. [2022-02-15 01:32:55,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0923076923076922) internal successors, (71), 64 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:32:55,587 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 88 transitions. [2022-02-15 01:32:55,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-02-15 01:32:55,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:32:55,587 INFO L514 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:32:55,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:32:55,587 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:32:55,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:32:55,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1653371414, now seen corresponding path program 62 times [2022-02-15 01:32:55,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:32:55,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1785971021] [2022-02-15 01:32:55,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:32:55,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:32:55,588 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:32:55,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:32:55,591 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:32:55,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:57,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:32:57,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:32:57,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:32:57,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:32:57,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1785971021] [2022-02-15 01:32:57,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1785971021] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:32:57,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:32:57,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 01:32:57,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047998309] [2022-02-15 01:32:57,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:32:57,405 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 01:32:57,405 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:32:57,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 01:32:57,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4099, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:32:57,406 INFO L87 Difference]: Start difference. First operand 86 states and 88 transitions. Second operand has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:13,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:13,712 INFO L93 Difference]: Finished difference Result 482 states and 675 transitions. [2022-02-15 01:33:13,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-15 01:33:13,712 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 76 [2022-02-15 01:33:13,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:13,714 INFO L225 Difference]: With dead ends: 482 [2022-02-15 01:33:13,714 INFO L226 Difference]: Without dead ends: 465 [2022-02-15 01:33:13,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1954 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=567, Invalid=15945, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:33:13,715 INFO L933 BasicCegarLoop]: 199 mSDtfsCounter, 594 mSDsluCounter, 222 mSDsCounter, 0 mSdLazyCounter, 30015 mSolverCounterSat, 480 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 30495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 480 IncrementalHoareTripleChecker+Valid, 30015 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:13,721 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 421 Invalid, 30495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [480 Valid, 30015 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 01:33:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2022-02-15 01:33:13,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 87. [2022-02-15 01:33:13,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.0379746835443038) internal successors, (82), 80 states have internal predecessors, (82), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:33:13,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-02-15 01:33:13,834 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 76 [2022-02-15 01:33:13,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:13,834 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-02-15 01:33:13,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0909090909090908) internal successors, (72), 65 states have internal predecessors, (72), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:33:13,834 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-02-15 01:33:13,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:33:13,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:13,834 INFO L514 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:13,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:33:13,835 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:13,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:13,835 INFO L85 PathProgramCache]: Analyzing trace with hash 420373810, now seen corresponding path program 63 times [2022-02-15 01:33:13,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:13,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1550493829] [2022-02-15 01:33:13,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:13,836 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:13,836 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:13,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:13,838 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:13,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:15,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:33:15,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:15,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:15,646 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:15,646 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1550493829] [2022-02-15 01:33:15,646 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1550493829] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:15,646 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:15,646 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-15 01:33:15,646 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080837576] [2022-02-15 01:33:15,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:15,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-15 01:33:15,646 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:15,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-15 01:33:15,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=194, Invalid=4228, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:33:15,647 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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) [2022-02-15 01:33:32,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:32,639 INFO L93 Difference]: Finished difference Result 489 states and 685 transitions. [2022-02-15 01:33:32,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 01:33:32,640 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:33:32,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:32,641 INFO L225 Difference]: With dead ends: 489 [2022-02-15 01:33:32,641 INFO L226 Difference]: Without dead ends: 472 [2022-02-15 01:33:32,642 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2017 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=576, Invalid=16454, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 01:33:32,643 INFO L933 BasicCegarLoop]: 202 mSDtfsCounter, 558 mSDsluCounter, 282 mSDsCounter, 0 mSdLazyCounter, 31775 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 484 SdHoareTripleChecker+Invalid, 32240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 31775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:32,643 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 484 Invalid, 32240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 31775 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-02-15 01:33:32,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 472 states. [2022-02-15 01:33:32,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 472 to 88. [2022-02-15 01:33:32,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 80 states have (on average 1.0375) internal successors, (83), 81 states have internal predecessors, (83), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:33:32,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2022-02-15 01:33:32,758 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 77 [2022-02-15 01:33:32,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:32,758 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2022-02-15 01:33:32,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0895522388059702) internal successors, (73), 66 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) [2022-02-15 01:33:32,759 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2022-02-15 01:33:32,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-02-15 01:33:32,759 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:32,759 INFO L514 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:32,759 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:33:32,759 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:32,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:32,759 INFO L85 PathProgramCache]: Analyzing trace with hash 281966314, now seen corresponding path program 64 times [2022-02-15 01:33:32,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:32,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1347974665] [2022-02-15 01:33:32,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:32,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:32,761 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:32,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:32,763 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:32,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:33,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:33:33,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:33,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:33,946 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:33,946 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1347974665] [2022-02-15 01:33:33,946 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1347974665] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:33,946 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:33,946 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:33:33,946 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098690313] [2022-02-15 01:33:33,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:33,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:33:33,946 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:33,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:33:33,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=4359, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:33:33,947 