/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/acceleratedInterpolationQvasr_64.epf -i ../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:46:30,966 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:46:30,987 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:46:31,023 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:46:31,059 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:46:31,059 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:46:31,060 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:46:31,062 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationQvasr_64.epf [2022-02-24 03:46:31,071 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:46:31,071 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:46:31,073 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:46:31,073 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:46:31,074 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:46:31,074 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:46:31,074 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:46:31,074 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:46:31,074 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:46:31,074 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:46:31,074 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:46:31,074 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:46:31,075 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:46:31,075 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:46:31,075 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:46:31,242 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:46:31,261 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:46:31,263 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:46:31,264 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:46:31,266 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:46:31,267 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-02-24 03:46:31,309 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756eddf2b/3afa143b6c194e82bee82e17ad85e5b8/FLAGad00fb8a2 [2022-02-24 03:46:31,647 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:46:31,647 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c [2022-02-24 03:46:31,651 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756eddf2b/3afa143b6c194e82bee82e17ad85e5b8/FLAGad00fb8a2 [2022-02-24 03:46:31,661 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/756eddf2b/3afa143b6c194e82bee82e17ad85e5b8 [2022-02-24 03:46:31,663 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:46:31,665 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:46:31,668 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:46:31,668 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:46:31,670 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:46:31,671 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,671 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3b43ec7d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31, skipping insertion in model container [2022-02-24 03:46:31,672 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,676 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:46:31,685 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:46:31,831 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-02-24 03:46:31,842 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:46:31,849 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:46:31,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_7.c[318,331] [2022-02-24 03:46:31,860 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:46:31,868 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:46:31,869 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31 WrapperNode [2022-02-24 03:46:31,869 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:46:31,870 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:46:31,870 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:46:31,870 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:46:31,877 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,877 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,883 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,884 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,887 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,890 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,894 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,898 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:46:31,899 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:46:31,899 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:46:31,900 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:46:31,901 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (1/1) ... [2022-02-24 03:46:31,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:46:31,913 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:46:31,924 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) [2022-02-24 03:46:31,944 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 [2022-02-24 03:46:31,957 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:46:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:46:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:46:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:46:31,958 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:46:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:46:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:46:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:46:31,958 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:46:31,959 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:46:31,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:46:32,005 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:46:32,007 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:46:32,132 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:46:32,137 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:46:32,137 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:46:32,139 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:46:32 BoogieIcfgContainer [2022-02-24 03:46:32,139 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:46:32,140 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:46:32,140 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:46:32,142 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:46:32,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:46:31" (1/3) ... [2022-02-24 03:46:32,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c875ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:46:32, skipping insertion in model container [2022-02-24 03:46:32,143 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:46:31" (2/3) ... [2022-02-24 03:46:32,143 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35c875ce and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:46:32, skipping insertion in model container [2022-02-24 03:46:32,144 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:46:32" (3/3) ... [2022-02-24 03:46:32,144 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_7.c [2022-02-24 03:46:32,148 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:46:32,148 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:46:32,185 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:46:32,191 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=QVASR [2022-02-24 03:46:32,197 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:46:32,218 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 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) [2022-02-24 03:46:32,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:46:32,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:32,223 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:32,223 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:32,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:32,226 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-24 03:46:32,231 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:32,232 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1669599982] [2022-02-24 03:46:32,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:32,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:32,268 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:46:32,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:32,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:32,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:32,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:32,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:32,354 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1669599982] [2022-02-24 03:46:32,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1669599982] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:32,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:32,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:46:32,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841350169] [2022-02-24 03:46:32,357 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:32,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:46:32,359 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:32,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:46:32,375 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:46:32,376 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.5384615384615385) internal successors, (20), 14 states have internal predecessors, (20), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:32,398 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-24 03:46:32,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:46:32,400 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 03:46:32,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:32,403 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:46:32,403 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 03:46:32,405 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:46:32,407 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 14 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 25 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:32,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 25 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:46:32,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 03:46:32,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 03:46:32,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 9 states have internal predecessors, (12), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-24 03:46:32,439 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-24 03:46:32,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:32,439 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-24 03:46:32,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 2 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,440 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-24 03:46:32,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:46:32,440 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:32,440 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:32,441 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:46:32,441 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:32,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:32,443 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-24 03:46:32,443 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:32,443 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311808467] [2022-02-24 03:46:32,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:32,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:32,450 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:46:32,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:32,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:32,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:32,531 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:32,531 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311808467] [2022-02-24 03:46:32,531 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [311808467] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:32,532 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:32,532 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:46:32,532 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222550722] [2022-02-24 03:46:32,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:32,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:46:32,533 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:32,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:46:32,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:46:32,535 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:32,573 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-24 03:46:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:46:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 12 [2022-02-24 03:46:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:32,574 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:46:32,574 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:46:32,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:46:32,579 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 12 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:32,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 21 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:46:32,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:46:32,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 03:46:32,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.2727272727272727) internal successors, (14), 11 states have internal predecessors, (14), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-24 03:46:32,585 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-24 03:46:32,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:32,585 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-24 03:46:32,585 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 3 states have internal predecessors, (8), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,586 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-24 03:46:32,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:46:32,586 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:32,586 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:32,586 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:46:32,586 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:32,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:32,587 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-24 03:46:32,587 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:32,587 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [800445517] [2022-02-24 03:46:32,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:32,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:32,671 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:46:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:32,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:32,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:32,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:32,746 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:32,746 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [800445517] [2022-02-24 03:46:32,746 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [800445517] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:32,747 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:32,747 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:46:32,747 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601804846] [2022-02-24 03:46:32,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:32,748 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:46:32,748 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:32,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:46:32,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:46:32,749 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-02-24 03:46:32,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:32,815 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-24 03:46:32,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:46:32,816 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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 [2022-02-24 03:46:32,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:32,816 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:46:32,817 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:46:32,817 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:46:32,822 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:32,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 19 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:46:32,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:46:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:46:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:32,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-24 03:46:32,832 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-24 03:46:32,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:32,832 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-24 03:46:32,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 5 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) [2022-02-24 03:46:32,832 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-24 03:46:32,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:46:32,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:32,833 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:32,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:46:32,833 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:32,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:32,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-24 03:46:32,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:32,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1954031981] [2022-02-24 03:46:32,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:32,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:34,018 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,415 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:34,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:34,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:34,453 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:34,535 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:34,536 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1954031981] [2022-02-24 03:46:34,536 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1954031981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:34,536 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:34,536 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:46:34,536 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53554297] [2022-02-24 03:46:34,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:34,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:46:34,537 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:34,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:46:34,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:46:34,537 INFO L87 Difference]: Start difference. First operand 20 states and 23 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) [2022-02-24 03:46:34,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:34,638 INFO L93 Difference]: Finished difference Result 37 states and 48 transitions. [2022-02-24 03:46:34,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:46:34,639 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 [2022-02-24 03:46:34,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:34,640 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:46:34,641 INFO L226 Difference]: Without dead ends: 25 [2022-02-24 03:46:34,641 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=75, Invalid=135, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:46:34,646 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:34,647 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 24 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:46:34,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-24 03:46:34,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-24 03:46:34,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:34,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 28 transitions. [2022-02-24 03:46:34,653 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 28 transitions. Word has length 19 [2022-02-24 03:46:34,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:34,653 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 28 transitions. [2022-02-24 03:46:34,653 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) [2022-02-24 03:46:34,653 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 28 transitions. [2022-02-24 03:46:34,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-02-24 03:46:34,654 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:34,654 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:34,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:46:34,654 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:34,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:34,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1246825262, now seen corresponding path program 2 times [2022-02-24 03:46:34,655 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:34,655 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [557785365] [2022-02-24 03:46:34,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:34,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:34,814 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,985 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:34,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:35,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:35,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:35,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:35,108 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:35,109 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [557785365] [2022-02-24 03:46:35,109 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [557785365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:35,109 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:35,109 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:46:35,109 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030426476] [2022-02-24 03:46:35,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:35,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:46:35,109 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:35,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:46:35,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:46:35,110 INFO L87 Difference]: Start difference. First operand 25 states and 28 transitions. Second operand has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2022-02-24 03:46:35,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:35,253 INFO L93 Difference]: Finished difference Result 47 states and 58 transitions. [2022-02-24 03:46:35,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:46:35,253 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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 [2022-02-24 03:46:35,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:35,254 INFO L225 Difference]: With dead ends: 47 [2022-02-24 03:46:35,254 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:46:35,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:46:35,255 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:35,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 19 Invalid, 116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:35,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:46:35,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:46:35,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.16) internal successors, (29), 25 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:35,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2022-02-24 03:46:35,259 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 24 [2022-02-24 03:46:35,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:35,259 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2022-02-24 03:46:35,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.6666666666666667) internal successors, (20), 11 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) [2022-02-24 03:46:35,259 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2022-02-24 03:46:35,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:46:35,260 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:35,260 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:35,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:46:35,260 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:35,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:35,261 INFO L85 PathProgramCache]: Analyzing trace with hash -319242389, now seen corresponding path program 3 times [2022-02-24 03:46:35,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:35,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [712614706] [2022-02-24 03:46:35,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:35,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:35,408 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:35,569 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:35,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:35,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:35,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:35,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:35,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:35,704 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [712614706] [2022-02-24 03:46:35,704 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [712614706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:35,704 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:35,704 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:46:35,704 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966118737] [2022-02-24 03:46:35,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:35,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:46:35,704 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:35,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:46:35,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:46:35,705 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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) [2022-02-24 03:46:35,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:35,922 INFO L93 Difference]: Finished difference Result 57 states and 68 transitions. [2022-02-24 03:46:35,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:46:35,923 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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 [2022-02-24 03:46:35,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:35,924 INFO L225 Difference]: With dead ends: 57 [2022-02-24 03:46:35,924 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:46:35,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=210, Invalid=492, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:46:35,925 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 185 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:35,925 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 185 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:35,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:46:35,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2022-02-24 03:46:35,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:35,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 38 transitions. [2022-02-24 03:46:35,929 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 38 transitions. Word has length 29 [2022-02-24 03:46:35,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:35,929 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 38 transitions. [2022-02-24 03:46:35,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.6666666666666667) internal successors, (25), 14 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) [2022-02-24 03:46:35,929 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 38 transitions. [2022-02-24 03:46:35,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 03:46:35,930 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:35,930 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:35,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:46:35,930 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:35,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:35,930 INFO L85 PathProgramCache]: Analyzing trace with hash 951830946, now seen corresponding path program 4 times [2022-02-24 03:46:35,931 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:35,931 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1316208976] [2022-02-24 03:46:35,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:35,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:36,098 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:36,259 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:36,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:36,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:36,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:36,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:36,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1316208976] [2022-02-24 03:46:36,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1316208976] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:36,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:36,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:46:36,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095228450] [2022-02-24 03:46:36,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:36,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:46:36,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:36,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:46:36,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:46:36,467 INFO L87 Difference]: Start difference. First operand 35 states and 38 transitions. Second operand has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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) [2022-02-24 03:46:36,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:36,738 INFO L93 Difference]: Finished difference Result 67 states and 78 transitions. [2022-02-24 03:46:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:46:36,739 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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 [2022-02-24 03:46:36,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:36,741 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:46:36,741 INFO L226 Difference]: Without dead ends: 40 [2022-02-24 03:46:36,741 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=300, Invalid=756, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:46:36,742 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 207 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 256 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 207 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:36,742 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 29 Invalid, 256 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 207 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:36,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-24 03:46:36,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-24 03:46:36,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:36,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 43 transitions. [2022-02-24 03:46:36,746 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 43 transitions. Word has length 34 [2022-02-24 03:46:36,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:36,746 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 43 transitions. [2022-02-24 03:46:36,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 17 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) [2022-02-24 03:46:36,747 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 43 transitions. [2022-02-24 03:46:36,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:46:36,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:36,747 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:36,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:46:36,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:36,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:36,748 INFO L85 PathProgramCache]: Analyzing trace with hash 601551863, now seen corresponding path program 5 times [2022-02-24 03:46:36,748 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:36,748 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538532020] [2022-02-24 03:46:36,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:36,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:36,870 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:37,010 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:37,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:37,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:37,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:37,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:37,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:37,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538532020] [2022-02-24 03:46:37,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [538532020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:37,206 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:37,206 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:46:37,206 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814904079] [2022-02-24 03:46:37,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:37,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:46:37,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:37,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:46:37,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:46:37,207 INFO L87 Difference]: Start difference. First operand 40 states and 43 transitions. Second operand has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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) [2022-02-24 03:46:37,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:37,539 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2022-02-24 03:46:37,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:46:37,541 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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 [2022-02-24 03:46:37,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:37,542 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:46:37,542 INFO L226 Difference]: Without dead ends: 45 [2022-02-24 03:46:37,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=405, Invalid=1077, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:46:37,543 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 375 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:37,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 49 Invalid, 375 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:46:37,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2022-02-24 03:46:37,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2022-02-24 03:46:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:37,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-02-24 03:46:37,548 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 39 [2022-02-24 03:46:37,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:37,548 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-02-24 03:46:37,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.6666666666666667) internal successors, (35), 20 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) [2022-02-24 03:46:37,548 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-02-24 03:46:37,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:46:37,549 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:37,549 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:37,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:46:37,549 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:37,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:37,549 INFO L85 PathProgramCache]: Analyzing trace with hash -2144480746, now seen corresponding path program 6 times [2022-02-24 03:46:37,550 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:37,550 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209527366] [2022-02-24 03:46:37,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:37,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:37,677 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:37,840 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:37,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:37,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:37,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:37,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:38,091 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:38,091 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209527366] [2022-02-24 03:46:38,091 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209527366] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:38,091 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:38,091 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:46:38,091 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132875185] [2022-02-24 03:46:38,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:38,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:46:38,092 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:46:38,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:46:38,093 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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) [2022-02-24 03:46:38,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:38,467 INFO L93 Difference]: Finished difference Result 87 states and 98 transitions. [2022-02-24 03:46:38,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:46:38,468 