/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/Mono6_1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 03:29:37,351 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 03:29:37,353 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 03:29:37,394 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 03:29:37,426 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 03:29:37,427 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 03:29:37,433 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 03:29:37,435 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 03:29:37,448 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 03:29:37,448 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 03:29:37,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 03:29:37,449 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 03:29:37,449 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 03:29:37,450 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 03:29:37,450 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 03:29:37,450 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 03:29:37,450 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 03:29:37,450 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 03:29:37,450 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 03:29:37,451 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:29:37,451 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 03:29:37,451 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=QVASR [2022-02-24 03:29:37,451 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 03:29:37,620 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 03:29:37,636 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 03:29:37,638 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 03:29:37,638 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 03:29:37,640 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 03:29:37,641 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-02-24 03:29:37,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed80832be/312895ef14d146858ffe78398c06aa95/FLAGd7bfda542 [2022-02-24 03:29:38,040 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 03:29:38,041 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops-crafted-1/Mono6_1.c [2022-02-24 03:29:38,048 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed80832be/312895ef14d146858ffe78398c06aa95/FLAGd7bfda542 [2022-02-24 03:29:38,059 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ed80832be/312895ef14d146858ffe78398c06aa95 [2022-02-24 03:29:38,062 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 03:29:38,063 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 03:29:38,065 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 03:29:38,065 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 03:29:38,067 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 03:29:38,068 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,068 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@4b99fbf4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38, skipping insertion in model container [2022-02-24 03:29:38,068 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,073 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 03:29:38,082 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 03:29:38,218 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/Mono6_1.c[311,324] [2022-02-24 03:29:38,226 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:29:38,233 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 03:29:38,240 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/Mono6_1.c[311,324] [2022-02-24 03:29:38,242 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 03:29:38,250 INFO L208 MainTranslator]: Completed translation [2022-02-24 03:29:38,251 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38 WrapperNode [2022-02-24 03:29:38,251 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 03:29:38,252 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 03:29:38,252 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 03:29:38,252 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 03:29:38,259 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,259 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,264 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,264 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,267 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,270 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,273 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,274 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 03:29:38,275 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 03:29:38,275 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 03:29:38,276 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 03:29:38,277 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (1/1) ... [2022-02-24 03:29:38,282 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 03:29:38,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 03:29:38,297 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 03:29:38,315 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 03:29:38,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 03:29:38,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 03:29:38,324 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 03:29:38,325 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 03:29:38,325 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 03:29:38,325 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 03:29:38,326 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 03:29:38,364 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 03:29:38,365 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 03:29:38,473 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 03:29:38,479 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 03:29:38,480 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-24 03:29:38,495 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:29:38 BoogieIcfgContainer [2022-02-24 03:29:38,496 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 03:29:38,497 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 03:29:38,497 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 03:29:38,513 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 03:29:38,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 03:29:38" (1/3) ... [2022-02-24 03:29:38,514 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a60c924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:29:38, skipping insertion in model container [2022-02-24 03:29:38,514 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 03:29:38" (2/3) ... [2022-02-24 03:29:38,515 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5a60c924 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 03:29:38, skipping insertion in model container [2022-02-24 03:29:38,515 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 03:29:38" (3/3) ... [2022-02-24 03:29:38,516 INFO L111 eAbstractionObserver]: Analyzing ICFG Mono6_1.c [2022-02-24 03:29:38,519 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 03:29:38,519 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 03:29:38,549 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 03:29:38,554 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 03:29:38,554 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 03:29:38,565 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 03:29:38,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 03:29:38,580 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:38,580 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:38,581 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:38,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:38,584 INFO L85 PathProgramCache]: Analyzing trace with hash -2135496849, now seen corresponding path program 1 times [2022-02-24 03:29:38,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:38,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1512747992] [2022-02-24 03:29:38,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:38,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:38,637 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:29:38,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:38,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:38,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:38,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:38,753 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:38,753 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1512747992] [2022-02-24 03:29:38,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1512747992] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:38,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:38,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 03:29:38,756 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323141800] [2022-02-24 03:29:38,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:38,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 03:29:38,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:38,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 03:29:38,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 03:29:38,782 INFO L87 Difference]: Start difference. First operand has 21 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 14 states have internal predecessors, (18), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:38,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:38,821 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-24 03:29:38,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 03:29:38,824 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-24 03:29:38,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:38,829 INFO L225 Difference]: With dead ends: 33 [2022-02-24 03:29:38,829 INFO L226 Difference]: Without dead ends: 14 [2022-02-24 03:29:38,832 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 03:29:38,834 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 13 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 24 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 03:29:38,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [14 Valid, 24 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:29:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-24 03:29:38,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-24 03:29:38,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.2222222222222223) internal successors, (11), 9 states have internal predecessors, (11), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:38,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-24 03:29:38,862 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-24 03:29:38,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:38,863 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-24 03:29:38,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 2 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-24 03:29:38,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-24 03:29:38,864 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:38,864 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:38,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 03:29:38,865 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:38,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:38,865 INFO L85 PathProgramCache]: Analyzing trace with hash -2145655580, now seen corresponding path program 1 times [2022-02-24 03:29:38,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:38,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510096256] [2022-02-24 03:29:38,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:38,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:38,870 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 03:29:38,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:38,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:39,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:39,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:39,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510096256] [2022-02-24 03:29:39,011 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510096256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:39,011 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:39,011 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 03:29:39,011 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999985078] [2022-02-24 03:29:39,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:39,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 03:29:39,012 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:39,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 03:29:39,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 03:29:39,013 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:39,057 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2022-02-24 03:29:39,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 03:29:39,058 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 11 [2022-02-24 03:29:39,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:39,059 INFO L225 Difference]: With dead ends: 25 [2022-02-24 03:29:39,059 INFO L226 Difference]: Without dead ends: 17 [2022-02-24 03:29:39,059 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 03:29:39,060 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 19 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 03:29:39,060 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 19 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:29:39,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-24 03:29:39,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 16. [2022-02-24 03:29:39,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2022-02-24 03:29:39,065 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 11 [2022-02-24 03:29:39,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:39,065 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2022-02-24 03:29:39,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.75) internal successors, (7), 3 states have internal predecessors, (7), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,066 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2022-02-24 03:29:39,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-24 03:29:39,066 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:39,066 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:39,066 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 03:29:39,066 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:39,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:39,067 INFO L85 PathProgramCache]: Analyzing trace with hash -79339060, now seen corresponding path program 1 times [2022-02-24 03:29:39,067 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:39,067 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1787482069] [2022-02-24 03:29:39,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:39,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:39,179 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:39,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:39,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:39,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:39,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1787482069] [2022-02-24 03:29:39,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1787482069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:39,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:39,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 03:29:39,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1971333056] [2022-02-24 03:29:39,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:39,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 03:29:39,304 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:39,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 03:29:39,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 03:29:39,305 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:39,348 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2022-02-24 03:29:39,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 03:29:39,348 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-24 03:29:39,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:39,349 INFO L225 Difference]: With dead ends: 28 [2022-02-24 03:29:39,349 INFO L226 Difference]: Without dead ends: 20 [2022-02-24 03:29:39,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 03:29:39,350 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:39,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [15 Valid, 24 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:29:39,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-24 03:29:39,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-02-24 03:29:39,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2022-02-24 03:29:39,354 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 14 [2022-02-24 03:29:39,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:39,354 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2022-02-24 03:29:39,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,355 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2022-02-24 03:29:39,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 03:29:39,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:39,355 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:39,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 03:29:39,355 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:39,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:39,356 INFO L85 PathProgramCache]: Analyzing trace with hash 2084821988, now seen corresponding path program 2 times [2022-02-24 03:29:39,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:39,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1689714020] [2022-02-24 03:29:39,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:39,357 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:39,431 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:39,473 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:39,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:39,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,549 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 03:29:39,596 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:39,596 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1689714020] [2022-02-24 