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 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) [2022-02-15 01:33:52,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:33:52,082 INFO L93 Difference]: Finished difference Result 496 states and 695 transitions. [2022-02-15 01:33:52,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-02-15 01:33:52,082 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 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 78 [2022-02-15 01:33:52,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:33:52,084 INFO L225 Difference]: With dead ends: 496 [2022-02-15 01:33:52,084 INFO L226 Difference]: Without dead ends: 479 [2022-02-15 01:33:52,085 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2081 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=585, Invalid=16971, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 01:33:52,086 INFO L933 BasicCegarLoop]: 205 mSDtfsCounter, 610 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 32011 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 611 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 32505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 32011 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:33:52,086 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [611 Valid, 437 Invalid, 32505 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 32011 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-02-15 01:33:52,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2022-02-15 01:33:52,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 89. [2022-02-15 01:33:52,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.037037037037037) internal successors, (84), 82 states have internal predecessors, (84), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:33:52,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 91 transitions. [2022-02-15 01:33:52,230 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 91 transitions. Word has length 78 [2022-02-15 01:33:52,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:33:52,230 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 91 transitions. [2022-02-15 01:33:52,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.088235294117647) internal successors, (74), 67 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) [2022-02-15 01:33:52,230 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 91 transitions. [2022-02-15 01:33:52,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:33:52,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:33:52,230 INFO L514 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:33:52,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:33:52,230 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:33:52,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:33:52,231 INFO L85 PathProgramCache]: Analyzing trace with hash 286301234, now seen corresponding path program 65 times [2022-02-15 01:33:52,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:33:52,231 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [972917276] [2022-02-15 01:33:52,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:33:52,232 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:33:52,232 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:33:52,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:33:52,234 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:33:52,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:54,054 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:33:54,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:33:54,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:33:54,057 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:33:54,057 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [972917276] [2022-02-15 01:33:54,057 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [972917276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:33:54,057 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:33:54,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-15 01:33:54,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869369466] [2022-02-15 01:33:54,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:33:54,058 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-15 01:33:54,058 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:33:54,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-15 01:33:54,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4492, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:33:54,059 INFO L87 Difference]: Start difference. First operand 89 states and 91 transitions. Second operand has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:12,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:12,604 INFO L93 Difference]: Finished difference Result 503 states and 705 transitions. [2022-02-15 01:34:12,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:34:12,604 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-15 01:34:12,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:12,607 INFO L225 Difference]: With dead ends: 503 [2022-02-15 01:34:12,607 INFO L226 Difference]: Without dead ends: 486 [2022-02-15 01:34:12,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2146 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=594, Invalid=17496, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:34:12,609 INFO L933 BasicCegarLoop]: 208 mSDtfsCounter, 602 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 33321 mSolverCounterSat, 493 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 465 SdHoareTripleChecker+Invalid, 33814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 493 IncrementalHoareTripleChecker+Valid, 33321 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:12,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [603 Valid, 465 Invalid, 33814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [493 Valid, 33321 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-02-15 01:34:12,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2022-02-15 01:34:12,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 90. [2022-02-15 01:34:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 82 states have (on average 1.0365853658536586) internal successors, (85), 83 states have internal predecessors, (85), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:34:12,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2022-02-15 01:34:12,732 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 79 [2022-02-15 01:34:12,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:12,732 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2022-02-15 01:34:12,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0869565217391304) internal successors, (75), 68 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:12,733 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2022-02-15 01:34:12,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:34:12,733 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:12,733 INFO L514 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:34:12,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:34:12,733 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:12,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:12,733 INFO L85 PathProgramCache]: Analyzing trace with hash 420683754, now seen corresponding path program 66 times [2022-02-15 01:34:12,733 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:12,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264340834] [2022-02-15 01:34:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:12,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:34:12,735 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:34:12,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:12,738 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:34:12,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:14,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:14,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:14,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:14,678 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:14,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264340834] [2022-02-15 01:34:14,678 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264340834] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:14,678 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:14,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 01:34:14,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886779496] [2022-02-15 01:34:14,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:14,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 01:34:14,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:14,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 01:34:14,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=4627, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:34:14,679 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:34,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:34,062 INFO L93 Difference]: Finished difference Result 510 states and 715 transitions. [2022-02-15 01:34:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-02-15 01:34:34,062 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:34:34,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:34,064 INFO L225 Difference]: With dead ends: 510 [2022-02-15 01:34:34,064 INFO L226 Difference]: Without dead ends: 493 [2022-02-15 01:34:34,065 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 135 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2212 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=603, Invalid=18029, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 01:34:34,065 INFO L933 BasicCegarLoop]: 211 mSDtfsCounter, 598 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 34582 mSolverCounterSat, 494 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 599 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 35076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 494 IncrementalHoareTripleChecker+Valid, 34582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:34,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [599 Valid, 488 Invalid, 35076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [494 Valid, 34582 Invalid, 0 Unknown, 0 Unchecked, 9.6s Time] [2022-02-15 01:34:34,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-02-15 01:34:34,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 91. [2022-02-15 01:34:34,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 83 states have (on average 1.036144578313253) internal successors, (86), 84 states have internal predecessors, (86), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:34:34,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 93 