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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 [2022-02-24 03:46:38,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:38,468 INFO L225 Difference]: With dead ends: 87 [2022-02-24 03:46:38,468 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:46:38,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=525, Invalid=1455, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:46:38,469 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 386 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 435 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 386 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:38,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 24 Invalid, 435 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 386 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:46:38,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:46:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2022-02-24 03:46:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 53 transitions. [2022-02-24 03:46:38,474 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 53 transitions. Word has length 44 [2022-02-24 03:46:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:38,474 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 53 transitions. [2022-02-24 03:46:38,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 23 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) [2022-02-24 03:46:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 53 transitions. [2022-02-24 03:46:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-24 03:46:38,475 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:38,475 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:46:38,475 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 266043011, now seen corresponding path program 7 times [2022-02-24 03:46:38,476 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:38,476 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [786203701] [2022-02-24 03:46:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:38,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:38,583 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:38,684 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:38,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:38,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:38,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:38,982 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:38,982 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [786203701] [2022-02-24 03:46:38,982 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [786203701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:38,982 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:38,982 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:46:38,982 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063071610] [2022-02-24 03:46:38,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:38,983 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:46:38,983 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:38,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:46:38,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:46:38,983 INFO L87 Difference]: Start difference. First operand 50 states and 53 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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) [2022-02-24 03:46:39,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:39,449 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2022-02-24 03:46:39,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:46:39,450 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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 [2022-02-24 03:46:39,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:39,451 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:46:39,451 INFO L226 Difference]: Without dead ends: 55 [2022-02-24 03:46:39,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 655 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=660, Invalid=1890, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:46:39,452 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 520 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 572 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:39,452 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 39 Invalid, 572 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 520 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:46:39,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2022-02-24 03:46:39,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2022-02-24 03:46:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:39,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2022-02-24 03:46:39,456 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 49 [2022-02-24 03:46:39,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:39,457 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2022-02-24 03:46:39,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 26 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) [2022-02-24 03:46:39,457 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2022-02-24 03:46:39,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 03:46:39,457 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:39,457 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:39,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:46:39,458 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:39,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:39,458 INFO L85 PathProgramCache]: Analyzing trace with hash 2144068746, now seen corresponding path program 8 times [2022-02-24 03:46:39,458 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:39,458 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [755164310] [2022-02-24 03:46:39,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:39,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:39,598 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:39,730 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:39,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:39,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:39,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:39,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:40,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:40,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [755164310] [2022-02-24 03:46:40,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [755164310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:40,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:40,068 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:46:40,068 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582831102] [2022-02-24 03:46:40,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:40,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:46:40,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:40,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:46:40,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:46:40,070 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2022-02-24 03:46:40,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:40,671 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-02-24 03:46:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:46:40,672 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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 [2022-02-24 03:46:40,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:40,672 INFO L225 Difference]: With dead ends: 107 [2022-02-24 03:46:40,672 INFO L226 Difference]: Without dead ends: 60 [2022-02-24 03:46:40,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 824 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=810, Invalid=2382, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:46:40,674 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 107 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 654 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 793 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 654 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:40,674 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 24 Invalid, 793 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 654 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:46:40,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-24 03:46:40,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2022-02-24 03:46:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 states have internal predecessors, (59), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 63 transitions. [2022-02-24 03:46:40,679 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 63 transitions. Word has length 54 [2022-02-24 03:46:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:40,679 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 63 transitions. [2022-02-24 03:46:40,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.6666666666666667) internal successors, (50), 29 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) [2022-02-24 03:46:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 63 transitions. [2022-02-24 03:46:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:46:40,679 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:40,679 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:40,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:46:40,680 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:40,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:40,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1636458737, now seen corresponding path program 9 times [2022-02-24 03:46:40,680 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:40,680 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1568912781] [2022-02-24 03:46:40,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:40,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:40,844 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:40,986 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:40,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:41,060 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:41,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:41,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:41,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:41,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1568912781] [2022-02-24 03:46:41,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1568912781] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:41,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:41,351 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:46:41,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106212145] [2022-02-24 03:46:41,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:41,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:46:41,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:41,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:46:41,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=729, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:46:41,353 INFO L87 Difference]: Start difference. First operand 60 states and 63 transitions. Second operand has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 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) [2022-02-24 03:46:42,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:42,068 INFO L93 Difference]: Finished difference Result 117 states and 128 transitions. [2022-02-24 03:46:42,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:46:42,072 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 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 [2022-02-24 03:46:42,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:42,073 INFO L225 Difference]: With dead ends: 117 [2022-02-24 03:46:42,073 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:46:42,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1021 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=975, Invalid=2931, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:46:42,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 94 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 808 mSolverCounterSat, 108 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 108 IncrementalHoareTripleChecker+Valid, 808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:42,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 29 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [108 Valid, 808 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:46:42,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:46:42,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2022-02-24 03:46:42,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:42,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 68 transitions. [2022-02-24 03:46:42,079 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 68 transitions. Word has length 59 [2022-02-24 03:46:42,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:42,079 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 68 transitions. [2022-02-24 03:46:42,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.6666666666666667) internal successors, (55), 32 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) [2022-02-24 03:46:42,079 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 68 transitions. [2022-02-24 03:46:42,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-02-24 03:46:42,080 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:42,080 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:42,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:46:42,080 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:42,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:42,080 INFO L85 PathProgramCache]: Analyzing trace with hash 1450885374, now seen corresponding path program 10 times [2022-02-24 03:46:42,080 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:42,081 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1693306673] [2022-02-24 03:46:42,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:42,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:42,183 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:42,333 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:42,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:42,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:42,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:42,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:42,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:42,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1693306673] [2022-02-24 03:46:42,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1693306673] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:42,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:42,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:46:42,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1488224034] [2022-02-24 03:46:42,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:42,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:46:42,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:42,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:46:42,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=387, Invalid=873, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:46:42,775 INFO L87 Difference]: Start difference. First operand 65 states and 68 transitions. Second operand has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 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) [2022-02-24 03:46:43,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:43,570 INFO L93 Difference]: Finished difference Result 127 states and 138 transitions. [2022-02-24 03:46:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:46:43,571 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 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 [2022-02-24 03:46:43,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:43,571 INFO L225 Difference]: With dead ends: 127 [2022-02-24 03:46:43,571 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:46:43,573 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1239 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1155, Invalid=3537, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:46:43,573 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 101 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 962 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:43,573 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 24 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 962 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:43,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:46:43,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 03:46:43,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 states have internal predecessors, (69), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:43,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 73 transitions. [2022-02-24 03:46:43,578 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 73 transitions. Word has length 64 [2022-02-24 03:46:43,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:43,578 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 73 transitions. [2022-02-24 03:46:43,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.6666666666666667) internal successors, (60), 35 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) [2022-02-24 03:46:43,578 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 73 transitions. [2022-02-24 03:46:43,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2022-02-24 03:46:43,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:43,579 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:43,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:46:43,579 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:43,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:43,580 INFO L85 PathProgramCache]: Analyzing trace with hash -1956342373, now seen corresponding path program 11 times [2022-02-24 03:46:43,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:43,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2125652678] [2022-02-24 03:46:43,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:43,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:43,707 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:43,832 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:43,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:43,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:44,295 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:44,295 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2125652678] [2022-02-24 03:46:44,295 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2125652678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:44,295 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:44,295 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:46:44,295 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915127262] [2022-02-24 03:46:44,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:44,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:46:44,296 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:44,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:46:44,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=452, Invalid=1030, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:46:44,297 INFO L87 Difference]: Start difference. First operand 70 states and 73 transitions. Second operand has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:45,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:45,260 INFO L93 Difference]: Finished difference Result 137 states and 148 transitions. [2022-02-24 03:46:45,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:46:45,261 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 69 [2022-02-24 03:46:45,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:45,261 INFO L225 Difference]: With dead ends: 137 [2022-02-24 03:46:45,261 INFO L226 Difference]: Without dead ends: 75 [2022-02-24 03:46:45,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1350, Invalid=4200, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:46:45,265 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 108 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 1182 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 1306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 1182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:45,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 49 Invalid, 1306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 1182 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:46:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2022-02-24 03:46:45,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2022-02-24 03:46:45,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:45,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 78 transitions. [2022-02-24 03:46:45,270 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 78 transitions. Word has length 69 [2022-02-24 03:46:45,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:45,270 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 78 transitions. [2022-02-24 03:46:45,270 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.6666666666666667) internal successors, (65), 38 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:45,270 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 78 transitions. [2022-02-24 03:46:45,271 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:46:45,271 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:45,271 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:45,271 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:46:45,271 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:45,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:45,271 INFO L85 PathProgramCache]: Analyzing trace with hash 1189029746, now seen corresponding path program 12 times [2022-02-24 03:46:45,272 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:45,272 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1385458003] [2022-02-24 03:46:45,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:45,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:45,420 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:45,516 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:45,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:45,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:45,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:46,058 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:46,058 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1385458003] [2022-02-24 03:46:46,058 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1385458003] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:46,058 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:46,058 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-24 03:46:46,058 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091868046] [2022-02-24 03:46:46,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:46,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-24 03:46:46,059 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:46,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-24 03:46:46,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:46:46,060 INFO L87 Difference]: Start difference. First operand 75 states and 78 transitions. Second operand has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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) [2022-02-24 03:46:47,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:47,085 INFO L93 Difference]: Finished difference Result 147 states and 158 transitions. [2022-02-24 03:46:47,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-24 03:46:47,086 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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 [2022-02-24 03:46:47,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:47,086 INFO L225 Difference]: With dead ends: 147 [2022-02-24 03:46:47,086 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:46:47,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1738 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1560, Invalid=4920, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:46:47,088 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 91 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1350 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1482 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 1350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:47,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 29 Invalid, 1482 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 1350 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:46:47,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:46:47,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2022-02-24 03:46:47,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 states have internal predecessors, (79), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:47,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 83 transitions. [2022-02-24 03:46:47,093 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 83 transitions. Word has length 74 [2022-02-24 03:46:47,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:47,093 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 83 transitions. [2022-02-24 03:46:47,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.6666666666666667) internal successors, (70), 41 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) [2022-02-24 03:46:47,094 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 83 transitions. [2022-02-24 03:46:47,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 03:46:47,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:47,094 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:47,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:46:47,094 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:47,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:47,095 INFO L85 PathProgramCache]: Analyzing trace with hash -56384985, now seen corresponding path program 13 times [2022-02-24 03:46:47,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:47,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986716161] [2022-02-24 03:46:47,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:47,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:47,240 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:47,377 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:47,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:47,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:47,917 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:47,918 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986716161] [2022-02-24 03:46:47,918 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986716161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:47,918 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:47,918 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:46:47,918 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229882020] [2022-02-24 03:46:47,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:47,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:46:47,918 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:47,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:46:47,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=1383, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:46:47,919 INFO L87 Difference]: Start difference. First operand 80 states and 83 transitions. Second operand has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 44 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) [2022-02-24 03:46:49,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:49,061 INFO L93 Difference]: Finished difference Result 157 states and 168 transitions. [2022-02-24 03:46:49,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:46:49,062 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 44 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 [2022-02-24 03:46:49,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:49,062 INFO L225 Difference]: With dead ends: 157 [2022-02-24 03:46:49,062 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 03:46:49,064 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2019 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1785, Invalid=5697, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:46:49,064 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 186 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1564 mSolverCounterSat, 176 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 176 IncrementalHoareTripleChecker+Valid, 1564 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:49,065 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 29 Invalid, 1740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [176 Valid, 1564 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:46:49,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 03:46:49,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 03:46:49,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:49,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 88 transitions. [2022-02-24 03:46:49,071 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 88 transitions. Word has length 79 [2022-02-24 03:46:49,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:49,071 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 88 transitions. [2022-02-24 03:46:49,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.6666666666666667) internal successors, (75), 44 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) [2022-02-24 03:46:49,075 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 88 transitions. [2022-02-24 03:46:49,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-02-24 03:46:49,076 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:49,076 INFO L514 BasicCegarLoop]: trace histogram [29, 28, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:49,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:46:49,076 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:49,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:49,077 INFO L85 PathProgramCache]: Analyzing trace with hash 459134950, now seen corresponding path program 14 times [2022-02-24 03:46:49,077 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:49,077 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [785153793] [2022-02-24 03:46:49,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:49,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:49,227 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:49,351 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:49,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:49,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:49,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:49,474 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:49,955 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:49,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [785153793] [2022-02-24 03:46:49,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [785153793] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:49,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:49,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-24 03:46:49,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452510005] [2022-02-24 03:46:49,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:49,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-24 03:46:49,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:49,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-24 03:46:49,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=677, Invalid=1579, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:46:49,957 INFO L87 Difference]: Start difference. First operand 85 states and 88 transitions. Second operand has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 47 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) [2022-02-24 03:46:51,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:51,294 INFO L93 Difference]: Finished difference Result 167 states and 178 transitions. [2022-02-24 03:46:51,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-24 03:46:51,294 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 47 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 [2022-02-24 03:46:51,294 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:51,295 INFO L225 Difference]: With dead ends: 167 [2022-02-24 03:46:51,295 INFO L226 Difference]: Without dead ends: 90 [2022-02-24 03:46:51,297 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2321 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2025, Invalid=6531, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:46:51,297 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 165 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1845 mSolverCounterSat, 186 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2031 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 186 IncrementalHoareTripleChecker+Valid, 1845 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:51,297 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 59 Invalid, 2031 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [186 Valid, 1845 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:46:51,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-24 03:46:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2022-02-24 03:46:51,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 states have internal predecessors, (89), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 93 transitions. [2022-02-24 03:46:51,302 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 93 transitions. Word has length 84 [2022-02-24 03:46:51,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:51,302 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 93 transitions. [2022-02-24 03:46:51,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.6666666666666667) internal successors, (80), 47 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) [2022-02-24 03:46:51,302 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 93 transitions. [2022-02-24 03:46:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:46:51,303 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:51,303 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:51,303 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:46:51,303 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:51,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:51,303 INFO L85 PathProgramCache]: Analyzing trace with hash 510526643, now seen corresponding path program 15 times [2022-02-24 03:46:51,303 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:51,303 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787365264] [2022-02-24 03:46:51,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:51,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:51,453 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:51,587 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:51,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:51,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:51,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:52,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:52,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787365264] [2022-02-24 03:46:52,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787365264] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:52,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:52,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-02-24 03:46:52,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018247326] [2022-02-24 03:46:52,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:52,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-02-24 03:46:52,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:52,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-02-24 03:46:52,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=762, Invalid=1788, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:46:52,252 INFO L87 Difference]: Start difference. First operand 90 states and 93 transitions. Second operand has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 50 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) [2022-02-24 03:46:53,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:53,670 INFO L93 Difference]: Finished difference Result 177 states and 188 transitions. [2022-02-24 03:46:53,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-24 03:46:53,671 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 50 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 [2022-02-24 03:46:53,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:53,671 INFO L225 Difference]: With dead ends: 177 [2022-02-24 03:46:53,671 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:46:53,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2280, Invalid=7422, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:46:53,673 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2025 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 2025 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:53,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 34 Invalid, 2153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 2025 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:46:53,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:46:53,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2022-02-24 03:46:53,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:53,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 98 transitions. [2022-02-24 03:46:53,680 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 98 transitions. Word has length 89 [2022-02-24 03:46:53,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:53,680 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 