/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_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:43:34,105 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:43:34,107 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:43:34,134 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:43:34,177 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:43:34,177 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:43:34,178 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:43:34,179 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 03:43:34,189 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:43:34,189 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:43:34,190 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:43:34,190 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:43:34,190 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:43:34,191 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:43:34,191 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:43:34,191 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:43:34,191 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:43:34,191 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:43:34,192 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:43:34,192 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:43:34,192 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:43:34,192 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:43:34,192 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:43:34,192 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:43:34,193 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:43:34,193 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:43:34,193 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:43:34,193 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:43:34,193 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:43:34,384 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:43:34,407 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:43:34,409 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:43:34,410 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:43:34,412 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:43:34,413 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-02-24 03:43:34,478 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5602abe/2e0133f10a95434e85f59587d5faebe4/FLAG69ed5e10b [2022-02-24 03:43:34,848 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:43:34,849 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/mono-crafted_1.c [2022-02-24 03:43:34,854 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5602abe/2e0133f10a95434e85f59587d5faebe4/FLAG69ed5e10b [2022-02-24 03:43:34,862 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1e5602abe/2e0133f10a95434e85f59587d5faebe4 [2022-02-24 03:43:34,864 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:43:34,865 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:43:34,866 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:43:34,866 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:43:34,868 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:43:34,869 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:43:34" (1/1) ... [2022-02-24 03:43:34,870 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3604c6e2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:34, skipping insertion in model container [2022-02-24 03:43:34,870 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:43:34" (1/1) ... [2022-02-24 03:43:34,875 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:43:34,882 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:43:34,977 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_1.c[318,331] [2022-02-24 03:43:35,000 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:43:35,006 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:43:35,018 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_1.c[318,331] [2022-02-24 03:43:35,020 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:43:35,028 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:43:35,029 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35 WrapperNode [2022-02-24 03:43:35,029 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:43:35,030 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:43:35,030 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:43:35,030 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:43:35,039 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,039 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,045 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,045 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,054 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,056 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,057 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,058 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:43:35,059 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:43:35,059 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:43:35,059 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:43:35,059 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (1/1) ... [2022-02-24 03:43:35,067 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:43:35,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:43:35,089 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 03:43:35,139 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 03:43:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:43:35,146 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:43:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:43:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:43:35,147 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:43:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:43:35,147 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:43:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:43:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:43:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:43:35,148 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:43:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:43:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:43:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:43:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:43:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:43:35,149 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:43:35,200 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:43:35,202 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:43:35,282 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:43:35,286 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:43:35,286 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-02-24 03:43:35,288 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:43:35 BoogieIcfgContainer [2022-02-24 03:43:35,288 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:43:35,289 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:43:35,289 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:43:35,292 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:43:35,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:43:34" (1/3) ... [2022-02-24 03:43:35,292 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6f14e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:43:35, skipping insertion in model container [2022-02-24 03:43:35,292 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:43:35" (2/3) ... [2022-02-24 03:43:35,293 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4b6f14e0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:43:35, skipping insertion in model container [2022-02-24 03:43:35,293 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:43:35" (3/3) ... [2022-02-24 03:43:35,294 INFO L111 eAbstractionObserver]: Analyzing ICFG mono-crafted_1.c [2022-02-24 03:43:35,297 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:43:35,297 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:43:35,328 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:43:35,333 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 03:43:35,333 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:43:35,342 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 03:43:35,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:43:35,347 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:35,347 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:35,348 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:35,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:35,352 INFO L85 PathProgramCache]: Analyzing trace with hash -1168619535, now seen corresponding path program 1 times [2022-02-24 03:43:35,358 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:35,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1852257920] [2022-02-24 03:43:35,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:35,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:35,409 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:43:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:35,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:35,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:35,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:35,542 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:35,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1852257920] [2022-02-24 03:43:35,543 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1852257920] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:35,543 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:35,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:43:35,544 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [400152368] [2022-02-24 03:43:35,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:35,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:43:35,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:35,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:43:35,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:43:35,597 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 03:43:35,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:35,635 INFO L93 Difference]: Finished difference Result 34 states and 42 transitions. [2022-02-24 03:43:35,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:43:35,637 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 03:43:35,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:35,641 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:43:35,641 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 03:43:35,653 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 03:43:35,655 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 03:43:35,656 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 03:43:35,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 03:43:35,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 03:43:35,692 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 03:43:35,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2022-02-24 03:43:35,694 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 12 [2022-02-24 03:43:35,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:35,694 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2022-02-24 03:43:35,694 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 03:43:35,694 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2022-02-24 03:43:35,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2022-02-24 03:43:35,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:35,695 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:35,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:43:35,695 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:35,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:35,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1458605129, now seen corresponding path program 1 times [2022-02-24 03:43:35,696 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:35,696 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [316980590] [2022-02-24 03:43:35,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:35,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:35,698 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:43:35,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:35,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:35,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:35,792 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 03:43:35,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:35,793 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [316980590] [2022-02-24 03:43:35,793 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [316980590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:35,793 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:35,793 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:43:35,793 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381698604] [2022-02-24 03:43:35,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:35,794 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:43:35,794 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:35,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:43:35,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:43:35,795 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 03:43:35,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:35,838 INFO L93 Difference]: Finished difference Result 24 states and 30 transitions. [2022-02-24 03:43:35,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:43:35,840 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 03:43:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:35,841 INFO L225 Difference]: With dead ends: 24 [2022-02-24 03:43:35,841 INFO L226 Difference]: Without dead ends: 16 [2022-02-24 03:43:35,841 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 03:43:35,842 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 03:43:35,843 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 03:43:35,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2022-02-24 03:43:35,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2022-02-24 03:43:35,847 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 03:43:35,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2022-02-24 03:43:35,847 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2022-02-24 03:43:35,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:35,848 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2022-02-24 03:43:35,848 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 03:43:35,848 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2022-02-24 03:43:35,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:43:35,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:35,848 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:35,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:43:35,849 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:35,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:35,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1316432198, now seen corresponding path program 1 times [2022-02-24 03:43:35,849 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:35,849 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702964548] [2022-02-24 03:43:35,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:35,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:35,947 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:43:35,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:36,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:36,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:36,019 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:36,050 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:36,051 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702964548] [2022-02-24 03:43:36,051 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [702964548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:36,051 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:36,051 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:43:36,051 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602511003] [2022-02-24 03:43:36,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:36,052 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:43:36,052 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:36,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:43:36,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:43:36,053 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 03:43:36,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:36,126 INFO L93 Difference]: Finished difference Result 26 states and 32 transitions. [2022-02-24 03:43:36,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:43:36,126 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 03:43:36,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:36,128 INFO L225 Difference]: With dead ends: 26 [2022-02-24 03:43:36,128 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:43:36,129 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:43:36,136 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 03:43:36,136 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 03:43:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:43:36,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2022-02-24 03:43:36,141 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 03:43:36,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2022-02-24 03:43:36,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2022-02-24 03:43:36,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:36,142 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2022-02-24 03:43:36,142 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 03:43:36,142 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2022-02-24 03:43:36,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 03:43:36,142 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:36,143 INFO L514 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:36,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:43:36,143 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:36,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:36,143 INFO L85 PathProgramCache]: Analyzing trace with hash -1342594849, now seen corresponding path program 1 times [2022-02-24 03:43:36,143 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:36,144 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [383681716] [2022-02-24 03:43:36,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:36,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:36,431 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:39,600 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:39,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:39,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:39,744 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 03:43:39,883 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:39,883 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [383681716] [2022-02-24 03:43:39,883 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [383681716] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:39,883 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:39,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:43:39,884 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [943829623] [2022-02-24 03:43:39,884 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:39,885 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:43:39,885 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:39,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:43:39,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:43:39,887 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 03:43:40,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:40,019 INFO L93 Difference]: Finished difference Result 39 states and 50 transitions. [2022-02-24 03:43:40,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:43:40,020 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 03:43:40,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:40,021 INFO L225 Difference]: With dead ends: 39 [2022-02-24 03:43:40,021 INFO L226 Difference]: Without dead ends: 27 [2022-02-24 03:43:40,022 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:43:40,029 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:40,030 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 39 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:43:40,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2022-02-24 03:43:40,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2022-02-24 03:43:40,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:40,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2022-02-24 03:43:40,039 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2022-02-24 03:43:40,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:40,040 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2022-02-24 03:43:40,040 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 03:43:40,041 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2022-02-24 03:43:40,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2022-02-24 03:43:40,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:40,041 INFO L514 BasicCegarLoop]: trace histogram [4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:40,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:43:40,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:40,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:40,042 INFO L85 PathProgramCache]: Analyzing trace with hash -510493847, now seen corresponding path program 2 times [2022-02-24 03:43:40,042 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:40,042 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635966245] [2022-02-24 03:43:40,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:40,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:40,208 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:40,374 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:40,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:40,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:40,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:40,475 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 03:43:40,576 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:40,576 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635966245] [2022-02-24 03:43:40,576 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [635966245] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:40,576 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:40,576 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:43:40,577 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1898855753] [2022-02-24 03:43:40,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:40,577 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:43:40,577 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:40,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:43:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:43:40,578 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:40,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:40,727 INFO L93 Difference]: Finished difference Result 43 states and 53 transitions. [2022-02-24 03:43:40,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:43:40,727 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 22 [2022-02-24 03:43:40,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:40,728 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:43:40,728 INFO L226 Difference]: Without dead ends: 30 [2022-02-24 03:43:40,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=319, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:43:40,729 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 121 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:40,729 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [22 Valid, 39 Invalid, 121 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:43:40,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-24 03:43:40,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2022-02-24 03:43:40,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.2) internal successors, (30), 25 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:40,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2022-02-24 03:43:40,733 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 22 [2022-02-24 03:43:40,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:40,733 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2022-02-24 03:43:40,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.6363636363636365) internal successors, (18), 10 states have internal predecessors, (18), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:40,733 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2022-02-24 03:43:40,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 03:43:40,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:40,734 INFO L514 BasicCegarLoop]: trace histogram [5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:40,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:43:40,734 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:40,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:40,734 INFO L85 PathProgramCache]: Analyzing trace with hash 32415221, now seen corresponding path program 3 times [2022-02-24 03:43:40,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:40,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881287519] [2022-02-24 03:43:40,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:40,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:40,880 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:41,039 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:41,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:41,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:41,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:41,205 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:41,205 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881287519] [2022-02-24 03:43:41,205 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881287519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:41,205 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:41,205 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:43:41,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073739834] [2022-02-24 03:43:41,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:41,206 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:43:41,206 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:41,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:43:41,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=98, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:43:41,207 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:41,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:41,379 INFO L93 Difference]: Finished difference Result 53 states and 69 transitions. [2022-02-24 03:43:41,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:43:41,379 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 03:43:41,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:41,382 INFO L225 Difference]: With dead ends: 53 [2022-02-24 03:43:41,382 INFO L226 Difference]: Without dead ends: 39 [2022-02-24 03:43:41,383 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=338, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:43:41,384 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 30 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 132 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:41,384 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [30 Valid, 34 Invalid, 132 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:43:41,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2022-02-24 03:43:41,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 31. [2022-02-24 03:43:41,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:41,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2022-02-24 03:43:41,394 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 25 [2022-02-24 03:43:41,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:41,395 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2022-02-24 03:43:41,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 12 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:41,395 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2022-02-24 03:43:41,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2022-02-24 03:43:41,395 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:41,395 INFO L514 BasicCegarLoop]: trace histogram [7, 6, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:41,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:43:41,396 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:41,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:41,396 INFO L85 PathProgramCache]: Analyzing trace with hash -1271041704, now seen corresponding path program 4 times [2022-02-24 03:43:41,396 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:41,396 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [100168368] [2022-02-24 03:43:41,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:41,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:41,558 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:41,705 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:41,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:41,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:41,818 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 03:43:41,940 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:41,940 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [100168368] [2022-02-24 03:43:41,940 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [100168368] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:41,940 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:41,941 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:43:41,941 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206110854] [2022-02-24 03:43:41,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:41,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:43:41,941 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:41,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:43:41,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=226, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:43:41,942 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:42,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:42,215 INFO L93 Difference]: Finished difference Result 69 states and 80 transitions. [2022-02-24 03:43:42,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:43:42,215 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 30 [2022-02-24 03:43:42,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:42,216 INFO L225 Difference]: With dead ends: 69 [2022-02-24 03:43:42,216 INFO L226 Difference]: Without dead ends: 46 [2022-02-24 03:43:42,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:43:42,217 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 40 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 184 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:42,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 34 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 184 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:43:42,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-02-24 03:43:42,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2022-02-24 03:43:42,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 41 states have internal predecessors, (46), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:42,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2022-02-24 03:43:42,222 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 30 [2022-02-24 03:43:42,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:42,222 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2022-02-24 03:43:42,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 15 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:42,223 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2022-02-24 03:43:42,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 03:43:42,223 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:42,223 INFO L514 BasicCegarLoop]: trace histogram [8, 7, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:42,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:43:42,223 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:42,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:42,224 INFO L85 PathProgramCache]: Analyzing trace with hash 1699044070, now seen corresponding path program 5 times [2022-02-24 03:43:42,224 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:42,224 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [486034399] [2022-02-24 03:43:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:42,224 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:42,339 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:42,491 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:42,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:42,649 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:42,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:42,657 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 03:43:42,845 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:42,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [486034399] [2022-02-24 03:43:42,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [486034399] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:42,846 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:42,846 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:43:42,846 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029834759] [2022-02-24 03:43:42,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:42,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:43:42,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:42,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:43:42,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2022-02-24 03:43:42,850 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:43,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:43,219 INFO L93 Difference]: Finished difference Result 73 states and 83 transitions. [2022-02-24 03:43:43,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:43:43,225 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 03:43:43,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:43,225 INFO L225 Difference]: With dead ends: 73 [2022-02-24 03:43:43,225 INFO L226 Difference]: Without dead ends: 49 [2022-02-24 03:43:43,226 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:43:43,227 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 42 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 231 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 276 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:43,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 39 Invalid, 276 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 231 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:43:43,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2022-02-24 03:43:43,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2022-02-24 03:43:43,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 44 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 03:43:43,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 53 transitions. [2022-02-24 03:43:43,232 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 53 transitions. Word has length 33 [2022-02-24 03:43:43,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:43,232 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 53 transitions. [2022-02-24 03:43:43,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.6111111111111112) internal successors, (29), 17 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:43,233 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 53 transitions. [2022-02-24 03:43:43,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-02-24 03:43:43,233 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:43,233 INFO L514 BasicCegarLoop]: trace histogram [9, 8, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:43,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:43:43,233 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:43,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:43,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1018713474, now seen corresponding path program 6 times [2022-02-24 03:43:43,234 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:43,234 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1839648100] [2022-02-24 03:43:43,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:43,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:43,376 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:43,524 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:43,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:43,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:43,882 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:43,882 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1839648100] [2022-02-24 03:43:43,882 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1839648100] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:43,882 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:43,883 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:43:43,883 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478640919] [2022-02-24 03:43:43,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:43,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:43:43,883 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:43,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:43:43,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=333, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:43:43,884 INFO L87 Difference]: Start difference. First operand 49 states and 53 transitions. Second operand has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:44,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:44,260 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2022-02-24 03:43:44,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:43:44,260 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 36 [2022-02-24 03:43:44,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:44,261 INFO L225 Difference]: With dead ends: 77 [2022-02-24 03:43:44,261 INFO L226 Difference]: Without dead ends: 52 [2022-02-24 03:43:44,262 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=444, Invalid=1116, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:43:44,262 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 68 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 266 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 342 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 266 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:44,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 34 Invalid, 342 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 266 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:43:44,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2022-02-24 03:43:44,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2022-02-24 03:43:44,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:44,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 56 transitions. [2022-02-24 03:43:44,268 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 56 transitions. Word has length 36 [2022-02-24 03:43:44,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:44,268 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 56 transitions. [2022-02-24 03:43:44,268 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.6) internal successors, (32), 19 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:44,268 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 56 transitions. [2022-02-24 03:43:44,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 03:43:44,269 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:44,269 INFO L514 BasicCegarLoop]: trace histogram [10, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:44,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:43:44,269 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:44,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:44,269 INFO L85 PathProgramCache]: Analyzing trace with hash -1339954244, now seen corresponding path program 7 times [2022-02-24 03:43:44,269 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:44,269 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146684867] [2022-02-24 03:43:44,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:44,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:44,428 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:44,560 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:44,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:44,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:44,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:44,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:44,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:44,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146684867] [2022-02-24 03:43:44,830 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146684867] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:44,830 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:44,830 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:43:44,830 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127936893] [2022-02-24 03:43:44,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:44,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:43:44,831 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:44,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:43:44,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=295, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:43:44,831 INFO L87 Difference]: Start difference. First operand 52 states and 56 transitions. Second operand has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 03:43:45,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:45,202 INFO L93 Difference]: Finished difference Result 89 states and 107 transitions. [2022-02-24 03:43:45,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:43:45,203 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 03:43:45,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:45,203 INFO L225 Difference]: With dead ends: 89 [2022-02-24 03:43:45,203 INFO L226 Difference]: Without dead ends: 63 [2022-02-24 03:43:45,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 433 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=495, Invalid=1145, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:43:45,204 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 254 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 254 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:45,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 29 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 254 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:43:45,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-02-24 03:43:45,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 45. [2022-02-24 03:43:45,209 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 03:43:45,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 48 transitions. [2022-02-24 03:43:45,209 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 48 transitions. Word has length 39 [2022-02-24 03:43:45,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:45,209 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 48 transitions. [2022-02-24 03:43:45,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.5909090909090908) internal successors, (35), 21 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 03:43:45,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 48 transitions. [2022-02-24 03:43:45,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:43:45,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:45,210 INFO L514 BasicCegarLoop]: trace histogram [12, 11, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:45,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:43:45,210 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:45,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:45,211 INFO L85 PathProgramCache]: Analyzing trace with hash 2093339377, now seen corresponding path program 8 times [2022-02-24 03:43:45,211 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:45,211 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1748102259] [2022-02-24 03:43:45,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:45,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:45,361 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:45,515 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:45,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:45,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:45,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:45,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:45,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:45,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1748102259] [2022-02-24 03:43:45,938 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1748102259] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:45,938 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:45,938 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:43:45,938 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473002433] [2022-02-24 03:43:45,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:45,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:43:45,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:45,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:43:45,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=501, Unknown=0, NotChecked=0, Total=756 [2022-02-24 03:43:45,939 INFO L87 Difference]: Start difference. First operand 45 states and 48 transitions. Second operand has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 03:43:46,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:46,421 INFO L93 Difference]: Finished difference Result 107 states and 118 transitions. [2022-02-24 03:43:46,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:43:46,421 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 03:43:46,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:46,422 INFO L225 Difference]: With dead ends: 107 [2022-02-24 03:43:46,422 INFO L226 Difference]: Without dead ends: 70 [2022-02-24 03:43:46,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=676, Invalid=1774, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:43:46,423 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 436 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 514 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:46,424 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 54 Invalid, 514 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 436 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:43:46,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2022-02-24 03:43:46,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2022-02-24 03:43:46,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0769230769230769) internal successors, (70), 65 states have internal predecessors, (70), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:46,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2022-02-24 03:43:46,430 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 44 [2022-02-24 03:43:46,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:46,430 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2022-02-24 03:43:46,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.6) internal successors, (40), 24 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 03:43:46,431 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2022-02-24 03:43:46,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:43:46,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:46,431 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:46,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:43:46,431 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:46,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:46,432 INFO L85 PathProgramCache]: Analyzing trace with hash -1953083091, now seen corresponding path program 9 times [2022-02-24 03:43:46,432 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:46,432 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1440194193] [2022-02-24 03:43:46,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:46,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:46,580 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:46,725 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:46,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:46,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:46,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:46,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:47,172 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:47,172 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1440194193] [2022-02-24 03:43:47,173 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1440194193] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:47,173 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:47,173 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:43:47,173 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2066475290] [2022-02-24 03:43:47,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:47,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:43:47,173 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:47,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:43:47,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=585, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:43:47,174 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:47,776 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:47,776 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-02-24 03:43:47,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:43:47,776 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-24 03:43:47,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:47,777 INFO L225 Difference]: With dead ends: 111 [2022-02-24 03:43:47,777 INFO L226 Difference]: Without dead ends: 73 [2022-02-24 03:43:47,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=780, Invalid=2082, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:43:47,778 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 478 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:47,779 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 34 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 478 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:43:47,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-02-24 03:43:47,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2022-02-24 03:43:47,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0735294117647058) internal successors, (73), 68 states have internal predecessors, (73), 3 states have call successors, (3), 3 states 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 03:43:47,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 77 transitions. [2022-02-24 03:43:47,787 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 77 transitions. Word has length 47 [2022-02-24 03:43:47,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:47,787 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 77 transitions. [2022-02-24 03:43:47,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.5925925925925926) internal successors, (43), 26 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:47,788 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 77 transitions. [2022-02-24 03:43:47,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:43:47,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:47,788 INFO L514 BasicCegarLoop]: trace histogram [14, 13, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:47,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:43:47,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:47,789 INFO L85 PathProgramCache]: Analyzing trace with hash 609078107, now seen corresponding path program 10 times [2022-02-24 03:43:47,789 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:47,789 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [232759002] [2022-02-24 