transitions. [2022-02-15 01:34:34,225 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 93 transitions. Word has length 80 [2022-02-15 01:34:34,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:34,225 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 93 transitions. [2022-02-15 01:34:34,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0857142857142856) internal successors, (76), 69 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:34,225 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 93 transitions. [2022-02-15 01:34:34,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-15 01:34:34,225 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:34,226 INFO L514 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:34:34,226 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:34:34,226 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:34,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:34,226 INFO L85 PathProgramCache]: Analyzing trace with hash 291574578, now seen corresponding path program 67 times [2022-02-15 01:34:34,226 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:34,226 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218181225] [2022-02-15 01:34:34,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:34,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:34:34,227 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:34:34,227 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:34,230 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:34:34,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:36,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:36,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:36,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:36,233 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:36,233 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218181225] [2022-02-15 01:34:36,233 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [218181225] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:36,233 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:36,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-15 01:34:36,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305645304] [2022-02-15 01:34:36,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:36,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-15 01:34:36,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:36,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-15 01:34:36,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=206, Invalid=4764, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:34:36,234 INFO L87 Difference]: Start difference. First operand 91 states and 93 transitions. Second operand has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:57,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:34:57,283 INFO L93 Difference]: Finished difference Result 517 states and 725 transitions. [2022-02-15 01:34:57,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:34:57,283 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-15 01:34:57,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:34:57,285 INFO L225 Difference]: With dead ends: 517 [2022-02-15 01:34:57,285 INFO L226 Difference]: Without dead ends: 500 [2022-02-15 01:34:57,286 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2279 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=612, Invalid=18570, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 01:34:57,307 INFO L933 BasicCegarLoop]: 214 mSDtfsCounter, 650 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 34829 mSolverCounterSat, 523 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 441 SdHoareTripleChecker+Invalid, 35352 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 523 IncrementalHoareTripleChecker+Valid, 34829 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:34:57,307 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 441 Invalid, 35352 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [523 Valid, 34829 Invalid, 0 Unknown, 0 Unchecked, 10.6s Time] [2022-02-15 01:34:57,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-02-15 01:34:57,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 92. [2022-02-15 01:34:57,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 84 states have (on average 1.0357142857142858) internal successors, (87), 85 states have internal predecessors, (87), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:34:57,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 94 transitions. [2022-02-15 01:34:57,451 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 94 transitions. Word has length 81 [2022-02-15 01:34:57,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:34:57,451 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 94 transitions. [2022-02-15 01:34:57,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.0845070422535212) internal successors, (77), 70 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:34:57,451 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 94 transitions. [2022-02-15 01:34:57,451 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-15 01:34:57,451 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:34:57,451 INFO L514 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:34:57,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:34:57,455 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:34:57,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:34:57,455 INFO L85 PathProgramCache]: Analyzing trace with hash 584157418, now seen corresponding path program 68 times [2022-02-15 01:34:57,455 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:34:57,455 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1383826338] [2022-02-15 01:34:57,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:34:57,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:34:57,456 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:34:57,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:34:57,459 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:34:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:59,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:34:59,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:34:59,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:34:59,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:34:59,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1383826338] [2022-02-15 01:34:59,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1383826338] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:34:59,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:34:59,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 01:34:59,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894223808] [2022-02-15 01:34:59,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:34:59,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 01:34:59,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:34:59,438 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 01:34:59,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=4903, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:34:59,439 INFO L87 Difference]: Start difference. First operand 92 states and 94 transitions. Second operand has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:21,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:21,086 INFO L93 Difference]: Finished difference Result 524 states and 735 transitions. [2022-02-15 01:35:21,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-15 01:35:21,087 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-15 01:35:21,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:21,088 INFO L225 Difference]: With dead ends: 524 [2022-02-15 01:35:21,088 INFO L226 Difference]: Without dead ends: 507 [2022-02-15 01:35:21,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2347 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=621, Invalid=19119, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:35:21,090 INFO L933 BasicCegarLoop]: 217 mSDtfsCounter, 626 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 36495 mSolverCounterSat, 514 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 627 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 37009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 514 IncrementalHoareTripleChecker+Valid, 36495 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:21,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [627 Valid, 489 Invalid, 37009 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [514 Valid, 36495 Invalid, 0 Unknown, 0 Unchecked, 10.9s Time] [2022-02-15 01:35:21,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-02-15 01:35:21,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 93. [2022-02-15 01:35:21,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 85 states have (on average 1.035294117647059) internal successors, (88), 86 states have internal predecessors, (88), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:35:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 95 transitions. [2022-02-15 01:35:21,241 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 95 transitions. Word has length 82 [2022-02-15 01:35:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:21,241 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 95 transitions. [2022-02-15 01:35:21,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0833333333333333) internal successors, (78), 71 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:21,241 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 95 transitions. [2022-02-15 01:35:21,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:35:21,241 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:21,241 INFO L514 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:35:21,242 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:35:21,242 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:21,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:21,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1064290866, now seen corresponding path program 69 times [2022-02-15 01:35:21,242 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:21,242 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680625856] [2022-02-15 01:35:21,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:21,243 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:35:21,243 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:35:21,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:21,246 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:35:21,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:22,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:22,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:22,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:35:22,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:22,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680625856] [2022-02-15 