98 transitions. [2022-02-24 03:46:53,680 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.6666666666666667) internal successors, (85), 50 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) [2022-02-24 03:46:53,680 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 98 transitions. [2022-02-24 03:46:53,681 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-02-24 03:46:53,681 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:53,681 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:53,681 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:46:53,681 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:53,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash -1977904550, now seen corresponding path program 16 times [2022-02-24 03:46:53,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:53,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1071439870] [2022-02-24 03:46:53,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:53,833 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:53,962 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:53,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:54,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:54,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:54,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:54,681 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:54,681 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1071439870] [2022-02-24 03:46:54,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1071439870] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:54,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:54,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:46:54,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742068594] [2022-02-24 03:46:54,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:54,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:46:54,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:54,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:46:54,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=852, Invalid=2010, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:46:54,683 INFO L87 Difference]: Start difference. First operand 95 states and 98 transitions. Second operand has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 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) [2022-02-24 03:46:56,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:56,316 INFO L93 Difference]: Finished difference Result 187 states and 198 transitions. [2022-02-24 03:46:56,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:46:56,316 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 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 [2022-02-24 03:46:56,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:56,317 INFO L225 Difference]: With dead ends: 187 [2022-02-24 03:46:56,317 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 03:46:56,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 40 SyntacticMatches, 1 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2550, Invalid=8370, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:46:56,318 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 151 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 2318 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 2453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 2318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:56,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 54 Invalid, 2453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 2318 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:46:56,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 03:46:56,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 03:46:56,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 states have internal predecessors, (99), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:56,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 103 transitions. [2022-02-24 03:46:56,323 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 103 transitions. Word has length 94 [2022-02-24 03:46:56,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:56,324 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 103 transitions. [2022-02-24 03:46:56,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.6666666666666667) internal successors, (90), 53 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) [2022-02-24 03:46:56,324 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 103 transitions. [2022-02-24 03:46:56,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 03:46:56,325 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:56,325 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:56,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:46:56,325 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:56,325 INFO L85 PathProgramCache]: Analyzing trace with hash -1086390977, now seen corresponding path program 17 times [2022-02-24 03:46:56,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:56,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [332593578] [2022-02-24 03:46:56,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:56,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:56,456 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:56,591 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:56,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:56,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:56,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:57,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:57,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [332593578] [2022-02-24 03:46:57,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [332593578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:57,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:57,421 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-02-24 03:46:57,421 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618231863] [2022-02-24 03:46:57,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:57,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-02-24 03:46:57,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:57,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-02-24 03:46:57,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=947, Invalid=2245, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:46:57,422 INFO L87 Difference]: Start difference. First operand 100 states and 103 transitions. Second operand has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:59,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:59,251 INFO L93 Difference]: Finished difference Result 197 states and 208 transitions. [2022-02-24 03:46:59,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-24 03:46:59,251 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-02-24 03:46:59,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:59,252 INFO L225 Difference]: With dead ends: 197 [2022-02-24 03:46:59,252 INFO L226 Difference]: Without dead ends: 105 [2022-02-24 03:46:59,252 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3353 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2835, Invalid=9375, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:46:59,253 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 196 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2644 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 2863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 2644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:59,253 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [196 Valid, 69 Invalid, 2863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 2644 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:46:59,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2022-02-24 03:46:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2022-02-24 03:46:59,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 108 transitions. [2022-02-24 03:46:59,257 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 108 transitions. Word has length 99 [2022-02-24 03:46:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:59,257 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 108 transitions. [2022-02-24 03:46:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.6666666666666667) internal successors, (95), 56 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 108 transitions. [2022-02-24 03:46:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 03:46:59,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:59,258 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:59,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:46:59,258 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -1728244018, now seen corresponding path program 18 times [2022-02-24 03:46:59,258 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:59,258 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242016724] [2022-02-24 03:46:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:59,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:59,392 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:59,519 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:59,698 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:00,426 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:00,426 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242016724] [2022-02-24 03:47:00,426 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [242016724] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:00,426 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:00,426 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-24 03:47:00,426 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775597737] [2022-02-24 03:47:00,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:00,427 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-24 03:47:00,427 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:00,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-24 03:47:00,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1047, Invalid=2493, Unknown=0, NotChecked=0, Total=3540 [2022-02-24 03:47:00,428 INFO L87 Difference]: Start difference. First operand 105 states and 108 transitions. Second operand has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:02,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:02,454 INFO L93 Difference]: Finished difference Result 207 states and 218 transitions. [2022-02-24 03:47:02,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-02-24 03:47:02,455 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-24 03:47:02,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:02,456 INFO L225 Difference]: With dead ends: 207 [2022-02-24 03:47:02,456 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 03:47:02,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3739 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3135, Invalid=10437, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:47:02,458 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 206 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2869 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 3057 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 2869 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:02,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 39 Invalid, 3057 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 2869 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:47:02,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 03:47:02,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2022-02-24 03:47:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 113 transitions. [2022-02-24 03:47:02,462 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 113 transitions. Word has length 104 [2022-02-24 03:47:02,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:02,463 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 113 transitions. [2022-02-24 03:47:02,463 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.6666666666666667) internal successors, (100), 59 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:02,463 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 113 transitions. [2022-02-24 03:47:02,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-24 03:47:02,463 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:02,463 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:02,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:47:02,464 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:02,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:02,464 INFO L85 PathProgramCache]: Analyzing trace with hash -338572341, now seen corresponding path program 19 times [2022-02-24 03:47:02,464 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:02,464 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806871292] [2022-02-24 03:47:02,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:02,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:02,608 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:02,749 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:02,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:02,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:02,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:02,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:03,757 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:03,757 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806871292] [2022-02-24 03:47:03,757 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806871292] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:03,757 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:03,758 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:47:03,758 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [940444687] [2022-02-24 03:47:03,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:03,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:47:03,758 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:03,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:47:03,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1152, Invalid=2754, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 03:47:03,759 INFO L87 Difference]: Start difference. First operand 110 states and 113 transitions. Second operand has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:06,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:06,018 INFO L93 Difference]: Finished difference Result 217 states and 228 transitions. [2022-02-24 03:47:06,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:47:06,019 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-02-24 03:47:06,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:06,020 INFO L225 Difference]: With dead ends: 217 [2022-02-24 03:47:06,020 INFO L226 Difference]: Without dead ends: 115 [2022-02-24 03:47:06,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4146 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3450, Invalid=11556, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 03:47:06,022 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 173 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3226 mSolverCounterSat, 238 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 238 IncrementalHoareTripleChecker+Valid, 3226 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:06,022 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 34 Invalid, 3464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [238 Valid, 3226 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:47:06,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2022-02-24 03:47:06,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 115. [2022-02-24 03:47:06,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.0363636363636364) internal successors, (114), 110 states have internal predecessors, (114), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 118 transitions. [2022-02-24 03:47:06,027 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 118 transitions. Word has length 109 [2022-02-24 03:47:06,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:06,027 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 118 transitions. [2022-02-24 03:47:06,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.6666666666666667) internal successors, (105), 62 states have internal predecessors, (105), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:06,027 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 118 transitions. [2022-02-24 03:47:06,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 03:47:06,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:06,028 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:06,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:47:06,028 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:06,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:06,028 INFO L85 PathProgramCache]: Analyzing trace with hash 27731266, now seen corresponding path program 20 times [2022-02-24 03:47:06,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:06,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112497272] [2022-02-24 03:47:06,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:06,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:06,185 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:06,319 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:06,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:06,537 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:06,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:07,497 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:07,498 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112497272] [2022-02-24 03:47:07,498 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112497272] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:07,498 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:07,498 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-24 03:47:07,498 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529797677] [2022-02-24 03:47:07,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:07,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-24 03:47:07,498 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:07,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-24 03:47:07,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1262, Invalid=3028, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:47:07,500 INFO L87 Difference]: Start difference. First operand 115 states and 118 transitions. Second operand has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:09,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:09,980 INFO L93 Difference]: Finished difference Result 227 states and 238 transitions. [2022-02-24 03:47:09,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-02-24 03:47:09,981 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 114 [2022-02-24 03:47:09,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:09,981 INFO L225 Difference]: With dead ends: 227 [2022-02-24 03:47:09,981 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 03:47:09,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4574 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3780, Invalid=12732, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:47:09,991 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 225 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3517 mSolverCounterSat, 294 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 225 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 294 IncrementalHoareTripleChecker+Valid, 3517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:09,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [225 Valid, 29 Invalid, 3811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [294 Valid, 3517 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:47:09,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 03:47:09,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 120. [2022-02-24 03:47:09,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 115 states have (on average 1.0347826086956522) internal successors, (119), 115 states have internal predecessors, (119), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:09,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 123 transitions. [2022-02-24 03:47:09,996 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 123 transitions. Word has length 114 [2022-02-24 03:47:09,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:09,996 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 123 transitions. [2022-02-24 03:47:09,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.6666666666666667) internal successors, (110), 65 states have internal predecessors, (110), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:09,997 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 123 transitions. [2022-02-24 03:47:09,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 03:47:09,997 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:09,997 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:09,997 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:47:09,997 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:09,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:09,998 INFO L85 PathProgramCache]: Analyzing trace with hash -1960726441, now seen corresponding path program 21 times [2022-02-24 03:47:09,998 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:09,998 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [633054119] [2022-02-24 03:47:09,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:09,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:10,139 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:10,283 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:10,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:10,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:10,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:10,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:11,400 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:11,400 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [633054119] [2022-02-24 03:47:11,400 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [633054119] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:11,400 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:11,400 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:47:11,400 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865699628] [2022-02-24 03:47:11,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:11,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:47:11,401 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:11,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:47:11,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1377, Invalid=3315, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:47:11,402 INFO L87 Difference]: Start difference. First operand 120 states and 123 transitions. Second operand has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:14,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:14,112 INFO L93 Difference]: Finished difference Result 237 states and 248 transitions. [2022-02-24 03:47:14,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:47:14,113 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-24 03:47:14,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:14,114 INFO L225 Difference]: With dead ends: 237 [2022-02-24 03:47:14,114 INFO L226 Difference]: Without dead ends: 125 [2022-02-24 03:47:14,116 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 50 SyntacticMatches, 1 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5023 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4125, Invalid=13965, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:47:14,116 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 191 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3875 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 191 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 3875 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:14,116 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [191 Valid, 39 Invalid, 4138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 3875 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:47:14,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-24 03:47:14,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2022-02-24 03:47:14,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 120 states have (on average 1.0333333333333334) internal successors, (124), 120 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:14,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 128 transitions. [2022-02-24 03:47:14,122 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 128 transitions. Word has length 119 [2022-02-24 03:47:14,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:14,122 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 128 transitions. [2022-02-24 03:47:14,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.6666666666666667) internal successors, (115), 68 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:14,122 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 128 transitions. [2022-02-24 03:47:14,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-02-24 03:47:14,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:14,123 INFO L514 BasicCegarLoop]: trace histogram [45, 44, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:14,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:47:14,123 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:14,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:14,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1786872394, now seen corresponding path program 22 times [2022-02-24 03:47:14,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:14,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1461827607] [2022-02-24 03:47:14,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:14,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:14,289 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:14,429 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:14,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:14,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:14,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:14,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:15,679 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:15,680 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1461827607] [2022-02-24 03:47:15,680 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1461827607] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:15,680 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:15,680 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-24 03:47:15,680 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142314338] [2022-02-24 03:47:15,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:15,681 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-24 03:47:15,681 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:15,681 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-24 03:47:15,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1497, Invalid=3615, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:47:15,682 INFO L87 Difference]: Start difference. First operand 125 states and 128 transitions. Second operand has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,625 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:18,625 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2022-02-24 03:47:18,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-02-24 03:47:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 124 [2022-02-24 03:47:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:18,626 INFO L225 Difference]: With dead ends: 247 [2022-02-24 03:47:18,626 INFO L226 Difference]: Without dead ends: 130 [2022-02-24 03:47:18,627 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5515 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=4485, Invalid=15255, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:47:18,628 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 293 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 4255 mSolverCounterSat, 320 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 4575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 320 IncrementalHoareTripleChecker+Valid, 4255 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:18,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 19 Invalid, 4575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [320 Valid, 4255 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:47:18,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-02-24 03:47:18,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-02-24 03:47:18,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.032) internal successors, (129), 125 states have internal predecessors, (129), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 133 transitions. [2022-02-24 03:47:18,633 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 133 transitions. Word has length 124 [2022-02-24 03:47:18,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:18,634 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 133 transitions. [2022-02-24 03:47:18,634 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.6666666666666667) internal successors, (120), 71 states have internal predecessors, (120), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:18,634 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 133 transitions. [2022-02-24 03:47:18,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 03:47:18,634 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:18,634 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:18,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:47:18,635 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:18,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:18,635 INFO L85 PathProgramCache]: Analyzing trace with hash -93721885, now seen corresponding path program 23 times [2022-02-24 03:47:18,635 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:18,635 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1260864488] [2022-02-24 03:47:18,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:18,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:18,784 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:18,898 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:18,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:19,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:19,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:19,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:20,242 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:20,242 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1260864488] [2022-02-24 03:47:20,242 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1260864488] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:20,243 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:20,243 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:47:20,243 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794289109] [2022-02-24 03:47:20,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:20,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:47:20,243 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:20,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:47:20,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1622, Invalid=3928, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:47:20,245 INFO L87 Difference]: Start difference. First operand 130 states and 133 transitions. Second operand has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:23,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:23,407 INFO L93 Difference]: Finished difference Result 257 states and 268 transitions. [2022-02-24 03:47:23,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:47:23,407 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 129 [2022-02-24 03:47:23,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:23,408 INFO L225 Difference]: With dead ends: 257 [2022-02-24 03:47:23,408 INFO L226 Difference]: Without dead ends: 135 [2022-02-24 03:47:23,410 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5984 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4860, Invalid=16602, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 03:47:23,410 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 355 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 4588 mSolverCounterSat, 287 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 4875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 287 IncrementalHoareTripleChecker+Valid, 4588 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:23,410 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [355 Valid, 49 Invalid, 4875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [287 Valid, 4588 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:47:23,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-02-24 03:47:23,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 135. [2022-02-24 03:47:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 130 states have (on average 1.0307692307692307) internal successors, (134), 130 states have internal predecessors, (134), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:23,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 138 transitions. [2022-02-24 03:47:23,416 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 138 transitions. Word has length 129 [2022-02-24 03:47:23,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:23,416 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 138 transitions. [2022-02-24 03:47:23,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.6666666666666667) internal successors, (125), 74 states have internal predecessors, (125), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:23,416 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 138 transitions. [2022-02-24 03:47:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-24 03:47:23,417 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:23,417 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:23,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:47:23,417 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:23,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:23,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1582833622, now seen corresponding path program 24 times [2022-02-24 03:47:23,417 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:23,417 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745536475] [2022-02-24 03:47:23,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:23,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:23,558 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:23,697 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:23,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:23,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:23,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:25,078 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:25,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745536475] [2022-02-24 03:47:25,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [745536475] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:25,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:25,079 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-24 03:47:25,079 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171102853] [2022-02-24 03:47:25,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:25,079 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-24 03:47:25,079 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:25,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-24 03:47:25,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1752, Invalid=4254, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:47:25,081 INFO L87 Difference]: Start difference. First operand 135 states and 138 transitions. Second operand has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:28,581 INFO L93 Difference]: Finished difference Result 267 states and 278 transitions. [2022-02-24 03:47:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-02-24 03:47:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-24 03:47:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:28,583 INFO L225 Difference]: With dead ends: 267 [2022-02-24 03:47:28,583 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 03:47:28,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 151 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6496 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=5250, Invalid=18006, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 03:47:28,586 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 5042 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 5335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 5042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:28,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 44 Invalid, 5335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 5042 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:28,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 03:47:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-24 03:47:28,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.0296296296296297) internal successors, (139), 135 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 143 transitions. [2022-02-24 03:47:28,593 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 143 transitions. Word has length 134 [2022-02-24 03:47:28,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:28,593 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 143 transitions. [2022-02-24 03:47:28,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.6666666666666667) internal successors, (130), 77 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:28,593 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 