03:29:39,596 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1689714020] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:39,596 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:39,596 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 03:29:39,596 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840634810] [2022-02-24 03:29:39,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:39,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 03:29:39,597 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:39,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 03:29:39,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-24 03:29:39,597 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:39,675 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-24 03:29:39,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 03:29:39,677 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 03:29:39,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:39,679 INFO L225 Difference]: With dead ends: 31 [2022-02-24 03:29:39,680 INFO L226 Difference]: Without dead ends: 23 [2022-02-24 03:29:39,681 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 5 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 03:29:39,693 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 55 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:39,693 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 55 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:29:39,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2022-02-24 03:29:39,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2022-02-24 03:29:39,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 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 03:29:39,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2022-02-24 03:29:39,698 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 17 [2022-02-24 03:29:39,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:39,699 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2022-02-24 03:29:39,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:39,699 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2022-02-24 03:29:39,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-24 03:29:39,699 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:39,700 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:39,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 03:29:39,700 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:39,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:39,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1442444596, now seen corresponding path program 3 times [2022-02-24 03:29:39,700 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:39,700 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [256874889] [2022-02-24 03:29:39,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:39,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:39,766 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:39,805 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:39,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:39,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:39,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:40,016 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:40,016 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [256874889] [2022-02-24 03:29:40,017 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [256874889] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:40,017 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:40,017 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 03:29:40,017 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430849063] [2022-02-24 03:29:40,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:40,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 03:29:40,018 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:40,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 03:29:40,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:29:40,019 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:40,124 INFO L93 Difference]: Finished difference Result 34 states and 38 transitions. [2022-02-24 03:29:40,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 03:29:40,124 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-24 03:29:40,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:40,125 INFO L225 Difference]: With dead ends: 34 [2022-02-24 03:29:40,126 INFO L226 Difference]: Without dead ends: 26 [2022-02-24 03:29:40,126 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 7 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-24 03:29:40,129 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 19 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:40,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [19 Valid, 34 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 03:29:40,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-24 03:29:40,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2022-02-24 03:29:40,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2022-02-24 03:29:40,142 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 20 [2022-02-24 03:29:40,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:40,144 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2022-02-24 03:29:40,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 6 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,147 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2022-02-24 03:29:40,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 03:29:40,148 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:40,149 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:40,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 03:29:40,149 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:40,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:40,149 INFO L85 PathProgramCache]: Analyzing trace with hash -1571384604, now seen corresponding path program 4 times [2022-02-24 03:29:40,149 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:40,149 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1055517583] [2022-02-24 03:29:40,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:40,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:40,202 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:40,244 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:40,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:40,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:40,326 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 03:29:40,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:40,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1055517583] [2022-02-24 03:29:40,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1055517583] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:40,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:40,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 03:29:40,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787215495] [2022-02-24 03:29:40,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:40,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 03:29:40,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:40,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 03:29:40,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-24 03:29:40,424 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:40,547 INFO L93 Difference]: Finished difference Result 37 states and 41 transitions. [2022-02-24 03:29:40,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 03:29:40,548 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 03:29:40,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:40,548 INFO L225 Difference]: With dead ends: 37 [2022-02-24 03:29:40,548 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 03:29:40,549 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 9 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:29:40,549 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 111 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 111 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:40,549 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 39 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 111 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:29:40,550 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 03:29:40,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2022-02-24 03:29:40,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2022-02-24 03:29:40,554 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 23 [2022-02-24 03:29:40,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:40,554 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2022-02-24 03:29:40,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.375) internal successors, (19), 7 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,554 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2022-02-24 03:29:40,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-24 03:29:40,554 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:40,555 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:40,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 03:29:40,555 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:40,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:40,555 INFO L85 PathProgramCache]: Analyzing trace with hash 1172566988, now seen corresponding path program 5 times [2022-02-24 03:29:40,555 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:40,555 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [821777511] [2022-02-24 03:29:40,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:40,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:40,590 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:40,625 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:40,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:40,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:40,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:40,674 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 03:29:40,801 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:40,801 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [821777511] [2022-02-24 03:29:40,801 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [821777511] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:40,801 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:40,801 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 03:29:40,802 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858164037] [2022-02-24 03:29:40,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:40,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 03:29:40,802 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:40,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 03:29:40,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2022-02-24 03:29:40,803 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:40,945 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2022-02-24 03:29:40,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 03:29:40,945 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-24 03:29:40,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:40,946 INFO L225 Difference]: With dead ends: 40 [2022-02-24 03:29:40,946 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 03:29:40,946 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 7 SyntacticMatches, 11 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=43, Invalid=197, Unknown=0, NotChecked=0, Total=240 [2022-02-24 03:29:40,946 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 23 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:40,947 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 44 Invalid, 160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:29:40,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 03:29:40,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2022-02-24 03:29:40,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2022-02-24 03:29:40,952 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 26 [2022-02-24 03:29:40,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:40,952 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2022-02-24 03:29:40,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 8 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:40,952 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2022-02-24 03:29:40,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 03:29:40,952 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:40,953 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:40,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 03:29:40,953 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:40,953 INFO L85 PathProgramCache]: Analyzing trace with hash 121899492, now seen corresponding path program 6 times [2022-02-24 03:29:40,953 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:40,953 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856289220] [2022-02-24 03:29:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:40,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:40,988 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:41,023 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:41,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:41,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:41,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:41,086 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 03:29:41,234 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:41,234 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856289220] [2022-02-24 03:29:41,234 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [856289220] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:41,235 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:41,235 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 03:29:41,235 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290543587] [2022-02-24 03:29:41,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:41,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 03:29:41,235 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:41,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 03:29:41,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=90, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:29:41,236 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:41,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:41,413 INFO L93 Difference]: Finished difference Result 43 states and 47 transitions. [2022-02-24 03:29:41,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 03:29:41,415 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 03:29:41,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:41,415 INFO L225 Difference]: With dead ends: 43 [2022-02-24 03:29:41,415 INFO L226 Difference]: Without dead ends: 35 [2022-02-24 03:29:41,416 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 7 SyntacticMatches, 13 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:29:41,416 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 197 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 49 SdHoareTripleChecker+Invalid, 207 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 197 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:41,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 49 Invalid, 207 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 197 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:29:41,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2022-02-24 03:29:41,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 34. [2022-02-24 03:29:41,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:41,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2022-02-24 03:29:41,435 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 29 [2022-02-24 03:29:41,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:41,435 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2022-02-24 03:29:41,435 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:41,436 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2022-02-24 03:29:41,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-24 03:29:41,436 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:41,436 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:41,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 03:29:41,436 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:41,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:41,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1408179404, now seen corresponding path program 7 times [2022-02-24 03:29:41,437 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:41,437 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1875224574] [2022-02-24 03:29:41,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:41,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:41,470 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:41,504 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:41,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:41,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:41,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:41,542 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 03:29:41,718 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:41,719 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1875224574] [2022-02-24 03:29:41,719 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1875224574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:41,719 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:41,719 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 03:29:41,719 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075800218] [2022-02-24 03:29:41,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:41,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 03:29:41,719 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 03:29:41,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-24 03:29:41,720 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:41,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:41,917 INFO L93 Difference]: Finished difference Result 46 states and 50 transitions. [2022-02-24 03:29:41,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 03:29:41,917 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-24 03:29:41,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:41,918 INFO L225 Difference]: With dead ends: 46 [2022-02-24 