01:35:22,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680625856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:22,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:22,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-15 01:35:22,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992195556] [2022-02-15 01:35:22,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:22,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-15 01:35:22,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:22,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-15 01:35:22,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=5044, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:35:22,678 INFO L87 Difference]: Start difference. First operand 93 states and 95 transitions. Second operand has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:44,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:35:44,754 INFO L93 Difference]: Finished difference Result 531 states and 745 transitions. [2022-02-15 01:35:44,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 01:35:44,755 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:35:44,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:35:44,757 INFO L225 Difference]: With dead ends: 531 [2022-02-15 01:35:44,757 INFO L226 Difference]: Without dead ends: 514 [2022-02-15 01:35:44,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2416 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=630, Invalid=19676, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 01:35:44,758 INFO L933 BasicCegarLoop]: 220 mSDtfsCounter, 594 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 38345 mSolverCounterSat, 501 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 38846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 501 IncrementalHoareTripleChecker+Valid, 38345 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:35:44,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 547 Invalid, 38846 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [501 Valid, 38345 Invalid, 0 Unknown, 0 Unchecked, 11.0s Time] [2022-02-15 01:35:44,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 514 states. [2022-02-15 01:35:44,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 514 to 94. [2022-02-15 01:35:44,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 86 states have (on average 1.0348837209302326) internal successors, (89), 87 states have internal predecessors, (89), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:35:44,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2022-02-15 01:35:44,906 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 83 [2022-02-15 01:35:44,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:35:44,906 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2022-02-15 01:35:44,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.082191780821918) internal successors, (79), 72 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:35:44,907 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2022-02-15 01:35:44,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-15 01:35:44,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:35:44,907 INFO L514 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:35:44,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:35:44,907 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:35:44,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:35:44,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1231441430, now seen corresponding path program 70 times [2022-02-15 01:35:44,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:35:44,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264653645] [2022-02-15 01:35:44,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:35:44,909 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:35:44,909 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:35:44,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:35:44,912 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:35:44,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:47,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:35:47,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:35:47,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:35:47,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:35:47,095 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264653645] [2022-02-15 01:35:47,095 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264653645] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:35:47,095 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:35:47,095 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:35:47,095 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035438627] [2022-02-15 01:35:47,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:35:47,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:35:47,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:35:47,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:35:47,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=215, Invalid=5187, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:35:47,097 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:10,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:10,701 INFO L93 Difference]: Finished difference Result 538 states and 755 transitions. [2022-02-15 01:36:10,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-02-15 01:36:10,702 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 84 [2022-02-15 01:36:10,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:10,703 INFO L225 Difference]: With dead ends: 538 [2022-02-15 01:36:10,704 INFO L226 Difference]: Without dead ends: 521 [2022-02-15 01:36:10,704 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2486 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=639, Invalid=20241, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 01:36:10,705 INFO L933 BasicCegarLoop]: 223 mSDtfsCounter, 810 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 35457 mSolverCounterSat, 612 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 811 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 36069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 612 IncrementalHoareTripleChecker+Valid, 35457 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:10,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [811 Valid, 295 Invalid, 36069 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [612 Valid, 35457 Invalid, 0 Unknown, 0 Unchecked, 11.3s Time] [2022-02-15 01:36:10,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 521 states. [2022-02-15 01:36:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 521 to 95. [2022-02-15 01:36:10,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 88 states have internal predecessors, (90), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:36:10,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 97 transitions. [2022-02-15 01:36:10,839 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 97 transitions. Word has length 84 [2022-02-15 01:36:10,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:10,839 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 97 transitions. [2022-02-15 01:36:10,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.0810810810810811) internal successors, (80), 73 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:10,839 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 97 transitions. [2022-02-15 01:36:10,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 01:36:10,840 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:10,840 INFO L514 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:10,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:36:10,840 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:10,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:10,840 INFO L85 PathProgramCache]: Analyzing trace with hash 615301426, now seen corresponding path program 71 times [2022-02-15 01:36:10,840 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:10,840 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2012442683] [2022-02-15 01:36:10,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:10,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:10,841 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:36:10,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:10,844 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:10,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:12,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:12,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:12,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:12,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:12,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2012442683] [2022-02-15 01:36:12,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2012442683] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:12,672 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:12,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-15 01:36:12,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210844624] [2022-02-15 01:36:12,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:12,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-15 01:36:12,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:12,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-15 01:36:12,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5332, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:36:12,674 INFO L87 Difference]: Start difference. First operand 95 states and 97 transitions. Second operand has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:35,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:36:35,119 INFO L93 Difference]: Finished difference Result 545 states and 765 transitions. [2022-02-15 01:36:35,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:36:35,119 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-15 01:36:35,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:36:35,125 INFO L225 Difference]: With dead ends: 545 [2022-02-15 01:36:35,125 INFO L226 Difference]: Without dead ends: 528 [2022-02-15 01:36:35,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2557 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=648, Invalid=20814, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:36:35,126 INFO L933 BasicCegarLoop]: 226 mSDtfsCounter, 658 mSDsluCounter, 277 mSDsCounter, 0 mSdLazyCounter, 39657 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 659 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 40196 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 39657 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:36:35,127 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [659 Valid, 503 Invalid, 40196 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 39657 Invalid, 0 Unknown, 0 Unchecked, 11.1s