143 transitions. [2022-02-24 03:47:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-24 03:47:28,594 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:28,594 INFO L514 BasicCegarLoop]: trace histogram [51, 50, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:28,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:47:28,595 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash -1457144977, now seen corresponding path program 25 times [2022-02-24 03:47:28,595 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:28,595 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363685791] [2022-02-24 03:47:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:28,751 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:28,889 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:28,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:29,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:29,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:29,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:30,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:30,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363685791] [2022-02-24 03:47:30,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363685791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:30,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:30,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:47:30,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533871442] [2022-02-24 03:47:30,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:30,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:47:30,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:30,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:47:30,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1887, Invalid=4593, Unknown=0, NotChecked=0, Total=6480 [2022-02-24 03:47:30,374 INFO L87 Difference]: Start difference. First operand 140 states and 143 transitions. Second operand has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 80 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:33,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:33,976 INFO L93 Difference]: Finished difference Result 277 states and 288 transitions. [2022-02-24 03:47:33,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:47:33,977 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 80 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-24 03:47:33,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:33,978 INFO L225 Difference]: With dead ends: 277 [2022-02-24 03:47:33,978 INFO L226 Difference]: Without dead ends: 145 [2022-02-24 03:47:33,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7029 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5655, Invalid=19467, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 03:47:33,980 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 168 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5406 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 5603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 5406 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:33,980 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 49 Invalid, 5603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 5406 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:47:33,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-02-24 03:47:33,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 145. [2022-02-24 03:47:33,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0285714285714285) internal successors, (144), 140 states have internal predecessors, (144), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:33,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 148 transitions. [2022-02-24 03:47:33,986 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 148 transitions. Word has length 139 [2022-02-24 03:47:33,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:33,986 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 148 transitions. [2022-02-24 03:47:33,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.6666666666666667) internal successors, (135), 80 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:33,986 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 148 transitions. [2022-02-24 03:47:33,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-02-24 03:47:33,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:33,987 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:33,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:47:33,987 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:33,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:33,987 INFO L85 PathProgramCache]: Analyzing trace with hash 1393036446, now seen corresponding path program 26 times [2022-02-24 03:47:33,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:33,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2133717706] [2022-02-24 03:47:33,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:33,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:34,130 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:34,231 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:34,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:34,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:34,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:34,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:35,818 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:35,818 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2133717706] [2022-02-24 03:47:35,818 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2133717706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:35,818 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:35,818 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-24 03:47:35,818 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418122885] [2022-02-24 03:47:35,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:35,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-24 03:47:35,819 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:35,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-24 03:47:35,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2027, Invalid=4945, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:47:35,820 INFO L87 Difference]: Start difference. First operand 145 states and 148 transitions. Second operand has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 83 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:39,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:39,597 INFO L93 Difference]: Finished difference Result 287 states and 298 transitions. [2022-02-24 03:47:39,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-02-24 03:47:39,598 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 83 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 144 [2022-02-24 03:47:39,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:39,598 INFO L225 Difference]: With dead ends: 287 [2022-02-24 03:47:39,599 INFO L226 Difference]: Without dead ends: 150 [2022-02-24 03:47:39,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 163 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7583 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6075, Invalid=20985, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 03:47:39,600 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 285 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5797 mSolverCounterSat, 262 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6059 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 262 IncrementalHoareTripleChecker+Valid, 5797 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:39,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 39 Invalid, 6059 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [262 Valid, 5797 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-24 03:47:39,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-24 03:47:39,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 150. [2022-02-24 03:47:39,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 145 states have (on average 1.0275862068965518) internal successors, (149), 145 states have internal predecessors, (149), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:39,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 153 transitions. [2022-02-24 03:47:39,606 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 153 transitions. Word has length 144 [2022-02-24 03:47:39,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:39,606 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 153 transitions. [2022-02-24 03:47:39,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.6666666666666667) internal successors, (140), 83 states have internal predecessors, (140), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:39,606 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 153 transitions. [2022-02-24 03:47:39,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-24 03:47:39,606 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:39,607 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:39,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:47:39,607 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:39,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:39,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1257217541, now seen corresponding path program 27 times [2022-02-24 03:47:39,607 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:39,607 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [808707862] [2022-02-24 03:47:39,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:39,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:39,743 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:39,842 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:39,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:40,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:40,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:40,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:41,528 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:41,528 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [808707862] [2022-02-24 03:47:41,528 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [808707862] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:41,528 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:41,528 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 03:47:41,528 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128646223] [2022-02-24 03:47:41,528 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:41,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 03:47:41,529 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:41,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 03:47:41,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2172, Invalid=5310, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:47:41,530 INFO L87 Difference]: Start difference. First operand 150 states and 153 transitions. Second operand has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 86 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:45,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:45,557 INFO L93 Difference]: Finished difference Result 297 states and 308 transitions. [2022-02-24 03:47:45,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 03:47:45,557 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 86 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-02-24 03:47:45,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:45,558 INFO L225 Difference]: With dead ends: 297 [2022-02-24 03:47:45,558 INFO L226 Difference]: Without dead ends: 155 [2022-02-24 03:47:45,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 62 SyntacticMatches, 1 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8158 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=6510, Invalid=22560, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 03:47:45,560 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 123 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 6252 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 6252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:45,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 49 Invalid, 6465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 6252 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:47:45,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-24 03:47:45,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 155. [2022-02-24 03:47:45,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 150 states have (on average 1.0266666666666666) internal successors, (154), 150 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:45,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 158 transitions. [2022-02-24 03:47:45,566 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 158 transitions. Word has length 149 [2022-02-24 03:47:45,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:45,566 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 158 transitions. [2022-02-24 03:47:45,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.6666666666666667) internal successors, (145), 86 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:45,566 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 158 transitions. [2022-02-24 03:47:45,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-02-24 03:47:45,567 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:45,567 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:45,567 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:47:45,567 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:45,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:45,568 INFO L85 PathProgramCache]: Analyzing trace with hash 440648466, now seen corresponding path program 28 times [2022-02-24 03:47:45,568 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:45,568 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [966464236] [2022-02-24 03:47:45,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:45,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:45,822 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:45,956 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:45,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:46,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:46,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:47,726 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:47,726 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [966464236] [2022-02-24 03:47:47,726 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [966464236] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:47,726 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:47,726 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 03:47:47,726 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392232774] [2022-02-24 03:47:47,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:47,726 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 03:47:47,726 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:47,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 03:47:47,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2322, Invalid=5688, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:47:47,728 INFO L87 Difference]: Start difference. First operand 155 states and 158 transitions. Second operand has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 89 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:52,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:52,039 INFO L93 Difference]: Finished difference Result 307 states and 318 transitions. [2022-02-24 03:47:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 03:47:52,039 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 89 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 154 [2022-02-24 03:47:52,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:52,045 INFO L225 Difference]: With dead ends: 307 [2022-02-24 03:47:52,045 INFO L226 Difference]: Without dead ends: 160 [2022-02-24 03:47:52,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8754 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=6960, Invalid=24192, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 03:47:52,048 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 187 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 6727 mSolverCounterSat, 281 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 7008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 281 IncrementalHoareTripleChecker+Valid, 6727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:52,048 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 64 Invalid, 7008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [281 Valid, 6727 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:47:52,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2022-02-24 03:47:52,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 160. [2022-02-24 03:47:52,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0258064516129033) internal successors, (159), 155 states have internal predecessors, (159), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:52,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 163 transitions. [2022-02-24 03:47:52,055 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 163 transitions. Word has length 154 [2022-02-24 03:47:52,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:52,055 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 163 transitions. [2022-02-24 03:47:52,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.6666666666666667) internal successors, (150), 89 states have internal predecessors, (150), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:52,055 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 163 transitions. [2022-02-24 03:47:52,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-02-24 03:47:52,056 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:52,056 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:52,056 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:47:52,056 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:52,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:52,057 INFO L85 PathProgramCache]: Analyzing trace with hash -2044387705, now seen corresponding path program 29 times [2022-02-24 03:47:52,057 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:52,057 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1203112898] [2022-02-24 03:47:52,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:52,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:52,164 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:52,296 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:52,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:52,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:52,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:52,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:54,127 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:54,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1203112898] [2022-02-24 03:47:54,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1203112898] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:54,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:54,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-02-24 03:47:54,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021014302] [2022-02-24 03:47:54,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:54,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2022-02-24 03:47:54,128 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:54,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2022-02-24 03:47:54,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2477, Invalid=6079, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:47:54,130 INFO L87 Difference]: Start difference. First operand 160 states and 163 transitions. Second operand has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 92 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:58,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:58,769 INFO L93 Difference]: Finished difference Result 317 states and 328 transitions. [2022-02-24 03:47:58,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-24 03:47:58,769 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 92 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-02-24 03:47:58,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:58,770 INFO L225 Difference]: With dead ends: 317 [2022-02-24 03:47:58,770 INFO L226 Difference]: Without dead ends: 165 [2022-02-24 03:47:58,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 66 SyntacticMatches, 1 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9371 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=7425, Invalid=25881, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 03:47:58,772 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 316 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 7227 mSolverCounterSat, 411 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 316 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 7638 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 411 IncrementalHoareTripleChecker+Valid, 7227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:58,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [316 Valid, 39 Invalid, 7638 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [411 Valid, 7227 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-24 03:47:58,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2022-02-24 03:47:58,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 165. [2022-02-24 03:47:58,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 160 states have (on average 1.025) internal successors, (164), 160 states have internal predecessors, (164), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:58,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 168 transitions. [2022-02-24 03:47:58,778 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 168 transitions. Word has length 159 [2022-02-24 03:47:58,778 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:58,779 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 168 transitions. [2022-02-24 03:47:58,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.6666666666666667) internal successors, (155), 92 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:58,779 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 168 transitions. [2022-02-24 03:47:58,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-24 03:47:58,780 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:58,780 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:58,780 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:47:58,780 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:58,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:58,780 INFO L85 PathProgramCache]: Analyzing trace with hash 264225670, now seen corresponding path program 30 times [2022-02-24 03:47:58,780 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:58,780 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2059473961] [2022-02-24 03:47:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:58,886 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:59,030 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:59,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:59,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:59,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:59,384 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:00,971 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:00,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2059473961] [2022-02-24 03:48:00,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2059473961] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:00,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:00,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 03:48:00,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418529071] [2022-02-24 03:48:00,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:00,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 03:48:00,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:00,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 03:48:00,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2637, Invalid=6483, Unknown=0, NotChecked=0, Total=9120 [2022-02-24 03:48:00,974 INFO L87 Difference]: Start difference. First operand 165 states and 168 transitions. Second operand has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:05,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:05,966 INFO L93 Difference]: Finished difference Result 327 states and 338 transitions. [2022-02-24 03:48:05,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 03:48:05,966 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-24 03:48:05,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:05,967 INFO L225 Difference]: With dead ends: 327 [2022-02-24 03:48:05,967 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 03:48:05,969 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 187 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10009 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=7905, Invalid=27627, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 03:48:05,969 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 326 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7723 mSolverCounterSat, 424 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 326 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8147 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 424 IncrementalHoareTripleChecker+Valid, 7723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:05,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [326 Valid, 34 Invalid, 8147 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [424 Valid, 7723 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:48:05,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 03:48:05,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-24 03:48:05,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0242424242424242) internal successors, (169), 165 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:05,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 173 transitions. [2022-02-24 03:48:05,975 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 173 transitions. Word has length 164 [2022-02-24 03:48:05,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:05,976 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 173 transitions. [2022-02-24 03:48:05,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.6666666666666667) internal successors, (160), 95 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:05,976 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 173 transitions. [2022-02-24 03:48:05,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-24 03:48:05,976 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:05,976 INFO L514 BasicCegarLoop]: trace histogram [63, 62, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:05,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:48:05,976 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:05,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:05,977 INFO L85 PathProgramCache]: Analyzing trace with hash 1788817683, now seen corresponding path program 31 times [2022-02-24 03:48:05,977 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:05,977 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1498827477] [2022-02-24 03:48:05,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:05,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:06,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:06,262 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:06,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:06,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:06,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:06,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:08,296 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:08,296 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1498827477] [2022-02-24 03:48:08,296 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1498827477] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:08,297 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:08,297 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [99] imperfect sequences [] total 99 [2022-02-24 03:48:08,297 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866399752] [2022-02-24 03:48:08,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:08,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2022-02-24 03:48:08,297 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:08,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2022-02-24 03:48:08,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2802, Invalid=6900, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:48:08,298 INFO L87 Difference]: Start difference. First operand 170 states and 173 transitions. Second operand has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 98 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:13,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:13,579 INFO L93 Difference]: Finished difference Result 337 states and 348 transitions. [2022-02-24 03:48:13,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-24 03:48:13,580 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 98 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-02-24 03:48:13,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:13,580 INFO L225 Difference]: With dead ends: 337 [2022-02-24 03:48:13,581 INFO L226 Difference]: Without dead ends: 175 [2022-02-24 03:48:13,582 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 264 GetRequests, 70 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10668 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=8400, Invalid=29430, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 03:48:13,583 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 402 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 8249 mSolverCounterSat, 438 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 402 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 8687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 438 IncrementalHoareTripleChecker+Valid, 8249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:13,583 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [402 Valid, 64 Invalid, 8687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [438 Valid, 8249 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:48:13,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-24 03:48:13,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 175. [2022-02-24 03:48:13,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.0235294117647058) internal successors, (174), 170 states have internal predecessors, (174), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 178 transitions. [2022-02-24 03:48:13,589 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 178 transitions. Word has length 169 [2022-02-24 03:48:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:13,589 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 178 transitions. [2022-02-24 03:48:13,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.6666666666666667) internal successors, (165), 98 states have internal predecessors, (165), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:13,589 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 178 transitions. [2022-02-24 03:48:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-02-24 03:48:13,590 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:13,590 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:13,590 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:48:13,590 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:13,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:13,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1470156282, now seen corresponding path program 32 times [2022-02-24 03:48:13,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:13,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [311899149] [2022-02-24 03:48:13,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:13,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:13,704 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:13,853 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:13,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:14,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:14,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:14,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:16,073 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:16,074 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [311899149] [2022-02-24 03:48:16,074 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [311899149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:16,074 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:16,074 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-24 03:48:16,074 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150037848] [2022-02-24 03:48:16,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:16,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-24 03:48:16,074 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-24 03:48:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2972, Invalid=7330, Unknown=0, NotChecked=0, Total=10302 [2022-02-24 03:48:16,076 INFO L87 Difference]: Start difference. First operand 175 states and 178 transitions. Second operand has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 101 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:21,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:21,618 INFO L93 Difference]: Finished difference Result 347 states and 358 transitions. [2022-02-24 03:48:21,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2022-02-24 03:48:21,619 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 101 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 174 [2022-02-24 03:48:21,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:21,619 INFO L225 Difference]: With dead ends: 347 [2022-02-24 03:48:21,620 INFO L226 Difference]: Without dead ends: 180 [2022-02-24 03:48:21,621 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 72 SyntacticMatches, 1 SemanticMatches, 199 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11348 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=8910, Invalid=31290, Unknown=0, NotChecked=0, Total=40200 [2022-02-24 03:48:21,622 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 483 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 8635 mSolverCounterSat, 318 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 483 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 8953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 318 IncrementalHoareTripleChecker+Valid, 8635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:21,622 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [483 Valid, 29 Invalid, 8953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [318 Valid, 8635 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-24 03:48:21,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-24 03:48:21,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 180. [2022-02-24 03:48:21,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 175 states have (on average 1.022857142857143) internal successors, (179), 175 states have internal predecessors, (179), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:21,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 183 transitions. [2022-02-24 03:48:21,628 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 183 transitions. Word has length 174 [2022-02-24 03:48:21,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:21,628 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 183 transitions. [2022-02-24 03:48:21,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.6666666666666667) internal successors, (170), 101 states have internal predecessors, (170), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:21,629 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 183 transitions. [2022-02-24 03:48:21,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-24 03:48:21,629 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:21,630 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:21,630 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:48:21,630 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:21,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:21,630 INFO L85 PathProgramCache]: Analyzing trace with hash 855234975, now seen corresponding path program 33 times [2022-02-24 03:48:21,630 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:21,630 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1582352383] [2022-02-24 03:48:21,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:21,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:21,832 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:21,987 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:21,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:22,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:22,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:22,416 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:24,315 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:24,315 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1582352383] [2022-02-24 03:48:24,315 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1582352383] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:24,315 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:24,315 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 03:48:24,315 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002978002] [2022-02-24 03:48:24,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:24,315 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 03:48:24,315 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:24,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 