03:29:41,918 INFO L226 Difference]: Without dead ends: 38 [2022-02-24 03:29:41,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 9 SyntacticMatches, 15 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2022-02-24 03:29:41,919 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 27 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 249 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 260 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 249 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:41,919 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [27 Valid, 54 Invalid, 260 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 249 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:29:41,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2022-02-24 03:29:41,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2022-02-24 03:29:41,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:41,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2022-02-24 03:29:41,924 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 32 [2022-02-24 03:29:41,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:41,924 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2022-02-24 03:29:41,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.5454545454545454) internal successors, (28), 10 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:41,924 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2022-02-24 03:29:41,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 03:29:41,925 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:41,925 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:41,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 03:29:41,925 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:41,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1274822884, now seen corresponding path program 8 times [2022-02-24 03:29:41,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:41,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1470768538] [2022-02-24 03:29:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:41,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:41,958 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:41,991 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:41,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:42,034 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 03:29:42,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:42,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1470768538] [2022-02-24 03:29:42,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1470768538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:42,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:42,257 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 03:29:42,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903729399] [2022-02-24 03:29:42,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:42,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 03:29:42,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:42,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 03:29:42,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:29:42,259 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:42,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:42,502 INFO L93 Difference]: Finished difference Result 49 states and 53 transitions. [2022-02-24 03:29:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 03:29:42,502 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 03:29:42,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:42,503 INFO L225 Difference]: With dead ends: 49 [2022-02-24 03:29:42,503 INFO L226 Difference]: Without dead ends: 41 [2022-02-24 03:29:42,503 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 7 SyntacticMatches, 17 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:29:42,504 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 29 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 319 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:42,504 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 59 Invalid, 319 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:29:42,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2022-02-24 03:29:42,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2022-02-24 03:29:42,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:42,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2022-02-24 03:29:42,510 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 35 [2022-02-24 03:29:42,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:42,510 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2022-02-24 03:29:42,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:42,510 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2022-02-24 03:29:42,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-24 03:29:42,511 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:42,511 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:42,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 03:29:42,511 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:42,511 INFO L85 PathProgramCache]: Analyzing trace with hash 1295484364, now seen corresponding path program 9 times [2022-02-24 03:29:42,511 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:42,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402198449] [2022-02-24 03:29:42,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:42,512 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:42,548 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:42,577 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:42,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:42,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:42,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:42,637 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 03:29:42,937 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:42,937 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402198449] [2022-02-24 03:29:42,937 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402198449] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:42,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:42,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 03:29:42,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907984704] [2022-02-24 03:29:42,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:42,938 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 03:29:42,938 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:42,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 03:29:42,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-24 03:29:42,938 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:43,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:43,225 INFO L93 Difference]: Finished difference Result 52 states and 56 transitions. [2022-02-24 03:29:43,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 03:29:43,226 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-24 03:29:43,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:43,227 INFO L225 Difference]: With dead ends: 52 [2022-02-24 03:29:43,227 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 03:29:43,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 9 SyntacticMatches, 19 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=63, Invalid=443, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:29:43,227 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 31 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 371 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 371 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:43,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [31 Valid, 64 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 371 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 03:29:43,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 03:29:43,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2022-02-24 03:29:43,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2022-02-24 03:29:43,233 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 38 [2022-02-24 03:29:43,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:43,233 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2022-02-24 03:29:43,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6153846153846154) internal successors, (34), 12 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:43,234 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2022-02-24 03:29:43,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-24 03:29:43,234 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:43,234 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:43,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 03:29:43,234 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:43,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:43,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1653655580, now seen corresponding path program 10 times [2022-02-24 03:29:43,235 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:43,235 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [506890661] [2022-02-24 03:29:43,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:43,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:43,269 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:43,300 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:43,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:43,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:43,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:43,357 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 03:29:43,677 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:43,677 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [506890661] [2022-02-24 03:29:43,677 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [506890661] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:43,677 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:43,678 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 03:29:43,678 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27132714] [2022-02-24 03:29:43,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:43,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 03:29:43,678 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:43,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 03:29:43,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-24 03:29:43,679 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:44,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:44,005 INFO L93 Difference]: Finished difference Result 55 states and 59 transitions. [2022-02-24 03:29:44,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 03:29:44,005 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-24 03:29:44,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:44,006 INFO L225 Difference]: With dead ends: 55 [2022-02-24 03:29:44,006 INFO L226 Difference]: Without dead ends: 47 [2022-02-24 03:29:44,006 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 9 SyntacticMatches, 21 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2022-02-24 03:29:44,007 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 33 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 441 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 455 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 441 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:44,007 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 69 Invalid, 455 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 441 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:29:44,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-24 03:29:44,012 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-02-24 03:29:44,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:44,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-02-24 03:29:44,013 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2022-02-24 03:29:44,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:44,013 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-02-24 03:29:44,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.642857142857143) internal successors, (37), 13 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:44,013 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-02-24 03:29:44,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-24 03:29:44,014 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:44,014 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:44,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 03:29:44,014 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:44,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:44,014 INFO L85 PathProgramCache]: Analyzing trace with hash -1630720308, now seen corresponding path program 11 times [2022-02-24 03:29:44,014 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:44,014 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089669105] [2022-02-24 03:29:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:44,056 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:44,085 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:44,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:44,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:44,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:44,132 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 03:29:44,542 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:44,542 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089669105] [2022-02-24 03:29:44,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089669105] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:44,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:44,543 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 03:29:44,543 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185961779] [2022-02-24 03:29:44,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:44,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 03:29:44,543 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:44,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 03:29:44,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-24 03:29:44,544 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 03:29:44,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:44,918 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-02-24 03:29:44,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 03:29:44,918 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 03:29:44,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:44,919 INFO L225 Difference]: With dead ends: 58 [2022-02-24 03:29:44,919 INFO L226 Difference]: Without dead ends: 50 [2022-02-24 03:29:44,919 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 9 SyntacticMatches, 23 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=75, Invalid=627, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:29:44,920 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 35 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 517 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 517 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:44,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 74 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 517 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:29:44,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-24 03:29:44,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-02-24 03:29:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 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 03:29:44,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-02-24 03:29:44,926 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-02-24 03:29:44,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:44,926 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-02-24 03:29:44,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 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 03:29:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-02-24 03:29:44,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 03:29:44,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:44,927 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:44,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 03:29:44,927 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:44,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:44,927 INFO L85 PathProgramCache]: Analyzing trace with hash -1265832220, now seen corresponding path program 12 times [2022-02-24 03:29:44,927 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:44,927 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1245005302] [2022-02-24 03:29:44,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:44,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:44,971 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:45,006 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:45,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:45,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:45,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:45,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:45,550 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:45,551 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1245005302] [2022-02-24 03:29:45,551 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1245005302] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:45,551 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:45,551 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 03:29:45,551 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957871206] [2022-02-24 03:29:45,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:45,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 03:29:45,551 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:45,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 03:29:45,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=240, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:29:45,552 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 03:29:46,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:46,042 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-02-24 03:29:46,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 03:29:46,042 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 03:29:46,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:46,043 INFO L225 Difference]: With dead ends: 61 [2022-02-24 03:29:46,043 INFO L226 Difference]: Without dead ends: 53 [2022-02-24 