Time] [2022-02-15 01:36:35,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2022-02-15 01:36:35,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 96. [2022-02-15 01:36:35,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 88 states have (on average 1.0340909090909092) internal successors, (91), 89 states have internal predecessors, (91), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:36:35,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2022-02-15 01:36:35,283 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 85 [2022-02-15 01:36:35,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:36:35,283 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2022-02-15 01:36:35,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.08) internal successors, (81), 74 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:36:35,284 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2022-02-15 01:36:35,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:36:35,284 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:36:35,284 INFO L514 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:36:35,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:36:35,284 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:36:35,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:36:35,284 INFO L85 PathProgramCache]: Analyzing trace with hash 2029755114, now seen corresponding path program 72 times [2022-02-15 01:36:35,284 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:36:35,285 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1241591617] [2022-02-15 01:36:35,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:36:35,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:36:35,286 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:36:35,286 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:36:35,289 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:36:35,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:37,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:36:37,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:36:37,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:36:37,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:36:37,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1241591617] [2022-02-15 01:36:37,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1241591617] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:36:37,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:36:37,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 01:36:37,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186285129] [2022-02-15 01:36:37,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:36:37,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 01:36:37,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:36:37,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 01:36:37,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=5479, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:36:37,542 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:01,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:01,316 INFO L93 Difference]: Finished difference Result 552 states and 775 transitions. [2022-02-15 01:37:01,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-02-15 01:37:01,317 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:37:01,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:01,320 INFO L225 Difference]: With dead ends: 552 [2022-02-15 01:37:01,320 INFO L226 Difference]: Without dead ends: 535 [2022-02-15 01:37:01,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 147 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2629 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=657, Invalid=21395, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 01:37:01,323 INFO L933 BasicCegarLoop]: 229 mSDtfsCounter, 678 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 40556 mSolverCounterSat, 552 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 679 SdHoareTripleChecker+Valid, 496 SdHoareTripleChecker+Invalid, 41108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 552 IncrementalHoareTripleChecker+Valid, 40556 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:01,323 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [679 Valid, 496 Invalid, 41108 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [552 Valid, 40556 Invalid, 0 Unknown, 0 Unchecked, 11.7s Time] [2022-02-15 01:37:01,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-15 01:37:01,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 97. [2022-02-15 01:37:01,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 90 states have internal predecessors, (92), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:37:01,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-02-15 01:37:01,496 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 86 [2022-02-15 01:37:01,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:01,496 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-02-15 01:37:01,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0789473684210527) internal successors, (82), 75 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:01,496 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-02-15 01:37:01,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-02-15 01:37:01,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:01,497 INFO L514 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:01,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:37:01,497 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:01,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:01,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1366820814, now seen corresponding path program 73 times [2022-02-15 01:37:01,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:01,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182679869] [2022-02-15 01:37:01,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:01,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:01,498 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:37:01,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:01,501 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:37:01,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:03,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:03,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:03,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:03,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:03,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182679869] [2022-02-15 01:37:03,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [182679869] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:03,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:03,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-15 01:37:03,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591145048] [2022-02-15 01:37:03,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:03,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-15 01:37:03,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:03,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-15 01:37:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=224, Invalid=5628, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:37:03,448 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:27,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:27,504 INFO L93 Difference]: Finished difference Result 559 states and 785 transitions. [2022-02-15 01:37:27,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 01:37:27,505 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-02-15 01:37:27,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:27,506 INFO L225 Difference]: With dead ends: 559 [2022-02-15 01:37:27,507 INFO L226 Difference]: Without dead ends: 542 [2022-02-15 01:37:27,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2702 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=666, Invalid=21984, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 01:37:27,508 INFO L933 BasicCegarLoop]: 232 mSDtfsCounter, 806 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 39305 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 354 SdHoareTripleChecker+Invalid, 39924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 39305 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 11.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:27,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [807 Valid, 354 Invalid, 39924 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [619 Valid, 39305 Invalid, 0 Unknown, 0 Unchecked, 11.4s Time] [2022-02-15 01:37:27,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 542 states. [2022-02-15 01:37:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 542 to 98. [2022-02-15 01:37:27,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 90 states have (on average 1.0333333333333334) internal successors, (93), 91 states have internal predecessors, (93), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:37:27,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 100 transitions. [2022-02-15 01:37:27,661 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 100 transitions. Word has length 87 [2022-02-15 01:37:27,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:27,661 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 100 transitions. [2022-02-15 01:37:27,661 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.077922077922078) internal successors, (83), 76 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:27,661 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 100 transitions. [2022-02-15 01:37:27,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-15 01:37:27,662 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:27,662 INFO L514 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:27,662 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:37:27,662 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:27,663 INFO L85 PathProgramCache]: Analyzing trace with hash 713507818, now seen corresponding path program 74 times [2022-02-15 01:37:27,663 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:27,663 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [362788323] [2022-02-15 01:37:27,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:27,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:27,667 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:37:27,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:27,670 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:37:27,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:30,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:30,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:30,020 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:30,020 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [362788323] [2022-02-15 01:37:30,020 