03:48:24,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3147, Invalid=7773, Unknown=0, NotChecked=0, Total=10920 [2022-02-24 03:48:24,317 INFO L87 Difference]: Start difference. First operand 180 states and 183 transitions. Second operand has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:30,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:30,125 INFO L93 Difference]: Finished difference Result 357 states and 368 transitions. [2022-02-24 03:48:30,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 03:48:30,125 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-24 03:48:30,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:30,126 INFO L225 Difference]: With dead ends: 357 [2022-02-24 03:48:30,126 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 03:48:30,128 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12049 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9435, Invalid=33207, Unknown=0, NotChecked=0, Total=42642 [2022-02-24 03:48:30,128 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 495 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9186 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 495 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9373 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 9186 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:30,128 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [495 Valid, 49 Invalid, 9373 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 9186 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-24 03:48:30,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 03:48:30,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-02-24 03:48:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0222222222222221) internal successors, (184), 180 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 188 transitions. [2022-02-24 03:48:30,135 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 188 transitions. Word has length 179 [2022-02-24 03:48:30,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:30,135 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 188 transitions. [2022-02-24 03:48:30,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.6666666666666667) internal successors, (175), 104 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:30,135 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 188 transitions. [2022-02-24 03:48:30,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-24 03:48:30,136 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:30,136 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:30,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:48:30,136 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:30,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:30,143 INFO L85 PathProgramCache]: Analyzing trace with hash -2050252178, now seen corresponding path program 34 times [2022-02-24 03:48:30,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:30,143 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [44425384] [2022-02-24 03:48:30,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:30,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:30,293 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:30,396 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:30,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:30,828 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:30,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:30,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:32,828 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:32,829 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [44425384] [2022-02-24 03:48:32,829 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [44425384] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:32,829 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:32,829 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-24 03:48:32,829 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614167849] [2022-02-24 03:48:32,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:32,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-24 03:48:32,829 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:32,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-24 03:48:32,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3327, Invalid=8229, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:48:32,831 INFO L87 Difference]: Start difference. First operand 185 states and 188 transitions. Second operand has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 107 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:39,073 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:39,074 INFO L93 Difference]: Finished difference Result 367 states and 378 transitions. [2022-02-24 03:48:39,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2022-02-24 03:48:39,074 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 107 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 184 [2022-02-24 03:48:39,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:39,075 INFO L225 Difference]: With dead ends: 367 [2022-02-24 03:48:39,075 INFO L226 Difference]: Without dead ends: 190 [2022-02-24 03:48:39,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12771 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=9975, Invalid=35181, Unknown=0, NotChecked=0, Total=45156 [2022-02-24 03:48:39,077 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 295 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9801 mSolverCounterSat, 406 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 406 IncrementalHoareTripleChecker+Valid, 9801 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:39,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [295 Valid, 39 Invalid, 10207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [406 Valid, 9801 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:48:39,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2022-02-24 03:48:39,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 190. [2022-02-24 03:48:39,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0216216216216216) internal successors, (189), 185 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:39,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 193 transitions. [2022-02-24 03:48:39,084 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 193 transitions. Word has length 184 [2022-02-24 03:48:39,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:39,084 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 193 transitions. [2022-02-24 03:48:39,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 1.6666666666666667) internal successors, (180), 107 states have internal predecessors, (180), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:39,084 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 193 transitions. [2022-02-24 03:48:39,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2022-02-24 03:48:39,085 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:39,085 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:39,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:48:39,085 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:39,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:39,085 INFO L85 PathProgramCache]: Analyzing trace with hash -839886805, now seen corresponding path program 35 times [2022-02-24 03:48:39,085 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:39,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1129243828] [2022-02-24 03:48:39,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:39,086 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:39,260 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:39,395 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:39,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:39,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:39,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:39,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:41,954 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:41,954 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1129243828] [2022-02-24 03:48:41,954 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1129243828] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:41,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:41,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 03:48:41,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119863372] [2022-02-24 03:48:41,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:41,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 03:48:41,955 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:41,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 03:48:41,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3512, Invalid=8698, Unknown=0, NotChecked=0, Total=12210 [2022-02-24 03:48:41,956 INFO L87 Difference]: Start difference. First operand 190 states and 193 transitions. Second operand has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 110 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:48,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:48,486 INFO L93 Difference]: Finished difference Result 377 states and 388 transitions. [2022-02-24 03:48:48,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 03:48:48,486 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 110 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 189 [2022-02-24 03:48:48,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:48,487 INFO L225 Difference]: With dead ends: 377 [2022-02-24 03:48:48,487 INFO L226 Difference]: Without dead ends: 195 [2022-02-24 03:48:48,489 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13514 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=10530, Invalid=37212, Unknown=0, NotChecked=0, Total=47742 [2022-02-24 03:48:48,489 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 228 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10315 mSolverCounterSat, 340 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 340 IncrementalHoareTripleChecker+Valid, 10315 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:48,489 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 39 Invalid, 10655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [340 Valid, 10315 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-24 03:48:48,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2022-02-24 03:48:48,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 195. [2022-02-24 03:48:48,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 190 states have (on average 1.0210526315789474) internal successors, (194), 190 states have internal predecessors, (194), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:48,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 198 transitions. [2022-02-24 03:48:48,496 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 198 transitions. Word has length 189 [2022-02-24 03:48:48,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:48,496 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 198 transitions. [2022-02-24 03:48:48,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.6666666666666667) internal successors, (185), 110 states have internal predecessors, (185), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:48,496 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 198 transitions. [2022-02-24 03:48:48,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-02-24 03:48:48,497 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:48,497 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:48,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:48:48,497 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:48,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:48,497 INFO L85 PathProgramCache]: Analyzing trace with hash 31785186, now seen corresponding path program 36 times [2022-02-24 03:48:48,497 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:48,497 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1806678019] [2022-02-24 03:48:48,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:48,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:48,631 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:48,769 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:48,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:49,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:51,447 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:51,447 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1806678019] [2022-02-24 03:48:51,447 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1806678019] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:51,447 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:51,447 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-24 03:48:51,447 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315120473] [2022-02-24 03:48:51,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:51,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-24 03:48:51,448 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:51,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-24 03:48:51,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3702, Invalid=9180, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:48:51,449 INFO L87 Difference]: Start difference. First operand 195 states and 198 transitions. Second operand has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 113 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:58,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:58,388 INFO L93 Difference]: Finished difference Result 387 states and 398 transitions. [2022-02-24 03:48:58,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2022-02-24 03:48:58,388 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 113 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-02-24 03:48:58,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:58,389 INFO L225 Difference]: With dead ends: 387 [2022-02-24 03:48:58,389 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 03:48:58,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 304 GetRequests, 79 SyntacticMatches, 2 SemanticMatches, 223 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14314 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=11100, Invalid=39300, Unknown=0, NotChecked=0, Total=50400 [2022-02-24 03:48:58,392 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 384 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10923 mSolverCounterSat, 500 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 11423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 500 IncrementalHoareTripleChecker+Valid, 10923 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:58,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 39 Invalid, 11423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [500 Valid, 10923 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:48:58,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 03:48:58,398 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2022-02-24 03:48:58,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 195 states have (on average 1.0205128205128204) internal successors, (199), 195 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:58,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 203 transitions. [2022-02-24 03:48:58,398 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 203 transitions. Word has length 194 [2022-02-24 03:48:58,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:58,399 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 203 transitions. [2022-02-24 03:48:58,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 1.6666666666666667) internal successors, (190), 113 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:48:58,399 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 203 transitions. [2022-02-24 03:48:58,399 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-24 03:48:58,399 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:58,400 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:58,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:48:58,400 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:58,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:58,400 INFO L85 PathProgramCache]: Analyzing trace with hash -461509449, now seen corresponding path program 37 times [2022-02-24 03:48:58,400 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:58,400 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1138536699] [2022-02-24 03:48:58,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:58,401 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:58,542 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:58,648 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:58,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:59,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:59,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:59,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:01,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:01,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1138536699] [2022-02-24 03:49:01,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1138536699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:01,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:01,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 03:49:01,452 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122501992] [2022-02-24 03:49:01,452 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:01,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 03:49:01,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:01,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 03:49:01,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3897, Invalid=9675, Unknown=0, NotChecked=0, Total=13572 [2022-02-24 03:49:01,453 INFO L87 Difference]: Start difference. First operand 200 states and 203 transitions. Second operand has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 116 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:08,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:08,823 INFO L93 Difference]: Finished difference Result 397 states and 408 transitions. [2022-02-24 03:49:08,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 03:49:08,824 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 116 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-02-24 03:49:08,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:08,825 INFO L225 Difference]: With dead ends: 397 [2022-02-24 03:49:08,825 INFO L226 Difference]: Without dead ends: 205 [2022-02-24 03:49:08,827 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 312 GetRequests, 82 SyntacticMatches, 1 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15063 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=11685, Invalid=41445, Unknown=0, NotChecked=0, Total=53130 [2022-02-24 03:49:08,828 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 473 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 11524 mSolverCounterSat, 516 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 473 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 12040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 516 IncrementalHoareTripleChecker+Valid, 11524 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:08,828 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [473 Valid, 29 Invalid, 12040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [516 Valid, 11524 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:49:08,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2022-02-24 03:49:08,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2022-02-24 03:49:08,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.02) internal successors, (204), 200 states have internal predecessors, (204), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:08,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 208 transitions. [2022-02-24 03:49:08,835 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 208 transitions. Word has length 199 [2022-02-24 03:49:08,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:08,835 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 208 transitions. [2022-02-24 03:49:08,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.6666666666666667) internal successors, (195), 116 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:08,835 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 208 transitions. [2022-02-24 03:49:08,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-24 03:49:08,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:08,836 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:08,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:49:08,836 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:08,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:08,836 INFO L85 PathProgramCache]: Analyzing trace with hash 1800513878, now seen corresponding path program 38 times [2022-02-24 03:49:08,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:08,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147280513] [2022-02-24 03:49:08,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:08,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:08,977 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:09,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:09,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:09,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:09,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:09,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:12,138 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:12,138 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147280513] [2022-02-24 03:49:12,138 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [147280513] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:12,138 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:12,138 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-24 03:49:12,138 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34444] [2022-02-24 03:49:12,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:12,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-24 03:49:12,139 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:12,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-24 03:49:12,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=10183, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:49:12,140 INFO L87 Difference]: Start difference. First operand 205 states and 208 transitions. Second operand has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 119 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:19,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:19,747 INFO L93 Difference]: Finished difference Result 407 states and 418 transitions. [2022-02-24 03:49:19,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2022-02-24 03:49:19,747 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 119 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 204 [2022-02-24 03:49:19,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:19,748 INFO L225 Difference]: With dead ends: 407 [2022-02-24 03:49:19,748 INFO L226 Difference]: Without dead ends: 210 [2022-02-24 03:49:19,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 235 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15907 ImplicationChecksByTransitivity, 6.8s TimeCoverageRelationStatistics Valid=12285, Invalid=43647, Unknown=0, NotChecked=0, Total=55932 [2022-02-24 03:49:19,750 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 167 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 12098 mSolverCounterSat, 286 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 167 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 12384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 286 IncrementalHoareTripleChecker+Valid, 12098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:19,750 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [167 Valid, 49 Invalid, 12384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [286 Valid, 12098 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 03:49:19,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-24 03:49:19,757 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 210. [2022-02-24 03:49:19,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.0195121951219512) internal successors, (209), 205 states have internal predecessors, (209), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:19,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 213 transitions. [2022-02-24 03:49:19,757 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 213 transitions. Word has length 204 [2022-02-24 03:49:19,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:19,757 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 213 transitions. [2022-02-24 03:49:19,758 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 1.6666666666666667) internal successors, (200), 119 states have internal predecessors, (200), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:19,758 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 213 transitions. [2022-02-24 03:49:19,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-24 03:49:19,758 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:19,758 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:19,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:49:19,759 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:19,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:19,759 INFO L85 PathProgramCache]: Analyzing trace with hash 1977472835, now seen corresponding path program 39 times [2022-02-24 03:49:19,759 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:19,759 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [59129914] [2022-02-24 03:49:19,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:19,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:19,876 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:20,020 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:20,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:20,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:20,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:20,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:23,093 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:23,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [59129914] [2022-02-24 03:49:23,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [59129914] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:23,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:23,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [123] imperfect sequences [] total 123 [2022-02-24 03:49:23,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706299912] [2022-02-24 03:49:23,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:23,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2022-02-24 03:49:23,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:23,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2022-02-24 03:49:23,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4302, Invalid=10704, Unknown=0, NotChecked=0, Total=15006 [2022-02-24 03:49:23,096 INFO L87 Difference]: Start difference. First operand 210 states and 213 transitions. Second operand has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 122 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:31,138 INFO L93 Difference]: Finished difference Result 417 states and 428 transitions. [2022-02-24 03:49:31,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-24 03:49:31,138 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 122 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-02-24 03:49:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:31,139 INFO L225 Difference]: With dead ends: 417 [2022-02-24 03:49:31,139 INFO L226 Difference]: Without dead ends: 215 [2022-02-24 03:49:31,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16696 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=12900, Invalid=45906, Unknown=0, NotChecked=0, Total=58806 [2022-02-24 03:49:31,143 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 335 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12763 mSolverCounterSat, 461 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 335 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 13224 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 461 IncrementalHoareTripleChecker+Valid, 12763 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:31,143 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [335 Valid, 29 Invalid, 13224 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [461 Valid, 12763 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 03:49:31,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-24 03:49:31,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 215. [2022-02-24 03:49:31,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 210 states have (on average 1.019047619047619) internal successors, (214), 210 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:31,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 218 transitions. [2022-02-24 03:49:31,170 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 218 transitions. Word has length 209 [2022-02-24 03:49:31,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:31,170 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 218 transitions. [2022-02-24 03:49:31,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 1.6666666666666667) internal successors, (205), 122 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:31,170 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 218 transitions. [2022-02-24 03:49:31,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-02-24 03:49:31,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:31,171 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:31,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:49:31,171 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:31,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:31,171 INFO L85 PathProgramCache]: Analyzing trace with hash -46769206, now seen corresponding path program 40 times [2022-02-24 03:49:31,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:31,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1817761276] [2022-02-24 03:49:31,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:31,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:31,279 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:31,420 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:31,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:31,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:31,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:31,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:34,655 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:34,656 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1817761276] [2022-02-24 03:49:34,656 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1817761276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:34,656 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:34,656 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 03:49:34,656 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266771239] [2022-02-24 03:49:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:34,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 03:49:34,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:34,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 03:49:34,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4512, Invalid=11238, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 03:49:34,657 INFO L87 Difference]: Start difference. First operand 215 states and 218 transitions. Second operand has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 125 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:43,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:43,119 INFO L93 Difference]: Finished difference Result 427 states and 438 transitions. [2022-02-24 03:49:43,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 03:49:43,120 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 125 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 214 [2022-02-24 03:49:43,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:43,120 INFO L225 Difference]: With dead ends: 427 [2022-02-24 03:49:43,120 INFO L226 Difference]: Without dead ends: 220 [2022-02-24 03:49:43,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 336 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 247 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17544 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=13530, Invalid=48222, Unknown=0, NotChecked=0, Total=61752 [2022-02-24 03:49:43,123 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 259 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 13407 mSolverCounterSat, 389 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 13796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 389 IncrementalHoareTripleChecker+Valid, 13407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:43,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 44 Invalid, 13796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [389 Valid, 13407 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-24 03:49:43,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2022-02-24 03:49:43,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 220. [2022-02-24 03:49:43,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0186046511627906) internal successors, (219), 215 states have internal predecessors, (219), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:43,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 223 transitions. [2022-02-24 03:49:43,130 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 223 transitions. Word has length 214 [2022-02-24 03:49:43,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:43,130 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 223 transitions. [2022-02-24 03:49:43,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.6666666666666667) internal successors, (210), 125 states have internal predecessors, (210), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:43,131 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 223 transitions. [2022-02-24 03:49:43,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-24 03:49:43,132 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:43,132 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:43,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:49:43,132 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:43,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:43,132 INFO L85 PathProgramCache]: Analyzing trace with hash 1938511823, now seen corresponding path program 41 times [2022-02-24 03:49:43,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:43,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1490536921] [2022-02-24 03:49:43,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:43,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:43,280 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:43,419 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:43,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:44,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:44,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:44,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:46,834 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:46,834 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1490536921] [2022-02-24 03:49:46,834 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1490536921] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:46,834 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:46,834 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [129] imperfect sequences [] total 129 [2022-02-24 03:49:46,834 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632284485] [2022-02-24 03:49:46,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:46,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2022-02-24 03:49:46,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:46,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2022-02-24 03:49:46,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4727, Invalid=11785, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:49:46,836 INFO L87 Difference]: Start difference. First operand 220 states and 223 transitions. Second operand has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 128 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:55,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:55,681 INFO L93 Difference]: Finished difference Result 437 states and 448 transitions. [2022-02-24 03:49:55,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-24 03:49:55,681 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 128 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-02-24 03:49:55,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:55,682 INFO L225 Difference]: With dead ends: 437 [2022-02-24 03:49:55,682 INFO L226 Difference]: Without dead ends: 225 [2022-02-24 03:49:55,685 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18413 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=14175, Invalid=50595, Unknown=0, NotChecked=0, Total=64770 [2022-02-24 03:49:55,685 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 351 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14023 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14419 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 14023 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:55,685 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [351 Valid, 24 Invalid, 14419 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 14023 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-24 03:49:55,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-24 03:49:55,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 