03:29:46,043 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 7 SyntacticMatches, 25 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=85, Invalid=785, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:29:46,044 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 37 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 615 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:46,044 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [37 Valid, 79 Invalid, 615 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 03:29:46,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-24 03:29:46,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-24 03:29:46,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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 03:29:46,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-02-24 03:29:46,050 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-02-24 03:29:46,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:46,050 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-02-24 03:29:46,050 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.6875) internal successors, (43), 15 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 03:29:46,050 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-02-24 03:29:46,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-24 03:29:46,051 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:46,051 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:46,051 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 03:29:46,051 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:46,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:46,051 INFO L85 PathProgramCache]: Analyzing trace with hash -1447028788, now seen corresponding path program 13 times [2022-02-24 03:29:46,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:46,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [363423699] [2022-02-24 03:29:46,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:46,052 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:46,087 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:46,120 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:46,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:46,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:46,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:46,163 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:46,762 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:46,762 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [363423699] [2022-02-24 03:29:46,762 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [363423699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:46,762 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:46,762 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 03:29:46,763 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398062538] [2022-02-24 03:29:46,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:46,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 03:29:46,763 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 03:29:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-24 03:29:46,764 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 03:29:47,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:47,302 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-02-24 03:29:47,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 03:29:47,303 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 03:29:47,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:47,303 INFO L225 Difference]: With dead ends: 64 [2022-02-24 03:29:47,303 INFO L226 Difference]: Without dead ends: 56 [2022-02-24 03:29:47,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 9 SyntacticMatches, 27 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=87, Invalid=843, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:29:47,304 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 39 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 704 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:47,304 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [39 Valid, 84 Invalid, 704 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:29:47,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-24 03:29:47,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-24 03:29:47,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 50 states have (on average 1.04) internal successors, (52), 50 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 03:29:47,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-02-24 03:29:47,310 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-02-24 03:29:47,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:47,310 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-02-24 03:29:47,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 03:29:47,311 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-02-24 03:29:47,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-24 03:29:47,311 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:47,311 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:47,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 03:29:47,311 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:47,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:47,312 INFO L85 PathProgramCache]: Analyzing trace with hash -700095004, now seen corresponding path program 14 times [2022-02-24 03:29:47,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:47,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1018921944] [2022-02-24 03:29:47,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:47,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:47,345 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:47,374 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:47,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:47,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:47,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:47,417 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 03:29:48,107 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:48,107 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1018921944] [2022-02-24 03:29:48,107 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1018921944] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:48,107 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:48,107 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 03:29:48,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055358909] [2022-02-24 03:29:48,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:48,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 03:29:48,108 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:48,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 03:29:48,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-24 03:29:48,108 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 03:29:48,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:48,695 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-02-24 03:29:48,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-24 03:29:48,699 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 03:29:48,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:48,700 INFO L225 Difference]: With dead ends: 67 [2022-02-24 03:29:48,700 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 03:29:48,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 9 SyntacticMatches, 29 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=93, Invalid=963, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 03:29:48,701 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 781 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 799 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:48,701 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 89 Invalid, 799 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 781 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:29:48,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 03:29:48,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-02-24 03:29:48,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:48,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-02-24 03:29:48,707 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-02-24 03:29:48,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:48,707 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-02-24 03:29:48,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 03:29:48,707 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-02-24 03:29:48,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-24 03:29:48,708 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:48,708 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:48,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 03:29:48,708 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:48,708 INFO L85 PathProgramCache]: Analyzing trace with hash -1021296436, now seen corresponding path program 15 times [2022-02-24 03:29:48,708 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:48,708 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [10640672] [2022-02-24 03:29:48,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:48,740 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:48,768 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:48,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:48,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:48,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:48,815 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 03:29:49,678 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:49,678 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [10640672] [2022-02-24 03:29:49,679 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [10640672] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:49,679 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:49,679 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 03:29:49,679 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529272572] [2022-02-24 03:29:49,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:49,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 03:29:49,679 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:49,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 03:29:49,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=342, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:29:49,680 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 03:29:50,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:50,350 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-02-24 03:29:50,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 03:29:50,350 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 03:29:50,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:50,350 INFO L225 Difference]: With dead ends: 70 [2022-02-24 03:29:50,351 INFO L226 Difference]: Without dead ends: 62 [2022-02-24 03:29:50,351 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 7 SyntacticMatches, 31 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:29:50,351 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 43 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 881 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 94 SdHoareTripleChecker+Invalid, 900 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:50,352 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 94 Invalid, 900 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 881 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:29:50,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-24 03:29:50,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-02-24 03:29:50,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:50,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-02-24 03:29:50,358 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-02-24 03:29:50,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:50,358 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-02-24 03:29:50,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 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 03:29:50,358 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-02-24 03:29:50,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-24 03:29:50,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:50,359 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:50,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 03:29:50,359 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:50,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:50,359 INFO L85 PathProgramCache]: Analyzing trace with hash -746021660, now seen corresponding path program 16 times [2022-02-24 03:29:50,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:50,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699529956] [2022-02-24 03:29:50,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:50,360 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:50,391 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:50,417 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:50,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:50,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:50,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:50,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:51,407 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:51,407 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699529956] [2022-02-24 03:29:51,408 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699529956] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:51,408 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:51,408 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 03:29:51,408 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176344478] [2022-02-24 03:29:51,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:51,408 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 03:29:51,408 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:51,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 03:29:51,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-24 03:29:51,409 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 03:29:52,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:52,137 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-02-24 03:29:52,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-24 03:29:52,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 03:29:52,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:52,138 INFO L225 Difference]: With dead ends: 73 [2022-02-24 03:29:52,138 INFO L226 Difference]: Without dead ends: 65 [2022-02-24 03:29:52,139 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 9 SyntacticMatches, 33 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 03:29:52,139 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 45 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 987 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 987 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:52,139 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 99 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 987 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 03:29:52,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-24 03:29:52,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-02-24 03:29:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:52,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-02-24 03:29:52,146 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-02-24 03:29:52,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:52,146 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-02-24 03:29:52,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.75) internal successors, (55), 19 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 03:29:52,146 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-02-24 03:29:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-24 03:29:52,149 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:52,149 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:52,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 03:29:52,149 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:52,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:52,149 INFO L85 PathProgramCache]: Analyzing trace with hash 872262092, now seen corresponding path program 17 times [2022-02-24 03:29:52,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:52,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1675779069] [2022-02-24 03:29:52,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:52,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:52,182 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:52,215 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:52,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:52,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:52,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:29:53,481 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:53,482 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1675779069] [2022-02-24 03:29:53,482 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1675779069] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:53,482 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:53,482 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 03:29:53,482 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356062498] [2022-02-24 03:29:53,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:53,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 03:29:53,482 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:53,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 03:29:53,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=420, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:29:53,483 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 03:29:54,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:54,373 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-02-24 03:29:54,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 03:29:54,374 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 03:29:54,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:54,374 INFO L225 Difference]: With dead ends: 76 [2022-02-24 03:29:54,374 INFO L226 Difference]: Without dead ends: 68 [2022-02-24 03:29:54,375 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 7 SyntacticMatches, 35 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=115, Invalid=1445, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 