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [362788323] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:30,020 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:30,020 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-15 01:37:30,020 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860862910] [2022-02-15 01:37:30,020 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:30,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-15 01:37:30,021 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:30,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-15 01:37:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5779, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:37:30,022 INFO L87 Difference]: Start difference. First operand 98 states and 100 transitions. Second operand has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:56,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:37:56,956 INFO L93 Difference]: Finished difference Result 566 states and 795 transitions. [2022-02-15 01:37:56,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-15 01:37:56,956 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-15 01:37:56,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:37:56,958 INFO L225 Difference]: With dead ends: 566 [2022-02-15 01:37:56,958 INFO L226 Difference]: Without dead ends: 549 [2022-02-15 01:37:56,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2776 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=675, Invalid=22581, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:37:56,959 INFO L933 BasicCegarLoop]: 235 mSDtfsCounter, 638 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 44004 mSolverCounterSat, 538 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 639 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 44542 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 538 IncrementalHoareTripleChecker+Valid, 44004 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:37:56,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [639 Valid, 582 Invalid, 44542 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [538 Valid, 44004 Invalid, 0 Unknown, 0 Unchecked, 13.1s Time] [2022-02-15 01:37:56,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 549 states. [2022-02-15 01:37:57,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 549 to 99. [2022-02-15 01:37:57,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 91 states have (on average 1.032967032967033) internal successors, (94), 92 states have internal predecessors, (94), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:37:57,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 101 transitions. [2022-02-15 01:37:57,124 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 101 transitions. Word has length 88 [2022-02-15 01:37:57,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:37:57,124 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 101 transitions. [2022-02-15 01:37:57,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0769230769230769) internal successors, (84), 77 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:37:57,124 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 101 transitions. [2022-02-15 01:37:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:37:57,125 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:37:57,125 INFO L514 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:37:57,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:37:57,125 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:37:57,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:37:57,125 INFO L85 PathProgramCache]: Analyzing trace with hash 779185970, now seen corresponding path program 75 times [2022-02-15 01:37:57,125 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:37:57,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1321620345] [2022-02-15 01:37:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:37:57,126 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:37:57,126 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:37:57,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:37:57,130 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:37:57,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:59,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:37:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:37:59,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:37:59,472 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:37:59,472 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1321620345] [2022-02-15 01:37:59,472 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1321620345] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:37:59,472 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:37:59,472 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-15 01:37:59,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007450848] [2022-02-15 01:37:59,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:37:59,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-15 01:37:59,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:37:59,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-15 01:37:59,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=5932, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:37:59,473 INFO L87 Difference]: Start difference. First operand 99 states and 101 transitions. Second operand has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:27,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:27,724 INFO L93 Difference]: Finished difference Result 573 states and 805 transitions. [2022-02-15 01:38:27,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 01:38:27,725 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:38:27,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:27,727 INFO L225 Difference]: With dead ends: 573 [2022-02-15 01:38:27,727 INFO L226 Difference]: Without dead ends: 556 [2022-02-15 01:38:27,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2851 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=684, Invalid=23186, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 01:38:27,728 INFO L933 BasicCegarLoop]: 238 mSDtfsCounter, 734 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 43395 mSolverCounterSat, 589 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 480 SdHoareTripleChecker+Invalid, 43984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 589 IncrementalHoareTripleChecker+Valid, 43395 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:27,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 480 Invalid, 43984 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [589 Valid, 43395 Invalid, 0 Unknown, 0 Unchecked, 13.3s Time] [2022-02-15 01:38:27,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 556 states. [2022-02-15 01:38:27,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 556 to 100. [2022-02-15 01:38:27,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 93 states have internal predecessors, (95), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:38:27,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2022-02-15 01:38:27,896 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 89 [2022-02-15 01:38:27,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:27,896 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2022-02-15 01:38:27,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0759493670886076) internal successors, (85), 78 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:38:27,896 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2022-02-15 01:38:27,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-02-15 01:38:27,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:27,896 INFO L514 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:27,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:38:27,897 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:27,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1479758614, now seen corresponding path program 76 times [2022-02-15 01:38:27,897 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:27,897 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [8425143] [2022-02-15 01:38:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:27,898 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:27,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:38:27,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:27,901 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:38:28,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:30,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:30,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:30,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:30,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:30,414 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [8425143] [2022-02-15 01:38:30,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [8425143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:30,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:30,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:38:30,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052636022] [2022-02-15 01:38:30,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:30,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:38:30,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:30,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:38:30,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6087, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:38:30,416 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 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) [2022-02-15 01:38:57,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:38:57,624 INFO L93 Difference]: Finished difference Result 580 states and 815 transitions. [2022-02-15 01:38:57,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-02-15 01:38:57,624 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 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 90 [2022-02-15 01:38:57,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:38:57,626 INFO L225 Difference]: With dead ends: 580 [2022-02-15 01:38:57,626 INFO L226 Difference]: Without dead ends: 563 [2022-02-15 01:38:57,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2927 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=693, Invalid=23799, Unknown=0, NotChecked=0, Total=24492 [2022-02-15 01:38:57,627 INFO L933 BasicCegarLoop]: 241 mSDtfsCounter, 902 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 41264 mSolverCounterSat, 676 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 903 SdHoareTripleChecker+Valid, 288 SdHoareTripleChecker+Invalid, 41940 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 676 IncrementalHoareTripleChecker+Valid, 41264 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:38:57,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [903 Valid, 288 Invalid, 