225. [2022-02-24 03:49:55,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 220 states have (on average 1.018181818181818) internal successors, (224), 220 states have internal predecessors, (224), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:55,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 228 transitions. [2022-02-24 03:49:55,693 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 228 transitions. Word has length 219 [2022-02-24 03:49:55,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:55,693 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 228 transitions. [2022-02-24 03:49:55,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 1.6666666666666667) internal successors, (215), 128 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:49:55,693 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 228 transitions. [2022-02-24 03:49:55,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-24 03:49:55,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:55,694 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:55,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:49:55,694 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:55,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:55,694 INFO L85 PathProgramCache]: Analyzing trace with hash -227026882, now seen corresponding path program 42 times [2022-02-24 03:49:55,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:55,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1431264565] [2022-02-24 03:49:55,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:55,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:55,842 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:55,982 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:56,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:56,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:56,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:59,526 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:59,526 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1431264565] [2022-02-24 03:49:59,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1431264565] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:59,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:59,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 03:49:59,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490967477] [2022-02-24 03:49:59,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:59,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 03:49:59,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:59,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 03:49:59,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4947, Invalid=12345, Unknown=0, NotChecked=0, Total=17292 [2022-02-24 03:49:59,528 INFO L87 Difference]: Start difference. First operand 225 states and 228 transitions. Second operand has 132 states, 132 states have (on average 1.6666666666666667) internal successors, (220), 131 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:09,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:09,039 INFO L93 Difference]: Finished difference Result 447 states and 458 transitions. [2022-02-24 03:50:09,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 03:50:09,039 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.6666666666666667) internal successors, (220), 131 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-24 03:50:09,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:09,040 INFO L225 Difference]: With dead ends: 447 [2022-02-24 03:50:09,040 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 03:50:09,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 92 SyntacticMatches, 1 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19303 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=14835, Invalid=53025, Unknown=0, NotChecked=0, Total=67860 [2022-02-24 03:50:09,044 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 711 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14751 mSolverCounterSat, 848 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 711 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 15599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 848 IncrementalHoareTripleChecker+Valid, 14751 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:09,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [711 Valid, 34 Invalid, 15599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [848 Valid, 14751 Invalid, 0 Unknown, 0 Unchecked, 4.4s Time] [2022-02-24 03:50:09,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 03:50:09,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 230. [2022-02-24 03:50:09,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 225 states have (on average 1.0177777777777777) internal successors, (229), 225 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:09,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 233 transitions. [2022-02-24 03:50:09,052 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 233 transitions. Word has length 224 [2022-02-24 03:50:09,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:09,052 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 233 transitions. [2022-02-24 03:50:09,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.6666666666666667) internal successors, (220), 131 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:09,052 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 233 transitions. [2022-02-24 03:50:09,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-24 03:50:09,053 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:09,053 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:09,053 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:50:09,053 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:09,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:09,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1564585563, now seen corresponding path program 43 times [2022-02-24 03:50:09,054 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:09,054 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852591634] [2022-02-24 03:50:09,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:09,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:09,210 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:09,359 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:09,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:10,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:10,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:10,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:13,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:13,075 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852591634] [2022-02-24 03:50:13,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852591634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:13,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:13,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [135] imperfect sequences [] total 135 [2022-02-24 03:50:13,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601355291] [2022-02-24 03:50:13,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:13,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 135 states [2022-02-24 03:50:13,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:13,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 135 interpolants. [2022-02-24 03:50:13,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5172, Invalid=12918, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:50:13,078 INFO L87 Difference]: Start difference. First operand 230 states and 233 transitions. Second operand has 135 states, 135 states have (on average 1.6666666666666667) internal successors, (225), 134 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:23,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:23,094 INFO L93 Difference]: Finished difference Result 457 states and 468 transitions. [2022-02-24 03:50:23,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-24 03:50:23,095 INFO L78 Accepts]: Start accepts. Automaton has has 135 states, 135 states have (on average 1.6666666666666667) internal successors, (225), 134 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-02-24 03:50:23,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:23,095 INFO L225 Difference]: With dead ends: 457 [2022-02-24 03:50:23,095 INFO L226 Difference]: Without dead ends: 235 [2022-02-24 03:50:23,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 360 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20214 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=15510, Invalid=55512, Unknown=0, NotChecked=0, Total=71022 [2022-02-24 03:50:23,098 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 456 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 15484 mSolverCounterSat, 505 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 456 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15989 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 505 IncrementalHoareTripleChecker+Valid, 15484 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:23,098 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [456 Valid, 59 Invalid, 15989 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [505 Valid, 15484 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-24 03:50:23,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2022-02-24 03:50:23,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 235. [2022-02-24 03:50:23,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.017391304347826) internal successors, (234), 230 states have internal predecessors, (234), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:23,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 238 transitions. [2022-02-24 03:50:23,106 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 238 transitions. Word has length 229 [2022-02-24 03:50:23,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:23,107 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 238 transitions. [2022-02-24 03:50:23,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 135 states, 135 states have (on average 1.6666666666666667) internal successors, (225), 134 states have internal predecessors, (225), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:23,107 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 238 transitions. [2022-02-24 03:50:23,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-02-24 03:50:23,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:23,108 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:23,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:50:23,108 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:23,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:23,108 INFO L85 PathProgramCache]: Analyzing trace with hash -373629262, now seen corresponding path program 44 times [2022-02-24 03:50:23,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:23,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221280624] [2022-02-24 03:50:23,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:23,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:23,274 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:23,434 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:23,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:24,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:24,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:24,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:27,304 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:27,304 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221280624] [2022-02-24 03:50:27,304 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221280624] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:27,304 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:27,304 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-24 03:50:27,305 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652298918] [2022-02-24 03:50:27,305 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:27,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-24 03:50:27,305 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:27,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-24 03:50:27,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5402, Invalid=13504, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 03:50:27,307 INFO L87 Difference]: Start difference. First operand 235 states and 238 transitions. Second operand has 138 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 137 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:37,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:37,830 INFO L93 Difference]: Finished difference Result 467 states and 478 transitions. [2022-02-24 03:50:37,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-24 03:50:37,831 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 137 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 234 [2022-02-24 03:50:37,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:37,832 INFO L225 Difference]: With dead ends: 467 [2022-02-24 03:50:37,832 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 03:50:37,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 96 SyntacticMatches, 1 SemanticMatches, 271 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21146 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=16200, Invalid=58056, Unknown=0, NotChecked=0, Total=74256 [2022-02-24 03:50:37,836 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 559 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 16159 mSolverCounterSat, 700 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 559 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 16859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 700 IncrementalHoareTripleChecker+Valid, 16159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:37,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [559 Valid, 49 Invalid, 16859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [700 Valid, 16159 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-24 03:50:37,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 03:50:37,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-24 03:50:37,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0170212765957447) internal successors, (239), 235 states have internal predecessors, (239), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:37,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 243 transitions. [2022-02-24 03:50:37,856 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 243 transitions. Word has length 234 [2022-02-24 03:50:37,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:37,856 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 243 transitions. [2022-02-24 03:50:37,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.6666666666666667) internal successors, (230), 137 states have internal predecessors, (230), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:37,856 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 243 transitions. [2022-02-24 03:50:37,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-24 03:50:37,857 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:37,857 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:37,857 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:50:37,857 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:37,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:37,858 INFO L85 PathProgramCache]: Analyzing trace with hash -587457817, now seen corresponding path program 45 times [2022-02-24 03:50:37,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:37,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1099723918] [2022-02-24 03:50:37,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:37,858 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:38,013 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:38,130 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:38,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:38,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:38,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:38,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:42,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:42,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1099723918] [2022-02-24 03:50:42,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1099723918] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:42,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:42,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [141] imperfect sequences [] total 141 [2022-02-24 03:50:42,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030637852] [2022-02-24 03:50:42,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:42,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2022-02-24 03:50:42,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:42,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2022-02-24 03:50:42,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5637, Invalid=14103, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:50:42,143 INFO L87 Difference]: Start difference. First operand 240 states and 243 transitions. Second operand has 141 states, 141 states have (on average 1.6666666666666667) internal successors, (235), 140 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:53,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:53,079 INFO L93 Difference]: Finished difference Result 477 states and 488 transitions. [2022-02-24 03:50:53,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-24 03:50:53,080 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 141 states have (on average 1.6666666666666667) internal successors, (235), 140 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-24 03:50:53,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:53,080 INFO L225 Difference]: With dead ends: 477 [2022-02-24 03:50:53,081 INFO L226 Difference]: Without dead ends: 245 [2022-02-24 03:50:53,084 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22099 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=16905, Invalid=60657, Unknown=0, NotChecked=0, Total=77562 [2022-02-24 03:50:53,084 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 570 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 16866 mSolverCounterSat, 528 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 528 IncrementalHoareTripleChecker+Valid, 16866 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:53,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 39 Invalid, 17394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [528 Valid, 16866 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-24 03:50:53,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-24 03:50:53,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 245. [2022-02-24 03:50:53,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 240 states have (on average 1.0166666666666666) internal successors, (244), 240 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 248 transitions. [2022-02-24 03:50:53,093 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 248 transitions. Word has length 239 [2022-02-24 03:50:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:53,093 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 248 transitions. [2022-02-24 03:50:53,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 141 states have (on average 1.6666666666666667) internal successors, (235), 140 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:50:53,093 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 248 transitions. [2022-02-24 03:50:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2022-02-24 03:50:53,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:53,094 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:53,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:50:53,094 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:53,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:53,095 INFO L85 PathProgramCache]: Analyzing trace with hash 1231302438, now seen corresponding path program 46 times [2022-02-24 03:50:53,095 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:53,095 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [707223699] [2022-02-24 03:50:53,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:53,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:53,209 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:53,366 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:53,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:54,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:54,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:54,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:57,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:57,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [707223699] [2022-02-24 03:50:57,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [707223699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:57,516 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:57,516 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-02-24 03:50:57,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753377641] [2022-02-24 03:50:57,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:57,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-02-24 03:50:57,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:57,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-02-24 03:50:57,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5877, Invalid=14715, Unknown=0, NotChecked=0, Total=20592 [2022-02-24 03:50:57,518 INFO L87 Difference]: Start difference. First operand 245 states and 248 transitions. Second operand has 144 states, 144 states have (on average 1.6666666666666667) internal successors, (240), 143 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:08,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:08,878 INFO L93 Difference]: Finished difference Result 487 states and 498 transitions. [2022-02-24 03:51:08,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 144 states. [2022-02-24 03:51:08,878 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 144 states have (on average 1.6666666666666667) internal successors, (240), 143 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 244 [2022-02-24 03:51:08,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:08,879 INFO L225 Difference]: With dead ends: 487 [2022-02-24 03:51:08,879 INFO L226 Difference]: Without dead ends: 250 [2022-02-24 03:51:08,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 384 GetRequests, 100 SyntacticMatches, 1 SemanticMatches, 283 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23073 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=17625, Invalid=63315, Unknown=0, NotChecked=0, Total=80940 [2022-02-24 03:51:08,883 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 391 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 17607 mSolverCounterSat, 536 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 18143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 536 IncrementalHoareTripleChecker+Valid, 17607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:08,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [391 Valid, 44 Invalid, 18143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [536 Valid, 17607 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-24 03:51:08,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-02-24 03:51:08,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 250. [2022-02-24 03:51:08,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0163265306122449) internal successors, (249), 245 states have internal predecessors, (249), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:08,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 253 transitions. [2022-02-24 03:51:08,891 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 253 transitions. Word has length 244 [2022-02-24 03:51:08,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:08,891 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 253 transitions. [2022-02-24 03:51:08,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 144 states have (on average 1.6666666666666667) internal successors, (240), 143 states have internal predecessors, (240), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:08,892 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 253 transitions. [2022-02-24 03:51:08,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 250 [2022-02-24 03:51:08,892 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:08,892 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:08,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:51:08,893 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:08,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:08,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1660280179, now seen corresponding path program 47 times [2022-02-24 03:51:08,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:08,893 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1885849258] [2022-02-24 03:51:08,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:08,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:09,044 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:09,212 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:09,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:09,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:09,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:09,972 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:13,616 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:13,617 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1885849258] [2022-02-24 03:51:13,617 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1885849258] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:13,617 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:13,617 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-24 03:51:13,617 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645399795] [2022-02-24 03:51:13,617 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:13,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-24 03:51:13,617 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:13,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-24 03:51:13,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6122, Invalid=15340, Unknown=0, NotChecked=0, Total=21462 [2022-02-24 03:51:13,619 INFO L87 Difference]: Start difference. First operand 250 states and 253 transitions. Second operand has 147 states, 147 states have (on average 1.6666666666666667) internal successors, (245), 146 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:25,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:25,492 INFO L93 Difference]: Finished difference Result 497 states and 508 transitions. [2022-02-24 03:51:25,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-24 03:51:25,493 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.6666666666666667) internal successors, (245), 146 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 249 [2022-02-24 03:51:25,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:25,493 INFO L225 Difference]: With dead ends: 497 [2022-02-24 03:51:25,493 INFO L226 Difference]: Without dead ends: 255 [2022-02-24 03:51:25,497 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24068 ImplicationChecksByTransitivity, 10.2s TimeCoverageRelationStatistics Valid=18360, Invalid=66030, Unknown=0, NotChecked=0, Total=84390 [2022-02-24 03:51:25,497 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 496 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 18322 mSolverCounterSat, 451 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 496 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 18773 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 451 IncrementalHoareTripleChecker+Valid, 18322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:25,497 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [496 Valid, 29 Invalid, 18773 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [451 Valid, 18322 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-24 03:51:25,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2022-02-24 03:51:25,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 255. [2022-02-24 03:51:25,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 250 states have (on average 1.016) internal successors, (254), 250 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:25,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 258 transitions. [2022-02-24 03:51:25,506 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 258 transitions. Word has length 249 [2022-02-24 03:51:25,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:25,507 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 258 transitions. [2022-02-24 03:51:25,507 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.6666666666666667) internal successors, (245), 146 states have internal predecessors, (245), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:25,507 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 258 transitions. [2022-02-24 03:51:25,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-24 03:51:25,508 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:25,508 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:25,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:51:25,508 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:25,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:25,508 INFO L85 PathProgramCache]: Analyzing trace with hash -1550284390, now seen corresponding path program 48 times [2022-02-24 03:51:25,508 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:25,509 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925627344] [2022-02-24 03:51:25,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:25,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:25,652 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:25,791 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:25,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:26,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:26,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:26,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:30,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:30,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925627344] [2022-02-24 03:51:30,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925627344] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:30,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:30,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-02-24 03:51:30,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966893800] [2022-02-24 03:51:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:30,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-02-24 03:51:30,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:30,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-02-24 03:51:30,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6372, Invalid=15978, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:51:30,342 INFO L87 Difference]: Start difference. First operand 255 states and 258 transitions. Second operand has 150 states, 150 states have (on average 1.6666666666666667) internal successors, (250), 149 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:42,738 INFO L93 Difference]: Finished difference Result 507 states and 518 transitions. [2022-02-24 03:51:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 150 states. [2022-02-24 03:51:42,738 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 150 states have (on average 1.6666666666666667) internal successors, (250), 149 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-24 03:51:42,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:42,739 INFO L225 Difference]: With dead ends: 507 [2022-02-24 03:51:42,739 INFO L226 Difference]: Without dead ends: 260 [2022-02-24 03:51:42,742 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 400 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25084 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=19110, Invalid=68802, Unknown=0, NotChecked=0, Total=87912 [2022-02-24 03:51:42,743 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 307 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19175 mSolverCounterSat, 357 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 307 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 19532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 357 IncrementalHoareTripleChecker+Valid, 19175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:42,743 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [307 Valid, 49 Invalid, 19532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [357 Valid, 19175 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2022-02-24 03:51:42,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-24 03:51:42,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 260. [2022-02-24 03:51:42,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 255 states have (on average 1.0156862745098039) internal successors, (259), 255 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 263 transitions. [2022-02-24 03:51:42,751 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 263 transitions. Word has length 254 [2022-02-24 03:51:42,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:42,752 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 263 transitions. [2022-02-24 03:51:42,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 150 states have (on average 1.6666666666666667) internal successors, (250), 149 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:51:42,752 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 263 transitions. [2022-02-24 03:51:42,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-24 03:51:42,753 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:42,753 INFO L514 BasicCegarLoop]: trace histogram [99, 98, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:42,753 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:51:42,753 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:42,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:42,754 INFO L85 PathProgramCache]: Analyzing trace with hash -1045809665, now seen corresponding path program 49 times [2022-02-24 03:51:42,754 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:42,754 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011721101] [2022-02-24 03:51:42,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:42,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:42,910 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:43,069 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:43,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:43,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:43,874 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:47,744 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:47,744 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011721101] [2022-02-24 03:51:47,744 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011721101] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:47,744 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:47,744 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-24 03:51:47,744 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565325344] [2022-02-24 03:51:47,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:47,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-24 03:51:47,745 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:47,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-24 03:51:47,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6627, Invalid=16629, Unknown=0, NotChecked=0, Total=23256 [2022-02-24 03:51:47,747 INFO L87 Difference]: Start difference. First operand 260 states and 263 transitions. Second operand has 153 states, 153 states have (on average 1.6666666666666667) internal successors, (255), 152 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:00,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:00,630 INFO L93 Difference]: Finished difference Result 517 states and 528 transitions. [2022-02-24 03:52:00,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-24 03:52:00,632 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.6666666666666667) internal successors, (255), 152 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-02-24 03:52:00,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:00,632 INFO L225 Difference]: With dead ends: 517 [2022-02-24 03:52:00,632 INFO L226 Difference]: Without dead ends: 265 [2022-02-24 03:52:00,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 106 SyntacticMatches, 1 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26121 ImplicationChecksByTransitivity, 11.1s TimeCoverageRelationStatistics Valid=19875, Invalid=71631, Unknown=0, NotChecked=0, Total=91506 [2022-02-24 03:52:00,636 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 415 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 19974 mSolverCounterSat, 468 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 415 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 20442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 468 IncrementalHoareTripleChecker+Valid, 19974 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:00,636 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [415 Valid, 49 Invalid, 20442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [468 Valid, 19974 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 03:52:00,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-24 03:52:00,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 265. [2022-02-24 03:52:00,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0153846153846153) internal successors, (264), 260 states have internal predecessors, (264), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:00,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 