03:29:54,375 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 47 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 1099 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1120 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 1099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:54,375 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 104 Invalid, 1120 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 1099 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:29:54,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-24 03:29:54,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-02-24 03:29:54,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 62 states have (on average 1.032258064516129) internal successors, (64), 62 states have internal predecessors, (64), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:54,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-02-24 03:29:54,382 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-02-24 03:29:54,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:54,382 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-02-24 03:29:54,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.761904761904762) internal successors, (58), 20 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 03:29:54,382 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-02-24 03:29:54,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-24 03:29:54,382 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:54,383 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:54,383 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 03:29:54,383 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:54,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:54,383 INFO L85 PathProgramCache]: Analyzing trace with hash 155620324, now seen corresponding path program 18 times [2022-02-24 03:29:54,383 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:54,383 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [511499418] [2022-02-24 03:29:54,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:54,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:54,420 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:54,450 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:54,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:54,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:54,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:54,494 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 03:29:55,831 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:55,831 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [511499418] [2022-02-24 03:29:55,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [511499418] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:55,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:55,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 03:29:55,831 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111980259] [2022-02-24 03:29:55,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:55,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 03:29:55,832 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:55,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 03:29:55,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-24 03:29:55,832 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 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 03:29:56,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:56,782 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-02-24 03:29:56,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 03:29:56,783 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 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 03:29:56,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:56,783 INFO L225 Difference]: With dead ends: 79 [2022-02-24 03:29:56,783 INFO L226 Difference]: Without dead ends: 71 [2022-02-24 03:29:56,784 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 9 SyntacticMatches, 37 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=117, Invalid=1523, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 03:29:56,784 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 49 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 1217 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:56,785 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 109 Invalid, 1239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1217 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 03:29:56,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-24 03:29:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-02-24 03:29:56,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:29:56,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-02-24 03:29:56,791 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2022-02-24 03:29:56,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:56,791 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-02-24 03:29:56,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 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 03:29:56,791 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-02-24 03:29:56,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 03:29:56,792 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:56,792 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:56,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 03:29:56,792 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:56,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:56,792 INFO L85 PathProgramCache]: Analyzing trace with hash 963138252, now seen corresponding path program 19 times [2022-02-24 03:29:56,792 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:56,792 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [330969630] [2022-02-24 03:29:56,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:56,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:56,821 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:56,848 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:56,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:56,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:56,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:56,904 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 03:29:58,556 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:29:58,556 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [330969630] [2022-02-24 03:29:58,557 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [330969630] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:29:58,557 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:29:58,557 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 03:29:58,557 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1496959656] [2022-02-24 03:29:58,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:29:58,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 03:29:58,557 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:29:58,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 03:29:58,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-24 03:29:58,558 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 03:29:59,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:29:59,825 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-02-24 03:29:59,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 03:29:59,825 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 03:29:59,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:29:59,826 INFO L225 Difference]: With dead ends: 82 [2022-02-24 03:29:59,826 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 03:29:59,826 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 9 SyntacticMatches, 39 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=123, Invalid=1683, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 03:29:59,827 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 51 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 1341 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 114 SdHoareTripleChecker+Invalid, 1364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 1341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:29:59,827 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 114 Invalid, 1364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 1341 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:29:59,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 03:29:59,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-02-24 03:29:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 68 states have (on average 1.0294117647058822) internal successors, (70), 68 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 03:29:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-02-24 03:29:59,836 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-02-24 03:29:59,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:29:59,836 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-02-24 03:29:59,837 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.782608695652174) internal successors, (64), 22 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 03:29:59,837 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-02-24 03:29:59,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-24 03:29:59,837 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:29:59,837 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:29:59,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 03:29:59,838 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:29:59,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:29:59,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1617906404, now seen corresponding path program 20 times [2022-02-24 03:29:59,838 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:29:59,838 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1293262247] [2022-02-24 03:29:59,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:29:59,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:29:59,874 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:59,904 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:29:59,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:29:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:29:59,969 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 03:30:02,030 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:02,030 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1293262247] [2022-02-24 03:30:02,030 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1293262247] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:02,030 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:02,031 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 03:30:02,031 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706583526] [2022-02-24 03:30:02,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:02,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 03:30:02,031 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:02,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 03:30:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-24 03:30:02,032 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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 03:30:03,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:03,468 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-02-24 03:30:03,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 03:30:03,468 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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 03:30:03,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:03,469 INFO L225 Difference]: With dead ends: 85 [2022-02-24 03:30:03,469 INFO L226 Difference]: Without dead ends: 77 [2022-02-24 03:30:03,469 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 9 SyntacticMatches, 41 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2022-02-24 03:30:03,470 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 1495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:03,470 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 119 Invalid, 1495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:30:03,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-24 03:30:03,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-02-24 03:30:03,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 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 03:30:03,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-02-24 03:30:03,479 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-02-24 03:30:03,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:03,480 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-02-24 03:30:03,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 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 03:30:03,480 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-02-24 03:30:03,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-24 03:30:03,480 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:03,480 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:03,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 03:30:03,481 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:03,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:03,481 INFO L85 PathProgramCache]: Analyzing trace with hash 74464204, now seen corresponding path program 21 times [2022-02-24 03:30:03,481 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:03,481 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [683185906] [2022-02-24 03:30:03,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:03,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:03,508 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:03,535 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:03,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:03,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:03,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:03,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:30:06,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:06,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [683185906] [2022-02-24 03:30:06,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [683185906] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:06,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:06,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 03:30:06,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592258666] [2022-02-24 03:30:06,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:06,634 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 03:30:06,634 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:06,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 03:30:06,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=600, Unknown=0, NotChecked=0, Total=650 [2022-02-24 03:30:06,635 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 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 03:30:08,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:08,206 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-02-24 03:30:08,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 03:30:08,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 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 03:30:08,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:08,207 INFO L225 Difference]: With dead ends: 88 [2022-02-24 03:30:08,207 INFO L226 Difference]: Without dead ends: 80 [2022-02-24 03:30:08,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 7 SyntacticMatches, 43 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=139, Invalid=2117, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 03:30:08,208 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 55 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 1607 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1607 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:08,208 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 124 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1607 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 03:30:08,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-24 03:30:08,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-02-24 03:30:08,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 74 states have (on average 1.027027027027027) internal successors, (76), 74 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 03:30:08,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-02-24 03:30:08,216 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-02-24 03:30:08,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:08,216 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-02-24 03:30:08,216 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 24 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 03:30:08,216 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-02-24 03:30:08,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-24 03:30:08,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:08,216 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:08,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 03:30:08,217 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:08,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:08,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1307754980, now seen corresponding path program 22 times [2022-02-24 03:30:08,217 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:08,217 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [739820942] [2022-02-24 03:30:08,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:08,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:08,254 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:08,279 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:08,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:08,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:08,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:08,391 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:30:11,429 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:11,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [739820942] [2022-02-24 03:30:11,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [739820942] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:11,430 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:11,430 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 03:30:11,430 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100061890] [2022-02-24 