03:43:47,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:47,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:47,906 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:48,045 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:48,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:48,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:48,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:48,484 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:48,484 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [232759002] [2022-02-24 03:43:48,484 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [232759002] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:48,484 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:48,484 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:43:48,484 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217164275] [2022-02-24 03:43:48,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:48,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:43:48,485 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:48,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:43:48,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=654, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:43:48,486 INFO L87 Difference]: Start difference. First operand 73 states and 77 transitions. Second operand has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:49,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:49,110 INFO L93 Difference]: Finished difference Result 115 states and 125 transitions. [2022-02-24 03:43:49,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:43:49,113 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-24 03:43:49,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:49,113 INFO L225 Difference]: With dead ends: 115 [2022-02-24 03:43:49,113 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 03:43:49,114 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=913, Invalid=2393, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 03:43:49,115 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 97 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:49,115 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 39 Invalid, 645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:43:49,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 03:43:49,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2022-02-24 03:43:49,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:49,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2022-02-24 03:43:49,122 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 50 [2022-02-24 03:43:49,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:49,122 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2022-02-24 03:43:49,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 28 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:49,123 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2022-02-24 03:43:49,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:43:49,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:49,123 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:49,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:43:49,123 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:49,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:49,124 INFO L85 PathProgramCache]: Analyzing trace with hash 1481229763, now seen corresponding path program 11 times [2022-02-24 03:43:49,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:49,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672890187] [2022-02-24 03:43:49,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:49,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:49,302 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:49,448 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:49,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:49,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:49,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:49,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:49,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:49,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672890187] [2022-02-24 03:43:49,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [672890187] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:49,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:49,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:43:49,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468263498] [2022-02-24 03:43:49,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:49,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:43:49,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:49,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:43:49,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=384, Invalid=738, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:43:49,902 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:50,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:50,577 INFO L93 Difference]: Finished difference Result 119 states and 129 transitions. [2022-02-24 03:43:50,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:43:50,578 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-24 03:43:50,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:50,578 INFO L225 Difference]: With dead ends: 119 [2022-02-24 03:43:50,579 INFO L226 Difference]: Without dead ends: 79 [2022-02-24 03:43:50,580 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1045, Invalid=2737, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:43:50,580 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 82 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 589 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 679 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 589 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:50,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 24 Invalid, 679 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 589 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:43:50,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2022-02-24 03:43:50,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2022-02-24 03:43:50,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.0675675675675675) internal successors, (79), 74 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 03:43:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 83 transitions. [2022-02-24 03:43:50,586 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 83 transitions. Word has length 53 [2022-02-24 03:43:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:50,586 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 83 transitions. [2022-02-24 03:43:50,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.5806451612903225) internal successors, (49), 30 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:50,587 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 83 transitions. [2022-02-24 03:43:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:43:50,587 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:50,587 INFO L514 BasicCegarLoop]: trace histogram [16, 15, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:50,587 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:43:50,587 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:50,588 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:50,588 INFO L85 PathProgramCache]: Analyzing trace with hash -53251643, now seen corresponding path program 12 times [2022-02-24 03:43:50,588 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:50,588 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [17981744] [2022-02-24 03:43:50,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:50,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:50,730 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:50,868 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:50,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:51,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:51,083 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 03:43:51,389 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:51,389 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [17981744] [2022-02-24 03:43:51,389 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [17981744] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:51,389 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:51,389 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:43:51,389 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146426062] [2022-02-24 03:43:51,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:51,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:43:51,390 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:51,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:43:51,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=827, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:43:51,390 INFO L87 Difference]: Start difference. First operand 79 states and 83 transitions. Second operand has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:52,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:52,148 INFO L93 Difference]: Finished difference Result 123 states and 133 transitions. [2022-02-24 03:43:52,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:43:52,148 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-24 03:43:52,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:52,149 INFO L225 Difference]: With dead ends: 123 [2022-02-24 03:43:52,149 INFO L226 Difference]: Without dead ends: 82 [2022-02-24 03:43:52,150 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1186, Invalid=3104, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:43:52,150 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 784 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:52,150 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 49 Invalid, 784 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:43:52,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2022-02-24 03:43:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2022-02-24 03:43:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 3 states have call successors, (3), 3 states 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 03:43:52,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 86 transitions. [2022-02-24 03:43:52,156 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 86 transitions. Word has length 56 [2022-02-24 03:43:52,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:52,156 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 86 transitions. [2022-02-24 03:43:52,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.5757575757575757) internal successors, (52), 32 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:52,157 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 86 transitions. [2022-02-24 03:43:52,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:43:52,157 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:52,157 INFO L514 BasicCegarLoop]: trace histogram [17, 16, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:52,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:43:52,157 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:52,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:52,158 INFO L85 PathProgramCache]: Analyzing trace with hash -748782503, now seen corresponding path program 13 times [2022-02-24 03:43:52,158 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:52,158 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294518269] [2022-02-24 03:43:52,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:52,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:52,319 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:52,467 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:52,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:52,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:52,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:53,023 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:53,023 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294518269] [2022-02-24 03:43:53,023 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [294518269] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:53,023 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:53,023 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:43:53,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [169157021] [2022-02-24 03:43:53,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:53,024 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:43:53,024 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:53,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:43:53,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=485, Invalid=921, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:43:53,024 INFO L87 Difference]: Start difference. First operand 82 states and 86 transitions. Second operand has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 03:43:53,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:53,841 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2022-02-24 03:43:53,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:43:53,841 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 03:43:53,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:53,842 INFO L225 Difference]: With dead ends: 127 [2022-02-24 03:43:53,842 INFO L226 Difference]: Without dead ends: 85 [2022-02-24 03:43:53,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1395 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1336, Invalid=3494, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:43:53,843 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 90 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 748 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:53,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 34 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 748 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:43:53,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2022-02-24 03:43:53,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2022-02-24 03:43:53,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.0625) internal successors, (85), 80 states have internal predecessors, (85), 3 states have call successors, (3), 3 states 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 03:43:53,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 89 transitions. [2022-02-24 03:43:53,849 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 89 transitions. Word has length 59 [2022-02-24 03:43:53,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:53,850 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 89 transitions. [2022-02-24 03:43:53,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.5714285714285714) internal successors, (55), 34 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 03:43:53,850 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 89 transitions. [2022-02-24 03:43:53,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:43:53,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:53,850 INFO L514 BasicCegarLoop]: trace histogram [18, 17, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:53,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:43:53,850 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:53,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:53,851 INFO L85 PathProgramCache]: Analyzing trace with hash -1129781713, now seen corresponding path program 14 times [2022-02-24 03:43:53,851 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:53,851 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [782847856] [2022-02-24 03:43:53,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:53,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:53,995 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:54,137 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:54,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:54,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:54,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:54,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:54,666 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:54,666 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [782847856] [2022-02-24 03:43:54,666 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [782847856] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:54,666 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:54,666 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:43:54,666 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307044004] [2022-02-24 03:43:54,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:54,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:43:54,667 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:54,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:43:54,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:43:54,668 INFO L87 Difference]: Start difference. First operand 85 states and 89 transitions. Second operand has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:55,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:55,383 INFO L93 Difference]: Finished difference Result 131 states and 141 transitions. [2022-02-24 03:43:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:43:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-24 03:43:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:55,384 INFO L225 Difference]: With dead ends: 131 [2022-02-24 03:43:55,384 INFO L226 Difference]: Without dead ends: 88 [2022-02-24 03:43:55,385 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1568 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1495, Invalid=3907, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:43:55,386 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 819 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 904 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 819 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:55,386 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 34 Invalid, 904 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 819 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:43:55,387 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2022-02-24 03:43:55,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2022-02-24 03:43:55,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0602409638554218) internal successors, (88), 83 states have internal predecessors, (88), 3 states have call successors, (3), 3 states 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 03:43:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2022-02-24 03:43:55,396 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 62 [2022-02-24 03:43:55,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:55,396 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2022-02-24 03:43:55,396 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5675675675675675) internal successors, (58), 36 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:55,396 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2022-02-24 03:43:55,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 03:43:55,401 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:55,401 INFO L514 BasicCegarLoop]: trace histogram [19, 18, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:55,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:43:55,401 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:55,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:55,402 INFO L85 PathProgramCache]: Analyzing trace with hash 421680367, now seen corresponding path program 15 times [2022-02-24 03:43:55,402 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:55,402 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1101512020] [2022-02-24 03:43:55,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:55,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:55,562 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:55,709 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:55,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:55,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:56,415 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:56,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1101512020] [2022-02-24 03:43:56,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1101512020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:56,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:56,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:43:56,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395112240] [2022-02-24 03:43:56,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:56,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:43:56,416 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:56,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:43:56,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=582, Invalid=1140, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 03:43:56,417 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 38 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:57,285 INFO L93 Difference]: Finished difference Result 135 states and 145 transitions. [2022-02-24 03:43:57,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:43:57,285 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 38 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-24 03:43:57,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:57,289 INFO L225 Difference]: With dead ends: 135 [2022-02-24 03:43:57,289 INFO L226 Difference]: Without dead ends: 91 [2022-02-24 03:43:57,291 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1744 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1647, Invalid=4359, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:43:57,291 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 121 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 133 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1049 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 133 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:57,292 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 34 Invalid, 1049 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [133 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:43:57,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-02-24 03:43:57,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2022-02-24 03:43:57,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.058139534883721) internal successors, (91), 86 states have internal predecessors, (91), 3 states have call successors, (3), 3 states 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 03:43:57,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2022-02-24 03:43:57,304 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 65 [2022-02-24 03:43:57,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:57,305 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2022-02-24 03:43:57,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.564102564102564) internal successors, (61), 38 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:57,305 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2022-02-24 03:43:57,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:43:57,305 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:57,305 INFO L514 BasicCegarLoop]: trace histogram [20, 19, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:57,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:43:57,306 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:57,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:57,306 INFO L85 PathProgramCache]: Analyzing trace with hash -1688188775, now seen corresponding path program 16 times [2022-02-24 03:43:57,306 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:57,306 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1224145570] [2022-02-24 03:43:57,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:57,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:57,411 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:57,533 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:57,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:57,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:57,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:57,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:43:58,072 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:43:58,072 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1224145570] [2022-02-24 03:43:58,072 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1224145570] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:43:58,073 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:43:58,073 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-24 03:43:58,073 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050831585] [2022-02-24 03:43:58,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:43:58,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-24 03:43:58,073 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:43:58,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-24 03:43:58,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=659, Invalid=1233, Unknown=0, NotChecked=0, Total=1892 [2022-02-24 03:43:58,074 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:59,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:59,057 INFO L93 Difference]: Finished difference Result 139 states and 149 transitions. [2022-02-24 03:43:59,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-24 03:43:59,057 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-24 03:43:59,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:59,058 INFO L225 Difference]: With dead ends: 139 [2022-02-24 03:43:59,058 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 03:43:59,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1944 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1840, Invalid=4802, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:43:59,061 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 103 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 980 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 980 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:59,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 24 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 980 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:43:59,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 03:43:59,067 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2022-02-24 03:43:59,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 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 03:43:59,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 98 transitions. [2022-02-24 03:43:59,068 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 98 transitions. Word has length 68 [2022-02-24 03:43:59,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:59,068 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 98 transitions. [2022-02-24 03:43:59,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.5609756097560976) internal successors, (64), 40 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:59,069 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 98 transitions. [2022-02-24 03:43:59,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 03:43:59,069 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:59,069 INFO L514 BasicCegarLoop]: trace histogram [21, 20, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:59,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:43:59,069 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:59,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:59,070 INFO L85 PathProgramCache]: Analyzing trace with hash 933441413, now seen corresponding path program 17 times [2022-02-24 03:43:59,070 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:59,070 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1925210955] [2022-02-24 03:43:59,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:59,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:59,170 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:59,281 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:43:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:59,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:59,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:59,592 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 03:44:00,070 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:00,070 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1925210955] [2022-02-24 03:44:00,070 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1925210955] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:00,070 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:00,070 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-24 03:44:00,070 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959504344] [2022-02-24 03:44:00,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:00,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-24 03:44:00,071 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:00,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-24 03:44:00,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=723, Invalid=1347, Unknown=0, NotChecked=0, Total=2070 [2022-02-24 03:44:00,073 INFO L87 Difference]: Start difference. First operand 94 states and 98 transitions. Second operand has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 42 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:01,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:01,252 INFO L93 Difference]: Finished difference Result 143 states and 153 transitions. [2022-02-24 03:44:01,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-24 03:44:01,253 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 42 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-24 03:44:01,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:01,253 INFO L225 Difference]: With dead ends: 143 [2022-02-24 03:44:01,254 INFO L226 Difference]: Without dead ends: 97 [2022-02-24 03:44:01,255 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2147 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2026, Invalid=5284, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:44:01,255 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 132 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 1095 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 1241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 1095 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:01,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 44 Invalid, 1241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 1095 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:44:01,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2022-02-24 03:44:01,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2022-02-24 03:44:01,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0543478260869565) internal successors, (97), 92 states have internal predecessors, (97), 3 states have call successors, (3), 3 states 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 03:44:01,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 101 transitions. [2022-02-24 03:44:01,261 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 101 transitions. Word has length 71 [2022-02-24 03:44:01,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:01,262 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 101 transitions. [2022-02-24 03:44:01,262 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.558139534883721) internal successors, (67), 42 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:01,262 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 101 transitions. [2022-02-24 03:44:01,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:44:01,262 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:01,262 INFO L514 BasicCegarLoop]: trace histogram [22, 21, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:01,262 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:44:01,262 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:01,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:01,263 INFO L85 PathProgramCache]: Analyzing trace with hash -338970365, now seen corresponding path program 18 times [2022-02-24 03:44:01,263 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:01,263 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [418503025] [2022-02-24 03:44:01,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:01,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:01,417 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:01,566 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:01,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:01,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:02,365 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:02,365 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [418503025] [2022-02-24 03:44:02,365 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [418503025] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:02,365 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:02,365 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-24 03:44:02,365 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140985739] [2022-02-24 03:44:02,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:02,366 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-24 03:44:02,366 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:02,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-24 03:44:02,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=790, Invalid=1466, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:44:02,367 INFO L87 Difference]: Start difference. First operand 97 states and 101 transitions. Second operand has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 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 03:44:03,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:03,686 INFO L93 Difference]: Finished difference Result 147 states and 157 transitions. [2022-02-24 03:44:03,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-24 03:44:03,687 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 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 03:44:03,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:03,687 INFO L225 Difference]: With dead ends: 147 [2022-02-24 03:44:03,687 INFO L226 Difference]: Without dead ends: 100 [2022-02-24 03:44:03,688 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2360 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2221, Invalid=5789, Unknown=0, NotChecked=0, Total=8010 [2022-02-24 03:44:03,689 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 111 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1173 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 111 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1300 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 1173 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:03,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [111 Valid, 34 Invalid, 1300 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 1173 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:44:03,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2022-02-24 03:44:03,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2022-02-24 03:44:03,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0526315789473684) internal successors, (100), 95 states have internal predecessors, (100), 3 states have call successors, (3), 3 states 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 03:44:03,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2022-02-24 03:44:03,699 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 74 [2022-02-24 03:44:03,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:03,699 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2022-02-24 03:44:03,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.5555555555555556) internal successors, (70), 44 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 03:44:03,699 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2022-02-24 03:44:03,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 03:44:03,700 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:03,700 INFO L514 BasicCegarLoop]: trace histogram [23, 22, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:03,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:44:03,700 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:03,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:03,701 INFO L85 PathProgramCache]: Analyzing trace with hash -1800475621, now seen corresponding path program 19 times [2022-02-24 03:44:03,701 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:03,701 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2497181] [2022-02-24 03:44:03,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:03,702 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:03,862 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:04,019 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:04,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:04,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:04,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:04,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:04,698 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:04,698 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2497181] [2022-02-24 03:44:04,698 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2497181] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:04,698 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:04,699 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-02-24 03:44:04,699 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145532262] [2022-02-24 03:44:04,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:04,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-02-24 03:44:04,699 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:04,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-02-24 03:44:04,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=784, Invalid=1378, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 03:44:04,700 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:05,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:05,906 INFO L93 Difference]: Finished difference Result 175 states and 209 transitions. [2022-02-24 03:44:05,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-24 03:44:05,909 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-24 03:44:05,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:05,910 INFO L225 Difference]: With dead ends: 175 [2022-02-24 03:44:05,910 INFO L226 Difference]: Without dead ends: 127 [2022-02-24 03:44:05,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2394 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2346, Invalid=5844, Unknown=0, NotChecked=0, Total=8190 [2022-02-24 03:44:05,912 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 162 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1174 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1369 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 1174 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:05,912 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 29 Invalid, 1369 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 1174 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:44:05,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2022-02-24 03:44:05,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2022-02-24 03:44:05,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 3 states have call successors, (3), 3 states 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 03:44:05,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 86 transitions. [2022-02-24 03:44:05,919 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 86 transitions. Word has length 77 [2022-02-24 03:44:05,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:05,919 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 86 transitions. [2022-02-24 03:44:05,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.553191489361702) internal successors, (73), 46 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:05,919 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 86 transitions. [2022-02-24 03:44:05,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-02-24 03:44:05,920 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:05,920 INFO L514 BasicCegarLoop]: trace histogram [25, 24, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:05,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:44:05,920 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:05,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:05,921 INFO L85 PathProgramCache]: Analyzing trace with hash 2122430194, now seen corresponding path program 20 times [2022-02-24 03:44:05,921 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:05,921 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [268408173] [2022-02-24 03:44:05,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:05,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:06,039 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:06,147 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:06,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:06,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:06,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:06,845 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:06,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [268408173] [2022-02-24 03:44:06,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [268408173] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:06,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:06,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-24 03:44:06,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758035069] [2022-02-24 03:44:06,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:06,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-24 03:44:06,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:06,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-24 03:44:06,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=958, Invalid=1798, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 03:44:06,847 INFO L87 Difference]: Start difference. First operand 83 states and 86 transitions. Second operand has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:07,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:07,923 INFO L93 Difference]: Finished difference Result 209 states and 220 transitions. [2022-02-24 03:44:07,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-02-24 03:44:07,929 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 82 [2022-02-24 03:44:07,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:07,929 INFO L225 Difference]: With dead ends: 209 [2022-02-24 03:44:07,929 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 03:44:07,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2929 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=2711, Invalid=7189, Unknown=0, NotChecked=0, Total=9900 [2022-02-24 03:44:07,931 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 209 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1500 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1727 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 1500 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:07,931 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [209 Valid, 34 Invalid, 1727 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 1500 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:44:07,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 03:44:07,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 134. [2022-02-24 03:44:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 129 states have (on average 1.0387596899224807) internal successors, (134), 129 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 03:44:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2022-02-24 03:44:07,942 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 82 [2022-02-24 03:44:07,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:07,942 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2022-02-24 03:44:07,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.56) internal successors, (78), 49 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:07,942 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2022-02-24 03:44:07,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 03:44:07,942 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:07,943 INFO L514 BasicCegarLoop]: trace histogram [26, 25, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:07,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:44:07,943 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:07,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:07,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1204084468, now seen corresponding path program 21 times [2022-02-24 03:44:07,943 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:07,943 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [767849884] [2022-02-24 03:44:07,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:07,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:08,051 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:08,159 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:08,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:08,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:08,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:08,577 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:09,133 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:09,134 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [767849884] [2022-02-24 03:44:09,134 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [767849884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:09,134 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:09,134 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-24 03:44:09,134 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903333198] [2022-02-24 03:44:09,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:09,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-24 03:44:09,134 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:09,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-24 03:44:09,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1935, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 03:44:09,135 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:10,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:10,840 INFO L93 Difference]: Finished difference Result 213 states and 223 transitions. [2022-02-24 03:44:10,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-02-24 03:44:10,840 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-24 03:44:10,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:10,841 INFO L225 Difference]: With dead ends: 213 [2022-02-24 03:44:10,841 INFO L226 Difference]: Without dead ends: 137 [2022-02-24 03:44:10,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3177 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2936, Invalid=7776, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:44:10,844 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 126 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 1598 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 1743 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:10,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 34 Invalid, 1743 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1598 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:44:10,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-24 03:44:10,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 137. [2022-02-24 03:44:10,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 132 states have (on average 1.0378787878787878) internal successors, (137), 132 states have internal predecessors, (137), 3 states have call successors, (3), 3 states 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 03:44:10,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 141 transitions. [2022-02-24 03:44:10,855 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 141 transitions. Word has length 85 [2022-02-24 03:44:10,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:10,855 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 141 transitions. [2022-02-24 03:44:10,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.5576923076923077) internal successors, (81), 51 states have internal predecessors, (81), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:10,856 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 141 transitions. [2022-02-24 03:44:10,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-02-24 03:44:10,856 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:10,856 INFO L514 BasicCegarLoop]: trace histogram [27, 26, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:10,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:44:10,856 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:10,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:10,857 INFO L85 PathProgramCache]: Analyzing trace with hash -1838863460, now seen corresponding path program 22 times [2022-02-24 03:44:10,857 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:10,857 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1210709999] [2022-02-24 03:44:10,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:10,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:11,014 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:11,192 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:11,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:11,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:11,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:11,622 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 03:44:12,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:12,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1210709999] [2022-02-24 03:44:12,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1210709999] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:12,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:12,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-24 03:44:12,056 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483515911] [2022-02-24 03:44:12,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:12,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-24 03:44:12,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-24 03:44:12,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=2100, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:44:12,057 INFO L87 Difference]: Start difference. First operand 137 states and 141 transitions. Second operand has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 53 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:13,770 INFO L93 Difference]: Finished difference Result 217 states and 227 transitions. [2022-02-24 03:44:13,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-02-24 03:44:13,770 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 53 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 88 [2022-02-24 03:44:13,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:13,771 INFO L225 Difference]: With dead ends: 217 [2022-02-24 03:44:13,771 INFO L226 Difference]: Without dead ends: 140 [2022-02-24 03:44:13,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3427 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=3147, Invalid=8409, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:44:13,773 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 159 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 1731 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 1912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 1731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:13,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 39 Invalid, 1912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 1731 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:44:13,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-24 03:44:13,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 140. [2022-02-24 03:44:13,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 3 states have call successors, (3), 3 states 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 03:44:13,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 