268 transitions. [2022-02-24 03:52:00,645 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 268 transitions. Word has length 259 [2022-02-24 03:52:00,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:00,645 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 268 transitions. [2022-02-24 03:52:00,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.6666666666666667) internal successors, (255), 152 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:00,645 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 268 transitions. [2022-02-24 03:52:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2022-02-24 03:52:00,646 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:00,646 INFO L514 BasicCegarLoop]: trace histogram [101, 100, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:00,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:52:00,647 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:00,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:00,647 INFO L85 PathProgramCache]: Analyzing trace with hash 440184334, now seen corresponding path program 50 times [2022-02-24 03:52:00,647 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:00,647 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [781327572] [2022-02-24 03:52:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:00,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:00,812 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:00,968 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:00,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:01,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:01,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:01,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:05,815 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:05,815 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [781327572] [2022-02-24 03:52:05,815 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [781327572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:05,815 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:05,815 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-02-24 03:52:05,815 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189205855] [2022-02-24 03:52:05,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:05,816 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-02-24 03:52:05,816 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:05,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-02-24 03:52:05,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6887, Invalid=17293, Unknown=0, NotChecked=0, Total=24180 [2022-02-24 03:52:05,818 INFO L87 Difference]: Start difference. First operand 265 states and 268 transitions. Second operand has 156 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:19,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:19,247 INFO L93 Difference]: Finished difference Result 527 states and 538 transitions. [2022-02-24 03:52:19,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 156 states. [2022-02-24 03:52:19,251 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 264 [2022-02-24 03:52:19,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:19,252 INFO L225 Difference]: With dead ends: 527 [2022-02-24 03:52:19,252 INFO L226 Difference]: Without dead ends: 270 [2022-02-24 03:52:19,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 416 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 307 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27179 ImplicationChecksByTransitivity, 11.4s TimeCoverageRelationStatistics Valid=20655, Invalid=74517, Unknown=0, NotChecked=0, Total=95172 [2022-02-24 03:52:19,256 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 423 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 20785 mSolverCounterSat, 582 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 423 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 21367 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 582 IncrementalHoareTripleChecker+Valid, 20785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:19,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [423 Valid, 44 Invalid, 21367 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [582 Valid, 20785 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-24 03:52:19,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-24 03:52:19,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 270. [2022-02-24 03:52:19,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 265 states have (on average 1.0150943396226415) internal successors, (269), 265 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:19,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 273 transitions. [2022-02-24 03:52:19,265 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 273 transitions. Word has length 264 [2022-02-24 03:52:19,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:19,265 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 273 transitions. [2022-02-24 03:52:19,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 156 states have (on average 1.6666666666666667) internal successors, (260), 155 states have internal predecessors, (260), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:19,265 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 273 transitions. [2022-02-24 03:52:19,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-24 03:52:19,266 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:19,266 INFO L514 BasicCegarLoop]: trace histogram [103, 102, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:19,266 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:52:19,266 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:19,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:19,267 INFO L85 PathProgramCache]: Analyzing trace with hash -908827509, now seen corresponding path program 51 times [2022-02-24 03:52:19,267 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:19,267 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [116595603] [2022-02-24 03:52:19,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:19,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:19,445 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:19,602 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:20,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:20,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:20,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:24,625 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:24,626 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [116595603] [2022-02-24 03:52:24,626 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [116595603] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:24,626 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:24,626 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [159] imperfect sequences [] total 159 [2022-02-24 03:52:24,626 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529279719] [2022-02-24 03:52:24,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:24,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 159 states [2022-02-24 03:52:24,626 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:24,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 159 interpolants. [2022-02-24 03:52:24,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7152, Invalid=17970, Unknown=0, NotChecked=0, Total=25122 [2022-02-24 03:52:24,628 INFO L87 Difference]: Start difference. First operand 270 states and 273 transitions. Second operand has 159 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 158 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:38,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:38,707 INFO L93 Difference]: Finished difference Result 537 states and 548 transitions. [2022-02-24 03:52:38,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-24 03:52:38,708 INFO L78 Accepts]: Start accepts. Automaton has has 159 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 158 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-02-24 03:52:38,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:38,708 INFO L225 Difference]: With dead ends: 537 [2022-02-24 03:52:38,708 INFO L226 Difference]: Without dead ends: 275 [2022-02-24 03:52:38,713 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 110 SyntacticMatches, 1 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28258 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=21450, Invalid=77460, Unknown=0, NotChecked=0, Total=98910 [2022-02-24 03:52:38,713 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 855 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 21615 mSolverCounterSat, 1019 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 855 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 22634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1019 IncrementalHoareTripleChecker+Valid, 21615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:38,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [855 Valid, 29 Invalid, 22634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1019 Valid, 21615 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-24 03:52:38,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-24 03:52:38,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-02-24 03:52:38,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0148148148148148) internal successors, (274), 270 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:38,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 278 transitions. [2022-02-24 03:52:38,722 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 278 transitions. Word has length 269 [2022-02-24 03:52:38,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:38,722 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 278 transitions. [2022-02-24 03:52:38,723 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 159 states, 159 states have (on average 1.6666666666666667) internal successors, (265), 158 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:38,723 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 278 transitions. [2022-02-24 03:52:38,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-02-24 03:52:38,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:38,740 INFO L514 BasicCegarLoop]: trace histogram [105, 104, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:38,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:52:38,740 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:38,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:38,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1024107390, now seen corresponding path program 52 times [2022-02-24 03:52:38,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:38,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [594393143] [2022-02-24 03:52:38,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:38,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:38,901 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:39,020 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:39,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:39,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:39,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:44,230 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:44,231 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [594393143] [2022-02-24 03:52:44,231 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [594393143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:44,231 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:44,231 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-02-24 03:52:44,231 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514237578] [2022-02-24 03:52:44,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:44,231 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-24 03:52:44,231 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:44,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-24 03:52:44,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7422, Invalid=18660, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:52:44,234 INFO L87 Difference]: Start difference. First operand 275 states and 278 transitions. Second operand has 162 states, 162 states have (on average 1.6666666666666667) internal successors, (270), 161 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:58,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:58,671 INFO L93 Difference]: Finished difference Result 547 states and 558 transitions. [2022-02-24 03:52:58,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-02-24 03:52:58,672 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.6666666666666667) internal successors, (270), 161 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 274 [2022-02-24 03:52:58,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:58,672 INFO L225 Difference]: With dead ends: 547 [2022-02-24 03:52:58,673 INFO L226 Difference]: Without dead ends: 280 [2022-02-24 03:52:58,677 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 432 GetRequests, 111 SyntacticMatches, 2 SemanticMatches, 319 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29410 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=22260, Invalid=80460, Unknown=0, NotChecked=0, Total=102720 [2022-02-24 03:52:58,677 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 655 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 22336 mSolverCounterSat, 605 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 655 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 22941 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 605 IncrementalHoareTripleChecker+Valid, 22336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:58,678 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [655 Valid, 24 Invalid, 22941 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [605 Valid, 22336 Invalid, 0 Unknown, 0 Unchecked, 6.6s Time] [2022-02-24 03:52:58,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2022-02-24 03:52:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 280. [2022-02-24 03:52:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0145454545454546) internal successors, (279), 275 states have internal predecessors, (279), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:58,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 283 transitions. [2022-02-24 03:52:58,697 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 283 transitions. Word has length 274 [2022-02-24 03:52:58,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:58,698 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 283 transitions. [2022-02-24 03:52:58,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.6666666666666667) internal successors, (270), 161 states have internal predecessors, (270), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:52:58,698 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 283 transitions. [2022-02-24 03:52:58,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-02-24 03:52:58,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:58,699 INFO L514 BasicCegarLoop]: trace histogram [107, 106, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:58,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:52:58,699 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:58,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:58,699 INFO L85 PathProgramCache]: Analyzing trace with hash -428889833, now seen corresponding path program 53 times [2022-02-24 03:52:58,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:58,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1812528004] [2022-02-24 03:52:58,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:58,700 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:58,862 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:59,042 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:59,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:59,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:59,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:04,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:04,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1812528004] [2022-02-24 03:53:04,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1812528004] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:04,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:04,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [165] imperfect sequences [] total 165 [2022-02-24 03:53:04,467 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130996335] [2022-02-24 03:53:04,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:04,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 165 states [2022-02-24 03:53:04,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:04,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 165 interpolants. [2022-02-24 03:53:04,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7697, Invalid=19363, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 03:53:04,469 INFO L87 Difference]: Start difference. First operand 280 states and 283 transitions. Second operand has 165 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 164 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:19,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:19,443 INFO L93 Difference]: Finished difference Result 557 states and 568 transitions. [2022-02-24 03:53:19,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-24 03:53:19,443 INFO L78 Accepts]: Start accepts. Automaton has has 165 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 164 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-02-24 03:53:19,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:19,444 INFO L225 Difference]: With dead ends: 557 [2022-02-24 03:53:19,444 INFO L226 Difference]: Without dead ends: 285 [2022-02-24 03:53:19,448 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30479 ImplicationChecksByTransitivity, 12.8s TimeCoverageRelationStatistics Valid=23085, Invalid=83517, Unknown=0, NotChecked=0, Total=106602 [2022-02-24 03:53:19,449 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 994 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 23232 mSolverCounterSat, 509 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 994 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 23741 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 509 IncrementalHoareTripleChecker+Valid, 23232 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:19,449 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [994 Valid, 49 Invalid, 23741 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [509 Valid, 23232 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-24 03:53:19,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-02-24 03:53:19,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 285. [2022-02-24 03:53:19,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 285 states, 280 states have (on average 1.0142857142857142) internal successors, (284), 280 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:19,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 285 states to 285 states and 288 transitions. [2022-02-24 03:53:19,458 INFO L78 Accepts]: Start accepts. Automaton has 285 states and 288 transitions. Word has length 279 [2022-02-24 03:53:19,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:19,458 INFO L470 AbstractCegarLoop]: Abstraction has 285 states and 288 transitions. [2022-02-24 03:53:19,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 165 states, 165 states have (on average 1.6666666666666667) internal successors, (275), 164 states have internal predecessors, (275), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:19,458 INFO L276 IsEmpty]: Start isEmpty. Operand 285 states and 288 transitions. [2022-02-24 03:53:19,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-24 03:53:19,459 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:19,459 INFO L514 BasicCegarLoop]: trace histogram [109, 108, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:19,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:53:19,460 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:19,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:19,460 INFO L85 PathProgramCache]: Analyzing trace with hash 187127030, now seen corresponding path program 54 times [2022-02-24 03:53:19,460 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:19,460 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564527630] [2022-02-24 03:53:19,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:19,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:19,637 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:19,808 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:19,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:20,815 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:20,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:25,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:25,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564527630] [2022-02-24 03:53:25,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [564527630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:25,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:25,438 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-24 03:53:25,438 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363517977] [2022-02-24 03:53:25,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:25,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-24 03:53:25,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:25,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-24 03:53:25,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7977, Invalid=20079, Unknown=0, NotChecked=0, Total=28056 [2022-02-24 03:53:25,441 INFO L87 Difference]: Start difference. First operand 285 states and 288 transitions. Second operand has 168 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 167 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:41,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:41,062 INFO L93 Difference]: Finished difference Result 567 states and 578 transitions. [2022-02-24 03:53:41,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-24 03:53:41,062 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 167 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-24 03:53:41,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:41,063 INFO L225 Difference]: With dead ends: 567 [2022-02-24 03:53:41,063 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 03:53:41,067 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 116 SyntacticMatches, 1 SemanticMatches, 331 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31621 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=23925, Invalid=86631, Unknown=0, NotChecked=0, Total=110556 [2022-02-24 03:53:41,067 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 564 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 24268 mSolverCounterSat, 735 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 564 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 25003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 735 IncrementalHoareTripleChecker+Valid, 24268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:41,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [564 Valid, 64 Invalid, 25003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [735 Valid, 24268 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-24 03:53:41,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 03:53:41,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-02-24 03:53:41,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.0140350877192983) internal successors, (289), 285 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:41,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 293 transitions. [2022-02-24 03:53:41,077 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 293 transitions. Word has length 284 [2022-02-24 03:53:41,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:41,077 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 293 transitions. [2022-02-24 03:53:41,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.6666666666666667) internal successors, (280), 167 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:53:41,077 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 293 transitions. [2022-02-24 03:53:41,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-24 03:53:41,078 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:41,078 INFO L514 BasicCegarLoop]: trace histogram [111, 110, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:41,078 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:53:41,078 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:41,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:41,079 INFO L85 PathProgramCache]: Analyzing trace with hash -1195949149, now seen corresponding path program 55 times [2022-02-24 03:53:41,079 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:41,079 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1033543316] [2022-02-24 03:53:41,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:41,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:41,201 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:41,321 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:41,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:42,329 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:42,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:42,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:47,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:47,115 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1033543316] [2022-02-24 03:53:47,115 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1033543316] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:47,115 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:47,115 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [171] imperfect sequences [] total 171 [2022-02-24 03:53:47,115 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [582351885] [2022-02-24 03:53:47,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:47,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 171 states [2022-02-24 03:53:47,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:47,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 171 interpolants. [2022-02-24 03:53:47,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8262, Invalid=20808, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 03:53:47,118 INFO L87 Difference]: Start difference. First operand 290 states and 293 transitions. Second operand has 171 states, 171 states have (on average 1.6666666666666667) internal successors, (285), 170 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:03,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:03,379 INFO L93 Difference]: Finished difference Result 577 states and 588 transitions. [2022-02-24 03:54:03,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-24 03:54:03,380 INFO L78 Accepts]: Start accepts. Automaton has has 171 states, 171 states have (on average 1.6666666666666667) internal successors, (285), 170 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 289 [2022-02-24 03:54:03,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:03,381 INFO L225 Difference]: With dead ends: 577 [2022-02-24 03:54:03,381 INFO L226 Difference]: Without dead ends: 295 [2022-02-24 03:54:03,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 456 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32784 ImplicationChecksByTransitivity, 13.8s TimeCoverageRelationStatistics Valid=24780, Invalid=89802, Unknown=0, NotChecked=0, Total=114582 [2022-02-24 03:54:03,386 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 804 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 25161 mSolverCounterSat, 977 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 804 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26138 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 977 IncrementalHoareTripleChecker+Valid, 25161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:03,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [804 Valid, 59 Invalid, 26138 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [977 Valid, 25161 Invalid, 0 Unknown, 0 Unchecked, 7.5s Time] [2022-02-24 03:54:03,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 295 states. [2022-02-24 03:54:03,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 295 to 295. [2022-02-24 03:54:03,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.013793103448276) internal successors, (294), 290 states have internal predecessors, (294), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:03,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 298 transitions. [2022-02-24 03:54:03,395 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 298 transitions. Word has length 289 [2022-02-24 03:54:03,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:03,396 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 298 transitions. [2022-02-24 03:54:03,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 171 states, 171 states have (on average 1.6666666666666667) internal successors, (285), 170 states have internal predecessors, (285), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:03,396 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 298 transitions. [2022-02-24 03:54:03,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 295 [2022-02-24 03:54:03,397 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:03,397 INFO L514 BasicCegarLoop]: trace histogram [113, 112, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:03,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:54:03,397 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:03,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:03,397 INFO L85 PathProgramCache]: Analyzing trace with hash 469194602, now seen corresponding path program 56 times [2022-02-24 03:54:03,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:03,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2016475731] [2022-02-24 03:54:03,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:03,398 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:03,562 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:03,683 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:03,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:04,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:04,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:09,628 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:09,628 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2016475731] [2022-02-24 03:54:09,628 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2016475731] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:09,628 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:09,628 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-02-24 03:54:09,628 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418060975] [2022-02-24 03:54:09,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:09,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-02-24 03:54:09,629 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:09,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-02-24 03:54:09,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8552, Invalid=21550, Unknown=0, NotChecked=0, Total=30102 [2022-02-24 03:54:09,631 INFO L87 Difference]: Start difference. First operand 295 states and 298 transitions. Second operand has 174 states, 174 states have (on average 1.6666666666666667) internal successors, (290), 173 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:26,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:26,486 INFO L93 Difference]: Finished difference Result 587 states and 598 transitions. [2022-02-24 03:54:26,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-02-24 03:54:26,486 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.6666666666666667) internal successors, (290), 173 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 294 [2022-02-24 03:54:26,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:26,487 INFO L225 Difference]: With dead ends: 587 [2022-02-24 03:54:26,487 INFO L226 Difference]: Without dead ends: 300 [2022-02-24 03:54:26,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 120 SyntacticMatches, 1 SemanticMatches, 343 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33968 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=25650, Invalid=93030, Unknown=0, NotChecked=0, Total=118680 [2022-02-24 03:54:26,493 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 818 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 26083 mSolverCounterSat, 881 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 818 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 26964 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 881 IncrementalHoareTripleChecker+Valid, 26083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:26,493 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [818 Valid, 59 Invalid, 26964 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [881 Valid, 26083 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-02-24 03:54:26,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-02-24 03:54:26,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 300. [2022-02-24 03:54:26,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 295 states have (on average 1.0135593220338983) internal successors, (299), 295 states have internal predecessors, (299), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:26,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 303 transitions. [2022-02-24 03:54:26,529 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 303 transitions. Word has length 294 [2022-02-24 03:54:26,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:26,529 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 303 transitions. [2022-02-24 03:54:26,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.6666666666666667) internal successors, (290), 173 states have internal predecessors, (290), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 303 transitions. [2022-02-24 03:54:26,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-02-24 03:54:26,531 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:26,531 INFO L514 BasicCegarLoop]: trace histogram [115, 114, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:26,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:54:26,531 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:26,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:26,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1272548305, now seen corresponding path program 57 times [2022-02-24 03:54:26,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:26,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060572685] [2022-02-24 03:54:26,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:26,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:26,731 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:26,864 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:26,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:27,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:27,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:27,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:33,061 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:33,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060572685] [2022-02-24 03:54:33,061 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060572685] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:33,061 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:33,061 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [177] imperfect sequences [] total 177 [2022-02-24 03:54:33,061 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312550035] [2022-02-24 03:54:33,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:33,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 177 states [2022-02-24 03:54:33,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:33,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 177 interpolants. [2022-02-24 03:54:33,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8847, Invalid=22305, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 03:54:33,064 INFO L87 Difference]: Start difference. First operand 300 states and 303 transitions. Second operand has 177 states, 177 states have (on average 1.6666666666666667) internal successors, (295), 176 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:50,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:50,365 INFO L93 Difference]: Finished difference Result 597 states and 608 transitions. [2022-02-24 03:54:50,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-02-24 03:54:50,366 INFO L78 Accepts]: Start accepts. Automaton has has 177 states, 177 states have (on average 1.6666666666666667) internal successors, (295), 176 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-02-24 03:54:50,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:50,367 INFO L225 Difference]: With dead ends: 597 [2022-02-24 03:54:50,367 INFO L226 Difference]: Without dead ends: 305 [2022-02-24 03:54:50,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 472 GetRequests, 121 SyntacticMatches, 2 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35230 ImplicationChecksByTransitivity, 14.7s TimeCoverageRelationStatistics Valid=26535, Invalid=96315, Unknown=0, NotChecked=0, Total=122850 [2022-02-24 03:54:50,372 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 597 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 26843 mSolverCounterSat, 778 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 27621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 778 IncrementalHoareTripleChecker+Valid, 26843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:50,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [597 Valid, 54 Invalid, 27621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [778 