41940 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [676 Valid, 41264 Invalid, 0 Unknown, 0 Unchecked, 12.3s Time] [2022-02-15 01:38:57,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-02-15 01:38:57,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 101. [2022-02-15 01:38:57,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 93 states have (on average 1.032258064516129) internal successors, (96), 94 states have internal predecessors, (96), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:38:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 103 transitions. [2022-02-15 01:38:57,799 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 103 transitions. Word has length 90 [2022-02-15 01:38:57,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:38:57,799 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 103 transitions. [2022-02-15 01:38:57,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.075) internal successors, (86), 79 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) [2022-02-15 01:38:57,799 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 103 transitions. [2022-02-15 01:38:57,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 01:38:57,799 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:38:57,800 INFO L514 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:38:57,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:38:57,800 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:38:57,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:38:57,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1507403314, now seen corresponding path program 77 times [2022-02-15 01:38:57,800 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:38:57,800 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659212027] [2022-02-15 01:38:57,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:38:57,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:38:57,801 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:38:57,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:38:57,805 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:38:57,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:59,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:38:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:38:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:38:59,665 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:38:59,665 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659212027] [2022-02-15 01:38:59,665 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [659212027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:38:59,665 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:38:59,665 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-15 01:38:59,665 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284607942] [2022-02-15 01:38:59,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:38:59,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-15 01:38:59,666 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:38:59,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-15 01:38:59,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6244, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:38:59,667 INFO L87 Difference]: Start difference. First operand 101 states and 103 transitions. Second operand has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 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) [2022-02-15 01:39:28,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:28,152 INFO L93 Difference]: Finished difference Result 587 states and 825 transitions. [2022-02-15 01:39:28,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:39:28,152 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 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 91 [2022-02-15 01:39:28,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:28,154 INFO L225 Difference]: With dead ends: 587 [2022-02-15 01:39:28,154 INFO L226 Difference]: Without dead ends: 570 [2022-02-15 01:39:28,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3004 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=702, Invalid=24420, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:39:28,155 INFO L933 BasicCegarLoop]: 244 mSDtfsCounter, 734 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 46125 mSolverCounterSat, 595 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 735 SdHoareTripleChecker+Valid, 516 SdHoareTripleChecker+Invalid, 46720 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 595 IncrementalHoareTripleChecker+Valid, 46125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:28,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [735 Valid, 516 Invalid, 46720 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [595 Valid, 46125 Invalid, 0 Unknown, 0 Unchecked, 13.7s Time] [2022-02-15 01:39:28,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 570 states. [2022-02-15 01:39:28,321 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 570 to 102. [2022-02-15 01:39:28,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 94 states have (on average 1.0319148936170213) internal successors, (97), 95 states have internal predecessors, (97), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:39:28,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2022-02-15 01:39:28,322 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 91 [2022-02-15 01:39:28,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:28,322 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2022-02-15 01:39:28,322 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0740740740740742) internal successors, (87), 80 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) [2022-02-15 01:39:28,322 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2022-02-15 01:39:28,322 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:39:28,322 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:28,323 INFO L514 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:28,323 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:39:28,323 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:28,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:28,323 INFO L85 PathProgramCache]: Analyzing trace with hash -379857430, now seen corresponding path program 78 times [2022-02-15 01:39:28,323 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:28,323 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [218682432] [2022-02-15 01:39:28,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:28,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:28,324 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:39:28,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:28,328 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:30,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:30,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:30,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:30,928 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:30,928 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [218682432] [2022-02-15 01:39:30,928 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [218682432] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:30,928 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:30,928 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 01:39:30,928 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937110801] [2022-02-15 01:39:30,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:30,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 01:39:30,928 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:30,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 01:39:30,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=239, Invalid=6403, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 01:39:30,929 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:00,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:00,511 INFO L93 Difference]: Finished difference Result 594 states and 835 transitions. [2022-02-15 01:40:00,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-02-15 01:40:00,512 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:40:00,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:00,514 INFO L225 Difference]: With dead ends: 594 [2022-02-15 01:40:00,514 INFO L226 Difference]: Without dead ends: 577 [2022-02-15 01:40:00,515 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3082 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=711, Invalid=25049, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 01:40:00,515 INFO L933 BasicCegarLoop]: 247 mSDtfsCounter, 770 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 46755 mSolverCounterSat, 616 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 771 SdHoareTripleChecker+Valid, 489 SdHoareTripleChecker+Invalid, 47371 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 616 IncrementalHoareTripleChecker+Valid, 46755 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:00,515 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [771 Valid, 489 Invalid, 47371 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [616 Valid, 46755 Invalid, 0 Unknown, 0 Unchecked, 14.1s Time] [2022-02-15 01:40:00,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2022-02-15 01:40:00,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 103. [2022-02-15 01:40:00,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 96 states have internal predecessors, (98), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:40:00,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 105 transitions. [2022-02-15 01:40:00,702 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 105 transitions. Word has length 92 [2022-02-15 01:40:00,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:00,702 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 105 transitions. [2022-02-15 01:40:00,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.0731707317073171) internal successors, (88), 81 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:00,702 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 105 transitions. [2022-02-15 01:40:00,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-15 01:40:00,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:00,702 INFO L514 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:00,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:40:00,703 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:00,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:00,703 INFO L85 PathProgramCache]: Analyzing trace with hash 1244601650, now seen corresponding path program 79 times [2022-02-15 01:40:00,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:00,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [526637261] [2022-02-15 01:40:00,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:00,709 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:00,709 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:40:00,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:00,712 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:00,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:03,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:03,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:03,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:03,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:03,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [526637261] [2022-02-15 01:40:03,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [526637261] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:03,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:03,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-15 01:40:03,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110027432] [2022-02-15 01:40:03,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:03,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-15 01:40:03,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:03,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-15 01:40:03,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=242, Invalid=6564, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:40:03,270 INFO L87 Difference]: Start difference. First operand 103 states and 105 transitions. Second operand has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:33,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:33,132 INFO L93 Difference]: Finished difference Result 601 states and 845 transitions. [2022-02-15 01:40:33,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 01:40:33,133 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-15 01:40:33,133 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:33,135 INFO L225 Difference]: With dead ends: 601 [2022-02-15 01:40:33,135 INFO L226 Difference]: Without dead ends: 584 [2022-02-15 01:40:33,136 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3161 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=720, Invalid=25686, Unknown=0, NotChecked=0, Total=26406 [2022-02-15 01:40:33,136 INFO L933 BasicCegarLoop]: 250 mSDtfsCounter, 786 mSDsluCounter, 237 mSDsCounter, 0 mSdLazyCounter, 47817 mSolverCounterSat, 627 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 787 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 48444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 627 IncrementalHoareTripleChecker+Valid, 47817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 13.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:33,136 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [787 Valid, 487 Invalid, 48444 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [627 Valid, 47817 Invalid, 0 Unknown, 0 Unchecked, 13.9s Time] [2022-02-15 01:40:33,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 584 states. [2022-02-15 01:40:33,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 584 to 104. [2022-02-15 01:40:33,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 96 states have (on average 1.03125) internal successors, (99), 97 states have internal predecessors, (99), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:40:33,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 106 transitions. [2022-02-15 01:40:33,327 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 106 transitions. Word has length 93 [2022-02-15 01:40:33,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:33,327 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 106 transitions. [2022-02-15 01:40:33,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.072289156626506) internal successors, (89), 82 states have internal predecessors, (89), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:33,327 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 106 transitions. [2022-02-15 01:40:33,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-15 01:40:33,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:33,327 INFO L514 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:33,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:40:33,328 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:33,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:33,328 INFO L85 PathProgramCache]: Analyzing trace with hash 63225578, now seen corresponding path program 80 times [2022-02-15 01:40:33,329 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:33,329 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1313127519] [2022-02-15 01:40:33,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:33,329 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:33,330 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:40:33,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:33,334 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:33,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:35,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:35,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:35,994 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:35,994 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1313127519] [2022-02-15 01:40:35,994 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1313127519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:35,994 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:35,995 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-15 01:40:35,995 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351495273] [2022-02-15 01:40:35,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:35,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-15 01:40:35,995 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:35,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-15 01:40:35,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=6727, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:40:35,996 INFO L87 Difference]: Start difference. First operand 104 states and 106 transitions. Second operand has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:07,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:41:07,191 INFO L93 Difference]: Finished difference Result 608 states and 855 transitions. [2022-02-15 01:41:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-15 01:41:07,191 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 94 [2022-02-15 01:41:07,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:41:07,193 INFO L225 Difference]: With dead ends: 608 [2022-02-15 01:41:07,193 INFO L226 Difference]: Without dead ends: 591 [2022-02-15 01:41:07,194 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3241 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=729, Invalid=26331, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 01:41:07,195 INFO L933 BasicCegarLoop]: 253 mSDtfsCounter, 690 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 51327 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 11.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 691 SdHoareTripleChecker+Valid, 625 SdHoareTripleChecker+Invalid, 51909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 51327 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 14.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:41:07,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [691 Valid, 625 Invalid, 51909 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [582 Valid, 51327 Invalid, 0 Unknown, 0 Unchecked, 14.0s Time] [2022-02-15 01:41:07,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 591 states. [2022-02-15 01:41:07,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 591 to 105. [2022-02-15 01:41:07,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 97 states have (on average 1.0309278350515463) internal successors, (100), 98 states have internal predecessors, (100), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:41:07,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 107 transitions. [2022-02-15 01:41:07,381 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 107 transitions. Word has length 94 [2022-02-15 01:41:07,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:41:07,381 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 107 transitions. [2022-02-15 01:41:07,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0714285714285714) internal successors, (90), 83 states have internal predecessors, (90), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:41:07,381 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 107 transitions. [2022-02-15 01:41:07,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:41:07,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:41:07,382 INFO L514 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:41:07,382 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:41:07,382 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:41:07,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:41:07,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2095273010, now seen corresponding path program 81 times [2022-02-15 01:41:07,382 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:41:07,382 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [944378972] [2022-02-15 01:41:07,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:41:07,383 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 0 HavocedVariables, 3 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:41:07,383 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-15 01:41:07,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:41:07,387 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:41:07,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:10,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:41:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:41:10,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:41:10,146 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:41:10,146 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [944378972] [2022-02-15 01:41:10,146 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [944378972] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:41:10,146 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:41:10,146 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-15 01:41:10,146 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572831308] [2022-02-15 01:41:10,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:41:10,147 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-15 01:41:10,147 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:41:10,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-15 01:41:10,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=6892, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:41:10,148 INFO L87 Difference]: Start difference. First operand 105 states and 107 transitions. Second operand has 85 states, 85 states have (on average 1.0705882352941176) internal successors, (91), 84 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)