03:30:11,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:11,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 03:30:11,430 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:11,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 03:30:11,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=650, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:30:11,431 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 03:30:13,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:13,341 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-02-24 03:30:13,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-24 03:30:13,342 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 03:30:13,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:13,342 INFO L225 Difference]: With dead ends: 91 [2022-02-24 03:30:13,342 INFO L226 Difference]: Without dead ends: 83 [2022-02-24 03:30:13,343 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 7 SyntacticMatches, 45 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=145, Invalid=2305, Unknown=0, NotChecked=0, Total=2450 [2022-02-24 03:30:13,343 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 1749 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1749 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:13,344 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [57 Valid, 129 Invalid, 1775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1749 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:30:13,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-24 03:30:13,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-02-24 03:30:13,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 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 03:30:13,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-02-24 03:30:13,352 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-02-24 03:30:13,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:13,352 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-02-24 03:30:13,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.8076923076923075) internal successors, (73), 25 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 03:30:13,352 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-02-24 03:30:13,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-24 03:30:13,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:13,353 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:13,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 03:30:13,353 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:13,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:13,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1171954484, now seen corresponding path program 23 times [2022-02-24 03:30:13,353 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:13,353 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [795536412] [2022-02-24 03:30:13,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:13,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:13,386 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:13,411 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:13,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:13,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:13,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:13,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:30:17,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:17,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [795536412] [2022-02-24 03:30:17,310 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [795536412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:17,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:17,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-24 03:30:17,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432521345] [2022-02-24 03:30:17,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:17,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-24 03:30:17,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:17,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-24 03:30:17,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-02-24 03:30:17,312 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:19,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:19,322 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-02-24 03:30:19,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 03:30:19,322 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-24 03:30:19,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:19,323 INFO L225 Difference]: With dead ends: 94 [2022-02-24 03:30:19,323 INFO L226 Difference]: Without dead ends: 86 [2022-02-24 03:30:19,324 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 9 SyntacticMatches, 47 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2022-02-24 03:30:19,324 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 59 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1897 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 1924 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:19,324 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 134 Invalid, 1924 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1897 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:30:19,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-24 03:30:19,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-24 03:30:19,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 80 states have (on average 1.025) internal successors, (82), 80 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 03:30:19,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-02-24 03:30:19,332 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-02-24 03:30:19,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:19,333 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-02-24 03:30:19,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:19,333 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-02-24 03:30:19,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-24 03:30:19,333 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:19,333 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:19,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 03:30:19,334 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:19,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:19,334 INFO L85 PathProgramCache]: Analyzing trace with hash -759105308, now seen corresponding path program 24 times [2022-02-24 03:30:19,334 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:19,334 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [264923459] [2022-02-24 03:30:19,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:19,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:19,363 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:19,392 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:19,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:19,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:19,492 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 03:30:24,559 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:24,560 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [264923459] [2022-02-24 03:30:24,560 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [264923459] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:24,560 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:24,560 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 03:30:24,560 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614061449] [2022-02-24 03:30:24,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:24,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 03:30:24,560 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:24,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 03:30:24,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=756, Unknown=0, NotChecked=0, Total=812 [2022-02-24 03:30:24,561 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:27,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:27,226 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-02-24 03:30:27,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 03:30:27,226 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-24 03:30:27,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:27,227 INFO L225 Difference]: With dead ends: 97 [2022-02-24 03:30:27,227 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 03:30:27,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 7 SyntacticMatches, 49 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=157, Invalid=2705, Unknown=0, NotChecked=0, Total=2862 [2022-02-24 03:30:27,228 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 61 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 2051 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 139 SdHoareTripleChecker+Invalid, 2079 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 2051 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:27,228 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 139 Invalid, 2079 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 2051 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 03:30:27,228 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 03:30:27,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-02-24 03:30:27,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 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 03:30:27,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-02-24 03:30:27,237 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2022-02-24 03:30:27,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:27,237 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-02-24 03:30:27,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.8214285714285716) internal successors, (79), 27 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:27,237 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-02-24 03:30:27,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-24 03:30:27,238 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:27,239 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:27,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 03:30:27,239 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:27,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:27,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1939328460, now seen corresponding path program 25 times [2022-02-24 03:30:27,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:27,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144147417] [2022-02-24 03:30:27,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:27,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:27,266 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:27,291 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:27,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:27,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:27,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:27,363 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 03:30:34,082 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:34,082 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144147417] [2022-02-24 03:30:34,082 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144147417] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:34,082 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:34,082 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 03:30:34,082 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522307733] [2022-02-24 03:30:34,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:34,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 03:30:34,082 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:34,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 03:30:34,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=812, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:30:34,083 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:37,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:37,028 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-02-24 03:30:37,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-24 03:30:37,029 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-24 03:30:37,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:37,030 INFO L225 Difference]: With dead ends: 100 [2022-02-24 03:30:37,030 INFO L226 Difference]: Without dead ends: 92 [2022-02-24 03:30:37,030 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 7 SyntacticMatches, 51 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 401 ImplicationChecksByTransitivity, 8.9s TimeCoverageRelationStatistics Valid=163, Invalid=2917, Unknown=0, NotChecked=0, Total=3080 [2022-02-24 03:30:37,031 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 63 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 2211 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2240 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2211 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:37,031 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 144 Invalid, 2240 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2211 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:30:37,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-24 03:30:37,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-02-24 03:30:37,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 86 states have (on average 1.0232558139534884) internal successors, (88), 86 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 03:30:37,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-02-24 03:30:37,040 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-02-24 03:30:37,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:37,040 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-02-24 03:30:37,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.8275862068965516) internal successors, (82), 28 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:37,040 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-02-24 03:30:37,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 03:30:37,041 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:37,041 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:37,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 03:30:37,041 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:37,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:37,041 INFO L85 PathProgramCache]: Analyzing trace with hash 2076831716, now seen corresponding path program 26 times [2022-02-24 03:30:37,041 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:37,041 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1986293775] [2022-02-24 03:30:37,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:37,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:37,069 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:37,105 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:37,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:37,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:37,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:30:47,416 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:30:47,417 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1986293775] [2022-02-24 03:30:47,417 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1986293775] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:30:47,417 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:30:47,417 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 03:30:47,417 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208785353] [2022-02-24 03:30:47,417 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:30:47,417 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 03:30:47,417 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:30:47,417 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 03:30:47,418 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-02-24 03:30:47,418 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:51,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:30:51,143 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-02-24 03:30:51,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 03:30:51,143 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-24 03:30:51,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:30:51,144 INFO L225 Difference]: With dead ends: 103 [2022-02-24 03:30:51,144 INFO L226 Difference]: Without dead ends: 95 [2022-02-24 03:30:51,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 9 SyntacticMatches, 53 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 13.1s TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2022-02-24 03:30:51,145 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 65 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 2377 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2407 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 03:30:51,145 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 149 Invalid, 2407 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2377 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 03:30:51,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-24 03:30:51,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-02-24 03:30:51,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 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 03:30:51,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-02-24 03:30:51,155 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2022-02-24 03:30:51,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:30:51,155 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-02-24 03:30:51,155 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.8333333333333335) internal successors, (85), 29 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:30:51,155 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-02-24 03:30:51,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-24 03:30:51,156 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:30:51,156 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:30:51,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 03:30:51,156 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:30:51,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:30:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1037530828, now seen corresponding path program 27 times [2022-02-24 03:30:51,156 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:30:51,157 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [854787143] [2022-02-24 