Valid, 26843 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-24 03:54:50,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 305 states. [2022-02-24 03:54:50,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 305 to 305. [2022-02-24 03:54:50,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 300 states have (on average 1.0133333333333334) internal successors, (304), 300 states have internal predecessors, (304), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:50,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 308 transitions. [2022-02-24 03:54:50,382 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 308 transitions. Word has length 299 [2022-02-24 03:54:50,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:50,382 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 308 transitions. [2022-02-24 03:54:50,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 177 states, 177 states have (on average 1.6666666666666667) internal successors, (295), 176 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:54:50,383 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 308 transitions. [2022-02-24 03:54:50,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 305 [2022-02-24 03:54:50,384 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:50,384 INFO L514 BasicCegarLoop]: trace histogram [117, 116, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:50,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:54:50,384 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:50,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:50,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1045046238, now seen corresponding path program 58 times [2022-02-24 03:54:50,384 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:50,384 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2102032698] [2022-02-24 03:54:50,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:50,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:50,561 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:50,739 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:50,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:51,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:51,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:51,817 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:57,075 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:57,076 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2102032698] [2022-02-24 03:54:57,076 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2102032698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:57,076 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:57,076 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [180] imperfect sequences [] total 180 [2022-02-24 03:54:57,076 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318627565] [2022-02-24 03:54:57,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:57,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2022-02-24 03:54:57,076 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:57,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2022-02-24 03:54:57,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9147, Invalid=23073, Unknown=0, NotChecked=0, Total=32220 [2022-02-24 03:54:57,079 INFO L87 Difference]: Start difference. First operand 305 states and 308 transitions. Second operand has 180 states, 180 states have (on average 1.6666666666666667) internal successors, (300), 179 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:15,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:15,042 INFO L93 Difference]: Finished difference Result 607 states and 618 transitions. [2022-02-24 03:55:15,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-02-24 03:55:15,042 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.6666666666666667) internal successors, (300), 179 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 304 [2022-02-24 03:55:15,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:15,043 INFO L225 Difference]: With dead ends: 607 [2022-02-24 03:55:15,043 INFO L226 Difference]: Without dead ends: 310 [2022-02-24 03:55:15,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 480 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 355 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36457 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=27435, Invalid=99657, Unknown=0, NotChecked=0, Total=127092 [2022-02-24 03:55:15,047 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 846 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 27734 mSolverCounterSat, 792 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 846 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 28526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 792 IncrementalHoareTripleChecker+Valid, 27734 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:15,047 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [846 Valid, 34 Invalid, 28526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [792 Valid, 27734 Invalid, 0 Unknown, 0 Unchecked, 8.3s Time] [2022-02-24 03:55:15,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-24 03:55:15,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 310. [2022-02-24 03:55:15,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 305 states have (on average 1.0131147540983607) internal successors, (309), 305 states have internal predecessors, (309), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:15,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 313 transitions. [2022-02-24 03:55:15,057 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 313 transitions. Word has length 304 [2022-02-24 03:55:15,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:15,058 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 313 transitions. [2022-02-24 03:55:15,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.6666666666666667) internal successors, (300), 179 states have internal predecessors, (300), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:15,058 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 313 transitions. [2022-02-24 03:55:15,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 310 [2022-02-24 03:55:15,059 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:15,059 INFO L514 BasicCegarLoop]: trace histogram [119, 118, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:15,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:55:15,059 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:15,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:15,059 INFO L85 PathProgramCache]: Analyzing trace with hash -1166509381, now seen corresponding path program 59 times [2022-02-24 03:55:15,059 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:15,059 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2031380560] [2022-02-24 03:55:15,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:15,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:15,246 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:15,370 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:15,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:16,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:16,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:16,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:21,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:21,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2031380560] [2022-02-24 03:55:21,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2031380560] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:21,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:21,923 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [183] imperfect sequences [] total 183 [2022-02-24 03:55:21,923 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960645699] [2022-02-24 03:55:21,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:21,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 183 states [2022-02-24 03:55:21,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:21,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 183 interpolants. [2022-02-24 03:55:21,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9452, Invalid=23854, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 03:55:21,927 INFO L87 Difference]: Start difference. First operand 310 states and 313 transitions. Second operand has 183 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 182 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:40,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:40,524 INFO L93 Difference]: Finished difference Result 617 states and 628 transitions. [2022-02-24 03:55:40,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-02-24 03:55:40,525 INFO L78 Accepts]: Start accepts. Automaton has has 183 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 182 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 309 [2022-02-24 03:55:40,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:40,526 INFO L225 Difference]: With dead ends: 617 [2022-02-24 03:55:40,526 INFO L226 Difference]: Without dead ends: 315 [2022-02-24 03:55:40,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 125 SyntacticMatches, 2 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37705 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=28350, Invalid=103056, Unknown=0, NotChecked=0, Total=131406 [2022-02-24 03:55:40,531 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 856 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 28787 mSolverCounterSat, 1048 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 29835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1048 IncrementalHoareTripleChecker+Valid, 28787 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:40,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [856 Valid, 64 Invalid, 29835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1048 Valid, 28787 Invalid, 0 Unknown, 0 Unchecked, 8.6s Time] [2022-02-24 03:55:40,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2022-02-24 03:55:40,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 315. [2022-02-24 03:55:40,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 310 states have (on average 1.0129032258064516) internal successors, (314), 310 states have internal predecessors, (314), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:40,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 318 transitions. [2022-02-24 03:55:40,541 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 318 transitions. Word has length 309 [2022-02-24 03:55:40,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:40,542 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 318 transitions. [2022-02-24 03:55:40,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 183 states, 183 states have (on average 1.6666666666666667) internal successors, (305), 182 states have internal predecessors, (305), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:55:40,542 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 318 transitions. [2022-02-24 03:55:40,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 315 [2022-02-24 03:55:40,556 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:40,556 INFO L514 BasicCegarLoop]: trace histogram [121, 120, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:40,556 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:55:40,557 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:40,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:40,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1053063762, now seen corresponding path program 60 times [2022-02-24 03:55:40,557 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:40,557 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1542069339] [2022-02-24 03:55:40,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:40,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:40,744 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:40,925 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:40,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:42,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:42,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:47,751 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:47,751 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1542069339] [2022-02-24 03:55:47,751 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1542069339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:47,752 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:47,752 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [186] imperfect sequences [] total 186 [2022-02-24 03:55:47,752 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257435583] [2022-02-24 03:55:47,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:47,752 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-02-24 03:55:47,752 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:47,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-02-24 03:55:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9762, Invalid=24648, Unknown=0, NotChecked=0, Total=34410 [2022-02-24 03:55:47,755 INFO L87 Difference]: Start difference. First operand 315 states and 318 transitions. Second operand has 186 states, 186 states have (on average 1.6666666666666667) internal successors, (310), 185 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:06,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:06,921 INFO L93 Difference]: Finished difference Result 627 states and 638 transitions. [2022-02-24 03:56:06,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-02-24 03:56:06,922 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.6666666666666667) internal successors, (310), 185 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 314 [2022-02-24 03:56:06,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:06,923 INFO L225 Difference]: With dead ends: 627 [2022-02-24 03:56:06,923 INFO L226 Difference]: Without dead ends: 320 [2022-02-24 03:56:06,928 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 496 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 367 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38914 ImplicationChecksByTransitivity, 16.3s TimeCoverageRelationStatistics Valid=29280, Invalid=106512, Unknown=0, NotChecked=0, Total=135792 [2022-02-24 03:56:06,928 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 378 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 29791 mSolverCounterSat, 564 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 30355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 564 IncrementalHoareTripleChecker+Valid, 29791 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:06,929 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [378 Valid, 64 Invalid, 30355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [564 Valid, 29791 Invalid, 0 Unknown, 0 Unchecked, 8.9s Time] [2022-02-24 03:56:06,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 320 states. [2022-02-24 03:56:06,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 320 to 320. [2022-02-24 03:56:06,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 315 states have (on average 1.0126984126984127) internal successors, (319), 315 states have internal predecessors, (319), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 323 transitions. [2022-02-24 03:56:06,939 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 323 transitions. Word has length 314 [2022-02-24 03:56:06,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:06,939 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 323 transitions. [2022-02-24 03:56:06,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.6666666666666667) internal successors, (310), 185 states have internal predecessors, (310), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:06,940 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 323 transitions. [2022-02-24 03:56:06,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-02-24 03:56:06,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:06,942 INFO L514 BasicCegarLoop]: trace histogram [123, 122, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:06,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:56:06,942 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:06,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:06,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1213687993, now seen corresponding path program 61 times [2022-02-24 03:56:06,942 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:06,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308423698] [2022-02-24 03:56:06,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:06,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:07,086 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:07,270 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:08,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:14,269 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:14,269 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308423698] [2022-02-24 03:56:14,269 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [308423698] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:14,269 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:14,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [189] imperfect sequences [] total 189 [2022-02-24 03:56:14,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713241] [2022-02-24 03:56:14,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:14,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 189 states [2022-02-24 03:56:14,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:14,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 189 interpolants. [2022-02-24 03:56:14,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10077, Invalid=25455, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 03:56:14,273 INFO L87 Difference]: Start difference. First operand 320 states and 323 transitions. Second operand has 189 states, 189 states have (on average 1.6666666666666667) internal successors, (315), 188 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:33,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:33,951 INFO L93 Difference]: Finished difference Result 637 states and 648 transitions. [2022-02-24 03:56:33,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-02-24 03:56:33,951 INFO L78 Accepts]: Start accepts. Automaton has has 189 states, 189 states have (on average 1.6666666666666667) internal successors, (315), 188 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-02-24 03:56:33,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:33,952 INFO L225 Difference]: With dead ends: 637 [2022-02-24 03:56:33,952 INFO L226 Difference]: Without dead ends: 325 [2022-02-24 03:56:33,958 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 504 GetRequests, 129 SyntacticMatches, 2 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40264 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=30225, Invalid=110025, Unknown=0, NotChecked=0, Total=140250 [2022-02-24 03:56:33,958 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 886 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 30748 mSolverCounterSat, 1081 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 886 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 31829 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1081 IncrementalHoareTripleChecker+Valid, 30748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:33,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [886 Valid, 39 Invalid, 31829 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1081 Valid, 30748 Invalid, 0 Unknown, 0 Unchecked, 9.2s Time] [2022-02-24 03:56:33,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-24 03:56:33,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-02-24 03:56:33,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.0125) internal successors, (324), 320 states have internal predecessors, (324), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:33,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 328 transitions. [2022-02-24 03:56:33,969 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 328 transitions. Word has length 319 [2022-02-24 03:56:33,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:33,969 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 328 transitions. [2022-02-24 03:56:33,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 189 states, 189 states have (on average 1.6666666666666667) internal successors, (315), 188 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:56:33,969 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 328 transitions. [2022-02-24 03:56:33,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 325 [2022-02-24 03:56:33,970 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:33,970 INFO L514 BasicCegarLoop]: trace histogram [125, 124, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:33,970 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:56:33,971 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:33,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:33,971 INFO L85 PathProgramCache]: Analyzing trace with hash -775218490, now seen corresponding path program 62 times [2022-02-24 03:56:33,971 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:33,971 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1859840633] [2022-02-24 03:56:33,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:33,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:34,092 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:34,250 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:34,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:35,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:41,422 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:41,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1859840633] [2022-02-24 03:56:41,422 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1859840633] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:41,422 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:41,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [] total 192 [2022-02-24 03:56:41,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067573186] [2022-02-24 03:56:41,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:41,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-02-24 03:56:41,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:41,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-02-24 03:56:41,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10397, Invalid=26275, Unknown=0, NotChecked=0, Total=36672 [2022-02-24 03:56:41,425 INFO L87 Difference]: Start difference. First operand 325 states and 328 transitions. Second operand has 192 states, 192 states have (on average 1.6666666666666667) internal successors, (320), 191 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:01,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:01,667 INFO L93 Difference]: Finished difference Result 647 states and 658 transitions. [2022-02-24 03:57:01,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-02-24 03:57:01,667 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 192 states have (on average 1.6666666666666667) internal successors, (320), 191 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 324 [2022-02-24 03:57:01,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:01,668 INFO L225 Difference]: With dead ends: 647 [2022-02-24 03:57:01,668 INFO L226 Difference]: Without dead ends: 330 [2022-02-24 03:57:01,673 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 512 GetRequests, 132 SyntacticMatches, 1 SemanticMatches, 379 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41513 ImplicationChecksByTransitivity, 17.3s TimeCoverageRelationStatistics Valid=31185, Invalid=113595, Unknown=0, NotChecked=0, Total=144780 [2022-02-24 03:57:01,673 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 263 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 31600 mSolverCounterSat, 456 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 32056 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 456 IncrementalHoareTripleChecker+Valid, 31600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:01,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 44 Invalid, 32056 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [456 Valid, 31600 Invalid, 0 Unknown, 0 Unchecked, 9.3s Time] [2022-02-24 03:57:01,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2022-02-24 03:57:01,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 330. [2022-02-24 03:57:01,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 325 states have (on average 1.0123076923076924) internal successors, (329), 325 states have internal predecessors, (329), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:01,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 333 transitions. [2022-02-24 03:57:01,685 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 333 transitions. Word has length 324 [2022-02-24 03:57:01,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:01,685 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 333 transitions. [2022-02-24 03:57:01,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 192 states have (on average 1.6666666666666667) internal successors, (320), 191 states have internal predecessors, (320), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:01,685 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 333 transitions. [2022-02-24 03:57:01,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 330 [2022-02-24 03:57:01,686 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:01,686 INFO L514 BasicCegarLoop]: trace histogram [127, 126, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:01,686 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 03:57:01,686 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:01,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:01,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1039272403, now seen corresponding path program 63 times [2022-02-24 03:57:01,687 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:01,687 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436972563] [2022-02-24 03:57:01,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:01,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:01,888 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:02,111 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:02,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:03,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:03,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:03,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:57:09,544 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:09,545 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436972563] [2022-02-24 03:57:09,545 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [436972563] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:09,545 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:09,545 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [195] imperfect sequences [] total 195 [2022-02-24 03:57:09,545 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792118279] [2022-02-24 03:57:09,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:09,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 195 states [2022-02-24 03:57:09,545 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:09,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 195 interpolants. [2022-02-24 03:57:09,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10722, Invalid=27108, Unknown=0, NotChecked=0, Total=37830 [2022-02-24 03:57:09,548 INFO L87 Difference]: Start difference. First operand 330 states and 333 transitions. Second operand has 195 states, 195 states have (on average 1.6666666666666667) internal successors, (325), 194 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:30,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:30,569 INFO L93 Difference]: Finished difference Result 657 states and 668 transitions. [2022-02-24 03:57:30,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-02-24 03:57:30,569 INFO L78 Accepts]: Start accepts. Automaton has has 195 states, 195 states have (on average 1.6666666666666667) internal successors, (325), 194 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 329 [2022-02-24 03:57:30,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:30,570 INFO L225 Difference]: With dead ends: 657 [2022-02-24 03:57:30,570 INFO L226 Difference]: Without dead ends: 335 [2022-02-24 03:57:30,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 520 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42907 ImplicationChecksByTransitivity, 17.8s TimeCoverageRelationStatistics Valid=32160, Invalid=117222, Unknown=0, NotChecked=0, Total=149382 [2022-02-24 03:57:30,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 656 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 32609 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 656 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 33074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 32609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:30,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [656 Valid, 24 Invalid, 33074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 32609 Invalid, 0 Unknown, 0 Unchecked, 9.7s Time] [2022-02-24 03:57:30,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2022-02-24 03:57:30,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 335. [2022-02-24 03:57:30,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 330 states have (on average 1.0121212121212122) internal successors, (334), 330 states have internal predecessors, (334), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:30,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 338 transitions. [2022-02-24 03:57:30,587 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 338 transitions. Word has length 329 [2022-02-24 03:57:30,588 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:30,588 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 338 transitions. [2022-02-24 03:57:30,588 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 195 states, 195 states have (on average 1.6666666666666667) internal successors, (325), 194 states have internal predecessors, (325), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:57:30,588 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 338 transitions. [2022-02-24 03:57:30,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 335 [2022-02-24 03:57:30,589 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:30,589 INFO L514 BasicCegarLoop]: trace histogram [129, 128, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:30,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 03:57:30,589 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:30,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:30,590 INFO L85 PathProgramCache]: Analyzing trace with hash -142424774, now seen corresponding path program 64 times [2022-02-24 03:57:30,590 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:30,590 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1469948386] [2022-02-24 03:57:30,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:30,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:30,738 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:30,956 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:30,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:32,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:32,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:57:38,660 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:38,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1469948386] [2022-02-24 03:57:38,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1469948386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:38,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:38,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [198] imperfect sequences [] total 198 [2022-02-24 03:57:38,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532409452] [2022-02-24 03:57:38,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:38,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-02-24 03:57:38,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:38,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-02-24 03:57:38,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11052, Invalid=27954, Unknown=0, NotChecked=0, Total=39006 [2022-02-24 03:57:38,665 INFO L87 Difference]: Start difference. First operand 335 states and 338 transitions. Second operand has 198 states, 198 states have (on average 1.6666666666666667) internal successors, (330), 197 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:00,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:58:00,695 INFO L93 Difference]: Finished difference Result 667 states and 678 transitions. [2022-02-24 03:58:00,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 198 states. [2022-02-24 03:58:00,700 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 198 states have (on average 1.6666666666666667) internal successors, (330), 197 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 334 [2022-02-24 03:58:00,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:58:00,701 INFO L225 Difference]: With dead ends: 667 [2022-02-24 03:58:00,701 INFO L226 Difference]: Without dead ends: 340 [2022-02-24 03:58:00,708 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 528 GetRequests, 136 SyntacticMatches, 1 SemanticMatches, 391 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44196 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=33150, Invalid=120906, Unknown=0, NotChecked=0, Total=154056 [2022-02-24 03:58:00,708 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 929 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 33870 mSolverCounterSat, 997 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 8.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 929 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 34867 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 997 IncrementalHoareTripleChecker+Valid, 33870 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 10.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:58:00,711 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [929 Valid, 54 Invalid, 34867 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [997 Valid, 33870 Invalid, 0 Unknown, 0 Unchecked, 10.3s Time] [2022-02-24 03:58:00,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-24 03:58:00,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-02-24 03:58:00,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.0119402985074626) internal successors, (339), 335 states have internal predecessors, (339), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:00,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 343 transitions. [2022-02-24 03:58:00,721 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 343 transitions. Word has length 334 [2022-02-24 03:58:00,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:58:00,721 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 343 transitions. [2022-02-24 03:58:00,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 198 states have (on average 1.6666666666666667) internal successors, (330), 197 states have internal predecessors, (330), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:58:00,722 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 343 transitions. [2022-02-24 03:58:00,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-02-24 03:58:00,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:58:00,723 INFO L514 BasicCegarLoop]: trace histogram [131, 130, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:58:00,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 03:58:00,723 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:58:00,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:58:00,723 INFO L85 PathProgramCache]: Analyzing trace with hash 567284319, now seen corresponding path program 65 times [2022-02-24 03:58:00,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:58:00,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887031872] [2022-02-24 03:58:00,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:58:00,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:58:00,960 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:01,172 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:58:01,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:02,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:58:02,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:58:02,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:58:09,068 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:58:09,068 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887031872] [2022-02-24 03:58:09,068 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [887031872] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:58:09,068 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:58:09,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [201] imperfect sequences [] total 201 [2022-02-24 03:58:09,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724322123] [2022-02-24 03:58:09,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:58:09,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 201 states [2022-02-24 03:58:09,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:58:09,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 201 interpolants. [2022-02-24 03:58:09,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11387, Invalid=28813, Unknown=0, NotChecked=0, Total=40200 [2022-02-24 03:58:09,072 INFO L87 Difference]: Start difference. First operand 340 states and 343 transitions. Second operand has 201 states, 201 states have (on average 1.6666666666666667) internal successors, (335), 200 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)