144 transitions. [2022-02-24 03:44:13,787 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 144 transitions. Word has length 88 [2022-02-24 03:44:13,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:13,787 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 144 transitions. [2022-02-24 03:44:13,787 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.5555555555555556) internal successors, (84), 53 states have internal predecessors, (84), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:13,787 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 144 transitions. [2022-02-24 03:44:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-24 03:44:13,788 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:13,788 INFO L514 BasicCegarLoop]: trace histogram [28, 27, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:13,788 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:44:13,788 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:13,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:13,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1937559906, now seen corresponding path program 23 times [2022-02-24 03:44:13,788 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:13,788 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374694924] [2022-02-24 03:44:13,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:13,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:13,900 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:14,018 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:14,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:14,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:14,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:14,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:14,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:14,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374694924] [2022-02-24 03:44:14,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [374694924] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:14,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:14,996 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-24 03:44:14,996 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076548484] [2022-02-24 03:44:14,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:14,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-24 03:44:14,996 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:14,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-24 03:44:14,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1109, Invalid=1971, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:44:14,997 INFO L87 Difference]: Start difference. First operand 140 states and 144 transitions. Second operand has 56 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 55 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:16,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:16,646 INFO L93 Difference]: Finished difference Result 229 states and 247 transitions. [2022-02-24 03:44:16,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-02-24 03:44:16,651 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 55 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-24 03:44:16,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:16,652 INFO L225 Difference]: With dead ends: 229 [2022-02-24 03:44:16,652 INFO L226 Difference]: Without dead ends: 151 [2022-02-24 03:44:16,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3476 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3321, Invalid=8451, Unknown=0, NotChecked=0, Total=11772 [2022-02-24 03:44:16,654 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 222 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 1710 mSolverCounterSat, 251 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 222 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 1961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 251 IncrementalHoareTripleChecker+Valid, 1710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:16,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [222 Valid, 29 Invalid, 1961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [251 Valid, 1710 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:44:16,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2022-02-24 03:44:16,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2022-02-24 03:44:16,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:16,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 100 transitions. [2022-02-24 03:44:16,663 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 100 transitions. Word has length 91 [2022-02-24 03:44:16,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:16,663 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 100 transitions. [2022-02-24 03:44:16,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.5535714285714286) internal successors, (87), 55 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:16,663 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 100 transitions. [2022-02-24 03:44:16,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-02-24 03:44:16,663 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:16,663 INFO L514 BasicCegarLoop]: trace histogram [30, 29, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:16,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:44:16,664 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:16,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:16,664 INFO L85 PathProgramCache]: Analyzing trace with hash 1462513931, now seen corresponding path program 24 times [2022-02-24 03:44:16,664 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:16,664 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [301570198] [2022-02-24 03:44:16,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:16,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:16,776 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:16,912 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:16,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:17,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:17,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:17,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:18,122 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:18,122 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [301570198] [2022-02-24 03:44:18,122 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [301570198] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:18,122 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:18,122 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-02-24 03:44:18,122 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963357465] [2022-02-24 03:44:18,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:18,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-02-24 03:44:18,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:18,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-02-24 03:44:18,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1288, Invalid=2494, Unknown=0, NotChecked=0, Total=3782 [2022-02-24 03:44:18,124 INFO L87 Difference]: Start difference. First operand 97 states and 100 transitions. Second operand has 59 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 58 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:20,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:20,220 INFO L93 Difference]: Finished difference Result 247 states and 258 transitions. [2022-02-24 03:44:20,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-24 03:44:20,221 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 58 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 96 [2022-02-24 03:44:20,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:20,221 INFO L225 Difference]: With dead ends: 247 [2022-02-24 03:44:20,221 INFO L226 Difference]: Without dead ends: 158 [2022-02-24 03:44:20,223 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4106 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3725, Invalid=10081, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 03:44:20,223 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 143 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 2080 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 2080 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:20,223 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 29 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 2080 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:44:20,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-24 03:44:20,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 158. [2022-02-24 03:44:20,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.0326797385620916) internal successors, (158), 153 states have internal predecessors, (158), 3 states have call successors, (3), 3 states 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 03:44:20,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 162 transitions. [2022-02-24 03:44:20,237 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 162 transitions. Word has length 96 [2022-02-24 03:44:20,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:20,237 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 162 transitions. [2022-02-24 03:44:20,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.5593220338983051) internal successors, (92), 58 states have internal predecessors, (92), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 162 transitions. [2022-02-24 03:44:20,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-02-24 03:44:20,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:20,238 INFO L514 BasicCegarLoop]: trace histogram [31, 30, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:20,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:44:20,238 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:20,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:20,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1557647661, now seen corresponding path program 25 times [2022-02-24 03:44:20,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:20,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [130007461] [2022-02-24 03:44:20,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:20,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:20,370 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:20,487 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:20,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:20,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:20,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:21,476 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:21,476 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [130007461] [2022-02-24 03:44:21,476 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [130007461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:21,476 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:21,476 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-02-24 03:44:21,476 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192618307] [2022-02-24 03:44:21,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:21,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-02-24 03:44:21,477 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:21,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-02-24 03:44:21,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=2629, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:44:21,488 INFO L87 Difference]: Start difference. First operand 158 states and 162 transitions. Second operand has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 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 03:44:23,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:23,668 INFO L93 Difference]: Finished difference Result 251 states and 261 transitions. [2022-02-24 03:44:23,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-24 03:44:23,668 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 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 03:44:23,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:23,669 INFO L225 Difference]: With dead ends: 251 [2022-02-24 03:44:23,669 INFO L226 Difference]: Without dead ends: 161 [2022-02-24 03:44:23,670 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=4014, Invalid=10748, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 03:44:23,671 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 217 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2215 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 217 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 2454 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 2215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:23,671 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [217 Valid, 34 Invalid, 2454 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 2215 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:44:23,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-24 03:44:23,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 161. [2022-02-24 03:44:23,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0320512820512822) internal successors, (161), 156 states have internal predecessors, (161), 3 states have call successors, (3), 3 states 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 03:44:23,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 165 transitions. [2022-02-24 03:44:23,693 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 165 transitions. Word has length 99 [2022-02-24 03:44:23,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:23,693 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 165 transitions. [2022-02-24 03:44:23,693 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.5573770491803278) internal successors, (95), 60 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 03:44:23,693 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 165 transitions. [2022-02-24 03:44:23,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 03:44:23,694 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:23,694 INFO L514 BasicCegarLoop]: trace histogram [32, 31, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:23,694 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:44:23,694 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:23,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:23,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1897028085, now seen corresponding path program 26 times [2022-02-24 03:44:23,694 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:23,694 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238732649] [2022-02-24 03:44:23,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:23,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:23,902 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:24,020 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:24,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:24,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:24,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:24,561 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 03:44:25,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:25,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238732649] [2022-02-24 03:44:25,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238732649] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:25,291 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:25,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-02-24 03:44:25,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813014022] [2022-02-24 03:44:25,292 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:25,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-02-24 03:44:25,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:25,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-02-24 03:44:25,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1496, Invalid=2794, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:44:25,293 INFO L87 Difference]: Start difference. First operand 161 states and 165 transitions. Second operand has 63 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 62 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:27,594 INFO L93 Difference]: Finished difference Result 255 states and 265 transitions. [2022-02-24 03:44:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-24 03:44:27,594 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 62 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 03:44:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:27,595 INFO L225 Difference]: With dead ends: 255 [2022-02-24 03:44:27,595 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 03:44:27,596 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4711 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4287, Invalid=11463, Unknown=0, NotChecked=0, Total=15750 [2022-02-24 03:44:27,597 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 258 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 2365 mSolverCounterSat, 279 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 258 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 2644 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 279 IncrementalHoareTripleChecker+Valid, 2365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:27,601 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [258 Valid, 49 Invalid, 2644 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [279 Valid, 2365 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:44:27,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 03:44:27,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 164. [2022-02-24 03:44:27,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 159 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 03:44:27,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2022-02-24 03:44:27,617 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 102 [2022-02-24 03:44:27,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:27,617 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2022-02-24 03:44:27,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.5555555555555556) internal successors, (98), 62 states have internal predecessors, (98), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:27,617 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2022-02-24 03:44:27,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2022-02-24 03:44:27,618 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:27,618 INFO L514 BasicCegarLoop]: trace histogram [33, 32, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:27,618 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:44:27,618 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:27,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:27,618 INFO L85 PathProgramCache]: Analyzing trace with hash 388440809, now seen corresponding path program 27 times [2022-02-24 03:44:27,618 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:27,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1516325412] [2022-02-24 03:44:27,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:27,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:27,780 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:27,897 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:27,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:28,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:28,378 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 03:44:28,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:28,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1516325412] [2022-02-24 03:44:28,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1516325412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:28,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:28,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-02-24 03:44:28,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430702229] [2022-02-24 03:44:28,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:28,940 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-02-24 03:44:28,940 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:28,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-02-24 03:44:28,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1592, Invalid=2964, Unknown=0, NotChecked=0, Total=4556 [2022-02-24 03:44:28,941 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 64 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:31,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:31,338 INFO L93 Difference]: Finished difference Result 259 states and 269 transitions. [2022-02-24 03:44:31,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-24 03:44:31,338 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 64 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 105 [2022-02-24 03:44:31,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:31,339 INFO L225 Difference]: With dead ends: 259 [2022-02-24 03:44:31,339 INFO L226 Difference]: Without dead ends: 167 [2022-02-24 03:44:31,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5024 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4569, Invalid=12201, Unknown=0, NotChecked=0, Total=16770 [2022-02-24 03:44:31,342 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 117 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 2648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:31,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 59 Invalid, 2648 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:44:31,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-24 03:44:31,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 167. [2022-02-24 03:44:31,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 162 states have (on average 1.0308641975308641) internal successors, (167), 162 states have internal predecessors, (167), 3 states have call successors, (3), 3 states 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 03:44:31,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 171 transitions. [2022-02-24 03:44:31,358 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 171 transitions. Word has length 105 [2022-02-24 03:44:31,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:31,358 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 171 transitions. [2022-02-24 03:44:31,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.5538461538461539) internal successors, (101), 64 states have internal predecessors, (101), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:31,359 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 171 transitions. [2022-02-24 03:44:31,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-02-24 03:44:31,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:31,359 INFO L514 BasicCegarLoop]: trace histogram [34, 33, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:31,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:44:31,359 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:31,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:31,360 INFO L85 PathProgramCache]: Analyzing trace with hash 397725919, now seen corresponding path program 28 times [2022-02-24 03:44:31,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:31,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1587136819] [2022-02-24 03:44:31,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:31,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:31,530 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:31,687 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:31,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:32,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:32,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:32,267 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 03:44:32,839 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:32,839 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1587136819] [2022-02-24 03:44:32,839 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1587136819] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:32,839 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:32,839 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-02-24 03:44:32,839 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117644713] [2022-02-24 03:44:32,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:32,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-02-24 03:44:32,840 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:32,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-02-24 03:44:32,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1691, Invalid=3139, Unknown=0, NotChecked=0, Total=4830 [2022-02-24 03:44:32,842 INFO L87 Difference]: Start difference. First operand 167 states and 171 transitions. Second operand has 67 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 66 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:35,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:35,355 INFO L93 Difference]: Finished difference Result 263 states and 273 transitions. [2022-02-24 03:44:35,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-24 03:44:35,355 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 66 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 108 [2022-02-24 03:44:35,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:35,356 INFO L225 Difference]: With dead ends: 263 [2022-02-24 03:44:35,356 INFO L226 Difference]: Without dead ends: 170 [2022-02-24 03:44:35,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 40 SyntacticMatches, 2 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5347 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4860, Invalid=12962, Unknown=0, NotChecked=0, Total=17822 [2022-02-24 03:44:35,358 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 270 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 298 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 270 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 2936 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 298 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:35,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [270 Valid, 39 Invalid, 2936 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [298 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:44:35,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-24 03:44:35,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 170. [2022-02-24 03:44:35,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 165 states have (on average 1.0303030303030303) internal successors, (170), 165 states have internal predecessors, (170), 3 states have call successors, (3), 3 states 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 03:44:35,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 174 transitions. [2022-02-24 03:44:35,374 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 174 transitions. Word has length 108 [2022-02-24 03:44:35,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:35,374 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 174 transitions. [2022-02-24 03:44:35,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.5522388059701493) internal successors, (104), 66 states have internal predecessors, (104), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:35,375 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 174 transitions. [2022-02-24 03:44:35,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-02-24 03:44:35,375 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:35,375 INFO L514 BasicCegarLoop]: trace histogram [35, 34, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:35,375 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:44:35,376 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:35,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:35,376 INFO L85 PathProgramCache]: Analyzing trace with hash 73709823, now seen corresponding path program 29 times [2022-02-24 03:44:35,376 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:35,376 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2079156612] [2022-02-24 03:44:35,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:35,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:35,505 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:35,658 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:35,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:36,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:36,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:36,189 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:36,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:36,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2079156612] [2022-02-24 03:44:36,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2079156612] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:36,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:36,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-02-24 03:44:36,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154869459] [2022-02-24 03:44:36,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:36,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-02-24 03:44:36,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:36,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-02-24 03:44:36,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1763, Invalid=3349, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:44:36,903 INFO L87 Difference]: Start difference. First operand 170 states and 174 transitions. Second operand has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 68 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:39,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:39,522 INFO L93 Difference]: Finished difference Result 267 states and 277 transitions. [2022-02-24 03:44:39,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-24 03:44:39,536 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 68 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-02-24 03:44:39,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:39,536 INFO L225 Difference]: With dead ends: 267 [2022-02-24 03:44:39,536 INFO L226 Difference]: Without dead ends: 173 [2022-02-24 03:44:39,538 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 41 SyntacticMatches, 2 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5671 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=5130, Invalid=13776, Unknown=0, NotChecked=0, Total=18906 [2022-02-24 03:44:39,538 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 201 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2785 mSolverCounterSat, 228 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 228 IncrementalHoareTripleChecker+Valid, 2785 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:39,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [201 Valid, 34 Invalid, 3013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [228 Valid, 2785 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:44:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-24 03:44:39,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 173. [2022-02-24 03:44:39,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 168 states have (on average 1.0297619047619047) internal successors, (173), 168 states have internal predecessors, (173), 3 states have call successors, (3), 3 states 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 03:44:39,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 177 transitions. [2022-02-24 03:44:39,573 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 177 transitions. Word has length 111 [2022-02-24 03:44:39,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:39,574 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 177 transitions. [2022-02-24 03:44:39,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.5507246376811594) internal successors, (107), 68 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:39,574 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 177 transitions. [2022-02-24 03:44:39,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-02-24 03:44:39,574 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:39,574 INFO L514 BasicCegarLoop]: trace histogram [36, 35, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:39,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:44:39,575 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:39,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:39,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1297238583, now seen corresponding path program 30 times [2022-02-24 03:44:39,575 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:39,575 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2056284946] [2022-02-24 03:44:39,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:39,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:39,699 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:39,854 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:39,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:40,540 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:40,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:40,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:44:41,490 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:41,490 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2056284946] [2022-02-24 03:44:41,490 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2056284946] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:41,490 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:41,490 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-02-24 03:44:41,490 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661821946] [2022-02-24 03:44:41,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:41,490 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-02-24 03:44:41,490 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:41,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-02-24 03:44:41,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1867, Invalid=3535, Unknown=0, NotChecked=0, Total=5402 [2022-02-24 03:44:41,492 INFO L87 Difference]: Start difference. First operand 173 states and 177 transitions. Second operand has 71 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 70 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 03:44:44,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:44,460 INFO L93 Difference]: Finished difference Result 271 states and 281 transitions. [2022-02-24 03:44:44,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-24 03:44:44,460 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 70 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 03:44:44,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:44,461 INFO L225 Difference]: With dead ends: 271 [2022-02-24 03:44:44,461 INFO L226 Difference]: Without dead ends: 176 [2022-02-24 03:44:44,463 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 42 SyntacticMatches, 2 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6014 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=5438, Invalid=14584, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 03:44:44,463 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 87 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 2903 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:44,463 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 34 Invalid, 3018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2903 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:44:44,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-24 03:44:44,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 176. [2022-02-24 03:44:44,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 3 states have call successors, (3), 3 states 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 03:44:44,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2022-02-24 03:44:44,487 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 114 [2022-02-24 03:44:44,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:44,487 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2022-02-24 03:44:44,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 70 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 03:44:44,487 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2022-02-24 03:44:44,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2022-02-24 03:44:44,488 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:44,488 INFO L514 BasicCegarLoop]: trace histogram [37, 36, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:44,488 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:44:44,488 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:44,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:44,488 INFO L85 PathProgramCache]: Analyzing trace with hash -924397291, now seen corresponding path program 31 times [2022-02-24 03:44:44,488 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:44,488 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553008295] [2022-02-24 03:44:44,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:44,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:44,642 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:44,805 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:44,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:45,310 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 03:44:46,284 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:46,285 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553008295] [2022-02-24 03:44:46,285 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [553008295] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:46,285 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:46,285 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-02-24 03:44:46,285 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054615923] [2022-02-24 03:44:46,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:46,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-02-24 03:44:46,285 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:46,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-02-24 03:44:46,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1974, Invalid=3726, Unknown=0, NotChecked=0, Total=5700 [2022-02-24 03:44:46,287 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 72 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:49,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:49,256 INFO L93 Difference]: Finished difference Result 275 states and 285 transitions. [2022-02-24 03:44:49,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-24 03:44:49,256 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 72 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 117 [2022-02-24 03:44:49,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:49,257 INFO L225 Difference]: With dead ends: 275 [2022-02-24 03:44:49,257 INFO L226 Difference]: Without dead ends: 179 [2022-02-24 03:44:49,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 189 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6367 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=5755, Invalid=15415, Unknown=0, NotChecked=0, Total=21170 [2022-02-24 03:44:49,258 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 252 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3115 mSolverCounterSat, 280 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 252 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 280 IncrementalHoareTripleChecker+Valid, 3115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:49,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [252 Valid, 59 Invalid, 3395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [280 Valid, 3115 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:44:49,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-24 03:44:49,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 179. [2022-02-24 03:44:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 174 states have (on average 1.028735632183908) internal successors, (179), 174 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 03:44:49,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 183 transitions. [2022-02-24 03:44:49,275 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 183 transitions. Word has length 117 [2022-02-24 03:44:49,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:49,275 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 183 transitions. [2022-02-24 03:44:49,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.547945205479452) internal successors, (113), 72 states have internal predecessors, (113), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:49,275 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 183 transitions. [2022-02-24 03:44:49,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-02-24 03:44:49,276 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:49,276 INFO L514 BasicCegarLoop]: trace histogram [38, 37, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:49,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:44:49,276 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:49,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:49,276 INFO L85 PathProgramCache]: Analyzing trace with hash 1691822259, now seen corresponding path program 32 times [2022-02-24 03:44:49,276 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:49,276 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10942367] [2022-02-24 03:44:49,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:49,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:49,401 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:49,563 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:49,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:50,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:50,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:50,277 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 03:44:51,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:51,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10942367] [2022-02-24 03:44:51,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [10942367] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:51,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:51,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-02-24 03:44:51,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107669914] [2022-02-24 03:44:51,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:51,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-02-24 03:44:51,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:51,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-02-24 03:44:51,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2117, Invalid=3889, Unknown=0, NotChecked=0, Total=6006 [2022-02-24 03:44:51,248 INFO L87 Difference]: Start difference. First operand 179 states and 183 transitions. Second operand has 75 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 74 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:54,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:54,506 INFO L93 Difference]: Finished difference Result 279 states and 289 transitions. [2022-02-24 03:44:54,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-24 03:44:54,506 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 74 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 120 [2022-02-24 03:44:54,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:54,507 INFO L225 Difference]: With dead ends: 279 [2022-02-24 03:44:54,507 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 03:44:54,509 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6739 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=6114, Invalid=16236, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:44:54,509 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 259 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 3245 mSolverCounterSat, 289 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 3534 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 289 IncrementalHoareTripleChecker+Valid, 3245 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:54,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 59 Invalid, 3534 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [289 Valid, 3245 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:44:54,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 03:44:54,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-02-24 03:44:54,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 3 states have call successors, (3), 3 states 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 03:44:54,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 186 transitions. [2022-02-24 03:44:54,526 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 186 transitions. Word has length 120 [2022-02-24 03:44:54,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:54,526 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 186 transitions. [2022-02-24 03:44:54,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.5466666666666666) internal successors, (116), 74 states have internal predecessors, (116), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:54,527 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 186 transitions. [2022-02-24 03:44:54,527 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-02-24 03:44:54,527 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:54,527 INFO L514 BasicCegarLoop]: trace histogram [39, 38, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:54,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:44:54,527 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:54,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:54,528 INFO L85 PathProgramCache]: Analyzing trace with hash 980634411, now seen corresponding path program 33 times [2022-02-24 03:44:54,528 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:54,528 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1735007625] [2022-02-24 03:44:54,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:54,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:54,654 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:54,781 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:54,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:55,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:44:55,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:44:55,496 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 03:44:56,200 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:44:56,200 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1735007625] [2022-02-24 03:44:56,200 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1735007625] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:44:56,200 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:44:56,200 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-02-24 03:44:56,200 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414160641] [2022-02-24 03:44:56,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:44:56,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-02-24 03:44:56,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:44:56,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-02-24 03:44:56,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2231, Invalid=4089, Unknown=0, NotChecked=0, Total=6320 [2022-02-24 03:44:56,202 INFO L87 Difference]: Start difference. First operand 182 states and 186 transitions. Second operand has 77 states, 77 states have (on average 1.5454545454545454) internal successors, (119), 76 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:59,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:44:59,011 INFO L93 Difference]: Finished difference Result 283 states and 293 transitions. [2022-02-24 03:44:59,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-24 03:44:59,011 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.5454545454545454) internal successors, (119), 76 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-02-24 03:44:59,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:44:59,012 INFO L225 Difference]: With dead ends: 283 [2022-02-24 03:44:59,012 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 03:44:59,013 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 152 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7112 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=6450, Invalid=17112, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 03:44:59,013 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 264 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 3414 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 3707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 3414 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:44:59,014 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 34 Invalid, 3707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 3414 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:44:59,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 03:44:59,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 185. [2022-02-24 03:44:59,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 180 states have (on average 1.0277777777777777) internal successors, (185), 180 states have internal predecessors, (185), 3 states have call successors, (3), 3 states 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 03:44:59,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 189 transitions. [2022-02-24 03:44:59,030 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 189 transitions. Word has length 123 [2022-02-24 03:44:59,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:44:59,031 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 189 transitions. [2022-02-24 03:44:59,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.5454545454545454) internal successors, (119), 76 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:44:59,031 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 189 transitions. [2022-02-24 03:44:59,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-02-24 03:44:59,031 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:44:59,031 INFO L514 BasicCegarLoop]: trace histogram [40, 39, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:44:59,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:44:59,032 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:44:59,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:44:59,032 INFO L85 PathProgramCache]: Analyzing trace with hash 642468253, now seen corresponding path program 34 times [2022-02-24 03:44:59,032 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:44:59,032 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [758135386] [2022-02-24 03:44:59,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:44:59,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:44:59,195 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:59,318 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:44:59,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:00,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:00,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:01,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:01,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [758135386] [2022-02-24 03:45:01,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [758135386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:01,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:01,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-02-24 03:45:01,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809327187] [2022-02-24 03:45:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:01,175 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-02-24 03:45:01,175 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:01,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-02-24 03:45:01,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2348, Invalid=4294, Unknown=0, NotChecked=0, Total=6642 [2022-02-24 03:45:01,176 INFO L87 Difference]: Start difference. First operand 185 states and 189 transitions. Second operand has 79 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 78 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:04,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:04,868 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2022-02-24 03:45:04,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-24 03:45:04,868 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 78 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 126 [2022-02-24 03:45:04,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:04,869 INFO L225 Difference]: With dead ends: 287 [2022-02-24 03:45:04,869 INFO L226 Difference]: Without dead ends: 188 [2022-02-24 03:45:04,871 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 156 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7495 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=6795, Invalid=18011, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 03:45:04,872 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 182 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 3598 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 3812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 3598 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:04,872 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 49 Invalid, 3812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 3598 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-24 03:45:04,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-24 03:45:04,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 188. [2022-02-24 03:45:04,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 3 states have call successors, (3), 3 states 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 03:45:04,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 192 transitions. [2022-02-24 03:45:04,888 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 192 transitions. Word has length 126 [2022-02-24 03:45:04,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:04,888 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 192 transitions. [2022-02-24 03:45:04,888 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.5443037974683544) internal successors, (122), 78 states have internal predecessors, (122), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:04,888 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 192 transitions. [2022-02-24 03:45:04,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2022-02-24 03:45:04,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:04,889 INFO L514 BasicCegarLoop]: trace histogram [41, 40, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:04,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:45:04,889 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:04,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:04,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1936718015, now seen corresponding path program 35 times [2022-02-24 03:45:04,889 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:04,889 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400104587] [2022-02-24 03:45:04,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:04,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:04,980 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:05,162 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:05,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:05,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:05,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:05,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:06,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:06,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400104587] [2022-02-24 03:45:06,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [400104587] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:06,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:06,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-02-24 03:45:06,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405010834] [2022-02-24 03:45:06,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:06,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-02-24 03:45:06,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:06,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-02-24 03:45:06,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2468, Invalid=4504, Unknown=0, NotChecked=0, Total=6972 [2022-02-24 03:45:06,601 INFO L87 Difference]: Start difference. First operand 188 states and 192 transitions. Second operand has 81 states, 81 states have (on average 1.5432098765432098) internal successors, (125), 80 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 03:45:09,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:09,699 INFO L93 Difference]: Finished difference Result 291 states and 301 transitions. [2022-02-24 03:45:09,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-24 03:45:09,699 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.5432098765432098) internal successors, (125), 80 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 03:45:09,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:09,700 INFO L225 Difference]: With dead ends: 291 [2022-02-24 03:45:09,700 INFO L226 Difference]: Without dead ends: 191 [2022-02-24 03:45:09,701 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7888 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=7149, Invalid=18933, Unknown=0, NotChecked=0, Total=26082 [2022-02-24 03:45:09,702 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 232 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 3728 mSolverCounterSat, 264 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 232 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 3992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 264 IncrementalHoareTripleChecker+Valid, 3728 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:09,702 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [232 Valid, 29 Invalid, 3992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [264 Valid, 3728 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:45:09,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-24 03:45:09,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2022-02-24 03:45:09,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 186 states have (on average 1.0268817204301075) internal successors, (191), 186 states have internal predecessors, (191), 3 states have call successors, (3), 3 states 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 03:45:09,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 195 transitions. [2022-02-24 03:45:09,725 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 195 transitions. Word has length 129 [2022-02-24 03:45:09,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:09,725 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 195 transitions. [2022-02-24 03:45:09,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.5432098765432098) internal successors, (125), 80 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 03:45:09,725 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 195 transitions. [2022-02-24 03:45:09,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-02-24 03:45:09,726 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:09,726 INFO L514 BasicCegarLoop]: trace histogram [42, 41, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:09,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 03:45:09,726 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:09,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:09,726 INFO L85 PathProgramCache]: Analyzing trace with hash -563857273, now seen corresponding path program 36 times [2022-02-24 03:45:09,726 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:09,731 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1695854418] [2022-02-24 03:45:09,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:09,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:09,879 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:10,027 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:10,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:10,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:11,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:11,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1695854418] [2022-02-24 03:45:11,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1695854418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:11,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:11,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-02-24 03:45:11,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228131452] [2022-02-24 03:45:11,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:11,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-02-24 03:45:11,526 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:11,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-02-24 03:45:11,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2554, Invalid=4756, Unknown=0, NotChecked=0, Total=7310 [2022-02-24 03:45:11,527 INFO L87 Difference]: Start difference. First operand 191 states and 195 transitions. Second operand has 83 states, 83 states have (on average 1.5421686746987953) internal successors, (128), 82 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:14,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:14,667 INFO L93 Difference]: Finished difference Result 295 states and 305 transitions. [2022-02-24 03:45:14,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-24 03:45:14,667 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.5421686746987953) internal successors, (128), 82 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 132 [2022-02-24 03:45:14,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:14,684 INFO L225 Difference]: With dead ends: 295 [2022-02-24 03:45:14,684 INFO L226 Difference]: Without dead ends: 194 [2022-02-24 03:45:14,686 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8282 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=7475, Invalid=19915, Unknown=0, NotChecked=0, Total=27390 [2022-02-24 03:45:14,686 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 145 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 3896 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 3896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:14,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 39 Invalid, 4075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 3896 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:45:14,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-24 03:45:14,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 194. [2022-02-24 03:45:14,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.0264550264550265) internal successors, (194), 189 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 03:45:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 198 transitions. [2022-02-24 03:45:14,715 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 198 transitions. Word has length 132 [2022-02-24 03:45:14,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:14,715 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 198 transitions. [2022-02-24 03:45:14,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.5421686746987953) internal successors, (128), 82 states have internal predecessors, (128), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:14,715 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 198 transitions. [2022-02-24 03:45:14,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-02-24 03:45:14,715 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:14,716 INFO L514 BasicCegarLoop]: trace histogram [43, 42, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:14,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 03:45:14,716 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:14,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:14,716 INFO L85 PathProgramCache]: Analyzing trace with hash 914548055, now seen corresponding path program 37 times [2022-02-24 03:45:14,716 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:14,716 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1114774405] [2022-02-24 03:45:14,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:14,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:14,904 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:14,985 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:15,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:15,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:15,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:15,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:16,456 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:16,457 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1114774405] [2022-02-24 03:45:16,457 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1114774405] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:16,457 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:16,457 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-02-24 03:45:16,457 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182551217] [2022-02-24 03:45:16,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:16,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-02-24 03:45:16,457 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:16,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-02-24 03:45:16,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2717, Invalid=4939, Unknown=0, NotChecked=0, Total=7656 [2022-02-24 03:45:16,458 INFO L87 Difference]: Start difference. First operand 194 states and 198 transitions. Second operand has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:19,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:19,327 INFO L93 Difference]: Finished difference Result 299 states and 309 transitions. [2022-02-24 03:45:19,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-24 03:45:19,327 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-02-24 03:45:19,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:19,328 INFO L225 Difference]: With dead ends: 299 [2022-02-24 03:45:19,328 INFO L226 Difference]: Without dead ends: 197 [2022-02-24 03:45:19,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8704 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=7884, Invalid=20846, Unknown=0, NotChecked=0, Total=28730 [2022-02-24 03:45:19,329 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 336 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4082 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 4082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:19,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [336 Valid, 34 Invalid, 4453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 4082 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-24 03:45:19,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-24 03:45:19,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2022-02-24 03:45:19,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 192 states have (on average 1.0260416666666667) internal successors, (197), 192 states have internal predecessors, (197), 3 states have call successors, (3), 3 states 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 03:45:19,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 201 transitions. [2022-02-24 03:45:19,365 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 201 transitions. Word has length 135 [2022-02-24 03:45:19,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:19,366 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 201 transitions. [2022-02-24 03:45:19,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.5411764705882354) internal successors, (131), 84 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:19,366 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 201 transitions. [2022-02-24 03:45:19,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-02-24 03:45:19,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:19,366 INFO L514 BasicCegarLoop]: trace histogram [44, 43, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:19,366 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 03:45:19,366 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:19,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:19,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2109478257, now seen corresponding path program 38 times [2022-02-24 03:45:19,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:19,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427701571] [2022-02-24 03:45:19,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:19,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:19,587 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:19,760 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:19,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:20,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:20,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:20,474 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 03:45:21,720 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:21,720 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427701571] [2022-02-24 03:45:21,720 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427701571] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:21,720 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:21,720 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-02-24 03:45:21,720 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204509887] [2022-02-24 03:45:21,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:21,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-02-24 03:45:21,721 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:21,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-02-24 03:45:21,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2711, Invalid=4771, Unknown=0, NotChecked=0, Total=7482 [2022-02-24 03:45:21,722 INFO L87 Difference]: Start difference. First operand 197 states and 201 transitions. Second operand has 87 states, 87 states have (on average 1.5402298850574712) internal successors, (134), 86 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:25,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:25,923 INFO L93 Difference]: Finished difference Result 333 states and 373 transitions. [2022-02-24 03:45:25,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-24 03:45:25,925 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.5402298850574712) internal successors, (134), 86 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 138 [2022-02-24 03:45:25,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:25,925 INFO L225 Difference]: With dead ends: 333 [2022-02-24 03:45:25,925 INFO L226 Difference]: Without dead ends: 230 [2022-02-24 03:45:25,927 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8774 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=8127, Invalid=20943, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 03:45:25,927 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 426 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4052 mSolverCounterSat, 395 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 426 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 4447 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 395 IncrementalHoareTripleChecker+Valid, 4052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:25,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [426 Valid, 34 Invalid, 4447 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [395 Valid, 4052 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:45:25,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-24 03:45:25,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 144. [2022-02-24 03:45:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 139 states have (on average 1.0287769784172662) internal successors, (143), 139 states have internal predecessors, (143), 3 states have call successors, (3), 3 states 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 03:45:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 147 transitions. [2022-02-24 03:45:25,942 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 147 transitions. Word has length 138 [2022-02-24 03:45:25,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:25,942 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 147 transitions. [2022-02-24 03:45:25,942 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.5402298850574712) internal successors, (134), 86 states have internal predecessors, (134), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:25,943 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 147 transitions. [2022-02-24 03:45:25,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-24 03:45:25,943 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:25,943 INFO L514 BasicCegarLoop]: trace histogram [46, 45, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:25,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 03:45:25,943 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:25,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:25,944 INFO L85 PathProgramCache]: Analyzing trace with hash -819346424, now seen corresponding path program 39 times [2022-02-24 03:45:25,944 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:25,944 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [141507894] [2022-02-24 03:45:25,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:25,945 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:26,075 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:26,273 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:26,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:26,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:26,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:26,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:27,913 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:27,914 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [141507894] [2022-02-24 03:45:27,914 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [141507894] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:27,914 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:27,914 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-24 03:45:27,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605785583] [2022-02-24 03:45:27,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:27,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-24 03:45:27,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:27,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-24 03:45:27,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2982, Invalid=5574, Unknown=0, NotChecked=0, Total=8556 [2022-02-24 03:45:27,915 INFO L87 Difference]: Start difference. First operand 144 states and 147 transitions. Second operand has 90 states, 90 states have (on average 1.5444444444444445) internal successors, (139), 89 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:31,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:31,109 INFO L93 Difference]: Finished difference Result 373 states and 384 transitions. [2022-02-24 03:45:31,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-02-24 03:45:31,110 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.5444444444444445) internal successors, (139), 89 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-02-24 03:45:31,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:31,111 INFO L225 Difference]: With dead ends: 373 [2022-02-24 03:45:31,111 INFO L226 Difference]: Without dead ends: 237 [2022-02-24 03:45:31,112 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 178 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9760 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=8745, Invalid=23475, Unknown=0, NotChecked=0, Total=32220 [2022-02-24 03:45:31,113 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 157 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 4628 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 4823 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 4628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:31,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 39 Invalid, 4823 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 4628 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:45:31,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-02-24 03:45:31,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 237. [2022-02-24 03:45:31,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 232 states have (on average 1.021551724137931) internal successors, (237), 232 states have internal predecessors, (237), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:31,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 241 transitions. [2022-02-24 03:45:31,138 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 241 transitions. Word has length 143 [2022-02-24 03:45:31,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:31,138 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 241 transitions. [2022-02-24 03:45:31,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.5444444444444445) internal successors, (139), 89 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:31,138 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 241 transitions. [2022-02-24 03:45:31,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-24 03:45:31,139 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:31,139 INFO L514 BasicCegarLoop]: trace histogram [47, 46, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:31,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 03:45:31,139 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:31,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:31,139 INFO L85 PathProgramCache]: Analyzing trace with hash 850573280, now seen corresponding path program 40 times [2022-02-24 03:45:31,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:31,140 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340865043] [2022-02-24 03:45:31,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:31,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:31,256 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:31,388 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:31,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:32,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:32,389 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 03:45:33,658 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:33,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340865043] [2022-02-24 03:45:33,659 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340865043] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:33,659 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:33,659 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-24 03:45:33,659 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438180974] [2022-02-24 03:45:33,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:33,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-24 03:45:33,659 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:33,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-24 03:45:33,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3158, Invalid=5772, Unknown=0, NotChecked=0, Total=8930 [2022-02-24 03:45:33,662 INFO L87 Difference]: Start difference. First operand 237 states and 241 transitions. Second operand has 92 states, 92 states have (on average 1.5434782608695652) internal successors, (142), 91 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:37,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:37,488 INFO L93 Difference]: Finished difference Result 377 states and 387 transitions. [2022-02-24 03:45:37,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-02-24 03:45:37,489 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.5434782608695652) internal successors, (142), 91 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-02-24 03:45:37,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:37,490 INFO L225 Difference]: With dead ends: 377 [2022-02-24 03:45:37,490 INFO L226 Difference]: Without dead ends: 240 [2022-02-24 03:45:37,493 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 53 SyntacticMatches, 2 SemanticMatches, 182 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10218 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=9187, Invalid=24485, Unknown=0, NotChecked=0, Total=33672 [2022-02-24 03:45:37,494 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 261 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 4853 mSolverCounterSat, 300 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 261 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 300 IncrementalHoareTripleChecker+Valid, 4853 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:37,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [261 Valid, 34 Invalid, 5153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [300 Valid, 4853 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 03:45:37,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-24 03:45:37,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 240. [2022-02-24 03:45:37,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 235 states have (on average 1.0212765957446808) internal successors, (240), 235 states have internal predecessors, (240), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:37,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2022-02-24 03:45:37,520 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 146 [2022-02-24 03:45:37,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:37,521 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2022-02-24 03:45:37,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.5434782608695652) internal successors, (142), 91 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:37,521 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2022-02-24 03:45:37,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-24 03:45:37,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:37,521 INFO L514 BasicCegarLoop]: trace histogram [48, 47, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:37,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 03:45:37,522 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:37,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:37,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1802902050, now seen corresponding path program 41 times [2022-02-24 03:45:37,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:37,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1418667414] [2022-02-24 03:45:37,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:37,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:37,674 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:37,803 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:37,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:38,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:38,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:38,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:40,404 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:40,404 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1418667414] [2022-02-24 03:45:40,404 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1418667414] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:40,404 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:40,404 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-24 03:45:40,404 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352913580] [2022-02-24 03:45:40,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:40,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-24 03:45:40,404 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:40,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-24 03:45:40,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3297, Invalid=6015, Unknown=0, NotChecked=0, Total=9312 [2022-02-24 03:45:40,406 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 94 states, 94 states have (on average 1.5425531914893618) internal successors, (145), 93 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 03:45:45,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:45,491 INFO L93 Difference]: Finished difference Result 381 states and 391 transitions. [2022-02-24 03:45:45,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2022-02-24 03:45:45,491 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.5425531914893618) internal successors, (145), 93 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 03:45:45,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:45,505 INFO L225 Difference]: With dead ends: 381 [2022-02-24 03:45:45,506 INFO L226 Difference]: Without dead ends: 243 [2022-02-24 03:45:45,507 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 186 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10676 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=9598, Invalid=25558, Unknown=0, NotChecked=0, Total=35156 [2022-02-24 03:45:45,508 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 576 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 5042 mSolverCounterSat, 618 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 576 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 5660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 618 IncrementalHoareTripleChecker+Valid, 5042 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:45,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [576 Valid, 34 Invalid, 5660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [618 Valid, 5042 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:45:45,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-02-24 03:45:45,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 243. [2022-02-24 03:45:45,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 238 states have (on average 1.0210084033613445) internal successors, (243), 238 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:45,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 247 transitions. [2022-02-24 03:45:45,540 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 247 transitions. Word has length 149 [2022-02-24 03:45:45,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:45,540 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 247 transitions. [2022-02-24 03:45:45,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.5425531914893618) internal successors, (145), 93 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 03:45:45,540 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 247 transitions. [2022-02-24 03:45:45,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-24 03:45:45,541 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:45,541 INFO L514 BasicCegarLoop]: trace histogram [49, 48, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:45,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 03:45:45,541 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:45,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:45,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1905154314, now seen corresponding path program 42 times [2022-02-24 03:45:45,542 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:45,564 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1722895770] [2022-02-24 03:45:45,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:45,565 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:45,704 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:45,828 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:45,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:46,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:46,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:46,637 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 03:45:47,703 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:47,703 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1722895770] [2022-02-24 03:45:47,703 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1722895770] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:47,703 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:47,703 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-24 03:45:47,703 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887823714] [2022-02-24 03:45:47,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:47,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-24 03:45:47,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:47,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-24 03:45:47,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3439, Invalid=6263, Unknown=0, NotChecked=0, Total=9702 [2022-02-24 03:45:47,707 INFO L87 Difference]: Start difference. First operand 243 states and 247 transitions. Second operand has 96 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 95 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:52,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:45:52,175 INFO L93 Difference]: Finished difference Result 385 states and 395 transitions. [2022-02-24 03:45:52,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-02-24 03:45:52,175 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 95 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-24 03:45:52,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:45:52,176 INFO L225 Difference]: With dead ends: 385 [2022-02-24 03:45:52,176 INFO L226 Difference]: Without dead ends: 246 [2022-02-24 03:45:52,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 55 SyntacticMatches, 2 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11144 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=10018, Invalid=26654, Unknown=0, NotChecked=0, Total=36672 [2022-02-24 03:45:52,179 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 272 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 5269 mSolverCounterSat, 312 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 5581 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 312 IncrementalHoareTripleChecker+Valid, 5269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:45:52,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 64 Invalid, 5581 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [312 Valid, 5269 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:45:52,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-24 03:45:52,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 246. [2022-02-24 03:45:52,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 241 states have (on average 1.020746887966805) internal successors, (246), 241 states have internal predecessors, (246), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:52,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 250 transitions. [2022-02-24 03:45:52,213 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 250 transitions. Word has length 152 [2022-02-24 03:45:52,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:45:52,213 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 250 transitions. [2022-02-24 03:45:52,213 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.5416666666666667) internal successors, (148), 95 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:45:52,213 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 250 transitions. [2022-02-24 03:45:52,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-24 03:45:52,214 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:45:52,214 INFO L514 BasicCegarLoop]: trace histogram [50, 49, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:45:52,214 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 03:45:52,214 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:45:52,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:45:52,214 INFO L85 PathProgramCache]: Analyzing trace with hash 393935284, now seen corresponding path program 43 times [2022-02-24 03:45:52,214 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:45:52,214 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2004189083] [2022-02-24 03:45:52,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:45:52,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:45:52,347 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:52,518 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:45:52,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:53,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:45:53,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:45:53,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:45:54,804 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:45:54,804 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2004189083] [2022-02-24 03:45:54,804 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2004189083] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:45:54,804 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:45:54,804 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-24 03:45:54,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517831641] [2022-02-24 03:45:54,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:45:54,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-24 03:45:54,805 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:45:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-24 03:45:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3433, Invalid=6073, Unknown=0, NotChecked=0, Total=9506 [2022-02-24 03:45:54,806 INFO L87 Difference]: Start difference. First operand 246 states and 250 transitions. Second operand has 98 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 97 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:00,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:00,069 INFO L93 Difference]: Finished difference Result 399 states and 419 transitions. [2022-02-24 03:46:00,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2022-02-24 03:46:00,071 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 97 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-02-24 03:46:00,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:00,071 INFO L225 Difference]: With dead ends: 399 [2022-02-24 03:46:00,071 INFO L226 Difference]: Without dead ends: 259 [2022-02-24 03:46:00,074 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 250 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 191 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11266 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=10293, Invalid=26763, Unknown=0, NotChecked=0, Total=37056 [2022-02-24 03:46:00,074 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 324 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 5208 mSolverCounterSat, 431 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 324 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 5639 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 431 IncrementalHoareTripleChecker+Valid, 5208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:00,074 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [324 Valid, 39 Invalid, 5639 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [431 Valid, 5208 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:46:00,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2022-02-24 03:46:00,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 161. [2022-02-24 03:46:00,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 156 states have (on average 1.0256410256410255) internal successors, (160), 156 states have internal predecessors, (160), 3 states have call successors, (3), 3 states 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 03:46:00,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 164 transitions. [2022-02-24 03:46:00,092 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 164 transitions. Word has length 155 [2022-02-24 03:46:00,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:00,092 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 164 transitions. [2022-02-24 03:46:00,092 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.5408163265306123) internal successors, (151), 97 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:00,092 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 164 transitions. [2022-02-24 03:46:00,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-02-24 03:46:00,092 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:00,092 INFO L514 BasicCegarLoop]: trace histogram [52, 51, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:00,093 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 03:46:00,093 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:00,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:00,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1048036089, now seen corresponding path program 44 times [2022-02-24 03:46:00,093 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:00,093 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [18223777] [2022-02-24 03:46:00,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:00,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:00,237 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:00,384 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:00,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:01,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:01,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:01,612 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 03:46:03,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:03,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [18223777] [2022-02-24 03:46:03,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [18223777] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:03,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:03,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [101] imperfect sequences [] total 101 [2022-02-24 03:46:03,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113066708] [2022-02-24 03:46:03,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:03,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2022-02-24 03:46:03,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:03,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2022-02-24 03:46:03,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3781, Invalid=6931, Unknown=0, NotChecked=0, Total=10712 [2022-02-24 03:46:03,322 INFO L87 Difference]: Start difference. First operand 161 states and 164 transitions. Second operand has 101 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 100 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:09,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:09,284 INFO L93 Difference]: Finished difference Result 419 states and 430 transitions. [2022-02-24 03:46:09,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-24 03:46:09,284 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 100 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 160 [2022-02-24 03:46:09,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:09,285 INFO L225 Difference]: With dead ends: 419 [2022-02-24 03:46:09,285 INFO L226 Difference]: Without dead ends: 266 [2022-02-24 03:46:09,289 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 58 SyntacticMatches, 2 SemanticMatches, 200 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12346 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=11030, Invalid=29572, Unknown=0, NotChecked=0, Total=40602 [2022-02-24 03:46:09,289 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 5871 mSolverCounterSat, 330 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 6201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 330 IncrementalHoareTripleChecker+Valid, 5871 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:09,290 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 49 Invalid, 6201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [330 Valid, 5871 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:46:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-24 03:46:09,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 266. [2022-02-24 03:46:09,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 261 states have (on average 1.0191570881226053) internal successors, (266), 261 states have internal predecessors, (266), 3 states have call successors, (3), 3 states 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 03:46:09,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 270 transitions. [2022-02-24 03:46:09,326 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 270 transitions. Word has length 160 [2022-02-24 03:46:09,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:09,326 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 270 transitions. [2022-02-24 03:46:09,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.5445544554455446) internal successors, (156), 100 states have internal predecessors, (156), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:09,327 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 270 transitions. [2022-02-24 03:46:09,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-02-24 03:46:09,327 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:09,327 INFO L514 BasicCegarLoop]: trace histogram [53, 52, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:09,327 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 03:46:09,327 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:09,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:09,328 INFO L85 PathProgramCache]: Analyzing trace with hash -1691843931, now seen corresponding path program 45 times [2022-02-24 03:46:09,328 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:09,328 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1311345817] [2022-02-24 03:46:09,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:09,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:09,515 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:09,662 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:09,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:10,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:10,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:10,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:12,495 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:12,495 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1311345817] [2022-02-24 03:46:12,495 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1311345817] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:12,495 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:12,495 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2022-02-24 03:46:12,495 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163363949] [2022-02-24 03:46:12,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:12,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2022-02-24 03:46:12,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:12,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2022-02-24 03:46:12,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3933, Invalid=7197, Unknown=0, NotChecked=0, Total=11130 [2022-02-24 03:46:12,497 INFO L87 Difference]: Start difference. First operand 266 states and 270 transitions. Second operand has 103 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 102 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:18,243 INFO L93 Difference]: Finished difference Result 423 states and 433 transitions. [2022-02-24 03:46:18,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-24 03:46:18,243 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 102 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-02-24 03:46:18,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:18,244 INFO L225 Difference]: With dead ends: 423 [2022-02-24 03:46:18,244 INFO L226 Difference]: Without dead ends: 269 [2022-02-24 03:46:18,247 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 59 SyntacticMatches, 2 SemanticMatches, 204 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12849 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11480, Invalid=30750, Unknown=0, NotChecked=0, Total=42230 [2022-02-24 03:46:18,247 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 178 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6072 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6293 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 6072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:18,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 39 Invalid, 6293 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 6072 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:46:18,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-24 03:46:18,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 269. [2022-02-24 03:46:18,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 264 states have (on average 1.018939393939394) internal successors, (269), 264 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 03:46:18,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 273 transitions. [2022-02-24 03:46:18,316 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 273 transitions. Word has length 163 [2022-02-24 03:46:18,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:18,316 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 273 transitions. [2022-02-24 03:46:18,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.5436893203883495) internal successors, (159), 102 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:18,316 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 273 transitions. [2022-02-24 03:46:18,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-02-24 03:46:18,317 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:18,317 INFO L514 BasicCegarLoop]: trace histogram [54, 53, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:18,317 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 03:46:18,317 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:18,317 INFO L85 PathProgramCache]: Analyzing trace with hash 1426184291, now seen corresponding path program 46 times [2022-02-24 03:46:18,318 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:18,318 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [126719154] [2022-02-24 03:46:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:18,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:18,512 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:18,727 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:18,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:20,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:20,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:21,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:21,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [126719154] [2022-02-24 03:46:21,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [126719154] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:21,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:21,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [105] imperfect sequences [] total 105 [2022-02-24 03:46:21,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669389875] [2022-02-24 03:46:21,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:21,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2022-02-24 03:46:21,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:21,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2022-02-24 03:46:21,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4088, Invalid=7468, Unknown=0, NotChecked=0, Total=11556 [2022-02-24 03:46:21,833 INFO L87 Difference]: Start difference. First operand 269 states and 273 transitions. Second operand has 105 states, 105 states have (on average 1.542857142857143) internal successors, (162), 104 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:26,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:26,860 INFO L93 Difference]: Finished difference Result 427 states and 437 transitions. [2022-02-24 03:46:26,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-24 03:46:26,860 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.542857142857143) internal successors, (162), 104 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 166 [2022-02-24 03:46:26,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:26,861 INFO L225 Difference]: With dead ends: 427 [2022-02-24 03:46:26,861 INFO L226 Difference]: Without dead ends: 272 [2022-02-24 03:46:26,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 60 SyntacticMatches, 2 SemanticMatches, 208 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13362 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=11939, Invalid=31951, Unknown=0, NotChecked=0, Total=43890 [2022-02-24 03:46:26,863 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 354 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6310 mSolverCounterSat, 399 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 354 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 6709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 399 IncrementalHoareTripleChecker+Valid, 6310 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:26,863 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [354 Valid, 44 Invalid, 6709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [399 Valid, 6310 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:46:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-24 03:46:26,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 272. [2022-02-24 03:46:26,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 267 states have (on average 1.0187265917602997) internal successors, (272), 267 states have internal predecessors, (272), 3 states have call successors, (3), 3 states 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 03:46:26,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 276 transitions. [2022-02-24 03:46:26,893 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 276 transitions. Word has length 166 [2022-02-24 03:46:26,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:26,893 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 276 transitions. [2022-02-24 03:46:26,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.542857142857143) internal successors, (162), 104 states have internal predecessors, (162), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:46:26,893 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 276 transitions. [2022-02-24 03:46:26,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-24 03:46:26,894 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:26,894 INFO L514 BasicCegarLoop]: trace histogram [55, 54, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:26,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 03:46:26,894 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:26,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:26,894 INFO L85 PathProgramCache]: Analyzing trace with hash 925047355, now seen corresponding path program 47 times [2022-02-24 03:46:26,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:26,895 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89372229] [2022-02-24 03:46:26,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:26,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:27,073 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:27,229 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:27,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:28,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:28,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:28,352 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:29,977 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:29,977 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89372229] [2022-02-24 03:46:29,977 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [89372229] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:29,977 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:29,977 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [107] imperfect sequences [] total 107 [2022-02-24 03:46:29,977 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706774631] [2022-02-24 03:46:29,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:29,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2022-02-24 03:46:29,978 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:29,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2022-02-24 03:46:29,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4246, Invalid=7744, Unknown=0, NotChecked=0, Total=11990 [2022-02-24 03:46:29,980 INFO L87 Difference]: Start difference. First operand 272 states and 276 transitions. Second operand has 107 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 106 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 03:46:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:36,416 INFO L93 Difference]: Finished difference Result 431 states and 441 transitions. [2022-02-24 03:46:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-24 03:46:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 106 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 03:46:36,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:36,417 INFO L225 Difference]: With dead ends: 431 [2022-02-24 03:46:36,417 INFO L226 Difference]: Without dead ends: 275 [2022-02-24 03:46:36,420 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 61 SyntacticMatches, 2 SemanticMatches, 212 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13885 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=12407, Invalid=33175, Unknown=0, NotChecked=0, Total=45582 [2022-02-24 03:46:36,420 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 359 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 6557 mSolverCounterSat, 404 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 359 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 6961 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 404 IncrementalHoareTripleChecker+Valid, 6557 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:36,420 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [359 Valid, 39 Invalid, 6961 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [404 Valid, 6557 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:46:36,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-24 03:46:36,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 275. [2022-02-24 03:46:36,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 270 states have (on average 1.0185185185185186) internal successors, (275), 270 states have internal predecessors, (275), 3 states have call successors, (3), 3 states 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 03:46:36,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 279 transitions. [2022-02-24 03:46:36,469 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 279 transitions. Word has length 169 [2022-02-24 03:46:36,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:36,469 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 279 transitions. [2022-02-24 03:46:36,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 1.5420560747663552) internal successors, (165), 106 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 03:46:36,469 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 279 transitions. [2022-02-24 03:46:36,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-02-24 03:46:36,470 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:36,470 INFO L514 BasicCegarLoop]: trace histogram [56, 55, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:36,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 03:46:36,470 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:36,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1212474419, now seen corresponding path program 48 times [2022-02-24 03:46:36,470 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:36,470 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264125747] [2022-02-24 03:46:36,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:36,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:36,669 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:36,880 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:36,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:38,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:38,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:38,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:40,114 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:40,114 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264125747] [2022-02-24 03:46:40,114 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264125747] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:40,114 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:40,114 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [109] imperfect sequences [] total 109 [2022-02-24 03:46:40,114 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998999186] [2022-02-24 03:46:40,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:40,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2022-02-24 03:46:40,115 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:40,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2022-02-24 03:46:40,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4358, Invalid=8074, Unknown=0, NotChecked=0, Total=12432 [2022-02-24 03:46:40,117 INFO L87 Difference]: Start difference. First operand 275 states and 279 transitions. Second operand has 109 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 108 states have internal predecessors, (168), 2 states have call successors, (3), 3 states 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 03:46:45,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:45,747 INFO L93 Difference]: Finished difference Result 435 states and 445 transitions. [2022-02-24 03:46:45,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-24 03:46:45,747 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 108 states have internal predecessors, (168), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 172 [2022-02-24 03:46:45,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:45,748 INFO L225 Difference]: With dead ends: 435 [2022-02-24 03:46:45,748 INFO L226 Difference]: Without dead ends: 278 [2022-02-24 03:46:45,750 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 216 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14407 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=12835, Invalid=34471, Unknown=0, NotChecked=0, Total=47306 [2022-02-24 03:46:45,751 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 427 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 6781 mSolverCounterSat, 469 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 7250 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 469 IncrementalHoareTripleChecker+Valid, 6781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:45,751 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 44 Invalid, 7250 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [469 Valid, 6781 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:46:45,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-24 03:46:45,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 278. [2022-02-24 03:46:45,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 273 states have (on average 1.0183150183150182) internal successors, (278), 273 states have internal predecessors, (278), 3 states have call successors, (3), 3 states 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 03:46:45,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 282 transitions. [2022-02-24 03:46:45,784 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 282 transitions. Word has length 172 [2022-02-24 03:46:45,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:45,784 INFO L470 AbstractCegarLoop]: Abstraction has 278 states and 282 transitions. [2022-02-24 03:46:45,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 108 states have internal predecessors, (168), 2 states have call successors, (3), 3 states 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 03:46:45,784 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 282 transitions. [2022-02-24 03:46:45,785 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-24 03:46:45,785 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:45,785 INFO L514 BasicCegarLoop]: trace histogram [57, 56, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:45,785 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 03:46:45,785 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:45,786 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:45,786 INFO L85 PathProgramCache]: Analyzing trace with hash 1506112465, now seen corresponding path program 49 times [2022-02-24 03:46:45,786 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:45,786 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1426911977] [2022-02-24 03:46:45,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:45,786 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:46,030 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:46,209 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:47,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:48,985 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:48,985 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1426911977] [2022-02-24 03:46:48,985 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1426911977] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:48,986 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:48,986 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [111] imperfect sequences [] total 111 [2022-02-24 03:46:48,986 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255248530] [2022-02-24 03:46:48,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:48,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2022-02-24 03:46:48,986 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:48,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2022-02-24 03:46:48,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4521, Invalid=8361, Unknown=0, NotChecked=0, Total=12882 [2022-02-24 03:46:48,988 INFO L87 Difference]: Start difference. First operand 278 states and 282 transitions. Second operand has 111 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 110 states have internal predecessors, (171), 2 states have call successors, (3), 3 states 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 03:46:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:46:53,810 INFO L93 Difference]: Finished difference Result 439 states and 449 transitions. [2022-02-24 03:46:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-24 03:46:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 110 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-02-24 03:46:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:46:53,811 INFO L225 Difference]: With dead ends: 439 [2022-02-24 03:46:53,811 INFO L226 Difference]: Without dead ends: 281 [2022-02-24 03:46:53,813 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 285 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14950 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=13320, Invalid=35742, Unknown=0, NotChecked=0, Total=49062 [2022-02-24 03:46:53,814 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 311 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 7041 mSolverCounterSat, 359 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 311 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 7400 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 359 IncrementalHoareTripleChecker+Valid, 7041 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:46:53,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [311 Valid, 59 Invalid, 7400 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [359 Valid, 7041 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:46:53,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-24 03:46:53,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 281. [2022-02-24 03:46:53,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 276 states have (on average 1.0181159420289856) internal successors, (281), 276 states have internal predecessors, (281), 3 states have call successors, (3), 3 states 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 03:46:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 285 transitions. [2022-02-24 03:46:53,847 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 285 transitions. Word has length 175 [2022-02-24 03:46:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:46:53,847 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 285 transitions. [2022-02-24 03:46:53,847 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 1.5405405405405406) internal successors, (171), 110 states have internal predecessors, (171), 2 states have call successors, (3), 3 states 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 03:46:53,847 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 285 transitions. [2022-02-24 03:46:53,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-02-24 03:46:53,848 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:46:53,848 INFO L514 BasicCegarLoop]: trace histogram [58, 57, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:46:53,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 03:46:53,848 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:46:53,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:46:53,848 INFO L85 PathProgramCache]: Analyzing trace with hash 1074113847, now seen corresponding path program 50 times [2022-02-24 03:46:53,848 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:46:53,848 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1123697473] [2022-02-24 03:46:53,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:46:53,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:46:54,056 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:54,200 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:46:54,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:55,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:46:55,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:46:55,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:46:57,026 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:46:57,027 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1123697473] [2022-02-24 03:46:57,027 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1123697473] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:46:57,027 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:46:57,027 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [113] imperfect sequences [] total 113 [2022-02-24 03:46:57,027 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327101053] [2022-02-24 03:46:57,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:46:57,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2022-02-24 03:46:57,027 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:46:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2022-02-24 03:46:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4738, Invalid=8602, Unknown=0, NotChecked=0, Total=13340 [2022-02-24 03:46:57,029 INFO L87 Difference]: Start difference. First operand 281 states and 285 transitions. Second operand has 113 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 112 states have internal predecessors, (174), 2 states have call successors, (3), 3 states 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 03:47:02,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:02,491 INFO L93 Difference]: Finished difference Result 443 states and 453 transitions. [2022-02-24 03:47:02,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-24 03:47:02,491 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 112 states have internal predecessors, (174), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 178 [2022-02-24 03:47:02,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:02,492 INFO L225 Difference]: With dead ends: 443 [2022-02-24 03:47:02,492 INFO L226 Difference]: Without dead ends: 284 [2022-02-24 03:47:02,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15514 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=13865, Invalid=36985, Unknown=0, NotChecked=0, Total=50850 [2022-02-24 03:47:02,495 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 193 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 7208 mSolverCounterSat, 241 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 7449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 241 IncrementalHoareTripleChecker+Valid, 7208 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:02,495 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 29 Invalid, 7449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [241 Valid, 7208 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-24 03:47:02,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-24 03:47:02,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 284. [2022-02-24 03:47:02,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 279 states have (on average 1.017921146953405) internal successors, (284), 279 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 03:47:02,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 288 transitions. [2022-02-24 03:47:02,529 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 288 transitions. Word has length 178 [2022-02-24 03:47:02,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:02,529 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 288 transitions. [2022-02-24 03:47:02,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 1.5398230088495575) internal successors, (174), 112 states have internal predecessors, (174), 2 states have call successors, (3), 3 states 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 03:47:02,529 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 288 transitions. [2022-02-24 03:47:02,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-02-24 03:47:02,530 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:02,530 INFO L514 BasicCegarLoop]: trace histogram [59, 58, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:02,530 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 03:47:02,530 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:02,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:02,531 INFO L85 PathProgramCache]: Analyzing trace with hash 1213034343, now seen corresponding path program 51 times [2022-02-24 03:47:02,531 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:02,531 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1197412960] [2022-02-24 03:47:02,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:02,531 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:02,730 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:02,874 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:02,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:04,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:04,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:04,374 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 03:47:05,819 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:05,820 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1197412960] [2022-02-24 03:47:05,820 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1197412960] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:05,820 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:05,820 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [115] imperfect sequences [] total 115 [2022-02-24 03:47:05,820 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917750646] [2022-02-24 03:47:05,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:05,820 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2022-02-24 03:47:05,820 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:05,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2022-02-24 03:47:05,822 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4908, Invalid=8898, Unknown=0, NotChecked=0, Total=13806 [2022-02-24 03:47:05,822 INFO L87 Difference]: Start difference. First operand 284 states and 288 transitions. Second operand has 115 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 114 states have internal predecessors, (177), 2 states have call successors, (3), 3 states 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 03:47:10,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:10,943 INFO L93 Difference]: Finished difference Result 447 states and 457 transitions. [2022-02-24 03:47:10,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-24 03:47:10,943 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 114 states have internal predecessors, (177), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-02-24 03:47:10,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:10,944 INFO L225 Difference]: With dead ends: 447 [2022-02-24 03:47:10,944 INFO L226 Difference]: Without dead ends: 287 [2022-02-24 03:47:10,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 228 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16077 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=14369, Invalid=38301, Unknown=0, NotChecked=0, Total=52670 [2022-02-24 03:47:10,947 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 322 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7464 mSolverCounterSat, 371 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 322 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 7835 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 371 IncrementalHoareTripleChecker+Valid, 7464 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:10,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [322 Valid, 34 Invalid, 7835 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [371 Valid, 7464 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-24 03:47:10,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-24 03:47:10,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 287. [2022-02-24 03:47:10,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 282 states have (on average 1.0177304964539007) internal successors, (287), 282 states have internal predecessors, (287), 3 states have call successors, (3), 3 states 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 03:47:10,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 291 transitions. [2022-02-24 03:47:10,981 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 291 transitions. Word has length 181 [2022-02-24 03:47:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:10,981 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 291 transitions. [2022-02-24 03:47:10,982 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 1.5391304347826087) internal successors, (177), 114 states have internal predecessors, (177), 2 states have call successors, (3), 3 states 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 03:47:10,982 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 291 transitions. [2022-02-24 03:47:10,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-02-24 03:47:10,982 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:10,982 INFO L514 BasicCegarLoop]: trace histogram [60, 59, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:10,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 03:47:10,983 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:10,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:10,983 INFO L85 PathProgramCache]: Analyzing trace with hash -259806047, now seen corresponding path program 52 times [2022-02-24 03:47:10,983 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:10,983 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1396203001] [2022-02-24 03:47:10,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:10,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:11,114 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:11,210 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:12,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:12,725 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:14,228 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:14,228 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1396203001] [2022-02-24 03:47:14,228 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1396203001] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:14,228 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:14,228 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [117] imperfect sequences [] total 117 [2022-02-24 03:47:14,228 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819858184] [2022-02-24 03:47:14,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:14,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2022-02-24 03:47:14,229 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:14,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2022-02-24 03:47:14,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5081, Invalid=9199, Unknown=0, NotChecked=0, Total=14280 [2022-02-24 03:47:14,231 INFO L87 Difference]: Start difference. First operand 287 states and 291 transitions. Second operand has 117 states, 117 states have (on average 1.5384615384615385) internal successors, (180), 116 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 03:47:19,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:19,527 INFO L93 Difference]: Finished difference Result 451 states and 461 transitions. [2022-02-24 03:47:19,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-24 03:47:19,528 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 1.5384615384615385) internal successors, (180), 116 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 03:47:19,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:19,528 INFO L225 Difference]: With dead ends: 451 [2022-02-24 03:47:19,528 INFO L226 Difference]: Without dead ends: 290 [2022-02-24 03:47:19,532 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 300 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16650 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=14882, Invalid=39640, Unknown=0, NotChecked=0, Total=54522 [2022-02-24 03:47:19,532 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 327 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 7718 mSolverCounterSat, 377 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 8095 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 377 IncrementalHoareTripleChecker+Valid, 7718 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:19,532 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 34 Invalid, 8095 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [377 Valid, 7718 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-24 03:47:19,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-24 03:47:19,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 290. [2022-02-24 03:47:19,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 285 states have (on average 1.0175438596491229) internal successors, (290), 285 states have internal predecessors, (290), 3 states have call successors, (3), 3 states 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 03:47:19,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 294 transitions. [2022-02-24 03:47:19,581 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 294 transitions. Word has length 184 [2022-02-24 03:47:19,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:19,581 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 294 transitions. [2022-02-24 03:47:19,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 1.5384615384615385) internal successors, (180), 116 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 03:47:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 294 transitions. [2022-02-24 03:47:19,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-24 03:47:19,582 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:19,582 INFO L514 BasicCegarLoop]: trace histogram [61, 60, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:19,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 03:47:19,582 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:19,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:19,583 INFO L85 PathProgramCache]: Analyzing trace with hash 297331965, now seen corresponding path program 53 times [2022-02-24 03:47:19,583 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:19,583 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1375344826] [2022-02-24 03:47:19,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:19,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:19,721 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:19,902 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:19,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:21,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:21,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:21,359 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 03:47:23,391 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:23,391 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1375344826] [2022-02-24 03:47:23,391 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1375344826] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:23,391 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:23,391 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [119] imperfect sequences [] total 119 [2022-02-24 03:47:23,391 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950371872] [2022-02-24 03:47:23,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:23,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2022-02-24 03:47:23,392 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:23,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2022-02-24 03:47:23,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5203, Invalid=9559, Unknown=0, NotChecked=0, Total=14762 [2022-02-24 03:47:23,394 INFO L87 Difference]: Start difference. First operand 290 states and 294 transitions. Second operand has 119 states, 119 states have (on average 1.5378151260504203) internal successors, (183), 118 states have internal predecessors, (183), 2 states have call successors, (3), 3 states 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 03:47:29,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:29,351 INFO L93 Difference]: Finished difference Result 455 states and 465 transitions. [2022-02-24 03:47:29,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-24 03:47:29,351 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 1.5378151260504203) internal successors, (183), 118 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-02-24 03:47:29,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:29,352 INFO L225 Difference]: With dead ends: 455 [2022-02-24 03:47:29,352 INFO L226 Difference]: Without dead ends: 293 [2022-02-24 03:47:29,354 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 236 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17222 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=15350, Invalid=41056, Unknown=0, NotChecked=0, Total=56406 [2022-02-24 03:47:29,355 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 330 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 8012 mSolverCounterSat, 383 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 330 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 8395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 383 IncrementalHoareTripleChecker+Valid, 8012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:29,355 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [330 Valid, 59 Invalid, 8395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [383 Valid, 8012 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:47:29,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-24 03:47:29,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 293. [2022-02-24 03:47:29,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 288 states have (on average 1.0173611111111112) internal successors, (293), 288 states have internal predecessors, (293), 3 states have call successors, (3), 3 states 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 03:47:29,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 297 transitions. [2022-02-24 03:47:29,388 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 297 transitions. Word has length 187 [2022-02-24 03:47:29,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:29,388 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 297 transitions. [2022-02-24 03:47:29,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 1.5378151260504203) internal successors, (183), 118 states have internal predecessors, (183), 2 states have call successors, (3), 3 states 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 03:47:29,389 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 297 transitions. [2022-02-24 03:47:29,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-02-24 03:47:29,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:29,389 INFO L514 BasicCegarLoop]: trace histogram [62, 61, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:29,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 03:47:29,390 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:29,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1894303221, now seen corresponding path program 54 times [2022-02-24 03:47:29,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:29,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440662922] [2022-02-24 03:47:29,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:29,547 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:29,700 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:30,899 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 03:47:32,478 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:32,479 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440662922] [2022-02-24 03:47:32,479 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [440662922] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:32,479 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:32,479 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [121] imperfect sequences [] total 121 [2022-02-24 03:47:32,479 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644186568] [2022-02-24 03:47:32,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:32,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2022-02-24 03:47:32,479 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:32,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2022-02-24 03:47:32,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5251, Invalid=9269, Unknown=0, NotChecked=0, Total=14520 [2022-02-24 03:47:32,481 INFO L87 Difference]: Start difference. First operand 293 states and 297 transitions. Second operand has 121 states, 121 states have (on average 1.537190082644628) internal successors, (186), 120 states have internal predecessors, (186), 2 states have call successors, (3), 3 states 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 03:47:38,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:38,138 INFO L93 Difference]: Finished difference Result 481 states and 513 transitions. [2022-02-24 03:47:38,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-24 03:47:38,140 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 1.537190082644628) internal successors, (186), 120 states have internal predecessors, (186), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 190 [2022-02-24 03:47:38,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:38,141 INFO L225 Difference]: With dead ends: 481 [2022-02-24 03:47:38,141 INFO L226 Difference]: Without dead ends: 318 [2022-02-24 03:47:38,144 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17333 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=15747, Invalid=41135, Unknown=0, NotChecked=0, Total=56882 [2022-02-24 03:47:38,144 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 331 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 8000 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 331 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 8464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 8000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:38,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [331 Valid, 44 Invalid, 8464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 8000 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-24 03:47:38,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 318 states. [2022-02-24 03:47:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 318 to 196. [2022-02-24 03:47:38,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0209424083769634) internal successors, (195), 191 states have internal predecessors, (195), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:47:38,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 199 transitions. [2022-02-24 03:47:38,167 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 199 transitions. Word has length 190 [2022-02-24 03:47:38,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:38,167 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 199 transitions. [2022-02-24 03:47:38,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 1.537190082644628) internal successors, (186), 120 states have internal predecessors, (186), 2 states have call successors, (3), 3 states 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 03:47:38,167 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 199 transitions. [2022-02-24 03:47:38,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-02-24 03:47:38,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:38,168 INFO L514 BasicCegarLoop]: trace histogram [64, 63, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:38,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 03:47:38,168 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:38,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:38,168 INFO L85 PathProgramCache]: Analyzing trace with hash 1002718126, now seen corresponding path program 55 times [2022-02-24 03:47:38,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:38,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1319495954] [2022-02-24 03:47:38,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:38,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:38,283 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:38,396 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:38,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:39,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:39,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:39,847 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:42,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:42,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1319495954] [2022-02-24 03:47:42,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1319495954] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:42,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:42,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-24 03:47:42,204 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019398493] [2022-02-24 03:47:42,204 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:42,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-24 03:47:42,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:42,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-24 03:47:42,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5622, Invalid=10380, Unknown=0, NotChecked=0, Total=16002 [2022-02-24 03:47:42,207 INFO L87 Difference]: Start difference. First operand 196 states and 199 transitions. Second operand has 124 states, 124 states have (on average 1.5403225806451613) internal successors, (191), 123 states have internal predecessors, (191), 2 states have call successors, (3), 3 states 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 03:47:50,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:47:50,760 INFO L93 Difference]: Finished difference Result 513 states and 524 transitions. [2022-02-24 03:47:50,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2022-02-24 03:47:50,760 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 1.5403225806451613) internal successors, (191), 123 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-02-24 03:47:50,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:47:50,761 INFO L225 Difference]: With dead ends: 513 [2022-02-24 03:47:50,761 INFO L226 Difference]: Without dead ends: 325 [2022-02-24 03:47:50,764 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 246 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18709 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=16597, Invalid=44659, Unknown=0, NotChecked=0, Total=61256 [2022-02-24 03:47:50,765 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 618 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 8744 mSolverCounterSat, 673 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 9417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 673 IncrementalHoareTripleChecker+Valid, 8744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:47:50,765 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [618 Valid, 19 Invalid, 9417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [673 Valid, 8744 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:47:50,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2022-02-24 03:47:50,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 325. [2022-02-24 03:47:50,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 320 states have (on average 1.015625) internal successors, (325), 320 states have internal predecessors, (325), 3 states have call successors, (3), 3 states 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 03:47:50,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 329 transitions. [2022-02-24 03:47:50,809 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 329 transitions. Word has length 195 [2022-02-24 03:47:50,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:47:50,809 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 329 transitions. [2022-02-24 03:47:50,810 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 1.5403225806451613) internal successors, (191), 123 states have internal predecessors, (191), 2 states have call successors, (3), 3 states 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 03:47:50,810 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 329 transitions. [2022-02-24 03:47:50,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-02-24 03:47:50,810 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:47:50,810 INFO L514 BasicCegarLoop]: trace histogram [65, 64, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:47:50,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 03:47:50,811 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:47:50,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:47:50,811 INFO L85 PathProgramCache]: Analyzing trace with hash -448207750, now seen corresponding path program 56 times [2022-02-24 03:47:50,811 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:47:50,811 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [282191446] [2022-02-24 03:47:50,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:47:50,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:47:51,015 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:51,178 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:47:51,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:52,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:47:52,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:47:52,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:47:54,569 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:47:54,569 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [282191446] [2022-02-24 03:47:54,569 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [282191446] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:47:54,569 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:47:54,569 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-24 03:47:54,569 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934848554] [2022-02-24 03:47:54,569 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:47:54,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-24 03:47:54,570 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:47:54,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-24 03:47:54,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5807, Invalid=10705, Unknown=0, NotChecked=0, Total=16512 [2022-02-24 03:47:54,572 INFO L87 Difference]: Start difference. First operand 325 states and 329 transitions. Second operand has 126 states, 126 states have (on average 1.5396825396825398) internal successors, (194), 125 states have internal predecessors, (194), 2 states have call successors, (3), 3 states 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 03:48:00,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:00,977 INFO L93 Difference]: Finished difference Result 517 states and 527 transitions. [2022-02-24 03:48:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-02-24 03:48:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 1.5396825396825398) internal successors, (194), 125 states have internal predecessors, (194), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 198 [2022-02-24 03:48:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:00,978 INFO L225 Difference]: With dead ends: 517 [2022-02-24 03:48:00,978 INFO L226 Difference]: Without dead ends: 328 [2022-02-24 03:48:00,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 71 SyntacticMatches, 2 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19327 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=17148, Invalid=46104, Unknown=0, NotChecked=0, Total=63252 [2022-02-24 03:48:00,982 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 282 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9016 mSolverCounterSat, 337 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 9353 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 337 IncrementalHoareTripleChecker+Valid, 9016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:00,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 54 Invalid, 9353 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [337 Valid, 9016 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-24 03:48:00,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2022-02-24 03:48:01,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 328. [2022-02-24 03:48:01,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 323 states have (on average 1.0154798761609907) internal successors, (328), 323 states have internal predecessors, (328), 3 states have call successors, (3), 3 states 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 03:48:01,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 332 transitions. [2022-02-24 03:48:01,038 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 332 transitions. Word has length 198 [2022-02-24 03:48:01,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:01,038 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 332 transitions. [2022-02-24 03:48:01,038 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 1.5396825396825398) internal successors, (194), 125 states have internal predecessors, (194), 2 states have call successors, (3), 3 states 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 03:48:01,038 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 332 transitions. [2022-02-24 03:48:01,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2022-02-24 03:48:01,039 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:01,039 INFO L514 BasicCegarLoop]: trace histogram [66, 65, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:01,039 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 03:48:01,039 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:01,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:01,039 INFO L85 PathProgramCache]: Analyzing trace with hash -264018684, now seen corresponding path program 57 times [2022-02-24 03:48:01,039 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:01,040 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2104514358] [2022-02-24 03:48:01,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:01,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:01,267 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:01,391 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:01,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:02,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:02,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:02,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:04,422 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:04,422 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2104514358] [2022-02-24 03:48:04,423 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2104514358] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:04,423 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:04,423 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-24 03:48:04,423 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540109046] [2022-02-24 03:48:04,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:04,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-24 03:48:04,423 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:04,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-24 03:48:04,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6053, Invalid=10977, Unknown=0, NotChecked=0, Total=17030 [2022-02-24 03:48:04,435 INFO L87 Difference]: Start difference. First operand 328 states and 332 transitions. Second operand has 128 states, 128 states have (on average 1.5390625) internal successors, (197), 127 states have internal predecessors, (197), 2 states have call successors, (3), 3 states 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 03:48:10,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:10,801 INFO L93 Difference]: Finished difference Result 521 states and 531 transitions. [2022-02-24 03:48:10,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2022-02-24 03:48:10,801 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 1.5390625) internal successors, (197), 127 states have internal predecessors, (197), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 201 [2022-02-24 03:48:10,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:10,802 INFO L225 Difference]: With dead ends: 521 [2022-02-24 03:48:10,802 INFO L226 Difference]: Without dead ends: 331 [2022-02-24 03:48:10,804 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 72 SyntacticMatches, 2 SemanticMatches, 254 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19967 ImplicationChecksByTransitivity, 6.5s TimeCoverageRelationStatistics Valid=17766, Invalid=47514, Unknown=0, NotChecked=0, Total=65280 [2022-02-24 03:48:10,805 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 287 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 9314 mSolverCounterSat, 341 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 287 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 9655 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 341 IncrementalHoareTripleChecker+Valid, 9314 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:10,805 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [287 Valid, 49 Invalid, 9655 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [341 Valid, 9314 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:48:10,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 331 states. [2022-02-24 03:48:10,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 331 to 331. [2022-02-24 03:48:10,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 326 states have (on average 1.0153374233128833) internal successors, (331), 326 states have internal predecessors, (331), 3 states have call successors, (3), 3 states 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 03:48:10,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 335 transitions. [2022-02-24 03:48:10,849 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 335 transitions. Word has length 201 [2022-02-24 03:48:10,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:10,849 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 335 transitions. [2022-02-24 03:48:10,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 1.5390625) internal successors, (197), 127 states have internal predecessors, (197), 2 states have call successors, (3), 3 states 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 03:48:10,849 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 335 transitions. [2022-02-24 03:48:10,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-02-24 03:48:10,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:10,850 INFO L514 BasicCegarLoop]: trace histogram [67, 66, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:10,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 03:48:10,850 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:10,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:10,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1201809884, now seen corresponding path program 58 times [2022-02-24 03:48:10,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:10,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354159128] [2022-02-24 03:48:10,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:10,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:11,112 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:11,300 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:11,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:12,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:12,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:12,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:14,658 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:14,658 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354159128] [2022-02-24 03:48:14,658 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [354159128] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:14,658 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:14,658 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-24 03:48:14,658 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948750667] [2022-02-24 03:48:14,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:14,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-24 03:48:14,658 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:14,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-24 03:48:14,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6245, Invalid=11311, Unknown=0, NotChecked=0, Total=17556 [2022-02-24 03:48:14,660 INFO L87 Difference]: Start difference. First operand 331 states and 335 transitions. Second operand has 130 states, 130 states have (on average 1.5384615384615385) internal successors, (200), 129 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 03:48:21,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:21,118 INFO L93 Difference]: Finished difference Result 525 states and 535 transitions. [2022-02-24 03:48:21,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2022-02-24 03:48:21,118 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 1.5384615384615385) internal successors, (200), 129 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 03:48:21,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:21,119 INFO L225 Difference]: With dead ends: 525 [2022-02-24 03:48:21,119 INFO L226 Difference]: Without dead ends: 334 [2022-02-24 03:48:21,123 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 258 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20605 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=18336, Invalid=49004, Unknown=0, NotChecked=0, Total=67340 [2022-02-24 03:48:21,123 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 219 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 9548 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 219 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 9824 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 9548 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:21,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [219 Valid, 39 Invalid, 9824 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 9548 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-24 03:48:21,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 334 states. [2022-02-24 03:48:21,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 334 to 334. [2022-02-24 03:48:21,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 334 states, 329 states have (on average 1.0151975683890577) internal successors, (334), 329 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 03:48:21,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 334 states to 334 states and 338 transitions. [2022-02-24 03:48:21,175 INFO L78 Accepts]: Start accepts. Automaton has 334 states and 338 transitions. Word has length 204 [2022-02-24 03:48:21,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:21,175 INFO L470 AbstractCegarLoop]: Abstraction has 334 states and 338 transitions. [2022-02-24 03:48:21,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 1.5384615384615385) internal successors, (200), 129 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 03:48:21,176 INFO L276 IsEmpty]: Start isEmpty. Operand 334 states and 338 transitions. [2022-02-24 03:48:21,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-02-24 03:48:21,176 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:21,176 INFO L514 BasicCegarLoop]: trace histogram [68, 67, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:21,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 03:48:21,176 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:21,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:21,177 INFO L85 PathProgramCache]: Analyzing trace with hash 525391962, now seen corresponding path program 59 times [2022-02-24 03:48:21,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:21,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1477492533] [2022-02-24 03:48:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:21,177 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:21,330 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:21,464 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:21,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:23,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:23,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:23,453 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 03:48:26,084 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:26,084 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1477492533] [2022-02-24 03:48:26,084 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1477492533] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:26,084 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:26,085 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-24 03:48:26,085 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159759320] [2022-02-24 03:48:26,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:26,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-24 03:48:26,085 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:26,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-24 03:48:26,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6440, Invalid=11650, Unknown=0, NotChecked=0, Total=18090 [2022-02-24 03:48:26,088 INFO L87 Difference]: Start difference. First operand 334 states and 338 transitions. Second operand has 132 states, 132 states have (on average 1.5378787878787878) internal successors, (203), 131 states have internal predecessors, (203), 2 states have call successors, (3), 3 states 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 03:48:35,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:35,323 INFO L93 Difference]: Finished difference Result 529 states and 539 transitions. [2022-02-24 03:48:35,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2022-02-24 03:48:35,323 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 132 states have (on average 1.5378787878787878) internal successors, (203), 131 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-02-24 03:48:35,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:35,324 INFO L225 Difference]: With dead ends: 529 [2022-02-24 03:48:35,324 INFO L226 Difference]: Without dead ends: 337 [2022-02-24 03:48:35,326 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 262 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21253 ImplicationChecksByTransitivity, 9.7s TimeCoverageRelationStatistics Valid=18915, Invalid=50517, Unknown=0, NotChecked=0, Total=69432 [2022-02-24 03:48:35,327 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 367 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 9864 mSolverCounterSat, 423 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 367 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 423 IncrementalHoareTripleChecker+Valid, 9864 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:35,327 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [367 Valid, 54 Invalid, 10287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [423 Valid, 9864 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-02-24 03:48:35,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2022-02-24 03:48:35,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 337. [2022-02-24 03:48:35,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 332 states have (on average 1.0150602409638554) internal successors, (337), 332 states have internal predecessors, (337), 3 states have call successors, (3), 3 states 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 03:48:35,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 341 transitions. [2022-02-24 03:48:35,372 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 341 transitions. Word has length 207 [2022-02-24 03:48:35,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:35,372 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 341 transitions. [2022-02-24 03:48:35,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 132 states have (on average 1.5378787878787878) internal successors, (203), 131 states have internal predecessors, (203), 2 states have call successors, (3), 3 states 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 03:48:35,372 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 341 transitions. [2022-02-24 03:48:35,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-02-24 03:48:35,373 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:35,373 INFO L514 BasicCegarLoop]: trace histogram [69, 68, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:35,373 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 03:48:35,374 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:35,374 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:35,374 INFO L85 PathProgramCache]: Analyzing trace with hash -2102426162, now seen corresponding path program 60 times [2022-02-24 03:48:35,374 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:35,374 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [294977846] [2022-02-24 03:48:35,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:35,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:35,620 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:35,793 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:35,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:37,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:37,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:37,520 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 03:48:39,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:39,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [294977846] [2022-02-24 03:48:39,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [294977846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:39,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:39,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-24 03:48:39,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340809871] [2022-02-24 03:48:39,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:39,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-24 03:48:39,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:39,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-24 03:48:39,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6577, Invalid=12055, Unknown=0, NotChecked=0, Total=18632 [2022-02-24 03:48:39,904 INFO L87 Difference]: Start difference. First operand 337 states and 341 transitions. Second operand has 134 states, 134 states have (on average 1.537313432835821) internal successors, (206), 133 states have internal predecessors, (206), 2 states have call successors, (3), 3 states 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 03:48:49,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:48:49,674 INFO L93 Difference]: Finished difference Result 533 states and 543 transitions. [2022-02-24 03:48:49,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 134 states. [2022-02-24 03:48:49,675 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 134 states have (on average 1.537313432835821) internal successors, (206), 133 states have internal predecessors, (206), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 210 [2022-02-24 03:48:49,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:48:49,676 INFO L225 Difference]: With dead ends: 533 [2022-02-24 03:48:49,676 INFO L226 Difference]: Without dead ends: 340 [2022-02-24 03:48:49,678 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 75 SyntacticMatches, 2 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21899 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=19442, Invalid=52114, Unknown=0, NotChecked=0, Total=71556 [2022-02-24 03:48:49,679 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 517 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 10177 mSolverCounterSat, 574 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 517 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 10751 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 574 IncrementalHoareTripleChecker+Valid, 10177 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:48:49,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [517 Valid, 54 Invalid, 10751 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [574 Valid, 10177 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 03:48:49,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2022-02-24 03:48:49,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 340. [2022-02-24 03:48:49,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 335 states have (on average 1.0149253731343284) internal successors, (340), 335 states have internal predecessors, (340), 3 states have call successors, (3), 3 states 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 03:48:49,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 344 transitions. [2022-02-24 03:48:49,732 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 344 transitions. Word has length 210 [2022-02-24 03:48:49,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:48:49,732 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 344 transitions. [2022-02-24 03:48:49,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 134 states have (on average 1.537313432835821) internal successors, (206), 133 states have internal predecessors, (206), 2 states have call successors, (3), 3 states 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 03:48:49,732 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 344 transitions. [2022-02-24 03:48:49,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 214 [2022-02-24 03:48:49,734 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:48:49,734 INFO L514 BasicCegarLoop]: trace histogram [70, 69, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:48:49,734 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 03:48:49,734 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:48:49,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:48:49,735 INFO L85 PathProgramCache]: Analyzing trace with hash 2101771696, now seen corresponding path program 61 times [2022-02-24 03:48:49,735 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:48:49,735 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2124331899] [2022-02-24 03:48:49,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:48:49,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:48:49,887 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:50,078 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:48:50,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:52,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:48:52,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:48:52,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:48:54,984 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:48:54,984 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2124331899] [2022-02-24 03:48:54,984 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2124331899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:48:54,984 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:48:54,984 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-24 03:48:54,984 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085650805] [2022-02-24 03:48:54,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:48:54,985 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-24 03:48:54,985 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:48:54,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-24 03:48:54,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6777, Invalid=12405, Unknown=0, NotChecked=0, Total=19182 [2022-02-24 03:48:54,988 INFO L87 Difference]: Start difference. First operand 340 states and 344 transitions. Second operand has 136 states, 136 states have (on average 1.536764705882353) internal successors, (209), 135 states have internal predecessors, (209), 2 states have call successors, (3), 3 states 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 03:49:05,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:05,110 INFO L93 Difference]: Finished difference Result 537 states and 547 transitions. [2022-02-24 03:49:05,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 136 states. [2022-02-24 03:49:05,111 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 136 states have (on average 1.536764705882353) internal successors, (209), 135 states have internal predecessors, (209), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 213 [2022-02-24 03:49:05,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:05,112 INFO L225 Difference]: With dead ends: 537 [2022-02-24 03:49:05,112 INFO L226 Difference]: Without dead ends: 343 [2022-02-24 03:49:05,115 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 270 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22567 ImplicationChecksByTransitivity, 10.5s TimeCoverageRelationStatistics Valid=20038, Invalid=53674, Unknown=0, NotChecked=0, Total=73712 [2022-02-24 03:49:05,115 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 303 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10423 mSolverCounterSat, 360 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 303 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 10783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 360 IncrementalHoareTripleChecker+Valid, 10423 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:05,120 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [303 Valid, 39 Invalid, 10783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [360 Valid, 10423 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:49:05,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-02-24 03:49:05,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 343. [2022-02-24 03:49:05,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 338 states have (on average 1.014792899408284) internal successors, (343), 338 states have internal predecessors, (343), 3 states have call successors, (3), 3 states 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 03:49:05,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 347 transitions. [2022-02-24 03:49:05,167 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 347 transitions. Word has length 213 [2022-02-24 03:49:05,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:05,167 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 347 transitions. [2022-02-24 03:49:05,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 136 states have (on average 1.536764705882353) internal successors, (209), 135 states have internal predecessors, (209), 2 states have call successors, (3), 3 states 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 03:49:05,168 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 347 transitions. [2022-02-24 03:49:05,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-02-24 03:49:05,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:05,168 INFO L514 BasicCegarLoop]: trace histogram [71, 70, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:05,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 03:49:05,169 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:05,169 INFO L85 PathProgramCache]: Analyzing trace with hash 725881720, now seen corresponding path program 62 times [2022-02-24 03:49:05,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:05,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [71361541] [2022-02-24 03:49:05,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:05,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:05,308 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:05,499 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:05,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:07,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:07,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:07,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:10,508 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:10,508 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [71361541] [2022-02-24 03:49:10,508 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [71361541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:10,508 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:10,508 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-24 03:49:10,509 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204561863] [2022-02-24 03:49:10,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:10,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-24 03:49:10,509 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:10,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-24 03:49:10,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7043, Invalid=12697, Unknown=0, NotChecked=0, Total=19740 [2022-02-24 03:49:10,511 INFO L87 Difference]: Start difference. First operand 343 states and 347 transitions. Second operand has 138 states, 138 states have (on average 1.536231884057971) internal successors, (212), 137 states have internal predecessors, (212), 2 states have call successors, (3), 3 states 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 03:49:19,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:19,769 INFO L93 Difference]: Finished difference Result 541 states and 551 transitions. [2022-02-24 03:49:19,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 138 states. [2022-02-24 03:49:19,769 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 1.536231884057971) internal successors, (212), 137 states have internal predecessors, (212), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 216 [2022-02-24 03:49:19,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:19,770 INFO L225 Difference]: With dead ends: 541 [2022-02-24 03:49:19,770 INFO L226 Difference]: Without dead ends: 346 [2022-02-24 03:49:19,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 77 SyntacticMatches, 2 SemanticMatches, 274 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23257 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=20706, Invalid=55194, Unknown=0, NotChecked=0, Total=75900 [2022-02-24 03:49:19,773 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 529 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 10738 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 529 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 11330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 10738 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:19,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [529 Valid, 69 Invalid, 11330 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 10738 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:49:19,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2022-02-24 03:49:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 346. [2022-02-24 03:49:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 341 states have (on average 1.0146627565982405) internal successors, (346), 341 states have internal predecessors, (346), 3 states have call successors, (3), 3 states 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 03:49:19,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 350 transitions. [2022-02-24 03:49:19,818 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 350 transitions. Word has length 216 [2022-02-24 03:49:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:19,819 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 350 transitions. [2022-02-24 03:49:19,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 1.536231884057971) internal successors, (212), 137 states have internal predecessors, (212), 2 states have call successors, (3), 3 states 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 03:49:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 350 transitions. [2022-02-24 03:49:19,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-02-24 03:49:19,819 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:19,820 INFO L514 BasicCegarLoop]: trace histogram [72, 71, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:19,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 03:49:19,820 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:19,820 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:19,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1363031302, now seen corresponding path program 63 times [2022-02-24 03:49:19,820 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:19,820 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1708263033] [2022-02-24 03:49:19,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:19,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:20,010 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:20,202 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:20,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:22,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:22,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:22,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:24,525 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:24,525 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1708263033] [2022-02-24 03:49:24,525 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1708263033] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:24,525 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:24,525 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-24 03:49:24,525 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848004681] [2022-02-24 03:49:24,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:24,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-24 03:49:24,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:24,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-24 03:49:24,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7250, Invalid=13056, Unknown=0, NotChecked=0, Total=20306 [2022-02-24 03:49:24,527 INFO L87 Difference]: Start difference. First operand 346 states and 350 transitions. Second operand has 140 states, 140 states have (on average 1.5357142857142858) internal successors, (215), 139 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 03:49:32,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:32,573 INFO L93 Difference]: Finished difference Result 545 states and 555 transitions. [2022-02-24 03:49:32,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 140 states. [2022-02-24 03:49:32,573 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 140 states have (on average 1.5357142857142858) internal successors, (215), 139 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 03:49:32,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:32,574 INFO L225 Difference]: With dead ends: 545 [2022-02-24 03:49:32,574 INFO L226 Difference]: Without dead ends: 349 [2022-02-24 03:49:32,577 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 278 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23945 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=21321, Invalid=56799, Unknown=0, NotChecked=0, Total=78120 [2022-02-24 03:49:32,577 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 539 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 10999 mSolverCounterSat, 600 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 539 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 11599 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 600 IncrementalHoareTripleChecker+Valid, 10999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:32,577 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [539 Valid, 39 Invalid, 11599 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [600 Valid, 10999 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-02-24 03:49:32,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-02-24 03:49:32,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 349. [2022-02-24 03:49:32,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 344 states have (on average 1.0145348837209303) internal successors, (349), 344 states have internal predecessors, (349), 3 states have call successors, (3), 3 states 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 03:49:32,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 353 transitions. [2022-02-24 03:49:32,623 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 353 transitions. Word has length 219 [2022-02-24 03:49:32,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:32,624 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 353 transitions. [2022-02-24 03:49:32,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 140 states have (on average 1.5357142857142858) internal successors, (215), 139 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 03:49:32,624 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 353 transitions. [2022-02-24 03:49:32,624 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-02-24 03:49:32,624 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:32,624 INFO L514 BasicCegarLoop]: trace histogram [73, 72, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:32,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 03:49:32,625 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:32,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:32,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1285447902, now seen corresponding path program 64 times [2022-02-24 03:49:32,625 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:32,625 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [447702948] [2022-02-24 03:49:32,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:32,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:32,757 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:32,958 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:34,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:34,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:36,552 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:36,552 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [447702948] [2022-02-24 03:49:36,553 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [447702948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:36,553 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:36,553 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-02-24 03:49:36,553 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884216811] [2022-02-24 03:49:36,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:36,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-24 03:49:36,553 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:36,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-24 03:49:36,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7244, Invalid=12778, Unknown=0, NotChecked=0, Total=20022 [2022-02-24 03:49:36,555 INFO L87 Difference]: Start difference. First operand 349 states and 353 transitions. Second operand has 142 states, 142 states have (on average 1.5352112676056338) internal successors, (218), 141 states have internal predecessors, (218), 2 states have call successors, (3), 3 states 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 03:49:44,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:44,076 INFO L93 Difference]: Finished difference Result 569 states and 599 transitions. [2022-02-24 03:49:44,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 142 states. [2022-02-24 03:49:44,077 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 142 states have (on average 1.5352112676056338) internal successors, (218), 141 states have internal predecessors, (218), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 222 [2022-02-24 03:49:44,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:44,086 INFO L225 Difference]: With dead ends: 569 [2022-02-24 03:49:44,086 INFO L226 Difference]: Without dead ends: 372 [2022-02-24 03:49:44,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 361 GetRequests, 80 SyntacticMatches, 2 SemanticMatches, 279 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24064 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=21726, Invalid=56954, Unknown=0, NotChecked=0, Total=78680 [2022-02-24 03:49:44,090 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 235 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 10971 mSolverCounterSat, 388 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 11359 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 388 IncrementalHoareTripleChecker+Valid, 10971 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:44,090 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [235 Valid, 44 Invalid, 11359 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [388 Valid, 10971 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-02-24 03:49:44,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 372 states. [2022-02-24 03:49:44,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 372 to 228. [2022-02-24 03:49:44,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 223 states have (on average 1.0179372197309418) internal successors, (227), 223 states have internal predecessors, (227), 3 states have call successors, (3), 3 states 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 03:49:44,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 231 transitions. [2022-02-24 03:49:44,120 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 231 transitions. Word has length 222 [2022-02-24 03:49:44,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:44,121 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 231 transitions. [2022-02-24 03:49:44,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 142 states have (on average 1.5352112676056338) internal successors, (218), 141 states have internal predecessors, (218), 2 states have call successors, (3), 3 states 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 03:49:44,121 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 231 transitions. [2022-02-24 03:49:44,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-02-24 03:49:44,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:44,123 INFO L514 BasicCegarLoop]: trace histogram [75, 74, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:44,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 03:49:44,123 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:44,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:44,123 INFO L85 PathProgramCache]: Analyzing trace with hash -130733705, now seen corresponding path program 65 times [2022-02-24 03:49:44,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:44,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598029930] [2022-02-24 03:49:44,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:44,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:44,395 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:44,601 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:44,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:47,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:49:47,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:49:47,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:49:50,111 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:49:50,112 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598029930] [2022-02-24 03:49:50,112 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598029930] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:49:50,112 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:49:50,112 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [145] imperfect sequences [] total 145 [2022-02-24 03:49:50,112 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711436890] [2022-02-24 03:49:50,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:49:50,112 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2022-02-24 03:49:50,112 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:49:50,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2022-02-24 03:49:50,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7743, Invalid=14013, Unknown=0, NotChecked=0, Total=21756 [2022-02-24 03:49:50,115 INFO L87 Difference]: Start difference. First operand 228 states and 231 transitions. Second operand has 145 states, 145 states have (on average 1.5379310344827586) internal successors, (223), 144 states have internal predecessors, (223), 2 states have call successors, (3), 3 states 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 03:49:58,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:49:58,758 INFO L93 Difference]: Finished difference Result 599 states and 610 transitions. [2022-02-24 03:49:58,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-24 03:49:58,759 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 1.5379310344827586) internal successors, (223), 144 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-02-24 03:49:58,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:49:58,773 INFO L225 Difference]: With dead ends: 599 [2022-02-24 03:49:58,773 INFO L226 Difference]: Without dead ends: 379 [2022-02-24 03:49:58,777 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 81 SyntacticMatches, 2 SemanticMatches, 288 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25694 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=22786, Invalid=61024, Unknown=0, NotChecked=0, Total=83810 [2022-02-24 03:49:58,782 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 243 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 11918 mSolverCounterSat, 308 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 243 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 12226 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 308 IncrementalHoareTripleChecker+Valid, 11918 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:49:58,783 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [243 Valid, 69 Invalid, 12226 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [308 Valid, 11918 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-24 03:49:58,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2022-02-24 03:49:58,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 379. [2022-02-24 03:49:58,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 374 states have (on average 1.0133689839572193) internal successors, (379), 374 states have internal predecessors, (379), 3 states have call successors, (3), 3 states 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 03:49:58,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 383 transitions. [2022-02-24 03:49:58,849 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 383 transitions. Word has length 227 [2022-02-24 03:49:58,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:49:58,849 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 383 transitions. [2022-02-24 03:49:58,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 1.5379310344827586) internal successors, (223), 144 states have internal predecessors, (223), 2 states have call successors, (3), 3 states 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 03:49:58,849 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 383 transitions. [2022-02-24 03:49:58,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-02-24 03:49:58,850 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:49:58,850 INFO L514 BasicCegarLoop]: trace histogram [76, 75, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:49:58,850 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 03:49:58,850 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:49:58,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:49:58,850 INFO L85 PathProgramCache]: Analyzing trace with hash -1632672815, now seen corresponding path program 66 times [2022-02-24 03:49:58,850 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:49:58,850 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210924899] [2022-02-24 03:49:58,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:49:58,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:49:59,015 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:59,117 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:49:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:00,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:00,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:02,999 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:03,000 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210924899] [2022-02-24 03:50:03,000 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210924899] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:03,000 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:03,000 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [147] imperfect sequences [] total 147 [2022-02-24 03:50:03,000 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827908642] [2022-02-24 03:50:03,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:03,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 147 states [2022-02-24 03:50:03,000 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:03,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 147 interpolants. [2022-02-24 03:50:03,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7960, Invalid=14390, Unknown=0, NotChecked=0, Total=22350 [2022-02-24 03:50:03,003 INFO L87 Difference]: Start difference. First operand 379 states and 383 transitions. Second operand has 147 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 146 states have internal predecessors, (226), 2 states have call successors, (3), 3 states 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 03:50:12,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:12,473 INFO L93 Difference]: Finished difference Result 603 states and 613 transitions. [2022-02-24 03:50:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-24 03:50:12,474 INFO L78 Accepts]: Start accepts. Automaton has has 147 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 146 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-02-24 03:50:12,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:12,475 INFO L225 Difference]: With dead ends: 603 [2022-02-24 03:50:12,475 INFO L226 Difference]: Without dead ends: 382 [2022-02-24 03:50:12,478 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 82 SyntacticMatches, 2 SemanticMatches, 292 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26417 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=23431, Invalid=62711, Unknown=0, NotChecked=0, Total=86142 [2022-02-24 03:50:12,479 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 327 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 12223 mSolverCounterSat, 391 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 12614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 391 IncrementalHoareTripleChecker+Valid, 12223 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:12,479 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 44 Invalid, 12614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [391 Valid, 12223 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-24 03:50:12,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 382 states. [2022-02-24 03:50:12,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 382 to 382. [2022-02-24 03:50:12,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 382 states, 377 states have (on average 1.013262599469496) internal successors, (382), 377 states have internal predecessors, (382), 3 states have call successors, (3), 3 states 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 03:50:12,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 382 states to 382 states and 386 transitions. [2022-02-24 03:50:12,536 INFO L78 Accepts]: Start accepts. Automaton has 382 states and 386 transitions. Word has length 230 [2022-02-24 03:50:12,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:12,536 INFO L470 AbstractCegarLoop]: Abstraction has 382 states and 386 transitions. [2022-02-24 03:50:12,536 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 147 states, 147 states have (on average 1.5374149659863945) internal successors, (226), 146 states have internal predecessors, (226), 2 states have call successors, (3), 3 states 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 03:50:12,536 INFO L276 IsEmpty]: Start isEmpty. Operand 382 states and 386 transitions. [2022-02-24 03:50:12,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-02-24 03:50:12,537 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:12,537 INFO L514 BasicCegarLoop]: trace histogram [77, 76, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:12,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 03:50:12,537 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:12,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:12,537 INFO L85 PathProgramCache]: Analyzing trace with hash -136141683, now seen corresponding path program 67 times [2022-02-24 03:50:12,537 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:12,537 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1631291773] [2022-02-24 03:50:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:12,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:12,734 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:12,940 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:12,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:15,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:17,691 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:17,692 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1631291773] [2022-02-24 03:50:17,692 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1631291773] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:17,692 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:17,692 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [149] imperfect sequences [] total 149 [2022-02-24 03:50:17,692 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490337972] [2022-02-24 03:50:17,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:17,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2022-02-24 03:50:17,692 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:17,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2022-02-24 03:50:17,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8112, Invalid=14840, Unknown=0, NotChecked=0, Total=22952 [2022-02-24 03:50:17,700 INFO L87 Difference]: Start difference. First operand 382 states and 386 transitions. Second operand has 149 states, 149 states have (on average 1.5369127516778522) internal successors, (229), 148 states have internal predecessors, (229), 2 states have call successors, (3), 3 states 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 03:50:27,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:27,848 INFO L93 Difference]: Finished difference Result 607 states and 617 transitions. [2022-02-24 03:50:27,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-24 03:50:27,848 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 1.5369127516778522) internal successors, (229), 148 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-02-24 03:50:27,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:27,849 INFO L225 Difference]: With dead ends: 607 [2022-02-24 03:50:27,849 INFO L226 Difference]: Without dead ends: 385 [2022-02-24 03:50:27,853 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 381 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 296 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27137 ImplicationChecksByTransitivity, 10.0s TimeCoverageRelationStatistics Valid=24017, Invalid=64489, Unknown=0, NotChecked=0, Total=88506 [2022-02-24 03:50:27,853 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 570 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 12519 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 570 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 13156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 12519 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:27,853 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [570 Valid, 29 Invalid, 13156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 12519 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2022-02-24 03:50:27,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 385 states. [2022-02-24 03:50:27,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 385 to 385. [2022-02-24 03:50:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 385 states, 380 states have (on average 1.013157894736842) internal successors, (385), 380 states have internal predecessors, (385), 3 states have call successors, (3), 3 states 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 03:50:27,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 385 states to 385 states and 389 transitions. [2022-02-24 03:50:27,906 INFO L78 Accepts]: Start accepts. Automaton has 385 states and 389 transitions. Word has length 233 [2022-02-24 03:50:27,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:27,907 INFO L470 AbstractCegarLoop]: Abstraction has 385 states and 389 transitions. [2022-02-24 03:50:27,907 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 1.5369127516778522) internal successors, (229), 148 states have internal predecessors, (229), 2 states have call successors, (3), 3 states 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 03:50:27,907 INFO L276 IsEmpty]: Start isEmpty. Operand 385 states and 389 transitions. [2022-02-24 03:50:27,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-02-24 03:50:27,907 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:27,908 INFO L514 BasicCegarLoop]: trace histogram [78, 77, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:27,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 03:50:27,908 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:27,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:27,908 INFO L85 PathProgramCache]: Analyzing trace with hash 145765307, now seen corresponding path program 68 times [2022-02-24 03:50:27,908 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:27,908 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671939849] [2022-02-24 03:50:27,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:27,909 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:28,080 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:28,208 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:28,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:29,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:29,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:29,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:50:32,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:32,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671939849] [2022-02-24 03:50:32,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [671939849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:32,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:32,268 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [151] imperfect sequences [] total 151 [2022-02-24 03:50:32,268 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451549538] [2022-02-24 03:50:32,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:32,268 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 151 states [2022-02-24 03:50:32,268 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:32,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 151 interpolants. [2022-02-24 03:50:32,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8403, Invalid=15159, Unknown=0, NotChecked=0, Total=23562 [2022-02-24 03:50:32,271 INFO L87 Difference]: Start difference. First operand 385 states and 389 transitions. Second operand has 151 states, 151 states have (on average 1.5364238410596027) internal successors, (232), 150 states have internal predecessors, (232), 2 states have call successors, (3), 3 states 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 03:50:42,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:50:42,278 INFO L93 Difference]: Finished difference Result 611 states and 621 transitions. [2022-02-24 03:50:42,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-24 03:50:42,278 INFO L78 Accepts]: Start accepts. Automaton has has 151 states, 151 states have (on average 1.5364238410596027) internal successors, (232), 150 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-02-24 03:50:42,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:50:42,279 INFO L225 Difference]: With dead ends: 611 [2022-02-24 03:50:42,279 INFO L226 Difference]: Without dead ends: 388 [2022-02-24 03:50:42,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 300 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27893 ImplicationChecksByTransitivity, 10.1s TimeCoverageRelationStatistics Valid=24748, Invalid=66154, Unknown=0, NotChecked=0, Total=90902 [2022-02-24 03:50:42,283 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 499 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 12821 mSolverCounterSat, 565 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 499 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 13386 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 565 IncrementalHoareTripleChecker+Valid, 12821 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:50:42,283 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [499 Valid, 34 Invalid, 13386 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [565 Valid, 12821 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-24 03:50:42,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 388 states. [2022-02-24 03:50:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 388 to 388. [2022-02-24 03:50:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 388 states, 383 states have (on average 1.0130548302872062) internal successors, (388), 383 states have internal predecessors, (388), 3 states have call successors, (3), 3 states 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 03:50:42,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 388 states to 388 states and 392 transitions. [2022-02-24 03:50:42,338 INFO L78 Accepts]: Start accepts. Automaton has 388 states and 392 transitions. Word has length 236 [2022-02-24 03:50:42,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:50:42,338 INFO L470 AbstractCegarLoop]: Abstraction has 388 states and 392 transitions. [2022-02-24 03:50:42,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 151 states, 151 states have (on average 1.5364238410596027) internal successors, (232), 150 states have internal predecessors, (232), 2 states have call successors, (3), 3 states 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 03:50:42,339 INFO L276 IsEmpty]: Start isEmpty. Operand 388 states and 392 transitions. [2022-02-24 03:50:42,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-24 03:50:42,339 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:50:42,339 INFO L514 BasicCegarLoop]: trace histogram [79, 78, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:50:42,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 03:50:42,340 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:50:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:50:42,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1523646883, now seen corresponding path program 69 times [2022-02-24 03:50:42,340 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:50:42,340 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [617278078] [2022-02-24 03:50:42,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:50:42,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:50:42,550 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:42,741 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:50:42,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:44,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:50:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:50:44,710 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 03:50:47,779 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:50:47,779 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [617278078] [2022-02-24 03:50:47,779 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [617278078] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:50:47,779 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:50:47,779 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [153] imperfect sequences [] total 153 [2022-02-24 03:50:47,779 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033966849] [2022-02-24 03:50:47,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:50:47,779 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2022-02-24 03:50:47,780 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:50:47,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2022-02-24 03:50:47,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8629, Invalid=15551, Unknown=0, NotChecked=0, Total=24180 [2022-02-24 03:50:47,782 INFO L87 Difference]: Start difference. First operand 388 states and 392 transitions. Second operand has 153 states, 153 states have (on average 1.5359477124183007) internal successors, (235), 152 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 03:51:00,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:00,031 INFO L93 Difference]: Finished difference Result 615 states and 625 transitions. [2022-02-24 03:51:00,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-24 03:51:00,031 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 153 states have (on average 1.5359477124183007) internal successors, (235), 152 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 03:51:00,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:00,032 INFO L225 Difference]: With dead ends: 615 [2022-02-24 03:51:00,032 INFO L226 Difference]: Without dead ends: 391 [2022-02-24 03:51:00,036 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 85 SyntacticMatches, 2 SemanticMatches, 304 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28646 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=25420, Invalid=67910, Unknown=0, NotChecked=0, Total=93330 [2022-02-24 03:51:00,036 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 588 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13175 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 588 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 13830 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 13175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:00,036 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [588 Valid, 54 Invalid, 13830 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 13175 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-24 03:51:00,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2022-02-24 03:51:00,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 391. [2022-02-24 03:51:00,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 391 states, 386 states have (on average 1.0129533678756477) internal successors, (391), 386 states have internal predecessors, (391), 3 states have call successors, (3), 3 states 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 03:51:00,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 391 states to 391 states and 395 transitions. [2022-02-24 03:51:00,094 INFO L78 Accepts]: Start accepts. Automaton has 391 states and 395 transitions. Word has length 239 [2022-02-24 03:51:00,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:00,094 INFO L470 AbstractCegarLoop]: Abstraction has 391 states and 395 transitions. [2022-02-24 03:51:00,094 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 153 states have (on average 1.5359477124183007) internal successors, (235), 152 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 03:51:00,095 INFO L276 IsEmpty]: Start isEmpty. Operand 391 states and 395 transitions. [2022-02-24 03:51:00,095 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-02-24 03:51:00,095 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:00,095 INFO L514 BasicCegarLoop]: trace histogram [80, 79, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:00,095 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 03:51:00,096 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:00,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:00,096 INFO L85 PathProgramCache]: Analyzing trace with hash -531811931, now seen corresponding path program 70 times [2022-02-24 03:51:00,096 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:00,096 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1497086827] [2022-02-24 03:51:00,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:00,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:00,298 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:00,540 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:03,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:03,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:03,440 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 03:51:06,760 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:06,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1497086827] [2022-02-24 03:51:06,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1497086827] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:06,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:06,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [155] imperfect sequences [] total 155 [2022-02-24 03:51:06,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145083416] [2022-02-24 03:51:06,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:06,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 155 states [2022-02-24 03:51:06,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:06,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 155 interpolants. [2022-02-24 03:51:06,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8858, Invalid=15948, Unknown=0, NotChecked=0, Total=24806 [2022-02-24 03:51:06,764 INFO L87 Difference]: Start difference. First operand 391 states and 395 transitions. Second operand has 155 states, 155 states have (on average 1.5354838709677419) internal successors, (238), 154 states have internal predecessors, (238), 2 states have call successors, (3), 3 states 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 03:51:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:16,499 INFO L93 Difference]: Finished difference Result 619 states and 629 transitions. [2022-02-24 03:51:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-24 03:51:16,499 INFO L78 Accepts]: Start accepts. Automaton has has 155 states, 155 states have (on average 1.5354838709677419) internal successors, (238), 154 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-02-24 03:51:16,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:16,500 INFO L225 Difference]: With dead ends: 619 [2022-02-24 03:51:16,500 INFO L226 Difference]: Without dead ends: 394 [2022-02-24 03:51:16,504 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 396 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 308 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29409 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=26101, Invalid=69689, Unknown=0, NotChecked=0, Total=95790 [2022-02-24 03:51:16,507 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 427 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 13520 mSolverCounterSat, 495 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 427 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 14015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 495 IncrementalHoareTripleChecker+Valid, 13520 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:16,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [427 Valid, 54 Invalid, 14015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [495 Valid, 13520 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-02-24 03:51:16,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2022-02-24 03:51:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 394. [2022-02-24 03:51:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 389 states have (on average 1.012853470437018) internal successors, (394), 389 states have internal predecessors, (394), 3 states have call successors, (3), 3 states 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 03:51:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 398 transitions. [2022-02-24 03:51:16,565 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 398 transitions. Word has length 242 [2022-02-24 03:51:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:16,565 INFO L470 AbstractCegarLoop]: Abstraction has 394 states and 398 transitions. [2022-02-24 03:51:16,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 155 states, 155 states have (on average 1.5354838709677419) internal successors, (238), 154 states have internal predecessors, (238), 2 states have call successors, (3), 3 states 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 03:51:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 398 transitions. [2022-02-24 03:51:16,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-02-24 03:51:16,566 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:16,566 INFO L514 BasicCegarLoop]: trace histogram [81, 80, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:16,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 03:51:16,566 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:16,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:16,566 INFO L85 PathProgramCache]: Analyzing trace with hash 1098260665, now seen corresponding path program 71 times [2022-02-24 03:51:16,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:16,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [26607008] [2022-02-24 03:51:16,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:16,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:16,728 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:16,937 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:16,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:18,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:18,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:18,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:20,363 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:20,363 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [26607008] [2022-02-24 03:51:20,363 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [26607008] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:20,363 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:20,363 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [157] imperfect sequences [] total 157 [2022-02-24 03:51:20,363 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032227298] [2022-02-24 03:51:20,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:20,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 157 states [2022-02-24 03:51:20,364 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:20,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 157 interpolants. [2022-02-24 03:51:20,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8852, Invalid=15640, Unknown=0, NotChecked=0, Total=24492 [2022-02-24 03:51:20,367 INFO L87 Difference]: Start difference. First operand 394 states and 398 transitions. Second operand has 157 states, 157 states have (on average 1.535031847133758) internal successors, (241), 156 states have internal predecessors, (241), 2 states have call successors, (3), 3 states 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 03:51:31,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:31,033 INFO L93 Difference]: Finished difference Result 637 states and 661 transitions. [2022-02-24 03:51:31,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-02-24 03:51:31,036 INFO L78 Accepts]: Start accepts. Automaton has has 157 states, 157 states have (on average 1.535031847133758) internal successors, (241), 156 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-02-24 03:51:31,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:31,037 INFO L225 Difference]: With dead ends: 637 [2022-02-24 03:51:31,037 INFO L226 Difference]: Without dead ends: 411 [2022-02-24 03:51:31,042 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 399 GetRequests, 87 SyntacticMatches, 3 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29612 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=26550, Invalid=69860, Unknown=0, NotChecked=0, Total=96410 [2022-02-24 03:51:31,042 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 593 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 13420 mSolverCounterSat, 426 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 593 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 13846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 426 IncrementalHoareTripleChecker+Valid, 13420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:31,042 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [593 Valid, 59 Invalid, 13846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [426 Valid, 13420 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2022-02-24 03:51:31,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 411 states. [2022-02-24 03:51:31,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 411 to 251. [2022-02-24 03:51:31,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 246 states have (on average 1.016260162601626) internal successors, (250), 246 states have internal predecessors, (250), 3 states have call successors, (3), 3 states 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 03:51:31,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 254 transitions. [2022-02-24 03:51:31,101 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 254 transitions. Word has length 245 [2022-02-24 03:51:31,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:31,101 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 254 transitions. [2022-02-24 03:51:31,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 157 states, 157 states have (on average 1.535031847133758) internal successors, (241), 156 states have internal predecessors, (241), 2 states have call successors, (3), 3 states 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 03:51:31,101 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 254 transitions. [2022-02-24 03:51:31,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2022-02-24 03:51:31,102 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:31,102 INFO L514 BasicCegarLoop]: trace histogram [83, 82, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:31,102 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 03:51:31,102 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:31,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:31,103 INFO L85 PathProgramCache]: Analyzing trace with hash 678618132, now seen corresponding path program 72 times [2022-02-24 03:51:31,103 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:31,103 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1734770705] [2022-02-24 03:51:31,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:31,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:31,259 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:31,477 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:31,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:34,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:34,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:34,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:51:38,437 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:51:38,437 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1734770705] [2022-02-24 03:51:38,437 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1734770705] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:51:38,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:51:38,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-02-24 03:51:38,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281754331] [2022-02-24 03:51:38,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:51:38,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-02-24 03:51:38,438 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:51:38,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-02-24 03:51:38,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9402, Invalid=17004, Unknown=0, NotChecked=0, Total=26406 [2022-02-24 03:51:38,442 INFO L87 Difference]: Start difference. First operand 251 states and 254 transitions. Second operand has 160 states, 160 states have (on average 1.5375) internal successors, (246), 159 states have internal predecessors, (246), 2 states have call successors, (3), 3 states 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 03:51:53,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:51:53,950 INFO L93 Difference]: Finished difference Result 661 states and 672 transitions. [2022-02-24 03:51:53,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2022-02-24 03:51:53,950 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 160 states have (on average 1.5375) internal successors, (246), 159 states have internal predecessors, (246), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 250 [2022-02-24 03:51:53,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:51:53,951 INFO L225 Difference]: With dead ends: 661 [2022-02-24 03:51:53,952 INFO L226 Difference]: Without dead ends: 418 [2022-02-24 03:51:53,955 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 89 SyntacticMatches, 2 SemanticMatches, 318 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31344 ImplicationChecksByTransitivity, 15.7s TimeCoverageRelationStatistics Valid=27719, Invalid=74361, Unknown=0, NotChecked=0, Total=102080 [2022-02-24 03:51:53,955 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 616 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 14508 mSolverCounterSat, 687 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 15195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 687 IncrementalHoareTripleChecker+Valid, 14508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:51:53,956 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [616 Valid, 59 Invalid, 15195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [687 Valid, 14508 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2022-02-24 03:51:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2022-02-24 03:51:54,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 418. [2022-02-24 03:51:54,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 418 states, 413 states have (on average 1.0121065375302662) internal successors, (418), 413 states have internal predecessors, (418), 3 states have call successors, (3), 3 states 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 03:51:54,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 418 states to 418 states and 422 transitions. [2022-02-24 03:51:54,031 INFO L78 Accepts]: Start accepts. Automaton has 418 states and 422 transitions. Word has length 250 [2022-02-24 03:51:54,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:51:54,031 INFO L470 AbstractCegarLoop]: Abstraction has 418 states and 422 transitions. [2022-02-24 03:51:54,031 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 160 states have (on average 1.5375) internal successors, (246), 159 states have internal predecessors, (246), 2 states have call successors, (3), 3 states 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 03:51:54,031 INFO L276 IsEmpty]: Start isEmpty. Operand 418 states and 422 transitions. [2022-02-24 03:51:54,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-02-24 03:51:54,032 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:51:54,032 INFO L514 BasicCegarLoop]: trace histogram [84, 83, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:51:54,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 03:51:54,033 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:51:54,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:51:54,033 INFO L85 PathProgramCache]: Analyzing trace with hash 450900266, now seen corresponding path program 73 times [2022-02-24 03:51:54,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:51:54,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [865935233] [2022-02-24 03:51:54,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:51:54,034 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:51:54,208 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:54,384 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:51:54,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:57,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:51:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:51:57,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:01,655 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:01,655 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [865935233] [2022-02-24 03:52:01,655 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [865935233] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:01,655 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:01,655 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-02-24 03:52:01,655 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187448008] [2022-02-24 03:52:01,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:01,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-24 03:52:01,656 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:01,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-24 03:52:01,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9641, Invalid=17419, Unknown=0, NotChecked=0, Total=27060 [2022-02-24 03:52:01,659 INFO L87 Difference]: Start difference. First operand 418 states and 422 transitions. Second operand has 162 states, 162 states have (on average 1.537037037037037) internal successors, (249), 161 states have internal predecessors, (249), 2 states have call successors, (3), 3 states 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 03:52:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:17,358 INFO L93 Difference]: Finished difference Result 665 states and 675 transitions. [2022-02-24 03:52:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 162 states. [2022-02-24 03:52:17,359 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 162 states have (on average 1.537037037037037) internal successors, (249), 161 states have internal predecessors, (249), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-02-24 03:52:17,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:17,360 INFO L225 Difference]: With dead ends: 665 [2022-02-24 03:52:17,360 INFO L226 Difference]: Without dead ends: 421 [2022-02-24 03:52:17,363 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 414 GetRequests, 90 SyntacticMatches, 2 SemanticMatches, 322 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32142 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=28430, Invalid=76222, Unknown=0, NotChecked=0, Total=104652 [2022-02-24 03:52:17,363 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 358 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 14886 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 15313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 14886 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:17,364 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 39 Invalid, 15313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 14886 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 03:52:17,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 421 states. [2022-02-24 03:52:17,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 421 to 421. [2022-02-24 03:52:17,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 421 states, 416 states have (on average 1.0120192307692308) internal successors, (421), 416 states have internal predecessors, (421), 3 states have call successors, (3), 3 states 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 03:52:17,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 421 states to 421 states and 425 transitions. [2022-02-24 03:52:17,431 INFO L78 Accepts]: Start accepts. Automaton has 421 states and 425 transitions. Word has length 253 [2022-02-24 03:52:17,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:17,431 INFO L470 AbstractCegarLoop]: Abstraction has 421 states and 425 transitions. [2022-02-24 03:52:17,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 162 states have (on average 1.537037037037037) internal successors, (249), 161 states have internal predecessors, (249), 2 states have call successors, (3), 3 states 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 03:52:17,431 INFO L276 IsEmpty]: Start isEmpty. Operand 421 states and 425 transitions. [2022-02-24 03:52:17,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2022-02-24 03:52:17,432 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:17,432 INFO L514 BasicCegarLoop]: trace histogram [85, 84, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:17,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 03:52:17,432 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:17,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:17,433 INFO L85 PathProgramCache]: Analyzing trace with hash 629073470, now seen corresponding path program 74 times [2022-02-24 03:52:17,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:17,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499887521] [2022-02-24 03:52:17,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:17,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:17,652 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:17,921 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:21,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:21,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:21,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:25,321 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:25,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499887521] [2022-02-24 03:52:25,321 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499887521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:25,321 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:25,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-02-24 03:52:25,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901614652] [2022-02-24 03:52:25,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:25,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-02-24 03:52:25,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:25,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-02-24 03:52:25,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9883, Invalid=17839, Unknown=0, NotChecked=0, Total=27722 [2022-02-24 03:52:25,325 INFO L87 Difference]: Start difference. First operand 421 states and 425 transitions. Second operand has 164 states, 164 states have (on average 1.5365853658536586) internal successors, (252), 163 states have internal predecessors, (252), 2 states have call successors, (3), 3 states 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 03:52:41,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:52:41,534 INFO L93 Difference]: Finished difference Result 669 states and 679 transitions. [2022-02-24 03:52:41,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 164 states. [2022-02-24 03:52:41,534 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 164 states have (on average 1.5365853658536586) internal successors, (252), 163 states have internal predecessors, (252), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 256 [2022-02-24 03:52:41,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:52:41,535 INFO L225 Difference]: With dead ends: 669 [2022-02-24 03:52:41,535 INFO L226 Difference]: Without dead ends: 424 [2022-02-24 03:52:41,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 419 GetRequests, 91 SyntacticMatches, 2 SemanticMatches, 326 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32950 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=29150, Invalid=78106, Unknown=0, NotChecked=0, Total=107256 [2022-02-24 03:52:41,539 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 629 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 15246 mSolverCounterSat, 699 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 629 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 15945 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 699 IncrementalHoareTripleChecker+Valid, 15246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:52:41,540 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [629 Valid, 54 Invalid, 15945 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [699 Valid, 15246 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-24 03:52:41,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 424 states. [2022-02-24 03:52:41,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 424 to 424. [2022-02-24 03:52:41,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 419 states have (on average 1.0119331742243436) internal successors, (424), 419 states have internal predecessors, (424), 3 states have call successors, (3), 3 states 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 03:52:41,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 428 transitions. [2022-02-24 03:52:41,619 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 428 transitions. Word has length 256 [2022-02-24 03:52:41,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:52:41,619 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 428 transitions. [2022-02-24 03:52:41,619 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 164 states have (on average 1.5365853658536586) internal successors, (252), 163 states have internal predecessors, (252), 2 states have call successors, (3), 3 states 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 03:52:41,619 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 428 transitions. [2022-02-24 03:52:41,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-24 03:52:41,620 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:52:41,620 INFO L514 BasicCegarLoop]: trace histogram [86, 85, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:52:41,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 03:52:41,621 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:52:41,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:52:41,621 INFO L85 PathProgramCache]: Analyzing trace with hash 393495552, now seen corresponding path program 75 times [2022-02-24 03:52:41,621 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:52:41,621 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1132251386] [2022-02-24 03:52:41,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:52:41,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:52:41,783 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:42,169 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:52:42,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:45,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:52:45,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:52:45,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:52:49,805 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:52:49,805 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1132251386] [2022-02-24 03:52:49,805 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1132251386] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:52:49,805 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:52:49,805 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-02-24 03:52:49,805 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630112104] [2022-02-24 03:52:49,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:52:49,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-02-24 03:52:49,806 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:52:49,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-02-24 03:52:49,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10128, Invalid=18264, Unknown=0, NotChecked=0, Total=28392 [2022-02-24 03:52:49,809 INFO L87 Difference]: Start difference. First operand 424 states and 428 transitions. Second operand has 166 states, 166 states have (on average 1.536144578313253) internal successors, (255), 165 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 03:53:06,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:06,396 INFO L93 Difference]: Finished difference Result 673 states and 683 transitions. [2022-02-24 03:53:06,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 166 states. [2022-02-24 03:53:06,397 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 166 states have (on average 1.536144578313253) internal successors, (255), 165 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 03:53:06,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:06,398 INFO L225 Difference]: With dead ends: 673 [2022-02-24 03:53:06,398 INFO L226 Difference]: Without dead ends: 427 [2022-02-24 03:53:06,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 424 GetRequests, 92 SyntacticMatches, 2 SemanticMatches, 330 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33768 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=29879, Invalid=80013, Unknown=0, NotChecked=0, Total=109892 [2022-02-24 03:53:06,402 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 637 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 15530 mSolverCounterSat, 709 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 637 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 16239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 709 IncrementalHoareTripleChecker+Valid, 15530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:06,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [637 Valid, 24 Invalid, 16239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [709 Valid, 15530 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-24 03:53:06,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2022-02-24 03:53:06,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 427. [2022-02-24 03:53:06,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 422 states have (on average 1.0118483412322274) internal successors, (427), 422 states have internal predecessors, (427), 3 states have call successors, (3), 3 states 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 03:53:06,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 431 transitions. [2022-02-24 03:53:06,482 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 431 transitions. Word has length 259 [2022-02-24 03:53:06,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:06,482 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 431 transitions. [2022-02-24 03:53:06,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 166 states have (on average 1.536144578313253) internal successors, (255), 165 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 03:53:06,482 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 431 transitions. [2022-02-24 03:53:06,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2022-02-24 03:53:06,483 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:06,483 INFO L514 BasicCegarLoop]: trace histogram [87, 86, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:06,483 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 03:53:06,483 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:06,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:06,484 INFO L85 PathProgramCache]: Analyzing trace with hash -648133016, now seen corresponding path program 76 times [2022-02-24 03:53:06,484 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:06,484 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [470918377] [2022-02-24 03:53:06,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:06,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:06,788 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:07,148 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:07,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:10,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:10,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:10,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:53:14,955 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:14,955 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [470918377] [2022-02-24 03:53:14,955 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [470918377] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:14,955 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:14,955 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-24 03:53:14,955 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456372137] [2022-02-24 03:53:14,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:14,956 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-24 03:53:14,956 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:14,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-24 03:53:14,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10376, Invalid=18694, Unknown=0, NotChecked=0, Total=29070 [2022-02-24 03:53:14,959 INFO L87 Difference]: Start difference. First operand 427 states and 431 transitions. Second operand has 168 states, 168 states have (on average 1.5357142857142858) internal successors, (258), 167 states have internal predecessors, (258), 2 states have call successors, (3), 3 states 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 03:53:31,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:31,436 INFO L93 Difference]: Finished difference Result 677 states and 687 transitions. [2022-02-24 03:53:31,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 168 states. [2022-02-24 03:53:31,437 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 168 states have (on average 1.5357142857142858) internal successors, (258), 167 states have internal predecessors, (258), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 262 [2022-02-24 03:53:31,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:31,438 INFO L225 Difference]: With dead ends: 677 [2022-02-24 03:53:31,438 INFO L226 Difference]: Without dead ends: 430 [2022-02-24 03:53:31,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 429 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 334 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34596 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=30617, Invalid=81943, Unknown=0, NotChecked=0, Total=112560 [2022-02-24 03:53:31,442 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 189 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 15859 mSolverCounterSat, 263 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 16122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 263 IncrementalHoareTripleChecker+Valid, 15859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:31,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 39 Invalid, 16122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [263 Valid, 15859 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-24 03:53:31,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 430 states. [2022-02-24 03:53:31,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 430 to 430. [2022-02-24 03:53:31,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 425 states have (on average 1.011764705882353) internal successors, (430), 425 states have internal predecessors, (430), 3 states have call successors, (3), 3 states 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 03:53:31,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 434 transitions. [2022-02-24 03:53:31,512 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 434 transitions. Word has length 262 [2022-02-24 03:53:31,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:31,513 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 434 transitions. [2022-02-24 03:53:31,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 168 states have (on average 1.5357142857142858) internal successors, (258), 167 states have internal predecessors, (258), 2 states have call successors, (3), 3 states 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 03:53:31,513 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 434 transitions. [2022-02-24 03:53:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-02-24 03:53:31,514 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:31,514 INFO L514 BasicCegarLoop]: trace histogram [88, 87, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:31,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 03:53:31,514 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:31,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:31,514 INFO L85 PathProgramCache]: Analyzing trace with hash 989194454, now seen corresponding path program 77 times [2022-02-24 03:53:31,514 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:31,515 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1661507521] [2022-02-24 03:53:31,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:31,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:31,685 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:31,846 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:31,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:34,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:34,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:34,958 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 03:53:38,761 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:53:38,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1661507521] [2022-02-24 03:53:38,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1661507521] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:53:38,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:53:38,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-24 03:53:38,762 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143106813] [2022-02-24 03:53:38,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:53:38,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-24 03:53:38,762 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:53:38,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-24 03:53:38,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10549, Invalid=19207, Unknown=0, NotChecked=0, Total=29756 [2022-02-24 03:53:38,766 INFO L87 Difference]: Start difference. First operand 430 states and 434 transitions. Second operand has 170 states, 170 states have (on average 1.535294117647059) internal successors, (261), 169 states have internal predecessors, (261), 2 states have call successors, (3), 3 states 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 03:53:54,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:53:54,651 INFO L93 Difference]: Finished difference Result 681 states and 691 transitions. [2022-02-24 03:53:54,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 170 states. [2022-02-24 03:53:54,651 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 170 states have (on average 1.535294117647059) internal successors, (261), 169 states have internal predecessors, (261), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-02-24 03:53:54,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:53:54,652 INFO L225 Difference]: With dead ends: 681 [2022-02-24 03:53:54,652 INFO L226 Difference]: Without dead ends: 433 [2022-02-24 03:53:54,658 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 434 GetRequests, 94 SyntacticMatches, 2 SemanticMatches, 338 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35420 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=31286, Invalid=83974, Unknown=0, NotChecked=0, Total=115260 [2022-02-24 03:53:54,659 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 651 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 16238 mSolverCounterSat, 720 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 16958 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 720 IncrementalHoareTripleChecker+Valid, 16238 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:53:54,659 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [651 Valid, 44 Invalid, 16958 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [720 Valid, 16238 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2022-02-24 03:53:54,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-02-24 03:53:54,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 433. [2022-02-24 03:53:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 433 states, 428 states have (on average 1.0116822429906542) internal successors, (433), 428 states have internal predecessors, (433), 3 states have call successors, (3), 3 states 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 03:53:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 433 states to 433 states and 437 transitions. [2022-02-24 03:53:54,751 INFO L78 Accepts]: Start accepts. Automaton has 433 states and 437 transitions. Word has length 265 [2022-02-24 03:53:54,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:53:54,751 INFO L470 AbstractCegarLoop]: Abstraction has 433 states and 437 transitions. [2022-02-24 03:53:54,751 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 170 states have (on average 1.535294117647059) internal successors, (261), 169 states have internal predecessors, (261), 2 states have call successors, (3), 3 states 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 03:53:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 433 states and 437 transitions. [2022-02-24 03:53:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 269 [2022-02-24 03:53:54,752 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:53:54,752 INFO L514 BasicCegarLoop]: trace histogram [89, 88, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:53:54,752 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 03:53:54,752 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:53:54,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:53:54,753 INFO L85 PathProgramCache]: Analyzing trace with hash 442442898, now seen corresponding path program 78 times [2022-02-24 03:53:54,753 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:53:54,753 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [741032595] [2022-02-24 03:53:54,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:53:54,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:53:54,964 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:55,158 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:53:55,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:58,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:53:58,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:53:58,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:01,451 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:01,451 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [741032595] [2022-02-24 03:54:01,451 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [741032595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:01,451 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:01,451 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2022-02-24 03:54:01,451 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476899303] [2022-02-24 03:54:01,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:01,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-02-24 03:54:01,452 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:01,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-02-24 03:54:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10881, Invalid=19569, Unknown=0, NotChecked=0, Total=30450 [2022-02-24 03:54:01,455 INFO L87 Difference]: Start difference. First operand 433 states and 437 transitions. Second operand has 172 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 171 states have internal predecessors, (264), 2 states have call successors, (3), 3 states 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 03:54:16,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:16,080 INFO L93 Difference]: Finished difference Result 685 states and 695 transitions. [2022-02-24 03:54:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2022-02-24 03:54:16,080 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 171 states have internal predecessors, (264), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 268 [2022-02-24 03:54:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:16,081 INFO L225 Difference]: With dead ends: 685 [2022-02-24 03:54:16,082 INFO L226 Difference]: Without dead ends: 436 [2022-02-24 03:54:16,086 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 439 GetRequests, 95 SyntacticMatches, 2 SemanticMatches, 342 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36282 ImplicationChecksByTransitivity, 14.6s TimeCoverageRelationStatistics Valid=32120, Invalid=85872, Unknown=0, NotChecked=0, Total=117992 [2022-02-24 03:54:16,087 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 563 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 16648 mSolverCounterSat, 641 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 17289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 641 IncrementalHoareTripleChecker+Valid, 16648 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:16,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [563 Valid, 59 Invalid, 17289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [641 Valid, 16648 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-24 03:54:16,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 436 states. [2022-02-24 03:54:16,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 436 to 436. [2022-02-24 03:54:16,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 436 states, 431 states have (on average 1.011600928074246) internal successors, (436), 431 states have internal predecessors, (436), 3 states have call successors, (3), 3 states 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 03:54:16,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 436 states to 436 states and 440 transitions. [2022-02-24 03:54:16,166 INFO L78 Accepts]: Start accepts. Automaton has 436 states and 440 transitions. Word has length 268 [2022-02-24 03:54:16,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:16,166 INFO L470 AbstractCegarLoop]: Abstraction has 436 states and 440 transitions. [2022-02-24 03:54:16,166 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 172 states have (on average 1.5348837209302326) internal successors, (264), 171 states have internal predecessors, (264), 2 states have call successors, (3), 3 states 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 03:54:16,166 INFO L276 IsEmpty]: Start isEmpty. Operand 436 states and 440 transitions. [2022-02-24 03:54:16,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-02-24 03:54:16,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:16,167 INFO L514 BasicCegarLoop]: trace histogram [90, 89, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:16,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 03:54:16,168 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:16,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:16,169 INFO L85 PathProgramCache]: Analyzing trace with hash 272039852, now seen corresponding path program 79 times [2022-02-24 03:54:16,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:16,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [491276394] [2022-02-24 03:54:16,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:16,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:16,343 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:16,532 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:16,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:20,072 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:20,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:20,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:24,825 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:24,825 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [491276394] [2022-02-24 03:54:24,825 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [491276394] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:24,825 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:24,826 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-02-24 03:54:24,826 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128574834] [2022-02-24 03:54:24,826 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:24,826 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-02-24 03:54:24,826 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:24,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-02-24 03:54:24,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11058, Invalid=20094, Unknown=0, NotChecked=0, Total=31152 [2022-02-24 03:54:24,828 INFO L87 Difference]: Start difference. First operand 436 states and 440 transitions. Second operand has 174 states, 174 states have (on average 1.5344827586206897) internal successors, (267), 173 states have internal predecessors, (267), 2 states have call successors, (3), 3 states 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 03:54:39,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:54:39,828 INFO L93 Difference]: Finished difference Result 689 states and 699 transitions. [2022-02-24 03:54:39,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 174 states. [2022-02-24 03:54:39,828 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 174 states have (on average 1.5344827586206897) internal successors, (267), 173 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-02-24 03:54:39,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:54:39,829 INFO L225 Difference]: With dead ends: 689 [2022-02-24 03:54:39,829 INFO L226 Difference]: Without dead ends: 439 [2022-02-24 03:54:39,833 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 444 GetRequests, 96 SyntacticMatches, 2 SemanticMatches, 346 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37126 ImplicationChecksByTransitivity, 17.0s TimeCoverageRelationStatistics Valid=32805, Invalid=87951, Unknown=0, NotChecked=0, Total=120756 [2022-02-24 03:54:39,833 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 382 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 17010 mSolverCounterSat, 460 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 17470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 460 IncrementalHoareTripleChecker+Valid, 17010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:54:39,834 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [382 Valid, 74 Invalid, 17470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [460 Valid, 17010 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-24 03:54:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-02-24 03:54:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 439. [2022-02-24 03:54:39,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 434 states have (on average 1.0115207373271888) internal successors, (439), 434 states have internal predecessors, (439), 3 states have call successors, (3), 3 states 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 03:54:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 443 transitions. [2022-02-24 03:54:39,903 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 443 transitions. Word has length 271 [2022-02-24 03:54:39,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:54:39,903 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 443 transitions. [2022-02-24 03:54:39,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 174 states have (on average 1.5344827586206897) internal successors, (267), 173 states have internal predecessors, (267), 2 states have call successors, (3), 3 states 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 03:54:39,903 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 443 transitions. [2022-02-24 03:54:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 275 [2022-02-24 03:54:39,904 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:54:39,904 INFO L514 BasicCegarLoop]: trace histogram [91, 90, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:54:39,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-24 03:54:39,904 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:54:39,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:54:39,905 INFO L85 PathProgramCache]: Analyzing trace with hash -1827692356, now seen corresponding path program 80 times [2022-02-24 03:54:39,905 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:54:39,905 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [514324595] [2022-02-24 03:54:39,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:54:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:54:40,021 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:40,188 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:54:40,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:43,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:54:43,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:54:43,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:54:47,696 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:54:47,696 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [514324595] [2022-02-24 03:54:47,696 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [514324595] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:54:47,696 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:54:47,696 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-24 03:54:47,696 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387267112] [2022-02-24 03:54:47,697 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:54:47,697 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-24 03:54:47,697 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:54:47,698 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-24 03:54:47,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11398, Invalid=20464, Unknown=0, NotChecked=0, Total=31862 [2022-02-24 03:54:47,699 INFO L87 Difference]: Start difference. First operand 439 states and 443 transitions. Second operand has 176 states, 176 states have (on average 1.5340909090909092) internal successors, (270), 175 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 03:55:03,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:03,312 INFO L93 Difference]: Finished difference Result 693 states and 703 transitions. [2022-02-24 03:55:03,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 176 states. [2022-02-24 03:55:03,313 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 176 states have (on average 1.5340909090909092) internal successors, (270), 175 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 03:55:03,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:03,314 INFO L225 Difference]: With dead ends: 693 [2022-02-24 03:55:03,314 INFO L226 Difference]: Without dead ends: 442 [2022-02-24 03:55:03,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 449 GetRequests, 97 SyntacticMatches, 2 SemanticMatches, 350 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38008 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=33659, Invalid=89893, Unknown=0, NotChecked=0, Total=123552 [2022-02-24 03:55:03,318 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 387 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17330 mSolverCounterSat, 465 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 387 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 17795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 465 IncrementalHoareTripleChecker+Valid, 17330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:03,318 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [387 Valid, 39 Invalid, 17795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [465 Valid, 17330 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-24 03:55:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 442 states. [2022-02-24 03:55:03,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 442 to 442. [2022-02-24 03:55:03,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 437 states have (on average 1.011441647597254) internal successors, (442), 437 states have internal predecessors, (442), 3 states have call successors, (3), 3 states 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 03:55:03,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 446 transitions. [2022-02-24 03:55:03,388 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 446 transitions. Word has length 274 [2022-02-24 03:55:03,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:03,388 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 446 transitions. [2022-02-24 03:55:03,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 176 states have (on average 1.5340909090909092) internal successors, (270), 175 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 03:55:03,388 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 446 transitions. [2022-02-24 03:55:03,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2022-02-24 03:55:03,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:03,389 INFO L514 BasicCegarLoop]: trace histogram [92, 91, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:03,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-24 03:55:03,389 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:03,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:03,390 INFO L85 PathProgramCache]: Analyzing trace with hash -523671422, now seen corresponding path program 81 times [2022-02-24 03:55:03,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:03,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1209670421] [2022-02-24 03:55:03,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:03,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:03,640 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:03,816 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:07,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:07,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:07,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:11,409 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:11,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1209670421] [2022-02-24 03:55:11,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1209670421] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:11,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:11,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [178] imperfect sequences [] total 178 [2022-02-24 03:55:11,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667144276] [2022-02-24 03:55:11,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:11,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2022-02-24 03:55:11,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:11,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2022-02-24 03:55:11,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11661, Invalid=20919, Unknown=0, NotChecked=0, Total=32580 [2022-02-24 03:55:11,418 INFO L87 Difference]: Start difference. First operand 442 states and 446 transitions. Second operand has 178 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 177 states have internal predecessors, (273), 2 states have call successors, (3), 3 states 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 03:55:26,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:26,656 INFO L93 Difference]: Finished difference Result 697 states and 707 transitions. [2022-02-24 03:55:26,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 178 states. [2022-02-24 03:55:26,657 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 177 states have internal predecessors, (273), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 277 [2022-02-24 03:55:26,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:26,658 INFO L225 Difference]: With dead ends: 697 [2022-02-24 03:55:26,658 INFO L226 Difference]: Without dead ends: 445 [2022-02-24 03:55:26,663 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 98 SyntacticMatches, 2 SemanticMatches, 354 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38886 ImplicationChecksByTransitivity, 16.2s TimeCoverageRelationStatistics Valid=34442, Invalid=91938, Unknown=0, NotChecked=0, Total=126380 [2022-02-24 03:55:26,663 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 677 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 17757 mSolverCounterSat, 756 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 677 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 18513 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 756 IncrementalHoareTripleChecker+Valid, 17757 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:26,663 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [677 Valid, 39 Invalid, 18513 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [756 Valid, 17757 Invalid, 0 Unknown, 0 Unchecked, 5.6s Time] [2022-02-24 03:55:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-02-24 03:55:26,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 445. [2022-02-24 03:55:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 440 states have (on average 1.0113636363636365) internal successors, (445), 440 states have internal predecessors, (445), 3 states have call successors, (3), 3 states 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 03:55:26,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 449 transitions. [2022-02-24 03:55:26,735 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 449 transitions. Word has length 277 [2022-02-24 03:55:26,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:26,735 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 449 transitions. [2022-02-24 03:55:26,735 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 1.5337078651685394) internal successors, (273), 177 states have internal predecessors, (273), 2 states have call successors, (3), 3 states 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 03:55:26,735 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 449 transitions. [2022-02-24 03:55:26,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 281 [2022-02-24 03:55:26,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:26,736 INFO L514 BasicCegarLoop]: trace histogram [93, 92, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:26,736 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-24 03:55:26,736 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:26,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:26,737 INFO L85 PathProgramCache]: Analyzing trace with hash 473815782, now seen corresponding path program 82 times [2022-02-24 03:55:26,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:26,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479366660] [2022-02-24 03:55:26,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:26,738 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:27,277 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:27,468 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:27,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:32,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:32,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:32,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:55:36,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:55:36,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479366660] [2022-02-24 03:55:36,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [479366660] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:55:36,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:55:36,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [180] imperfect sequences [] total 180 [2022-02-24 03:55:36,241 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91583914] [2022-02-24 03:55:36,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:55:36,241 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2022-02-24 03:55:36,241 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:55:36,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2022-02-24 03:55:36,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11927, Invalid=21379, Unknown=0, NotChecked=0, Total=33306 [2022-02-24 03:55:36,244 INFO L87 Difference]: Start difference. First operand 445 states and 449 transitions. Second operand has 180 states, 180 states have (on average 1.5333333333333334) internal successors, (276), 179 states have internal predecessors, (276), 2 states have call successors, (3), 3 states 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 03:55:51,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:55:51,248 INFO L93 Difference]: Finished difference Result 701 states and 711 transitions. [2022-02-24 03:55:51,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 180 states. [2022-02-24 03:55:51,248 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 180 states have (on average 1.5333333333333334) internal successors, (276), 179 states have internal predecessors, (276), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 280 [2022-02-24 03:55:51,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:55:51,250 INFO L225 Difference]: With dead ends: 701 [2022-02-24 03:55:51,250 INFO L226 Difference]: Without dead ends: 448 [2022-02-24 03:55:51,256 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 459 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 358 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39774 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=35234, Invalid=94006, Unknown=0, NotChecked=0, Total=129240 [2022-02-24 03:55:51,257 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 783 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 18091 mSolverCounterSat, 859 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 783 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 859 IncrementalHoareTripleChecker+Valid, 18091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:55:51,257 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [783 Valid, 19 Invalid, 18950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [859 Valid, 18091 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2022-02-24 03:55:51,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2022-02-24 03:55:51,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 448. [2022-02-24 03:55:51,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 448 states, 443 states have (on average 1.0112866817155757) internal successors, (448), 443 states have internal predecessors, (448), 3 states have call successors, (3), 3 states 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 03:55:51,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 448 states to 448 states and 452 transitions. [2022-02-24 03:55:51,365 INFO L78 Accepts]: Start accepts. Automaton has 448 states and 452 transitions. Word has length 280 [2022-02-24 03:55:51,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:55:51,365 INFO L470 AbstractCegarLoop]: Abstraction has 448 states and 452 transitions. [2022-02-24 03:55:51,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 180 states have (on average 1.5333333333333334) internal successors, (276), 179 states have internal predecessors, (276), 2 states have call successors, (3), 3 states 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 03:55:51,366 INFO L276 IsEmpty]: Start isEmpty. Operand 448 states and 452 transitions. [2022-02-24 03:55:51,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-02-24 03:55:51,366 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:55:51,367 INFO L514 BasicCegarLoop]: trace histogram [94, 93, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:55:51,367 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-24 03:55:51,367 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:55:51,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:55:51,367 INFO L85 PathProgramCache]: Analyzing trace with hash 1526661976, now seen corresponding path program 83 times [2022-02-24 03:55:51,367 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:55:51,367 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1715980441] [2022-02-24 03:55:51,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:55:51,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:55:51,493 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:51,667 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:55:51,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:55,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:55:55,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:55:55,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:00,175 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:00,175 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1715980441] [2022-02-24 03:56:00,175 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1715980441] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:00,176 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:00,176 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-02-24 03:56:00,176 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894057790] [2022-02-24 03:56:00,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:00,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-02-24 03:56:00,176 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:00,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-02-24 03:56:00,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12196, Invalid=21844, Unknown=0, NotChecked=0, Total=34040 [2022-02-24 03:56:00,180 INFO L87 Difference]: Start difference. First operand 448 states and 452 transitions. Second operand has 182 states, 182 states have (on average 1.532967032967033) internal successors, (279), 181 states have internal predecessors, (279), 2 states have call successors, (3), 3 states 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 03:56:19,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:19,003 INFO L93 Difference]: Finished difference Result 705 states and 715 transitions. [2022-02-24 03:56:19,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2022-02-24 03:56:19,003 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 1.532967032967033) internal successors, (279), 181 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-02-24 03:56:19,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:19,004 INFO L225 Difference]: With dead ends: 705 [2022-02-24 03:56:19,004 INFO L226 Difference]: Without dead ends: 451 [2022-02-24 03:56:19,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 100 SyntacticMatches, 2 SemanticMatches, 362 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40672 ImplicationChecksByTransitivity, 19.7s TimeCoverageRelationStatistics Valid=36035, Invalid=96097, Unknown=0, NotChecked=0, Total=132132 [2022-02-24 03:56:19,010 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 595 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 18516 mSolverCounterSat, 671 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 595 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 19187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 671 IncrementalHoareTripleChecker+Valid, 18516 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:19,010 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [595 Valid, 39 Invalid, 19187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [671 Valid, 18516 Invalid, 0 Unknown, 0 Unchecked, 6.5s Time] [2022-02-24 03:56:19,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 451 states. [2022-02-24 03:56:19,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 451 to 451. [2022-02-24 03:56:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 446 states have (on average 1.0112107623318385) internal successors, (451), 446 states have internal predecessors, (451), 3 states have call successors, (3), 3 states 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 03:56:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 455 transitions. [2022-02-24 03:56:19,085 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 455 transitions. Word has length 283 [2022-02-24 03:56:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:19,085 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 455 transitions. [2022-02-24 03:56:19,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 1.532967032967033) internal successors, (279), 181 states have internal predecessors, (279), 2 states have call successors, (3), 3 states 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 03:56:19,085 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 455 transitions. [2022-02-24 03:56:19,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 287 [2022-02-24 03:56:19,086 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:19,086 INFO L514 BasicCegarLoop]: trace histogram [95, 94, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:19,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-24 03:56:19,087 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:19,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:19,087 INFO L85 PathProgramCache]: Analyzing trace with hash 385348368, now seen corresponding path program 84 times [2022-02-24 03:56:19,087 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:19,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1598533590] [2022-02-24 03:56:19,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:19,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:19,608 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:19,897 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:19,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:24,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:24,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:24,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:29,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:29,509 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1598533590] [2022-02-24 03:56:29,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1598533590] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:29,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:29,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [184] imperfect sequences [] total 184 [2022-02-24 03:56:29,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905928780] [2022-02-24 03:56:29,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:29,510 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2022-02-24 03:56:29,510 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:29,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2022-02-24 03:56:29,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12468, Invalid=22314, Unknown=0, NotChecked=0, Total=34782 [2022-02-24 03:56:29,514 INFO L87 Difference]: Start difference. First operand 451 states and 455 transitions. Second operand has 184 states, 184 states have (on average 1.5326086956521738) internal successors, (282), 183 states have internal predecessors, (282), 2 states have call successors, (3), 3 states 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 03:56:47,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:56:47,944 INFO L93 Difference]: Finished difference Result 709 states and 719 transitions. [2022-02-24 03:56:47,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 184 states. [2022-02-24 03:56:47,944 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 184 states have (on average 1.5326086956521738) internal successors, (282), 183 states have internal predecessors, (282), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 286 [2022-02-24 03:56:47,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:56:47,945 INFO L225 Difference]: With dead ends: 709 [2022-02-24 03:56:47,945 INFO L226 Difference]: Without dead ends: 454 [2022-02-24 03:56:47,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 101 SyntacticMatches, 2 SemanticMatches, 366 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41580 ImplicationChecksByTransitivity, 19.6s TimeCoverageRelationStatistics Valid=36845, Invalid=98211, Unknown=0, NotChecked=0, Total=135056 [2022-02-24 03:56:47,951 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 502 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 18883 mSolverCounterSat, 584 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 19467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 584 IncrementalHoareTripleChecker+Valid, 18883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:56:47,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 59 Invalid, 19467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [584 Valid, 18883 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-24 03:56:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2022-02-24 03:56:48,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 454. [2022-02-24 03:56:48,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 454 states, 449 states have (on average 1.0111358574610245) internal successors, (454), 449 states have internal predecessors, (454), 3 states have call successors, (3), 3 states 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 03:56:48,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 454 states to 454 states and 458 transitions. [2022-02-24 03:56:48,026 INFO L78 Accepts]: Start accepts. Automaton has 454 states and 458 transitions. Word has length 286 [2022-02-24 03:56:48,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:56:48,026 INFO L470 AbstractCegarLoop]: Abstraction has 454 states and 458 transitions. [2022-02-24 03:56:48,026 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 184 states have (on average 1.5326086956521738) internal successors, (282), 183 states have internal predecessors, (282), 2 states have call successors, (3), 3 states 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 03:56:48,027 INFO L276 IsEmpty]: Start isEmpty. Operand 454 states and 458 transitions. [2022-02-24 03:56:48,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 290 [2022-02-24 03:56:48,027 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:56:48,028 INFO L514 BasicCegarLoop]: trace histogram [96, 95, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:56:48,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-24 03:56:48,028 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:56:48,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:56:48,028 INFO L85 PathProgramCache]: Analyzing trace with hash 938061870, now seen corresponding path program 85 times [2022-02-24 03:56:48,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:56:48,028 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1853963380] [2022-02-24 03:56:48,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:56:48,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:56:48,325 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:48,953 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:56:49,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:54,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:56:54,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:56:54,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:56:58,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:56:58,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1853963380] [2022-02-24 03:56:58,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1853963380] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:56:58,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:56:58,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [186] imperfect sequences [] total 186 [2022-02-24 03:56:58,252 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931499949] [2022-02-24 03:56:58,252 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:56:58,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-02-24 03:56:58,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:56:58,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-02-24 03:56:58,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12743, Invalid=22789, Unknown=0, NotChecked=0, Total=35532 [2022-02-24 03:56:58,256 INFO L87 Difference]: Start difference. First operand 454 states and 458 transitions. Second operand has 186 states, 186 states have (on average 1.532258064516129) internal successors, (285), 185 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 03:57:17,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:17,551 INFO L93 Difference]: Finished difference Result 713 states and 723 transitions. [2022-02-24 03:57:17,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 186 states. [2022-02-24 03:57:17,551 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 186 states have (on average 1.532258064516129) internal successors, (285), 185 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 03:57:17,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:17,552 INFO L225 Difference]: With dead ends: 713 [2022-02-24 03:57:17,553 INFO L226 Difference]: Without dead ends: 457 [2022-02-24 03:57:17,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 474 GetRequests, 102 SyntacticMatches, 2 SemanticMatches, 370 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42498 ImplicationChecksByTransitivity, 20.2s TimeCoverageRelationStatistics Valid=37664, Invalid=100348, Unknown=0, NotChecked=0, Total=138012 [2022-02-24 03:57:17,559 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 306 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 19260 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 19650 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 19260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:17,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [306 Valid, 44 Invalid, 19650 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 19260 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2022-02-24 03:57:17,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 457 states. [2022-02-24 03:57:17,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 457 to 457. [2022-02-24 03:57:17,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 457 states, 452 states have (on average 1.011061946902655) internal successors, (457), 452 states have internal predecessors, (457), 3 states have call successors, (3), 3 states 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 03:57:17,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 457 states to 457 states and 461 transitions. [2022-02-24 03:57:17,651 INFO L78 Accepts]: Start accepts. Automaton has 457 states and 461 transitions. Word has length 289 [2022-02-24 03:57:17,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:17,651 INFO L470 AbstractCegarLoop]: Abstraction has 457 states and 461 transitions. [2022-02-24 03:57:17,651 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 186 states have (on average 1.532258064516129) internal successors, (285), 185 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 03:57:17,652 INFO L276 IsEmpty]: Start isEmpty. Operand 457 states and 461 transitions. [2022-02-24 03:57:17,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 293 [2022-02-24 03:57:17,652 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:17,653 INFO L514 BasicCegarLoop]: trace histogram [97, 96, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:17,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-24 03:57:17,653 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:17,653 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:17,653 INFO L85 PathProgramCache]: Analyzing trace with hash -963901126, now seen corresponding path program 86 times [2022-02-24 03:57:17,653 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:17,653 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1503121832] [2022-02-24 03:57:17,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:17,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:17,890 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:18,197 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:18,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:24,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:24,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:57:29,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:57:29,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1503121832] [2022-02-24 03:57:29,795 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1503121832] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:57:29,795 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:57:29,795 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-02-24 03:57:29,795 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951314864] [2022-02-24 03:57:29,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:57:29,796 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-02-24 03:57:29,796 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:57:29,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-02-24 03:57:29,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13021, Invalid=23269, Unknown=0, NotChecked=0, Total=36290 [2022-02-24 03:57:29,799 INFO L87 Difference]: Start difference. First operand 457 states and 461 transitions. Second operand has 188 states, 188 states have (on average 1.5319148936170213) internal successors, (288), 187 states have internal predecessors, (288), 2 states have call successors, (3), 3 states 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 03:57:47,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:57:47,114 INFO L93 Difference]: Finished difference Result 717 states and 727 transitions. [2022-02-24 03:57:47,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 188 states. [2022-02-24 03:57:47,115 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 188 states have (on average 1.5319148936170213) internal successors, (288), 187 states have internal predecessors, (288), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 292 [2022-02-24 03:57:47,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:57:47,116 INFO L225 Difference]: With dead ends: 717 [2022-02-24 03:57:47,116 INFO L226 Difference]: Without dead ends: 460 [2022-02-24 03:57:47,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 479 GetRequests, 103 SyntacticMatches, 2 SemanticMatches, 374 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43426 ImplicationChecksByTransitivity, 21.3s TimeCoverageRelationStatistics Valid=38492, Invalid=102508, Unknown=0, NotChecked=0, Total=141000 [2022-02-24 03:57:47,120 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 511 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 19666 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 511 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 20258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 19666 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:57:47,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [511 Valid, 69 Invalid, 20258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 19666 Invalid, 0 Unknown, 0 Unchecked, 6.4s Time] [2022-02-24 03:57:47,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 460 states. [2022-02-24 03:57:47,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 460 to 460. [2022-02-24 03:57:47,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 460 states, 455 states have (on average 1.010989010989011) internal successors, (460), 455 states have internal predecessors, (460), 3 states have call successors, (3), 3 states 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 03:57:47,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 460 states to 460 states and 464 transitions. [2022-02-24 03:57:47,208 INFO L78 Accepts]: Start accepts. Automaton has 460 states and 464 transitions. Word has length 292 [2022-02-24 03:57:47,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:57:47,208 INFO L470 AbstractCegarLoop]: Abstraction has 460 states and 464 transitions. [2022-02-24 03:57:47,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 188 states have (on average 1.5319148936170213) internal successors, (288), 187 states have internal predecessors, (288), 2 states have call successors, (3), 3 states 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 03:57:47,209 INFO L276 IsEmpty]: Start isEmpty. Operand 460 states and 464 transitions. [2022-02-24 03:57:47,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-02-24 03:57:47,210 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:57:47,210 INFO L514 BasicCegarLoop]: trace histogram [98, 97, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:57:47,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-24 03:57:47,210 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:57:47,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:57:47,210 INFO L85 PathProgramCache]: Analyzing trace with hash -514109692, now seen corresponding path program 87 times [2022-02-24 03:57:47,210 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:57:47,210 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117257092] [2022-02-24 03:57:47,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:57:47,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:57:47,445 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:48,071 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-24 03:57:48,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:54,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:57:54,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:57:54,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.