03:30:51,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:30:51,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:30:51,187 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:51,214 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:30:51,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:51,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:30:51,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:30:51,292 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 03:31:03,760 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:31:03,761 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [854787143] [2022-02-24 03:31:03,761 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [854787143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:31:03,761 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:31:03,761 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-24 03:31:03,761 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361775327] [2022-02-24 03:31:03,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:31:03,761 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-24 03:31:03,761 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:31:03,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-24 03:31:03,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-02-24 03:31:03,762 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:31:08,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:31:08,849 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-02-24 03:31:08,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-24 03:31:08,850 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-24 03:31:08,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:31:08,850 INFO L225 Difference]: With dead ends: 106 [2022-02-24 03:31:08,850 INFO L226 Difference]: Without dead ends: 98 [2022-02-24 03:31:08,851 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 9 SyntacticMatches, 55 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 378 ImplicationChecksByTransitivity, 16.6s TimeCoverageRelationStatistics Valid=171, Invalid=3251, Unknown=0, NotChecked=0, Total=3422 [2022-02-24 03:31:08,852 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 67 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 2549 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:31:08,852 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 154 Invalid, 2580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2549 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:31:08,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-24 03:31:08,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-02-24 03:31:08,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 92 states have (on average 1.0217391304347827) internal successors, (94), 92 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 03:31:08,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-02-24 03:31:08,862 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-02-24 03:31:08,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:31:08,862 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-02-24 03:31:08,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.838709677419355) internal successors, (88), 30 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:31:08,862 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-02-24 03:31:08,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-24 03:31:08,862 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:31:08,863 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:31:08,863 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 03:31:08,863 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:31:08,863 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:31:08,863 INFO L85 PathProgramCache]: Analyzing trace with hash 1644013284, now seen corresponding path program 28 times [2022-02-24 03:31:08,863 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:31:08,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1632175831] [2022-02-24 03:31:08,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:31:08,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:31:08,890 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:31:08,916 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:31:08,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:31:09,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:31:09,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:31:09,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:31:25,873 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:31:25,874 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1632175831] [2022-02-24 03:31:25,874 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1632175831] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:31:25,874 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:31:25,874 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 03:31:25,874 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733200940] [2022-02-24 03:31:25,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:31:25,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 03:31:25,874 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:31:25,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 03:31:25,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2022-02-24 03:31:25,875 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:31:33,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:31:33,282 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-02-24 03:31:33,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 03:31:33,282 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-02-24 03:31:33,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:31:33,283 INFO L225 Difference]: With dead ends: 109 [2022-02-24 03:31:33,283 INFO L226 Difference]: Without dead ends: 101 [2022-02-24 03:31:33,283 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 9 SyntacticMatches, 57 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 23.3s TimeCoverageRelationStatistics Valid=177, Invalid=3483, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 03:31:33,284 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 69 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 2727 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 159 SdHoareTripleChecker+Invalid, 2759 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2727 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 03:31:33,284 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 159 Invalid, 2759 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2727 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 03:31:33,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-24 03:31:33,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-02-24 03:31:33,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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 03:31:33,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-02-24 03:31:33,295 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-02-24 03:31:33,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:31:33,295 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-02-24 03:31:33,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.84375) internal successors, (91), 31 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:31:33,295 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-02-24 03:31:33,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-24 03:31:33,296 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:31:33,296 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:31:33,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 03:31:33,296 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:31:33,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:31:33,296 INFO L85 PathProgramCache]: Analyzing trace with hash 435445708, now seen corresponding path program 29 times [2022-02-24 03:31:33,296 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:31:33,296 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1833647572] [2022-02-24 03:31:33,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:31:33,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:31:33,324 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:31:33,350 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:31:33,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:31:33,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:31:33,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:31:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:31:59,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:31:59,595 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1833647572] [2022-02-24 03:31:59,595 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1833647572] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:31:59,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:31:59,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-24 03:31:59,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824372657] [2022-02-24 03:31:59,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:31:59,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-24 03:31:59,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:31:59,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-24 03:31:59,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=1056, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 03:31:59,596 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:32:11,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:32:11,439 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-02-24 03:32:11,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 03:32:11,443 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 98 [2022-02-24 03:32:11,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:32:11,444 INFO L225 Difference]: With dead ends: 112 [2022-02-24 03:32:11,444 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 03:32:11,445 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 7 SyntacticMatches, 59 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 36.9s TimeCoverageRelationStatistics Valid=187, Invalid=3845, Unknown=0, NotChecked=0, Total=4032 [2022-02-24 03:32:11,445 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 71 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 2911 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 164 SdHoareTripleChecker+Invalid, 2944 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2911 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 03:32:11,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 164 Invalid, 2944 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2911 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 03:32:11,446 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 03:32:11,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-02-24 03:32:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 98 states have (on average 1.0204081632653061) internal successors, (100), 98 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 03:32:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-02-24 03:32:11,457 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-02-24 03:32:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:32:11,458 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-02-24 03:32:11,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:32:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-02-24 03:32:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 03:32:11,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:32:11,458 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:32:11,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 03:32:11,458 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:32:11,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:32:11,459 INFO L85 PathProgramCache]: Analyzing trace with hash 709631460, now seen corresponding path program 30 times [2022-02-24 03:32:11,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:32:11,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907993144] [2022-02-24 03:32:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:32:11,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:32:11,486 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:32:11,514 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:32:11,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:32:11,751 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:32:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:32:11,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:32:49,371 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:32:49,371 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907993144] [2022-02-24 03:32:49,371 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907993144] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:32:49,371 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:32:49,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-24 03:32:49,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531650644] [2022-02-24 03:32:49,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:32:49,372 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-24 03:32:49,372 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:32:49,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-24 03:32:49,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=1122, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:32:49,373 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:33:02,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:33:02,827 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-02-24 03:33:02,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 03:33:02,828 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-24 03:33:02,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:33:02,828 INFO L225 Difference]: With dead ends: 115 [2022-02-24 03:33:02,829 INFO L226 Difference]: Without dead ends: 107 [2022-02-24 03:33:02,830 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 7 SyntacticMatches, 61 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 50.1s TimeCoverageRelationStatistics Valid=193, Invalid=4097, Unknown=0, NotChecked=0, Total=4290 [2022-02-24 03:33:02,830 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 73 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 3101 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 3101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 03:33:02,830 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 169 Invalid, 3135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 3101 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 03:33:02,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-24 03:33:02,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-02-24 03:33:02,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:33:02,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-02-24 03:33:02,842 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2022-02-24 03:33:02,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:33:02,842 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-02-24 03:33:02,842 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.8529411764705883) internal successors, (97), 33 states have internal predecessors, (97), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:33:02,842 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-02-24 03:33:02,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-24 03:33:02,843 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:33:02,843 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:33:02,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 03:33:02,843 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:33:02,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:33:02,843 INFO L85 PathProgramCache]: Analyzing trace with hash -50427700, now seen corresponding path program 31 times [2022-02-24 03:33:02,843 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:33:02,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322372755] [2022-02-24 03:33:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:33:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:33:02,871 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:33:02,897 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:33:02,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:33:03,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:33:03,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:33:03,034 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 03:33:48,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:33:48,620 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322372755] [2022-02-24 03:33:48,620 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [322372755] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:33:48,620 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:33:48,620 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-24 03:33:48,620 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653447642] [2022-02-24 03:33:48,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:33:48,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-24 03:33:48,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:33:48,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-24 03:33:48,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 03:33:48,621 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:34:07,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:34:07,607 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-02-24 03:34:07,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-24 03:34:07,608 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 104 [2022-02-24 03:34:07,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:34:07,608 INFO L225 Difference]: With dead ends: 118 [2022-02-24 03:34:07,608 INFO L226 Difference]: Without dead ends: 110 [2022-02-24 03:34:07,609 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 9 SyntacticMatches, 63 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 496 ImplicationChecksByTransitivity, 63.3s TimeCoverageRelationStatistics Valid=195, Invalid=4227, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 03:34:07,609 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 75 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 3297 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 174 SdHoareTripleChecker+Invalid, 3332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3297 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:34:07,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 174 Invalid, 3332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3297 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:34:07,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-24 03:34:07,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-02-24 03:34:07,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 104 states have (on average 1.0192307692307692) internal successors, (106), 104 states have internal predecessors, (106), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:34:07,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-02-24 03:34:07,622 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-02-24 03:34:07,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:34:07,622 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-02-24 03:34:07,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.857142857142857) internal successors, (100), 34 states have internal predecessors, (100), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:34:07,622 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-02-24 03:34:07,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-24 03:34:07,623 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:34:07,623 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:34:07,623 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 03:34:07,623 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:34:07,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:34:07,623 INFO L85 PathProgramCache]: Analyzing trace with hash 94721252, now seen corresponding path program 32 times [2022-02-24 03:34:07,623 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:34:07,623 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930732520] [2022-02-24 03:34:07,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:34:07,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:34:07,651 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:34:07,677 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:34:07,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:34:07,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:34:07,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:34:07,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 03:35:26,408 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:35:26,409 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930732520] [2022-02-24 03:35:26,409 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930732520] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:35:26,409 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:35:26,409 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-24 03:35:26,409 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965077925] [2022-02-24 03:35:26,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:35:26,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-24 03:35:26,409 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:35:26,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-24 03:35:26,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 03:35:26,410 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:35:55,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:35:55,597 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-02-24 03:35:55,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 03:35:55,598 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-02-24 03:35:55,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:35:55,598 INFO L225 Difference]: With dead ends: 121 [2022-02-24 03:35:55,598 INFO L226 Difference]: Without dead ends: 113 [2022-02-24 03:35:55,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 9 SyntacticMatches, 65 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 528 ImplicationChecksByTransitivity, 106.4s TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2022-02-24 03:35:55,600 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 77 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 3499 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3535 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3499 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:35:55,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 179 Invalid, 3535 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3499 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:35:55,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-24 03:35:55,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-02-24 03:35:55,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:35:55,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-02-24 03:35:55,617 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-02-24 03:35:55,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:35:55,617 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-02-24 03:35:55,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:35:55,617 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-02-24 03:35:55,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-24 03:35:55,619 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:35:55,619 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:35:55,619 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 03:35:55,619 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:35:55,619 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:35:55,620 INFO L85 PathProgramCache]: Analyzing trace with hash -804916788, now seen corresponding path program 33 times [2022-02-24 03:35:55,620 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:35:55,620 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [711081589] [2022-02-24 03:35:55,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:35:55,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:35:55,649 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:35:55,675 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:35:55,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:35:55,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:35:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:35:56,003 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 03:37:18,561 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:37:18,561 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [711081589] [2022-02-24 03:37:18,562 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [711081589] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:37:18,562 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:37:18,562 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-24 03:37:18,562 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599092035] [2022-02-24 03:37:18,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:37:18,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-24 03:37:18,562 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:37:18,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-24 03:37:18,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1332, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:37:18,563 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:50,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:37:50,090 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-02-24 03:37:50,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-24 03:37:50,091 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 110 [2022-02-24 03:37:50,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:37:50,091 INFO L225 Difference]: With dead ends: 124 [2022-02-24 03:37:50,091 INFO L226 Difference]: Without dead ends: 116 [2022-02-24 03:37:50,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 7 SyntacticMatches, 67 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 661 ImplicationChecksByTransitivity, 112.9s TimeCoverageRelationStatistics Valid=211, Invalid=4901, Unknown=0, NotChecked=0, Total=5112 [2022-02-24 03:37:50,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 79 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 3707 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3744 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3707 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 03:37:50,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 184 Invalid, 3744 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3707 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 03:37:50,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-24 03:37:50,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-02-24 03:37:50,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 110 states have (on average 1.018181818181818) internal successors, (112), 110 states have internal predecessors, (112), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:50,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-02-24 03:37:50,106 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-02-24 03:37:50,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:37:50,107 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-02-24 03:37:50,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.864864864864865) internal successors, (106), 36 states have internal predecessors, (106), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:37:50,107 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-02-24 03:37:50,107 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-24 03:37:50,107 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:37:50,108 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:37:50,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 03:37:50,108 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:37:50,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:37:50,108 INFO L85 PathProgramCache]: Analyzing trace with hash -1325839388, now seen corresponding path program 34 times [2022-02-24 03:37:50,108 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:37:50,108 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1263550881] [2022-02-24 03:37:50,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:37:50,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:37:50,133 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:50,158 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:37:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:50,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:37:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:37:50,445 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 03:39:41,420 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:39:41,420 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1263550881] [2022-02-24 03:39:41,420 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1263550881] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:39:41,420 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:39:41,420 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-24 03:39:41,420 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515952609] [2022-02-24 03:39:41,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:39:41,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-24 03:39:41,421 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:39:41,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-24 03:39:41,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2022-02-24 03:39:41,421 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:24,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:40:24,269 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-02-24 03:40:24,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 03:40:24,270 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-24 03:40:24,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:40:24,270 INFO L225 Difference]: With dead ends: 127 [2022-02-24 03:40:24,270 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 03:40:24,271 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 9 SyntacticMatches, 69 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 152.2s TimeCoverageRelationStatistics Valid=213, Invalid=5043, Unknown=0, NotChecked=0, Total=5256 [2022-02-24 03:40:24,271 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 81 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 3921 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 3959 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 3921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 03:40:24,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 189 Invalid, 3959 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 3921 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 03:40:24,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 03:40:24,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-02-24 03:40:24,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:24,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-02-24 03:40:24,286 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2022-02-24 03:40:24,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:40:24,286 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-02-24 03:40:24,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.8684210526315788) internal successors, (109), 37 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:40:24,286 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-02-24 03:40:24,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-24 03:40:24,287 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:40:24,287 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:40:24,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 03:40:24,287 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:40:24,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:40:24,287 INFO L85 PathProgramCache]: Analyzing trace with hash 1880791756, now seen corresponding path program 35 times [2022-02-24 03:40:24,287 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:40:24,287 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1489165537] [2022-02-24 03:40:24,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:40:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:40:24,313 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:24,338 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:40:24,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:24,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:40:24,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:40:24,696 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 03:42:38,079 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 03:42:38,079 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1489165537] [2022-02-24 03:42:38,079 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1489165537] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 03:42:38,079 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 03:42:38,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-24 03:42:38,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719412545] [2022-02-24 03:42:38,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 03:42:38,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-24 03:42:38,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 03:42:38,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-24 03:42:38,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-02-24 03:42:38,081 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:26,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 03:43:26,088 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-02-24 03:43:26,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-24 03:43:26,088 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 116 [2022-02-24 03:43:26,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 03:43:26,091 INFO L225 Difference]: With dead ends: 130 [2022-02-24 03:43:26,091 INFO L226 Difference]: Without dead ends: 122 [2022-02-24 03:43:26,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 9 SyntacticMatches, 71 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 179.8s TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2022-02-24 03:43:26,092 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 83 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 4180 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-24 03:43:26,092 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 194 Invalid, 4180 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4141 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-24 03:43:26,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-24 03:43:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-02-24 03:43:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 116 states have (on average 1.0172413793103448) internal successors, (118), 116 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-02-24 03:43:26,107 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2022-02-24 03:43:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 03:43:26,107 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-02-24 03:43:26,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.871794871794872) internal successors, (112), 38 states have internal predecessors, (112), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 03:43:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-02-24 03:43:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-24 03:43:26,108 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 03:43:26,108 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 03:43:26,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 03:43:26,108 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 03:43:26,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 03:43:26,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1966605028, now seen corresponding path program 36 times [2022-02-24 03:43:26,109 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 03:43:26,109 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197311066] [2022-02-24 03:43:26,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 03:43:26,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 03:43:26,135 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:43:26,160 INFO L275 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-24 03:43:26,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:26,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 03:43:26,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 03:43:26,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked.