/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data --core.log.level.for.class de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf -i ../../../trunk/examples/svcomp/loops/sum01-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:12:06,463 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:12:06,465 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:12:06,512 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:12:06,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:12:06,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:12:06,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:12:06,543 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:12:06,548 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:12:06,549 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:12:06,549 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:12:06,549 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:12:06,549 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:12:06,550 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:12:06,550 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:12:06,551 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:12:06,551 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:12:06,551 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:12:06,551 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:12:06,553 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:12:06,554 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:12:06,554 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:12:06,554 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:12:06,554 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:12:06,737 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:12:06,754 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:12:06,755 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:12:06,756 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:12:06,756 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:12:06,757 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/sum01-1.i [2022-02-15 01:12:06,808 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd77df321/0adbd82b7dce40dfbf7a6550615ee748/FLAG085dce14f [2022-02-15 01:12:07,171 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:12:07,172 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/sum01-1.i [2022-02-15 01:12:07,179 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd77df321/0adbd82b7dce40dfbf7a6550615ee748/FLAG085dce14f [2022-02-15 01:12:07,193 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dd77df321/0adbd82b7dce40dfbf7a6550615ee748 [2022-02-15 01:12:07,195 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:12:07,197 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:12:07,198 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:12:07,198 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:12:07,201 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:12:07,201 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,202 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@20c65965 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07, skipping insertion in model container [2022-02-15 01:12:07,203 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,207 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:12:07,218 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:12:07,347 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/sum01-1.i[808,821] [2022-02-15 01:12:07,354 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:12:07,359 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:12:07,365 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/sum01-1.i[808,821] [2022-02-15 01:12:07,368 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:12:07,379 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:12:07,379 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07 WrapperNode [2022-02-15 01:12:07,379 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:12:07,380 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:12:07,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:12:07,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:12:07,386 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,386 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,390 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,390 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,392 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,394 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,394 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,395 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:12:07,396 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:12:07,396 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:12:07,396 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:12:07,396 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (1/1) ... [2022-02-15 01:12:07,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:12:07,407 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:12:07,415 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:12:07,431 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:12:07,441 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:12:07,442 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:12:07,442 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:12:07,442 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-15 01:12:07,442 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:12:07,442 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_uint [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:12:07,443 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:12:07,482 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:12:07,483 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:12:07,546 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:12:07,550 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:12:07,550 INFO L299 CfgBuilder]: Removed 1 assume(true) statements. [2022-02-15 01:12:07,551 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:07 BoogieIcfgContainer [2022-02-15 01:12:07,551 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:12:07,552 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:12:07,552 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:12:07,560 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:12:07,560 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:12:07" (1/3) ... [2022-02-15 01:12:07,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e08824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:07, skipping insertion in model container [2022-02-15 01:12:07,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:12:07" (2/3) ... [2022-02-15 01:12:07,561 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@21e08824 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:12:07, skipping insertion in model container [2022-02-15 01:12:07,561 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:12:07" (3/3) ... [2022-02-15 01:12:07,562 INFO L111 eAbstractionObserver]: Analyzing ICFG sum01-1.i [2022-02-15 01:12:07,565 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:12:07,565 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:12:07,588 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:12:07,592 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:12:07,593 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:12:07,600 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-15 01:12:07,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 01:12:07,604 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:07,604 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:07,605 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:07,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:07,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1466806487, now seen corresponding path program 1 times [2022-02-15 01:12:07,612 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:07,612 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [926697778] [2022-02-15 01:12:07,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:07,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:07,648 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:07,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:07,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:07,712 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:07,712 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [926697778] [2022-02-15 01:12:07,713 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [926697778] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:07,713 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:07,713 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-15 01:12:07,714 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1629257108] [2022-02-15 01:12:07,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:07,717 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-15 01:12:07,717 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:07,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-15 01:12:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-15 01:12:07,759 INFO L87 Difference]: Start difference. First operand has 20 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 13 states have internal predecessors, (17), 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) [2022-02-15 01:12:07,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:07,807 INFO L93 Difference]: Finished difference Result 31 states and 35 transitions. [2022-02-15 01:12:07,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-15 01:12:07,809 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 [2022-02-15 01:12:07,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:07,812 INFO L225 Difference]: With dead ends: 31 [2022-02-15 01:12:07,812 INFO L226 Difference]: Without dead ends: 14 [2022-02-15 01:12:07,814 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 [2022-02-15 01:12:07,816 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 12 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 23 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 [2022-02-15 01:12:07,816 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 23 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:12:07,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2022-02-15 01:12:07,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2022-02-15 01:12:07,859 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) [2022-02-15 01:12:07,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2022-02-15 01:12:07,861 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 11 [2022-02-15 01:12:07,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:07,861 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2022-02-15 01:12:07,861 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) [2022-02-15 01:12:07,861 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2022-02-15 01:12:07,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2022-02-15 01:12:07,861 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:07,861 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:07,862 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:12:07,862 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:07,862 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:07,862 INFO L85 PathProgramCache]: Analyzing trace with hash 1456647756, now seen corresponding path program 1 times [2022-02-15 01:12:07,862 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:07,863 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [167804287] [2022-02-15 01:12:07,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:07,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:07,865 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:12:07,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:07,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:07,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:07,983 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:07,983 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [167804287] [2022-02-15 01:12:07,983 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [167804287] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:07,983 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:07,983 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:12:07,983 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405731879] [2022-02-15 01:12:07,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:07,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:12:07,984 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:07,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:12:07,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:12:07,984 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-02-15 01:12:08,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:08,067 INFO L93 Difference]: Finished difference Result 22 states and 24 transitions. [2022-02-15 01:12:08,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:12:08,068 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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 [2022-02-15 01:12:08,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:08,068 INFO L225 Difference]: With dead ends: 22 [2022-02-15 01:12:08,068 INFO L226 Difference]: Without dead ends: 17 [2022-02-15 01:12:08,069 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:12:08,070 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:08,070 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 29 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:12:08,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2022-02-15 01:12:08,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2022-02-15 01:12:08,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.25) internal successors, (15), 12 states have internal predecessors, (15), 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) [2022-02-15 01:12:08,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 19 transitions. [2022-02-15 01:12:08,074 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 19 transitions. Word has length 11 [2022-02-15 01:12:08,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:08,074 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 19 transitions. [2022-02-15 01:12:08,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.1666666666666667) internal successors, (7), 4 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) [2022-02-15 01:12:08,075 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 19 transitions. [2022-02-15 01:12:08,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2022-02-15 01:12:08,075 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:08,078 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:08,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:12:08,080 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:08,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:08,083 INFO L85 PathProgramCache]: Analyzing trace with hash 193151625, now seen corresponding path program 1 times [2022-02-15 01:12:08,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:08,087 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [643412723] [2022-02-15 01:12:08,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:08,265 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:08,265 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:08,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:08,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:08,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:08,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:08,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:08,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:08,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [643412723] [2022-02-15 01:12:08,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [643412723] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:08,575 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:08,575 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:12:08,575 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042944128] [2022-02-15 01:12:08,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:08,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:12:08,576 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:08,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:12:08,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:12:08,578 INFO L87 Difference]: Start difference. First operand 17 states and 19 transitions. Second operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:08,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:08,898 INFO L93 Difference]: Finished difference Result 34 states and 40 transitions. [2022-02-15 01:12:08,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:12:08,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 14 [2022-02-15 01:12:08,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:08,899 INFO L225 Difference]: With dead ends: 34 [2022-02-15 01:12:08,899 INFO L226 Difference]: Without dead ends: 20 [2022-02-15 01:12:08,900 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:12:08,901 INFO L933 BasicCegarLoop]: 9 mSDtfsCounter, 21 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 92 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 92 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:08,901 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 46 Invalid, 102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 92 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:08,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2022-02-15 01:12:08,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2022-02-15 01:12:08,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 14 states have (on average 1.2142857142857142) internal successors, (17), 14 states have internal predecessors, (17), 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) [2022-02-15 01:12:08,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 21 transitions. [2022-02-15 01:12:08,905 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 21 transitions. Word has length 14 [2022-02-15 01:12:08,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:08,906 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 21 transitions. [2022-02-15 01:12:08,906 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 8 states have internal predecessors, (10), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:08,906 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 21 transitions. [2022-02-15 01:12:08,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-15 01:12:08,906 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:08,906 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:08,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:12:08,906 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:08,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:08,907 INFO L85 PathProgramCache]: Analyzing trace with hash -2046664786, now seen corresponding path program 1 times [2022-02-15 01:12:08,907 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:08,907 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1718022943] [2022-02-15 01:12:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:08,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:08,979 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:09,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:09,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:09,091 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:09,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:09,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:09,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:09,248 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:09,248 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1718022943] [2022-02-15 01:12:09,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1718022943] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:09,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:09,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:12:09,249 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926865553] [2022-02-15 01:12:09,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:09,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:12:09,250 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:09,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:12:09,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:12:09,250 INFO L87 Difference]: Start difference. First operand 19 states and 21 transitions. Second operand has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:09,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:09,349 INFO L93 Difference]: Finished difference Result 30 states and 34 transitions. [2022-02-15 01:12:09,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:12:09,349 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-15 01:12:09,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:09,349 INFO L225 Difference]: With dead ends: 30 [2022-02-15 01:12:09,350 INFO L226 Difference]: Without dead ends: 22 [2022-02-15 01:12:09,350 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:12:09,351 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 13 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 13 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 80 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:09,351 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [13 Valid, 44 Invalid, 80 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:12:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2022-02-15 01:12:09,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2022-02-15 01:12:09,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 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) [2022-02-15 01:12:09,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2022-02-15 01:12:09,355 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2022-02-15 01:12:09,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:09,355 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2022-02-15 01:12:09,355 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 1.3) internal successors, (13), 9 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:09,356 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2022-02-15 01:12:09,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2022-02-15 01:12:09,356 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:09,356 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:09,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:12:09,356 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:09,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:09,357 INFO L85 PathProgramCache]: Analyzing trace with hash -1412427221, now seen corresponding path program 2 times [2022-02-15 01:12:09,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:09,357 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1753239990] [2022-02-15 01:12:09,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:09,420 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:09,420 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:09,469 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:09,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:09,515 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:09,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:09,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:09,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:09,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:09,708 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:09,708 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1753239990] [2022-02-15 01:12:09,708 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1753239990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:09,708 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:09,708 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:12:09,708 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199396228] [2022-02-15 01:12:09,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:09,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:12:09,709 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:09,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:12:09,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:12:09,709 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:09,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:09,846 INFO L93 Difference]: Finished difference Result 33 states and 37 transitions. [2022-02-15 01:12:09,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:12:09,846 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 20 [2022-02-15 01:12:09,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:09,847 INFO L225 Difference]: With dead ends: 33 [2022-02-15 01:12:09,847 INFO L226 Difference]: Without dead ends: 25 [2022-02-15 01:12:09,847 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:12:09,848 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 16 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 135 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 143 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 135 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:09,848 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 59 Invalid, 143 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 135 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:09,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-02-15 01:12:09,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2022-02-15 01:12:09,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 20 states have (on average 1.15) internal successors, (23), 20 states have internal predecessors, (23), 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) [2022-02-15 01:12:09,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 27 transitions. [2022-02-15 01:12:09,867 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 27 transitions. Word has length 20 [2022-02-15 01:12:09,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:09,867 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 27 transitions. [2022-02-15 01:12:09,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 12 states have internal predecessors, (16), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:09,867 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 27 transitions. [2022-02-15 01:12:09,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-15 01:12:09,868 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:09,868 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:12:09,868 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:09,868 INFO L85 PathProgramCache]: Analyzing trace with hash -402263410, now seen corresponding path program 3 times [2022-02-15 01:12:09,868 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:09,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [556389279] [2022-02-15 01:12:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:09,934 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:09,934 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:09,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:10,046 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:10,047 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:10,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:10,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:10,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:10,257 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:10,257 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [556389279] [2022-02-15 01:12:10,257 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [556389279] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:10,257 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:10,258 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:12:10,258 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079016427] [2022-02-15 01:12:10,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:10,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:12:10,258 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:12:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:12:10,259 INFO L87 Difference]: Start difference. First operand 25 states and 27 transitions. Second operand has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:10,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:10,451 INFO L93 Difference]: Finished difference Result 36 states and 40 transitions. [2022-02-15 01:12:10,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:12:10,451 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-15 01:12:10,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:10,452 INFO L225 Difference]: With dead ends: 36 [2022-02-15 01:12:10,452 INFO L226 Difference]: Without dead ends: 28 [2022-02-15 01:12:10,452 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:12:10,453 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 17 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:10,453 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 84 Invalid, 257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:10,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2022-02-15 01:12:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2022-02-15 01:12:10,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 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) [2022-02-15 01:12:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2022-02-15 01:12:10,457 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2022-02-15 01:12:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:10,458 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2022-02-15 01:12:10,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.1875) internal successors, (19), 15 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:10,458 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2022-02-15 01:12:10,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-02-15 01:12:10,458 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:10,458 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:10,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:12:10,458 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:10,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:10,459 INFO L85 PathProgramCache]: Analyzing trace with hash -1448012981, now seen corresponding path program 4 times [2022-02-15 01:12:10,459 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:10,459 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449345054] [2022-02-15 01:12:10,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:10,519 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:10,519 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:10,552 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:10,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:10,607 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:10,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:10,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,685 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:10,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:10,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:10,880 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:10,880 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449345054] [2022-02-15 01:12:10,880 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [449345054] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:10,880 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:10,880 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:12:10,881 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006755229] [2022-02-15 01:12:10,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:10,881 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:12:10,881 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:10,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:12:10,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:12:10,882 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:11,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:11,131 INFO L93 Difference]: Finished difference Result 39 states and 43 transitions. [2022-02-15 01:12:11,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:12:11,132 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2022-02-15 01:12:11,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:11,132 INFO L225 Difference]: With dead ends: 39 [2022-02-15 01:12:11,132 INFO L226 Difference]: Without dead ends: 31 [2022-02-15 01:12:11,133 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=1047, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:12:11,133 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 20 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:11,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 79 Invalid, 287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:11,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2022-02-15 01:12:11,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2022-02-15 01:12:11,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.1153846153846154) internal successors, (29), 26 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:11,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 33 transitions. [2022-02-15 01:12:11,138 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 33 transitions. Word has length 26 [2022-02-15 01:12:11,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:11,138 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 33 transitions. [2022-02-15 01:12:11,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 18 states have internal predecessors, (22), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:11,138 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 33 transitions. [2022-02-15 01:12:11,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-15 01:12:11,138 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:11,139 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:11,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:12:11,139 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:11,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:11,139 INFO L85 PathProgramCache]: Analyzing trace with hash 319282542, now seen corresponding path program 5 times [2022-02-15 01:12:11,139 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:11,139 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1011293802] [2022-02-15 01:12:11,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:11,196 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:11,197 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:11,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:11,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:11,293 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:11,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:11,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:11,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:11,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:11,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:11,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:11,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1011293802] [2022-02-15 01:12:11,608 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1011293802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:11,608 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:11,608 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:12:11,608 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980265832] [2022-02-15 01:12:11,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:11,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:12:11,609 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:11,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:12:11,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:12:11,610 INFO L87 Difference]: Start difference. First operand 31 states and 33 transitions. Second operand has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:11,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:11,946 INFO L93 Difference]: Finished difference Result 42 states and 46 transitions. [2022-02-15 01:12:11,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:12:11,946 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-15 01:12:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:11,948 INFO L225 Difference]: With dead ends: 42 [2022-02-15 01:12:11,948 INFO L226 Difference]: Without dead ends: 34 [2022-02-15 01:12:11,949 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 308 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=170, Invalid=1470, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:12:11,950 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 21 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 429 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 443 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 429 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:11,950 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [21 Valid, 104 Invalid, 443 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 429 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:12:11,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2022-02-15 01:12:11,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2022-02-15 01:12:11,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 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) [2022-02-15 01:12:11,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2022-02-15 01:12:11,959 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2022-02-15 01:12:11,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:11,962 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2022-02-15 01:12:11,962 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 1.1363636363636365) internal successors, (25), 21 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2022-02-15 01:12:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2022-02-15 01:12:11,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:11,963 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:11,963 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:12:11,963 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:11,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:11,963 INFO L85 PathProgramCache]: Analyzing trace with hash 2111093867, now seen corresponding path program 6 times [2022-02-15 01:12:11,963 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:11,963 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1384319175] [2022-02-15 01:12:11,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:12,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:12,026 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:12,058 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:12,122 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:12,123 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:12,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:12,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:12,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:12,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:12,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:12,506 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:12,506 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1384319175] [2022-02-15 01:12:12,506 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1384319175] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:12,506 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:12,507 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:12:12,507 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100343269] [2022-02-15 01:12:12,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:12,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:12:12,507 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:12,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:12:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:12:12,508 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:12,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:12,937 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2022-02-15 01:12:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:12:12,937 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 32 [2022-02-15 01:12:12,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:12,938 INFO L225 Difference]: With dead ends: 45 [2022-02-15 01:12:12,938 INFO L226 Difference]: Without dead ends: 37 [2022-02-15 01:12:12,938 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=197, Invalid=1965, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:12:12,940 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 24 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 488 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 504 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:12,940 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [24 Valid, 104 Invalid, 504 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 488 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:12,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-02-15 01:12:12,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2022-02-15 01:12:12,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.09375) internal successors, (35), 32 states have internal predecessors, (35), 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) [2022-02-15 01:12:12,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2022-02-15 01:12:12,951 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 32 [2022-02-15 01:12:12,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:12,951 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2022-02-15 01:12:12,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 1.12) internal successors, (28), 24 states have internal predecessors, (28), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:12,951 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2022-02-15 01:12:12,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-15 01:12:12,953 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:12,954 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:12,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:12:12,954 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:12,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:12,954 INFO L85 PathProgramCache]: Analyzing trace with hash -186245042, now seen corresponding path program 7 times [2022-02-15 01:12:12,954 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:12,954 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [193843634] [2022-02-15 01:12:12,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:13,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:13,014 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:13,052 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:13,109 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:13,109 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:13,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:13,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:13,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:13,511 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:13,511 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [193843634] [2022-02-15 01:12:13,512 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [193843634] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:13,512 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:13,512 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:12:13,512 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64426255] [2022-02-15 01:12:13,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:13,513 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:12:13,513 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:13,513 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:12:13,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=779, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:12:13,514 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:14,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:14,053 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2022-02-15 01:12:14,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:12:14,053 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-15 01:12:14,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:14,054 INFO L225 Difference]: With dead ends: 48 [2022-02-15 01:12:14,054 INFO L226 Difference]: Without dead ends: 40 [2022-02-15 01:12:14,054 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 552 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=224, Invalid=2532, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:12:14,055 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 25 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 659 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 124 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:14,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [25 Valid, 124 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 659 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:14,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2022-02-15 01:12:14,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2022-02-15 01:12:14,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 states have internal predecessors, (38), 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) [2022-02-15 01:12:14,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2022-02-15 01:12:14,059 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2022-02-15 01:12:14,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:14,059 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2022-02-15 01:12:14,059 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.1071428571428572) internal successors, (31), 27 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:14,060 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2022-02-15 01:12:14,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2022-02-15 01:12:14,060 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:14,060 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:14,060 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:12:14,060 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:14,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:14,060 INFO L85 PathProgramCache]: Analyzing trace with hash 94178699, now seen corresponding path program 8 times [2022-02-15 01:12:14,060 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:14,060 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2044209007] [2022-02-15 01:12:14,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:14,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:14,135 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:14,183 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:14,241 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:14,241 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:14,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:14,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:14,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:14,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:14,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:14,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:14,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2044209007] [2022-02-15 01:12:14,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2044209007] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:14,722 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:14,722 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:12:14,722 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080562906] [2022-02-15 01:12:14,722 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:14,722 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:12:14,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:14,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:12:14,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=955, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:12:14,723 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:15,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:15,317 INFO L93 Difference]: Finished difference Result 51 states and 55 transitions. [2022-02-15 01:12:15,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:12:15,317 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 38 [2022-02-15 01:12:15,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:15,318 INFO L225 Difference]: With dead ends: 51 [2022-02-15 01:12:15,318 INFO L226 Difference]: Without dead ends: 43 [2022-02-15 01:12:15,319 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 6 SyntacticMatches, 2 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=3171, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:12:15,319 INFO L933 BasicCegarLoop]: 12 mSDtfsCounter, 28 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 792 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:15,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [28 Valid, 134 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 792 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:12:15,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-02-15 01:12:15,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2022-02-15 01:12:15,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 38 states have (on average 1.0789473684210527) internal successors, (41), 38 states have internal predecessors, (41), 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) [2022-02-15 01:12:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-02-15 01:12:15,323 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 38 [2022-02-15 01:12:15,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:15,324 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-02-15 01:12:15,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 30 states have internal predecessors, (34), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:15,324 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-02-15 01:12:15,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2022-02-15 01:12:15,324 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:15,324 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:15,324 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:12:15,324 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:15,325 INFO L85 PathProgramCache]: Analyzing trace with hash 486456110, now seen corresponding path program 9 times [2022-02-15 01:12:15,325 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:15,325 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1794864722] [2022-02-15 01:12:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:15,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:15,379 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation PRECISE [2022-02-15 01:12:15,418 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:15,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:15,456 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:15,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:15,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:16,008 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:16,008 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1794864722] [2022-02-15 01:12:16,008 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1794864722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:16,009 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:16,009 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:12:16,009 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744752185] [2022-02-15 01:12:16,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:16,009 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:12:16,009 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:16,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:12:16,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1219, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:12:16,010 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:16,728 INFO L93 Difference]: Finished difference Result 58 states and 64 transitions. [2022-02-15 01:12:16,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:12:16,728 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2022-02-15 01:12:16,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:16,728 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:12:16,729 INFO L226 Difference]: Without dead ends: 47 [2022-02-15 01:12:16,730 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 957 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=284, Invalid=4138, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:12:16,730 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 38 mSDsluCounter, 132 mSDsCounter, 0 mSdLazyCounter, 1018 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 1043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1018 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:16,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 142 Invalid, 1043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1018 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:16,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2022-02-15 01:12:16,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 46. [2022-02-15 01:12:16,734 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) [2022-02-15 01:12:16,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2022-02-15 01:12:16,735 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 41 [2022-02-15 01:12:16,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:16,735 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2022-02-15 01:12:16,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 34 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:16,736 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2022-02-15 01:12:16,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-02-15 01:12:16,736 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:16,736 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:16,737 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:12:16,737 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:16,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:16,737 INFO L85 PathProgramCache]: Analyzing trace with hash -176232215, now seen corresponding path program 10 times [2022-02-15 01:12:16,737 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:16,737 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668533053] [2022-02-15 01:12:16,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:16,791 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:16,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:16,841 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:16,877 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:16,936 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:16,936 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:16,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:17,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:17,430 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:17,431 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668533053] [2022-02-15 01:12:17,431 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668533053] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:17,431 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:17,431 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:12:17,431 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294527190] [2022-02-15 01:12:17,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:17,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:12:17,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:17,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:12:17,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1364, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:12:17,432 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:18,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:18,120 INFO L93 Difference]: Finished difference Result 58 states and 62 transitions. [2022-02-15 01:12:18,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:12:18,120 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 44 [2022-02-15 01:12:18,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:18,120 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:12:18,121 INFO L226 Difference]: Without dead ends: 50 [2022-02-15 01:12:18,122 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 7 SyntacticMatches, 2 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1168 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=299, Invalid=4671, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:12:18,122 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 42 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 1021 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 1046 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 1021 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:18,122 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [42 Valid, 132 Invalid, 1046 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 1021 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:18,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2022-02-15 01:12:18,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2022-02-15 01:12:18,126 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) [2022-02-15 01:12:18,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2022-02-15 01:12:18,127 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 44 [2022-02-15 01:12:18,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:18,127 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2022-02-15 01:12:18,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 36 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:18,127 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2022-02-15 01:12:18,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-15 01:12:18,127 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:18,127 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 9, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:18,127 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:12:18,128 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:18,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:18,128 INFO L85 PathProgramCache]: Analyzing trace with hash 1640537422, now seen corresponding path program 11 times [2022-02-15 01:12:18,128 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:18,128 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139954374] [2022-02-15 01:12:18,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:18,185 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:18,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:18,217 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:18,262 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:18,303 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:18,303 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:18,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:18,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:18,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:18,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:19,042 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:19,042 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139954374] [2022-02-15 01:12:19,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [139954374] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:19,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:19,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:12:19,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024584505] [2022-02-15 01:12:19,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:19,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:12:19,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:19,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:12:19,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=1517, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:12:19,043 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:19,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:19,905 INFO L93 Difference]: Finished difference Result 61 states and 65 transitions. [2022-02-15 01:12:19,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:12:19,905 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-02-15 01:12:19,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:19,906 INFO L225 Difference]: With dead ends: 61 [2022-02-15 01:12:19,906 INFO L226 Difference]: Without dead ends: 53 [2022-02-15 01:12:19,907 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1389 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=314, Invalid=5236, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:12:19,907 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 45 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 1265 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 45 SdHoareTripleChecker+Valid, 152 SdHoareTripleChecker+Invalid, 1291 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:19,907 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [45 Valid, 152 Invalid, 1291 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1265 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:19,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-02-15 01:12:19,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 52. [2022-02-15 01:12:19,912 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) [2022-02-15 01:12:19,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2022-02-15 01:12:19,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 47 [2022-02-15 01:12:19,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:19,912 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2022-02-15 01:12:19,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 38 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:19,912 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2022-02-15 01:12:19,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2022-02-15 01:12:19,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:19,913 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 9, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:19,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:12:19,913 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:19,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:19,913 INFO L85 PathProgramCache]: Analyzing trace with hash -153070903, now seen corresponding path program 12 times [2022-02-15 01:12:19,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:19,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1492677161] [2022-02-15 01:12:19,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:19,960 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:20,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:20,001 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:20,033 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:20,089 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:20,089 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:20,089 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:20,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:20,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:20,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:20,651 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:20,652 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1492677161] [2022-02-15 01:12:20,652 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1492677161] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:20,652 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:20,652 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:12:20,652 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724507656] [2022-02-15 01:12:20,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:20,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:12:20,653 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:20,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:12:20,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1678, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:12:20,654 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:21,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:21,323 INFO L93 Difference]: Finished difference Result 64 states and 68 transitions. [2022-02-15 01:12:21,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:12:21,324 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 50 [2022-02-15 01:12:21,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:21,324 INFO L225 Difference]: With dead ends: 64 [2022-02-15 01:12:21,324 INFO L226 Difference]: Without dead ends: 56 [2022-02-15 01:12:21,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=329, Invalid=5833, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:12:21,328 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 49 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 1534 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 172 SdHoareTripleChecker+Invalid, 1561 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 1534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:21,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [49 Valid, 172 Invalid, 1561 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 1534 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:21,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2022-02-15 01:12:21,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2022-02-15 01:12:21,353 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) [2022-02-15 01:12:21,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2022-02-15 01:12:21,354 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 50 [2022-02-15 01:12:21,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:21,354 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2022-02-15 01:12:21,354 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.1219512195121952) internal successors, (46), 40 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:21,354 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2022-02-15 01:12:21,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2022-02-15 01:12:21,355 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:21,355 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 9, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:21,355 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:12:21,355 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:21,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:21,356 INFO L85 PathProgramCache]: Analyzing trace with hash 149448558, now seen corresponding path program 13 times [2022-02-15 01:12:21,356 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:21,356 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1236503157] [2022-02-15 01:12:21,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:21,410 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:21,451 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:21,451 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:21,473 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:21,509 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:21,510 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:21,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:21,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:21,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:21,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:21,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:22,007 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:22,007 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1236503157] [2022-02-15 01:12:22,007 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1236503157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:22,007 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:22,007 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:12:22,007 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946431052] [2022-02-15 01:12:22,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:22,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:12:22,008 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:22,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:12:22,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=1847, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:12:22,009 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:22,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:22,653 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2022-02-15 01:12:22,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:12:22,665 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 53 [2022-02-15 01:12:22,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:22,666 INFO L225 Difference]: With dead ends: 67 [2022-02-15 01:12:22,666 INFO L226 Difference]: Without dead ends: 59 [2022-02-15 01:12:22,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 9 SyntacticMatches, 3 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=344, Invalid=6462, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:12:22,668 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 54 mSDsluCounter, 157 mSDsCounter, 0 mSdLazyCounter, 1585 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 1613 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 1585 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:22,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 167 Invalid, 1613 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 1585 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:12:22,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-15 01:12:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 58. [2022-02-15 01:12:22,691 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) [2022-02-15 01:12:22,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2022-02-15 01:12:22,692 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 53 [2022-02-15 01:12:22,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:22,692 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2022-02-15 01:12:22,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 1.1395348837209303) internal successors, (49), 42 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:22,692 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2022-02-15 01:12:22,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-02-15 01:12:22,695 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:22,695 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 9, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:22,695 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:12:22,695 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:22,695 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:22,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1665324201, now seen corresponding path program 14 times [2022-02-15 01:12:22,695 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:22,695 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [109316529] [2022-02-15 01:12:22,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:22,748 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:22,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:22,775 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:22,795 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:22,822 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:22,822 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:22,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:22,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:22,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:22,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:22,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:23,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:23,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [109316529] [2022-02-15 01:12:23,634 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [109316529] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:23,634 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:23,634 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:12:23,634 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145159475] [2022-02-15 01:12:23,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:23,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:12:23,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:23,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:12:23,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=2024, Unknown=0, NotChecked=0, Total=2162 [2022-02-15 01:12:23,636 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:24,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:24,644 INFO L93 Difference]: Finished difference Result 70 states and 74 transitions. [2022-02-15 01:12:24,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:12:24,645 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 56 [2022-02-15 01:12:24,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:24,645 INFO L225 Difference]: With dead ends: 70 [2022-02-15 01:12:24,645 INFO L226 Difference]: Without dead ends: 62 [2022-02-15 01:12:24,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=359, Invalid=7123, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:12:24,648 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 58 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 1837 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 58 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 1866 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 1837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:24,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [58 Valid, 182 Invalid, 1866 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 1837 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:24,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2022-02-15 01:12:24,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2022-02-15 01:12:24,656 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) [2022-02-15 01:12:24,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2022-02-15 01:12:24,656 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 56 [2022-02-15 01:12:24,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:24,657 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2022-02-15 01:12:24,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 44 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:24,657 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2022-02-15 01:12:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-02-15 01:12:24,658 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:24,658 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:24,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:12:24,658 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:24,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:24,658 INFO L85 PathProgramCache]: Analyzing trace with hash -464512626, now seen corresponding path program 15 times [2022-02-15 01:12:24,658 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:24,658 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1571082381] [2022-02-15 01:12:24,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:24,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,741 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,741 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:24,770 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:24,840 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:24,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:24,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:24,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:25,674 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:25,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1571082381] [2022-02-15 01:12:25,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1571082381] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:25,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:25,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:12:25,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133959994] [2022-02-15 01:12:25,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:12:25,675 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:25,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:12:25,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=2209, Unknown=0, NotChecked=0, Total=2352 [2022-02-15 01:12:25,676 INFO L87 Difference]: Start difference. First operand 61 states and 62 transitions. Second operand has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:26,857 INFO L93 Difference]: Finished difference Result 73 states and 77 transitions. [2022-02-15 01:12:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:12:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-02-15 01:12:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:26,858 INFO L225 Difference]: With dead ends: 73 [2022-02-15 01:12:26,858 INFO L226 Difference]: Without dead ends: 65 [2022-02-15 01:12:26,858 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2373 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=374, Invalid=7816, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:12:26,859 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 62 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 2106 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 2136 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 2106 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:26,859 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 197 Invalid, 2136 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 2106 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:26,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2022-02-15 01:12:26,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2022-02-15 01:12:26,864 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) [2022-02-15 01:12:26,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 65 transitions. [2022-02-15 01:12:26,865 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 65 transitions. Word has length 59 [2022-02-15 01:12:26,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:26,865 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 65 transitions. [2022-02-15 01:12:26,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 1.1702127659574468) internal successors, (55), 46 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:26,865 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 65 transitions. [2022-02-15 01:12:26,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-02-15 01:12:26,865 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:26,865 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:26,865 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:12:26,866 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:26,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:26,866 INFO L85 PathProgramCache]: Analyzing trace with hash -881561975, now seen corresponding path program 16 times [2022-02-15 01:12:26,866 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:26,866 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1393304228] [2022-02-15 01:12:26,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:26,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:26,948 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:26,948 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:26,978 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:27,031 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:27,031 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:27,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:27,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:27,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:27,742 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:27,742 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1393304228] [2022-02-15 01:12:27,742 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1393304228] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:27,742 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:27,742 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-02-15 01:12:27,742 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5222862] [2022-02-15 01:12:27,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:27,742 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-02-15 01:12:27,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:27,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-02-15 01:12:27,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=2402, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:12:27,743 INFO L87 Difference]: Start difference. First operand 64 states and 65 transitions. Second operand has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:28,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:28,881 INFO L93 Difference]: Finished difference Result 76 states and 80 transitions. [2022-02-15 01:12:28,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:12:28,882 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 62 [2022-02-15 01:12:28,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:28,882 INFO L225 Difference]: With dead ends: 76 [2022-02-15 01:12:28,882 INFO L226 Difference]: Without dead ends: 68 [2022-02-15 01:12:28,883 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2644 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=389, Invalid=8541, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:12:28,883 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 65 mSDsluCounter, 192 mSDsCounter, 0 mSdLazyCounter, 2278 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 2309 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2278 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:28,883 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 202 Invalid, 2309 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2278 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:28,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2022-02-15 01:12:28,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2022-02-15 01:12:28,888 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) [2022-02-15 01:12:28,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 68 transitions. [2022-02-15 01:12:28,888 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 68 transitions. Word has length 62 [2022-02-15 01:12:28,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:28,889 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 68 transitions. [2022-02-15 01:12:28,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 1.183673469387755) internal successors, (58), 48 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:28,889 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 68 transitions. [2022-02-15 01:12:28,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2022-02-15 01:12:28,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:28,889 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:28,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:12:28,889 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:28,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:28,890 INFO L85 PathProgramCache]: Analyzing trace with hash 141669294, now seen corresponding path program 17 times [2022-02-15 01:12:28,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:28,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1682452799] [2022-02-15 01:12:28,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:28,943 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:28,973 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:28,973 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:29,013 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:29,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:29,055 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:29,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:29,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:29,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:29,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:29,701 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:29,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1682452799] [2022-02-15 01:12:29,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1682452799] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:29,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:29,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-02-15 01:12:29,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672278630] [2022-02-15 01:12:29,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:29,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-02-15 01:12:29,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:29,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-02-15 01:12:29,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=2603, Unknown=0, NotChecked=0, Total=2756 [2022-02-15 01:12:29,703 INFO L87 Difference]: Start difference. First operand 67 states and 68 transitions. Second operand has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:30,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:30,673 INFO L93 Difference]: Finished difference Result 79 states and 83 transitions. [2022-02-15 01:12:30,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-02-15 01:12:30,674 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 65 [2022-02-15 01:12:30,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:30,674 INFO L225 Difference]: With dead ends: 79 [2022-02-15 01:12:30,674 INFO L226 Difference]: Without dead ends: 71 [2022-02-15 01:12:30,675 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2925 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=404, Invalid=9298, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:12:30,676 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 69 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 69 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2670 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:30,676 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [69 Valid, 222 Invalid, 2670 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:30,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2022-02-15 01:12:30,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2022-02-15 01:12:30,681 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) [2022-02-15 01:12:30,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 71 transitions. [2022-02-15 01:12:30,681 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 71 transitions. Word has length 65 [2022-02-15 01:12:30,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:30,681 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 71 transitions. [2022-02-15 01:12:30,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 51 states have (on average 1.196078431372549) internal successors, (61), 50 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:30,681 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 71 transitions. [2022-02-15 01:12:30,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-15 01:12:30,682 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:30,682 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:30,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:12:30,682 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:30,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:30,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1841504361, now seen corresponding path program 18 times [2022-02-15 01:12:30,682 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:30,682 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1281457667] [2022-02-15 01:12:30,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:30,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:30,746 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:30,747 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:30,766 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:30,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:30,809 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:30,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:30,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:30,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:31,838 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:31,838 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1281457667] [2022-02-15 01:12:31,838 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1281457667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:31,838 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:31,838 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-02-15 01:12:31,838 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448624476] [2022-02-15 01:12:31,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:31,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-02-15 01:12:31,839 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:31,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-02-15 01:12:31,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=158, Invalid=2812, Unknown=0, NotChecked=0, Total=2970 [2022-02-15 01:12:31,840 INFO L87 Difference]: Start difference. First operand 70 states and 71 transitions. Second operand has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 52 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:32,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:32,732 INFO L93 Difference]: Finished difference Result 82 states and 86 transitions. [2022-02-15 01:12:32,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-02-15 01:12:32,732 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 52 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 68 [2022-02-15 01:12:32,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:32,732 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:12:32,732 INFO L226 Difference]: Without dead ends: 74 [2022-02-15 01:12:32,754 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3216 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=419, Invalid=10087, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:12:32,758 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 74 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 2384 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 2417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 2384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:32,758 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 192 Invalid, 2417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 2384 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:12:32,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-15 01:12:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2022-02-15 01:12:32,764 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) [2022-02-15 01:12:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 74 transitions. [2022-02-15 01:12:32,764 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 74 transitions. Word has length 68 [2022-02-15 01:12:32,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:32,764 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 74 transitions. [2022-02-15 01:12:32,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 53 states have (on average 1.2075471698113207) internal successors, (64), 52 states have internal predecessors, (64), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:32,764 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 74 transitions. [2022-02-15 01:12:32,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-02-15 01:12:32,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:32,765 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 11, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:32,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:12:32,765 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:32,765 INFO L85 PathProgramCache]: Analyzing trace with hash -331401778, now seen corresponding path program 19 times [2022-02-15 01:12:32,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:32,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472837288] [2022-02-15 01:12:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:32,809 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:32,830 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:32,831 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:32,863 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:32,907 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:32,907 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:32,907 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:32,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:32,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:32,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:32,987 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:33,741 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:33,741 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472837288] [2022-02-15 01:12:33,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472837288] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:33,741 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:33,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-02-15 01:12:33,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121317671] [2022-02-15 01:12:33,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:33,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-02-15 01:12:33,742 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-02-15 01:12:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=163, Invalid=3029, Unknown=0, NotChecked=0, Total=3192 [2022-02-15 01:12:33,742 INFO L87 Difference]: Start difference. First operand 73 states and 74 transitions. Second operand has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:34,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:34,767 INFO L93 Difference]: Finished difference Result 85 states and 89 transitions. [2022-02-15 01:12:34,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-02-15 01:12:34,767 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-02-15 01:12:34,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:34,768 INFO L225 Difference]: With dead ends: 85 [2022-02-15 01:12:34,768 INFO L226 Difference]: Without dead ends: 77 [2022-02-15 01:12:34,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3517 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=434, Invalid=10908, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 01:12:34,771 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 78 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 2896 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 2930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 2896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:34,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 222 Invalid, 2930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 2896 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:12:34,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-02-15 01:12:34,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 76. [2022-02-15 01:12:34,781 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) [2022-02-15 01:12:34,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 77 transitions. [2022-02-15 01:12:34,783 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 77 transitions. Word has length 71 [2022-02-15 01:12:34,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:34,783 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 77 transitions. [2022-02-15 01:12:34,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 1.2181818181818183) internal successors, (67), 54 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 77 transitions. [2022-02-15 01:12:34,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-02-15 01:12:34,784 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:34,784 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 12, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:34,784 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:12:34,784 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:34,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:34,785 INFO L85 PathProgramCache]: Analyzing trace with hash 368896585, now seen corresponding path program 20 times [2022-02-15 01:12:34,785 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:34,785 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [954247143] [2022-02-15 01:12:34,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:34,847 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:34,867 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:34,867 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:34,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:34,923 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:34,924 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:34,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:34,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:34,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:34,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:35,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:36,128 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:36,128 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [954247143] [2022-02-15 01:12:36,128 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [954247143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:36,128 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:36,128 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-02-15 01:12:36,128 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333096045] [2022-02-15 01:12:36,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:36,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-02-15 01:12:36,129 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:36,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-02-15 01:12:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=3254, Unknown=0, NotChecked=0, Total=3422 [2022-02-15 01:12:36,130 INFO L87 Difference]: Start difference. First operand 76 states and 77 transitions. Second operand has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:37,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:37,812 INFO L93 Difference]: Finished difference Result 88 states and 92 transitions. [2022-02-15 01:12:37,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-02-15 01:12:37,812 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 74 [2022-02-15 01:12:37,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:37,813 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:12:37,813 INFO L226 Difference]: Without dead ends: 80 [2022-02-15 01:12:37,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3828 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=449, Invalid=11761, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:12:37,814 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 82 mSDsluCounter, 217 mSDsCounter, 0 mSdLazyCounter, 3093 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 3128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 3093 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:37,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 227 Invalid, 3128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 3093 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:12:37,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-02-15 01:12:37,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-02-15 01:12:37,821 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) [2022-02-15 01:12:37,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 80 transitions. [2022-02-15 01:12:37,821 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 80 transitions. Word has length 74 [2022-02-15 01:12:37,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:37,821 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 80 transitions. [2022-02-15 01:12:37,822 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 1.2280701754385965) internal successors, (70), 56 states have internal predecessors, (70), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:37,822 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 80 transitions. [2022-02-15 01:12:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2022-02-15 01:12:37,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:37,822 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 13, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:37,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:12:37,822 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:37,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:37,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1993695250, now seen corresponding path program 21 times [2022-02-15 01:12:37,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:37,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1410057192] [2022-02-15 01:12:37,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:37,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:37,915 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:37,915 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:37,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:37,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:37,992 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:37,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:37,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:38,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:38,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:38,055 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:39,158 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:39,158 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1410057192] [2022-02-15 01:12:39,158 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1410057192] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:39,158 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:39,158 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-02-15 01:12:39,158 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046205020] [2022-02-15 01:12:39,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:39,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-02-15 01:12:39,159 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:39,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-02-15 01:12:39,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=3487, Unknown=0, NotChecked=0, Total=3660 [2022-02-15 01:12:39,160 INFO L87 Difference]: Start difference. First operand 79 states and 80 transitions. Second operand has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:40,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:40,807 INFO L93 Difference]: Finished difference Result 91 states and 95 transitions. [2022-02-15 01:12:40,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-02-15 01:12:40,808 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 77 [2022-02-15 01:12:40,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:40,808 INFO L225 Difference]: With dead ends: 91 [2022-02-15 01:12:40,808 INFO L226 Difference]: Without dead ends: 83 [2022-02-15 01:12:40,809 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 17 SyntacticMatches, 3 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=464, Invalid=12646, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:12:40,810 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 86 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 3155 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 3191 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 3155 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:40,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 222 Invalid, 3191 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 3155 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:12:40,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-02-15 01:12:40,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 82. [2022-02-15 01:12:40,816 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) [2022-02-15 01:12:40,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 83 transitions. [2022-02-15 01:12:40,816 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 83 transitions. Word has length 77 [2022-02-15 01:12:40,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:40,816 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 83 transitions. [2022-02-15 01:12:40,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 1.2372881355932204) internal successors, (73), 58 states have internal predecessors, (73), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:40,816 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 83 transitions. [2022-02-15 01:12:40,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-02-15 01:12:40,817 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:40,817 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 14, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:40,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:12:40,817 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:40,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:40,817 INFO L85 PathProgramCache]: Analyzing trace with hash -43004887, now seen corresponding path program 22 times [2022-02-15 01:12:40,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:40,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1087109090] [2022-02-15 01:12:40,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:40,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:40,927 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:40,928 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:40,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:41,010 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:41,010 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:41,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:41,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:41,951 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:41,951 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1087109090] [2022-02-15 01:12:41,951 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1087109090] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:41,951 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:41,951 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-02-15 01:12:41,951 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244197597] [2022-02-15 01:12:41,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:41,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-02-15 01:12:41,952 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:41,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-02-15 01:12:41,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=178, Invalid=3728, Unknown=0, NotChecked=0, Total=3906 [2022-02-15 01:12:41,952 INFO L87 Difference]: Start difference. First operand 82 states and 83 transitions. Second operand has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 60 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:43,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:43,545 INFO L93 Difference]: Finished difference Result 94 states and 98 transitions. [2022-02-15 01:12:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-02-15 01:12:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 60 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 80 [2022-02-15 01:12:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:43,546 INFO L225 Difference]: With dead ends: 94 [2022-02-15 01:12:43,546 INFO L226 Difference]: Without dead ends: 86 [2022-02-15 01:12:43,548 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4480 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=479, Invalid=13563, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 01:12:43,548 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 89 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 3584 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 3621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 3584 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:43,548 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 242 Invalid, 3621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 3584 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:12:43,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2022-02-15 01:12:43,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2022-02-15 01:12:43,558 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) [2022-02-15 01:12:43,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 86 transitions. [2022-02-15 01:12:43,559 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 86 transitions. Word has length 80 [2022-02-15 01:12:43,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:43,559 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 86 transitions. [2022-02-15 01:12:43,559 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 1.2459016393442623) internal successors, (76), 60 states have internal predecessors, (76), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:43,559 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 86 transitions. [2022-02-15 01:12:43,560 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-02-15 01:12:43,560 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:43,560 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 15, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:43,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:12:43,560 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:43,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:43,560 INFO L85 PathProgramCache]: Analyzing trace with hash 2066084366, now seen corresponding path program 23 times [2022-02-15 01:12:43,560 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:43,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [779298981] [2022-02-15 01:12:43,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:43,614 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:43,646 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:43,647 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:43,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:43,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:43,730 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:43,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:43,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:43,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:43,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:45,041 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:45,041 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [779298981] [2022-02-15 01:12:45,042 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [779298981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:45,042 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:45,042 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-02-15 01:12:45,042 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20935079] [2022-02-15 01:12:45,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:45,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-02-15 01:12:45,042 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:45,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-02-15 01:12:45,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=183, Invalid=3977, Unknown=0, NotChecked=0, Total=4160 [2022-02-15 01:12:45,043 INFO L87 Difference]: Start difference. First operand 85 states and 86 transitions. Second operand has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:47,169 INFO L93 Difference]: Finished difference Result 97 states and 101 transitions. [2022-02-15 01:12:47,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-02-15 01:12:47,170 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-02-15 01:12:47,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:47,170 INFO L225 Difference]: With dead ends: 97 [2022-02-15 01:12:47,170 INFO L226 Difference]: Without dead ends: 89 [2022-02-15 01:12:47,172 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4821 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=494, Invalid=14512, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:12:47,172 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 94 mSDsluCounter, 257 mSDsCounter, 0 mSdLazyCounter, 4118 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 94 SdHoareTripleChecker+Valid, 267 SdHoareTripleChecker+Invalid, 4156 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 4118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:47,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [94 Valid, 267 Invalid, 4156 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 4118 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:12:47,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-15 01:12:47,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2022-02-15 01:12:47,179 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) [2022-02-15 01:12:47,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 89 transitions. [2022-02-15 01:12:47,180 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 89 transitions. Word has length 83 [2022-02-15 01:12:47,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:47,180 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 89 transitions. [2022-02-15 01:12:47,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 1.253968253968254) internal successors, (79), 62 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:47,180 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 89 transitions. [2022-02-15 01:12:47,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-02-15 01:12:47,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:47,181 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 16, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:47,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:12:47,181 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:47,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:47,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1427519991, now seen corresponding path program 24 times [2022-02-15 01:12:47,181 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:47,181 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1106105735] [2022-02-15 01:12:47,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:47,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:47,253 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:47,254 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:47,292 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:47,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:47,343 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:47,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:47,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:47,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:47,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:47,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:48,589 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:48,590 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1106105735] [2022-02-15 01:12:48,590 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1106105735] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:48,590 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:48,590 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-02-15 01:12:48,590 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737576057] [2022-02-15 01:12:48,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:48,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-02-15 01:12:48,590 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:48,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-02-15 01:12:48,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=4234, Unknown=0, NotChecked=0, Total=4422 [2022-02-15 01:12:48,591 INFO L87 Difference]: Start difference. First operand 88 states and 89 transitions. Second operand has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:49,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:49,997 INFO L93 Difference]: Finished difference Result 100 states and 104 transitions. [2022-02-15 01:12:49,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-02-15 01:12:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 86 [2022-02-15 01:12:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:49,998 INFO L225 Difference]: With dead ends: 100 [2022-02-15 01:12:49,998 INFO L226 Difference]: Without dead ends: 92 [2022-02-15 01:12:50,000 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5172 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=509, Invalid=15493, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:12:50,000 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 98 mSDsluCounter, 242 mSDsCounter, 0 mSdLazyCounter, 4032 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 252 SdHoareTripleChecker+Invalid, 4071 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 4032 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:50,000 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 252 Invalid, 4071 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 4032 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:12:50,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2022-02-15 01:12:50,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2022-02-15 01:12:50,008 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) [2022-02-15 01:12:50,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 92 transitions. [2022-02-15 01:12:50,009 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 92 transitions. Word has length 86 [2022-02-15 01:12:50,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:50,009 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 92 transitions. [2022-02-15 01:12:50,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 1.2615384615384615) internal successors, (82), 64 states have internal predecessors, (82), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:50,009 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 92 transitions. [2022-02-15 01:12:50,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-15 01:12:50,009 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:50,009 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 17, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:50,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:12:50,009 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:50,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:50,010 INFO L85 PathProgramCache]: Analyzing trace with hash 547564590, now seen corresponding path program 25 times [2022-02-15 01:12:50,010 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:50,010 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [495304180] [2022-02-15 01:12:50,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:50,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:50,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:50,069 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:50,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:50,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:50,128 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:50,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:50,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:50,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:50,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:50,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:51,064 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:51,064 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [495304180] [2022-02-15 01:12:51,064 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [495304180] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:51,064 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:51,064 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-02-15 01:12:51,064 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391007880] [2022-02-15 01:12:51,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:51,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-02-15 01:12:51,065 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:51,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-02-15 01:12:51,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=193, Invalid=4499, Unknown=0, NotChecked=0, Total=4692 [2022-02-15 01:12:51,066 INFO L87 Difference]: Start difference. First operand 91 states and 92 transitions. Second operand has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 66 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:52,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:52,757 INFO L93 Difference]: Finished difference Result 103 states and 107 transitions. [2022-02-15 01:12:52,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-02-15 01:12:52,757 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 66 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 89 [2022-02-15 01:12:52,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:52,757 INFO L225 Difference]: With dead ends: 103 [2022-02-15 01:12:52,757 INFO L226 Difference]: Without dead ends: 95 [2022-02-15 01:12:52,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5533 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=524, Invalid=16506, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 01:12:52,759 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 101 mSDsluCounter, 227 mSDsCounter, 0 mSdLazyCounter, 3926 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 3966 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 3926 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:52,759 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 237 Invalid, 3966 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 3926 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:12:52,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2022-02-15 01:12:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 94. [2022-02-15 01:12:52,767 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) [2022-02-15 01:12:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 95 transitions. [2022-02-15 01:12:52,767 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 95 transitions. Word has length 89 [2022-02-15 01:12:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:52,767 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 95 transitions. [2022-02-15 01:12:52,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 67 states have (on average 1.2686567164179106) internal successors, (85), 66 states have internal predecessors, (85), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 95 transitions. [2022-02-15 01:12:52,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-02-15 01:12:52,768 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:52,768 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 18, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:52,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:12:52,768 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:52,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:52,768 INFO L85 PathProgramCache]: Analyzing trace with hash -759638039, now seen corresponding path program 26 times [2022-02-15 01:12:52,768 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:52,768 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [151455310] [2022-02-15 01:12:52,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:52,805 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:52,849 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:52,849 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:52,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:52,953 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:52,953 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:52,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:52,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:53,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:53,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:53,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:54,077 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:54,077 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [151455310] [2022-02-15 01:12:54,077 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [151455310] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:54,078 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:54,078 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-02-15 01:12:54,078 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128480633] [2022-02-15 01:12:54,078 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:54,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2022-02-15 01:12:54,078 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:54,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2022-02-15 01:12:54,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=4772, Unknown=0, NotChecked=0, Total=4970 [2022-02-15 01:12:54,079 INFO L87 Difference]: Start difference. First operand 94 states and 95 transitions. Second operand has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 68 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:55,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:55,830 INFO L93 Difference]: Finished difference Result 106 states and 110 transitions. [2022-02-15 01:12:55,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-02-15 01:12:55,830 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 68 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 92 [2022-02-15 01:12:55,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:55,831 INFO L225 Difference]: With dead ends: 106 [2022-02-15 01:12:55,831 INFO L226 Difference]: Without dead ends: 98 [2022-02-15 01:12:55,832 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5906 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=539, Invalid=17551, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:12:55,833 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 106 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 4412 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 4453 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 4412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:55,833 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 257 Invalid, 4453 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 4412 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:12:55,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2022-02-15 01:12:55,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2022-02-15 01:12:55,840 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) [2022-02-15 01:12:55,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 98 transitions. [2022-02-15 01:12:55,841 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 98 transitions. Word has length 92 [2022-02-15 01:12:55,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:55,841 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 98 transitions. [2022-02-15 01:12:55,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 69 states have (on average 1.2753623188405796) internal successors, (88), 68 states have internal predecessors, (88), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:12:55,841 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 98 transitions. [2022-02-15 01:12:55,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-02-15 01:12:55,841 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:55,841 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 19, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:55,841 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:12:55,842 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:55,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:55,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1164685746, now seen corresponding path program 27 times [2022-02-15 01:12:55,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:55,842 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [686751268] [2022-02-15 01:12:55,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:55,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:55,928 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:55,928 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:55,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:56,011 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:56,011 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:56,011 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:56,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:56,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:56,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:56,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:12:57,288 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:12:57,288 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [686751268] [2022-02-15 01:12:57,288 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [686751268] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:12:57,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:12:57,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-02-15 01:12:57,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281236411] [2022-02-15 01:12:57,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:12:57,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-02-15 01:12:57,289 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:12:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-02-15 01:12:57,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=203, Invalid=5053, Unknown=0, NotChecked=0, Total=5256 [2022-02-15 01:12:57,290 INFO L87 Difference]: Start difference. First operand 97 states and 98 transitions. Second operand has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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) [2022-02-15 01:12:58,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:12:58,928 INFO L93 Difference]: Finished difference Result 109 states and 113 transitions. [2022-02-15 01:12:58,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-02-15 01:12:58,928 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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 [2022-02-15 01:12:58,928 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:12:58,929 INFO L225 Difference]: With dead ends: 109 [2022-02-15 01:12:58,929 INFO L226 Difference]: Without dead ends: 101 [2022-02-15 01:12:58,931 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6285 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=554, Invalid=18628, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 01:12:58,931 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 110 mSDsluCounter, 272 mSDsCounter, 0 mSdLazyCounter, 5016 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 5058 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 5016 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:12:58,932 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 282 Invalid, 5058 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 5016 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:12:58,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2022-02-15 01:12:58,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 100. [2022-02-15 01:12:58,940 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) [2022-02-15 01:12:58,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 101 transitions. [2022-02-15 01:12:58,940 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 101 transitions. Word has length 95 [2022-02-15 01:12:58,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:12:58,940 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 101 transitions. [2022-02-15 01:12:58,941 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 71 states have (on average 1.2816901408450705) internal successors, (91), 70 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) [2022-02-15 01:12:58,941 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 101 transitions. [2022-02-15 01:12:58,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-02-15 01:12:58,941 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:12:58,941 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 20, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:12:58,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:12:58,941 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:12:58,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:12:58,941 INFO L85 PathProgramCache]: Analyzing trace with hash 917176777, now seen corresponding path program 28 times [2022-02-15 01:12:58,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:12:58,942 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1493300657] [2022-02-15 01:12:58,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:12:58,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:59,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:59,010 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:59,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:59,069 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:12:59,069 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:12:59,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:12:59,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:59,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:12:59,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:12:59,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:00,259 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:00,259 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1493300657] [2022-02-15 01:13:00,259 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1493300657] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:00,259 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:00,259 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-02-15 01:13:00,259 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756258124] [2022-02-15 01:13:00,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:00,259 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-02-15 01:13:00,260 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:00,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-02-15 01:13:00,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=5342, Unknown=0, NotChecked=0, Total=5550 [2022-02-15 01:13:00,265 INFO L87 Difference]: Start difference. First operand 100 states and 101 transitions. Second operand has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 72 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) [2022-02-15 01:13:02,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:02,159 INFO L93 Difference]: Finished difference Result 112 states and 116 transitions. [2022-02-15 01:13:02,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-02-15 01:13:02,159 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 72 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 [2022-02-15 01:13:02,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:02,160 INFO L225 Difference]: With dead ends: 112 [2022-02-15 01:13:02,160 INFO L226 Difference]: Without dead ends: 104 [2022-02-15 01:13:02,161 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6678 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=569, Invalid=19737, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 01:13:02,161 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 114 mSDsluCounter, 287 mSDsCounter, 0 mSdLazyCounter, 5460 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 5503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 5460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:02,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 297 Invalid, 5503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 5460 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:13:02,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-15 01:13:02,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2022-02-15 01:13:02,170 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) [2022-02-15 01:13:02,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 104 transitions. [2022-02-15 01:13:02,170 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 104 transitions. Word has length 98 [2022-02-15 01:13:02,170 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:02,171 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 104 transitions. [2022-02-15 01:13:02,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 73 states have (on average 1.2876712328767124) internal successors, (94), 72 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) [2022-02-15 01:13:02,171 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 104 transitions. [2022-02-15 01:13:02,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-15 01:13:02,171 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:02,171 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 21, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:02,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:13:02,171 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:02,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:02,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1939122066, now seen corresponding path program 29 times [2022-02-15 01:13:02,172 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:02,172 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [284418712] [2022-02-15 01:13:02,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:02,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:02,251 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:02,252 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:02,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:02,316 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:02,316 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:02,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:02,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:02,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:03,446 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:03,446 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [284418712] [2022-02-15 01:13:03,446 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [284418712] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:03,446 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:03,446 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-02-15 01:13:03,446 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268518288] [2022-02-15 01:13:03,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:03,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-02-15 01:13:03,447 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:03,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-02-15 01:13:03,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=213, Invalid=5639, Unknown=0, NotChecked=0, Total=5852 [2022-02-15 01:13:03,448 INFO L87 Difference]: Start difference. First operand 103 states and 104 transitions. Second operand has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 74 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) [2022-02-15 01:13:05,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:05,984 INFO L93 Difference]: Finished difference Result 115 states and 119 transitions. [2022-02-15 01:13:05,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-02-15 01:13:05,986 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 74 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 [2022-02-15 01:13:05,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:05,987 INFO L225 Difference]: With dead ends: 115 [2022-02-15 01:13:05,987 INFO L226 Difference]: Without dead ends: 107 [2022-02-15 01:13:05,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7077 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=584, Invalid=20878, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:13:05,989 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 118 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 5251 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 5295 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 5251 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:05,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 277 Invalid, 5295 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 5251 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:13:05,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2022-02-15 01:13:06,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 106. [2022-02-15 01:13:06,018 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) [2022-02-15 01:13:06,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 107 transitions. [2022-02-15 01:13:06,018 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 107 transitions. Word has length 101 [2022-02-15 01:13:06,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:06,018 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 107 transitions. [2022-02-15 01:13:06,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 75 states have (on average 1.2933333333333332) internal successors, (97), 74 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) [2022-02-15 01:13:06,019 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 107 transitions. [2022-02-15 01:13:06,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-02-15 01:13:06,019 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:06,019 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 22, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:06,019 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:13:06,019 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:06,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:06,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2045885527, now seen corresponding path program 30 times [2022-02-15 01:13:06,020 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:06,020 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [908252916] [2022-02-15 01:13:06,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:06,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:06,113 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:06,113 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:06,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:06,207 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:06,208 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:06,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:06,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:06,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:06,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:06,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:07,573 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:07,573 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [908252916] [2022-02-15 01:13:07,573 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [908252916] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:07,573 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:07,573 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-02-15 01:13:07,573 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449730159] [2022-02-15 01:13:07,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:07,574 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-02-15 01:13:07,574 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:07,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-02-15 01:13:07,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5944, Unknown=0, NotChecked=0, Total=6162 [2022-02-15 01:13:07,575 INFO L87 Difference]: Start difference. First operand 106 states and 107 transitions. Second operand has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 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) [2022-02-15 01:13:09,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:09,821 INFO L93 Difference]: Finished difference Result 118 states and 122 transitions. [2022-02-15 01:13:09,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-02-15 01:13:09,821 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 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 [2022-02-15 01:13:09,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:09,822 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:13:09,822 INFO L226 Difference]: Without dead ends: 110 [2022-02-15 01:13:09,824 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7488 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=599, Invalid=22051, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 01:13:09,824 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 122 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 6209 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 6254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 6209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:09,824 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 317 Invalid, 6254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 6209 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:13:09,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2022-02-15 01:13:09,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2022-02-15 01:13:09,833 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) [2022-02-15 01:13:09,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 110 transitions. [2022-02-15 01:13:09,834 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 110 transitions. Word has length 104 [2022-02-15 01:13:09,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:09,834 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 110 transitions. [2022-02-15 01:13:09,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 77 states have (on average 1.2987012987012987) internal successors, (100), 76 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) [2022-02-15 01:13:09,834 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 110 transitions. [2022-02-15 01:13:09,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-02-15 01:13:09,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:09,835 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 23, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:09,835 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:13:09,835 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:09,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:09,835 INFO L85 PathProgramCache]: Analyzing trace with hash -65385842, now seen corresponding path program 31 times [2022-02-15 01:13:09,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:09,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [147173057] [2022-02-15 01:13:09,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:09,879 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:09,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:09,903 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:09,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:09,947 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:09,947 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:09,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:09,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:10,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:10,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:11,486 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:11,486 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [147173057] [2022-02-15 01:13:11,486 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [147173057] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:11,486 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:11,486 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-02-15 01:13:11,486 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592860944] [2022-02-15 01:13:11,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:11,487 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-02-15 01:13:11,487 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:11,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-02-15 01:13:11,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=6257, Unknown=0, NotChecked=0, Total=6480 [2022-02-15 01:13:11,488 INFO L87 Difference]: Start difference. First operand 109 states and 110 transitions. Second operand has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 78 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) [2022-02-15 01:13:13,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:13,472 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2022-02-15 01:13:13,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-02-15 01:13:13,473 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 78 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 [2022-02-15 01:13:13,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:13,473 INFO L225 Difference]: With dead ends: 121 [2022-02-15 01:13:13,473 INFO L226 Difference]: Without dead ends: 113 [2022-02-15 01:13:13,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 27 SyntacticMatches, 3 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7911 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=614, Invalid=23256, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 01:13:13,475 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 125 mSDsluCounter, 307 mSDsCounter, 0 mSdLazyCounter, 6392 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 317 SdHoareTripleChecker+Invalid, 6438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 6392 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:13,475 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 317 Invalid, 6438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 6392 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:13:13,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-02-15 01:13:13,489 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 112. [2022-02-15 01:13:13,489 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) [2022-02-15 01:13:13,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 113 transitions. [2022-02-15 01:13:13,490 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 113 transitions. Word has length 107 [2022-02-15 01:13:13,490 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:13,490 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 113 transitions. [2022-02-15 01:13:13,490 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 78 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) [2022-02-15 01:13:13,490 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 113 transitions. [2022-02-15 01:13:13,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-02-15 01:13:13,490 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:13,491 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 24, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:13,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:13:13,491 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:13,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:13,491 INFO L85 PathProgramCache]: Analyzing trace with hash 1034984841, now seen corresponding path program 32 times [2022-02-15 01:13:13,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:13,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [189128703] [2022-02-15 01:13:13,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:13,530 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:13,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:13,557 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:13,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:13,608 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:13,608 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:13,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:13,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:13,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:13,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:13,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:15,633 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:15,633 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [189128703] [2022-02-15 01:13:15,633 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [189128703] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:15,633 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:15,633 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-02-15 01:13:15,633 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4709216] [2022-02-15 01:13:15,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:15,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-02-15 01:13:15,633 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:15,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-02-15 01:13:15,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=228, Invalid=6578, Unknown=0, NotChecked=0, Total=6806 [2022-02-15 01:13:15,634 INFO L87 Difference]: Start difference. First operand 112 states and 113 transitions. Second operand has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 80 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) [2022-02-15 01:13:17,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:17,725 INFO L93 Difference]: Finished difference Result 124 states and 128 transitions. [2022-02-15 01:13:17,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-02-15 01:13:17,725 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 80 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 [2022-02-15 01:13:17,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:17,726 INFO L225 Difference]: With dead ends: 124 [2022-02-15 01:13:17,726 INFO L226 Difference]: Without dead ends: 116 [2022-02-15 01:13:17,728 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 28 SyntacticMatches, 3 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8342 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=629, Invalid=24493, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:13:17,728 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 130 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 6790 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 6837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 6790 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:17,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 327 Invalid, 6837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 6790 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-02-15 01:13:17,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2022-02-15 01:13:17,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2022-02-15 01:13:17,738 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) [2022-02-15 01:13:17,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 116 transitions. [2022-02-15 01:13:17,739 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 116 transitions. Word has length 110 [2022-02-15 01:13:17,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:17,739 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 116 transitions. [2022-02-15 01:13:17,739 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 1.308641975308642) internal successors, (106), 80 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) [2022-02-15 01:13:17,739 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 116 transitions. [2022-02-15 01:13:17,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2022-02-15 01:13:17,739 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:17,740 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 25, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:17,740 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:13:17,740 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:17,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:17,740 INFO L85 PathProgramCache]: Analyzing trace with hash -1307368274, now seen corresponding path program 33 times [2022-02-15 01:13:17,740 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:17,740 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1898344479] [2022-02-15 01:13:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:17,776 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:17,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:17,801 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:17,841 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:17,900 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:17,901 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:17,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:17,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:17,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:17,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:17,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:19,598 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:19,598 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1898344479] [2022-02-15 01:13:19,598 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1898344479] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:19,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:19,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-02-15 01:13:19,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [260086244] [2022-02-15 01:13:19,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:19,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-02-15 01:13:19,599 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:19,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-02-15 01:13:19,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=6907, Unknown=0, NotChecked=0, Total=7140 [2022-02-15 01:13:19,600 INFO L87 Difference]: Start difference. First operand 115 states and 116 transitions. Second operand has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:22,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:22,075 INFO L93 Difference]: Finished difference Result 127 states and 131 transitions. [2022-02-15 01:13:22,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-02-15 01:13:22,075 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 113 [2022-02-15 01:13:22,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:22,076 INFO L225 Difference]: With dead ends: 127 [2022-02-15 01:13:22,076 INFO L226 Difference]: Without dead ends: 119 [2022-02-15 01:13:22,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 161 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8781 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=644, Invalid=25762, Unknown=0, NotChecked=0, Total=26406 [2022-02-15 01:13:22,077 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 133 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 6982 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 7030 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 6982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:22,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 327 Invalid, 7030 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 6982 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:13:22,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-15 01:13:22,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 118. [2022-02-15 01:13:22,088 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) [2022-02-15 01:13:22,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 119 transitions. [2022-02-15 01:13:22,089 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 119 transitions. Word has length 113 [2022-02-15 01:13:22,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:22,089 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 119 transitions. [2022-02-15 01:13:22,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 83 states have (on average 1.3132530120481927) internal successors, (109), 82 states have internal predecessors, (109), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:22,089 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 119 transitions. [2022-02-15 01:13:22,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-02-15 01:13:22,090 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:22,090 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 26, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:22,090 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:13:22,090 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:22,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:22,090 INFO L85 PathProgramCache]: Analyzing trace with hash -2015359127, now seen corresponding path program 34 times [2022-02-15 01:13:22,090 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:22,090 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [674633553] [2022-02-15 01:13:22,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:22,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:22,146 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:22,146 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:22,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:22,229 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:22,229 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:22,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:22,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:22,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:22,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:22,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:24,203 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:24,203 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [674633553] [2022-02-15 01:13:24,203 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [674633553] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:24,203 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:24,203 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-02-15 01:13:24,203 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549678808] [2022-02-15 01:13:24,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:24,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-02-15 01:13:24,204 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:24,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-02-15 01:13:24,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=7244, Unknown=0, NotChecked=0, Total=7482 [2022-02-15 01:13:24,205 INFO L87 Difference]: Start difference. First operand 118 states and 119 transitions. Second operand has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 84 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) [2022-02-15 01:13:26,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:26,864 INFO L93 Difference]: Finished difference Result 130 states and 134 transitions. [2022-02-15 01:13:26,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-02-15 01:13:26,864 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 84 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 [2022-02-15 01:13:26,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:26,865 INFO L225 Difference]: With dead ends: 130 [2022-02-15 01:13:26,865 INFO L226 Difference]: Without dead ends: 122 [2022-02-15 01:13:26,867 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 165 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9232 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=659, Invalid=27063, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 01:13:26,867 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 137 mSDsluCounter, 327 mSDsCounter, 0 mSdLazyCounter, 7397 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 337 SdHoareTripleChecker+Invalid, 7446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 7397 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:26,867 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 337 Invalid, 7446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 7397 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-02-15 01:13:26,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2022-02-15 01:13:26,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2022-02-15 01:13:26,879 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) [2022-02-15 01:13:26,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 122 transitions. [2022-02-15 01:13:26,879 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 122 transitions. Word has length 116 [2022-02-15 01:13:26,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:26,879 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 122 transitions. [2022-02-15 01:13:26,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 85 states have (on average 1.3176470588235294) internal successors, (112), 84 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) [2022-02-15 01:13:26,879 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 122 transitions. [2022-02-15 01:13:26,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-02-15 01:13:26,880 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:26,880 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 27, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:26,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:13:26,880 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:26,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:26,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1186470194, now seen corresponding path program 35 times [2022-02-15 01:13:26,880 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:26,880 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [283497795] [2022-02-15 01:13:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:26,920 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:26,950 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:26,951 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:26,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:27,028 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:27,028 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:27,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:27,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:27,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:28,541 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:28,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [283497795] [2022-02-15 01:13:28,542 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [283497795] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:28,542 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:28,542 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-02-15 01:13:28,542 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814855865] [2022-02-15 01:13:28,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:28,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-02-15 01:13:28,542 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-02-15 01:13:28,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=7589, Unknown=0, NotChecked=0, Total=7832 [2022-02-15 01:13:28,544 INFO L87 Difference]: Start difference. First operand 121 states and 122 transitions. Second operand has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 86 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:31,116 INFO L93 Difference]: Finished difference Result 133 states and 137 transitions. [2022-02-15 01:13:31,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-02-15 01:13:31,116 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 86 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-02-15 01:13:31,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:31,117 INFO L225 Difference]: With dead ends: 133 [2022-02-15 01:13:31,117 INFO L226 Difference]: Without dead ends: 125 [2022-02-15 01:13:31,118 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9693 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=674, Invalid=28396, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 01:13:31,119 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 141 mSDsluCounter, 342 mSDsCounter, 0 mSdLazyCounter, 7936 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 352 SdHoareTripleChecker+Invalid, 7986 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 7936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:31,119 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 352 Invalid, 7986 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 7936 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:13:31,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2022-02-15 01:13:31,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2022-02-15 01:13:31,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 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) [2022-02-15 01:13:31,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 125 transitions. [2022-02-15 01:13:31,131 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 125 transitions. Word has length 119 [2022-02-15 01:13:31,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:31,131 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 125 transitions. [2022-02-15 01:13:31,131 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 1.3218390804597702) internal successors, (115), 86 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:31,131 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 125 transitions. [2022-02-15 01:13:31,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-02-15 01:13:31,131 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:31,131 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 28, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:31,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:13:31,131 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:31,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:31,132 INFO L85 PathProgramCache]: Analyzing trace with hash 476748105, now seen corresponding path program 36 times [2022-02-15 01:13:31,132 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:31,132 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [277123174] [2022-02-15 01:13:31,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:31,166 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:31,192 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:31,192 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:31,211 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:31,238 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:31,239 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:31,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:31,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:31,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:31,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:33,375 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:33,375 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [277123174] [2022-02-15 01:13:33,375 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [277123174] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:33,375 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:33,375 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-02-15 01:13:33,375 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278648602] [2022-02-15 01:13:33,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:33,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-02-15 01:13:33,376 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:33,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-02-15 01:13:33,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=7942, Unknown=0, NotChecked=0, Total=8190 [2022-02-15 01:13:33,377 INFO L87 Difference]: Start difference. First operand 124 states and 125 transitions. Second operand has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:36,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:36,559 INFO L93 Difference]: Finished difference Result 136 states and 140 transitions. [2022-02-15 01:13:36,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-02-15 01:13:36,559 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 122 [2022-02-15 01:13:36,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:36,560 INFO L225 Difference]: With dead ends: 136 [2022-02-15 01:13:36,560 INFO L226 Difference]: Without dead ends: 128 [2022-02-15 01:13:36,561 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 32 SyntacticMatches, 3 SemanticMatches, 173 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10166 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=689, Invalid=29761, Unknown=0, NotChecked=0, Total=30450 [2022-02-15 01:13:36,561 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 145 mSDsluCounter, 347 mSDsCounter, 0 mSdLazyCounter, 8265 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 357 SdHoareTripleChecker+Invalid, 8316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 8265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:36,562 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 357 Invalid, 8316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 8265 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:13:36,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2022-02-15 01:13:36,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2022-02-15 01:13:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 122 states have (on average 1.0163934426229508) internal successors, (124), 122 states have internal predecessors, (124), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:36,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 128 transitions. [2022-02-15 01:13:36,575 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 128 transitions. Word has length 122 [2022-02-15 01:13:36,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:36,575 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 128 transitions. [2022-02-15 01:13:36,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 89 states have (on average 1.3258426966292134) internal successors, (118), 88 states have internal predecessors, (118), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:36,576 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 128 transitions. [2022-02-15 01:13:36,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2022-02-15 01:13:36,577 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:36,577 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 29, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:36,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:13:36,577 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:36,577 INFO L85 PathProgramCache]: Analyzing trace with hash -1624600338, now seen corresponding path program 37 times [2022-02-15 01:13:36,577 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:36,577 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [623359557] [2022-02-15 01:13:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:36,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:36,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:36,626 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:36,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:36,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:36,726 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:36,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:36,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:36,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:36,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:36,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:38,410 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:38,410 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [623359557] [2022-02-15 01:13:38,410 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [623359557] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:38,410 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:38,410 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-02-15 01:13:38,410 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755009884] [2022-02-15 01:13:38,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:38,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-02-15 01:13:38,410 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:38,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-02-15 01:13:38,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=8303, Unknown=0, NotChecked=0, Total=8556 [2022-02-15 01:13:38,412 INFO L87 Difference]: Start difference. First operand 127 states and 128 transitions. Second operand has 92 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 90 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:41,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:41,524 INFO L93 Difference]: Finished difference Result 139 states and 143 transitions. [2022-02-15 01:13:41,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-02-15 01:13:41,524 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 90 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 125 [2022-02-15 01:13:41,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:41,525 INFO L225 Difference]: With dead ends: 139 [2022-02-15 01:13:41,525 INFO L226 Difference]: Without dead ends: 131 [2022-02-15 01:13:41,527 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 33 SyntacticMatches, 3 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10647 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=704, Invalid=31158, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 01:13:41,527 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 149 mSDsluCounter, 357 mSDsCounter, 0 mSdLazyCounter, 8715 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 367 SdHoareTripleChecker+Invalid, 8767 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 8715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:41,527 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 367 Invalid, 8767 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 8715 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-02-15 01:13:41,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-02-15 01:13:41,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 130. [2022-02-15 01:13:41,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 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) [2022-02-15 01:13:41,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 131 transitions. [2022-02-15 01:13:41,541 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 131 transitions. Word has length 125 [2022-02-15 01:13:41,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:41,542 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 131 transitions. [2022-02-15 01:13:41,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 91 states have (on average 1.3296703296703296) internal successors, (121), 90 states have internal predecessors, (121), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:41,542 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 131 transitions. [2022-02-15 01:13:41,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-02-15 01:13:41,542 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:41,542 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 30, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:41,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:13:41,543 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:41,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:41,543 INFO L85 PathProgramCache]: Analyzing trace with hash 547240745, now seen corresponding path program 38 times [2022-02-15 01:13:41,543 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:41,543 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1928062888] [2022-02-15 01:13:41,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:41,580 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:41,611 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:41,611 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:41,642 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:41,696 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:41,696 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:41,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:41,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:41,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:41,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:41,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:44,303 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:44,303 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1928062888] [2022-02-15 01:13:44,303 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1928062888] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:44,303 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:44,303 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [94] imperfect sequences [] total 94 [2022-02-15 01:13:44,303 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [49272193] [2022-02-15 01:13:44,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:44,303 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-02-15 01:13:44,303 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:44,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-02-15 01:13:44,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=8672, Unknown=0, NotChecked=0, Total=8930 [2022-02-15 01:13:44,305 INFO L87 Difference]: Start difference. First operand 130 states and 131 transitions. Second operand has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 92 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:47,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:47,405 INFO L93 Difference]: Finished difference Result 142 states and 146 transitions. [2022-02-15 01:13:47,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-02-15 01:13:47,405 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 92 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 128 [2022-02-15 01:13:47,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:47,406 INFO L225 Difference]: With dead ends: 142 [2022-02-15 01:13:47,406 INFO L226 Difference]: Without dead ends: 134 [2022-02-15 01:13:47,407 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 35 SyntacticMatches, 2 SemanticMatches, 181 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11136 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=719, Invalid=32587, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 01:13:47,408 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 153 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 9055 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 153 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 9108 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 9055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:47,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [153 Valid, 372 Invalid, 9108 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 9055 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:13:47,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-15 01:13:47,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2022-02-15 01:13:47,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 128 states have (on average 1.015625) internal successors, (130), 128 states have internal predecessors, (130), 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) [2022-02-15 01:13:47,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 134 transitions. [2022-02-15 01:13:47,422 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 134 transitions. Word has length 128 [2022-02-15 01:13:47,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:47,422 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 134 transitions. [2022-02-15 01:13:47,422 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 93 states have (on average 1.3333333333333333) internal successors, (124), 92 states have internal predecessors, (124), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:47,422 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 134 transitions. [2022-02-15 01:13:47,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-02-15 01:13:47,422 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:47,422 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 31, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:47,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:13:47,423 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:47,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:47,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1817369842, now seen corresponding path program 39 times [2022-02-15 01:13:47,423 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:47,423 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920307800] [2022-02-15 01:13:47,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:47,478 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:47,517 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:47,517 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:47,556 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:47,594 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:47,595 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:47,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:47,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:47,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:47,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:47,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:49,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:49,428 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920307800] [2022-02-15 01:13:49,428 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [920307800] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:49,428 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:49,428 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [96] imperfect sequences [] total 96 [2022-02-15 01:13:49,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853594281] [2022-02-15 01:13:49,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-02-15 01:13:49,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:49,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-02-15 01:13:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=9049, Unknown=0, NotChecked=0, Total=9312 [2022-02-15 01:13:49,430 INFO L87 Difference]: Start difference. First operand 133 states and 134 transitions. Second operand has 96 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 94 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:52,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:52,919 INFO L93 Difference]: Finished difference Result 145 states and 149 transitions. [2022-02-15 01:13:52,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-02-15 01:13:52,920 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 94 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-02-15 01:13:52,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:52,920 INFO L225 Difference]: With dead ends: 145 [2022-02-15 01:13:52,920 INFO L226 Difference]: Without dead ends: 137 [2022-02-15 01:13:52,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 223 GetRequests, 35 SyntacticMatches, 3 SemanticMatches, 185 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11639 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=734, Invalid=34048, Unknown=0, NotChecked=0, Total=34782 [2022-02-15 01:13:52,923 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 157 mSDsluCounter, 382 mSDsCounter, 0 mSdLazyCounter, 9779 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 392 SdHoareTripleChecker+Invalid, 9833 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 9779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:52,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 392 Invalid, 9833 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 9779 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:13:52,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-02-15 01:13:52,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2022-02-15 01:13:52,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 states have internal predecessors, (133), 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) [2022-02-15 01:13:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 137 transitions. [2022-02-15 01:13:52,937 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 137 transitions. Word has length 131 [2022-02-15 01:13:52,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:52,938 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 137 transitions. [2022-02-15 01:13:52,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 95 states have (on average 1.3368421052631578) internal successors, (127), 94 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:52,938 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 137 transitions. [2022-02-15 01:13:52,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-02-15 01:13:52,938 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:52,938 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 32, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:52,938 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:13:52,938 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:52,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:52,939 INFO L85 PathProgramCache]: Analyzing trace with hash 122221833, now seen corresponding path program 40 times [2022-02-15 01:13:52,939 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:52,939 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2035654787] [2022-02-15 01:13:52,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:52,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:52,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:52,986 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:53,016 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:53,050 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:53,050 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:53,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:53,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:53,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:53,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:53,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:13:55,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:13:55,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2035654787] [2022-02-15 01:13:55,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2035654787] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:13:55,096 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:13:55,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [98] imperfect sequences [] total 98 [2022-02-15 01:13:55,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1964821000] [2022-02-15 01:13:55,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:13:55,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2022-02-15 01:13:55,097 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:13:55,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2022-02-15 01:13:55,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=268, Invalid=9434, Unknown=0, NotChecked=0, Total=9702 [2022-02-15 01:13:55,098 INFO L87 Difference]: Start difference. First operand 136 states and 137 transitions. Second operand has 98 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:13:59,142 INFO L93 Difference]: Finished difference Result 148 states and 152 transitions. [2022-02-15 01:13:59,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2022-02-15 01:13:59,143 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 134 [2022-02-15 01:13:59,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:13:59,144 INFO L225 Difference]: With dead ends: 148 [2022-02-15 01:13:59,144 INFO L226 Difference]: Without dead ends: 140 [2022-02-15 01:13:59,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 37 SyntacticMatches, 2 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12148 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=749, Invalid=35541, Unknown=0, NotChecked=0, Total=36290 [2022-02-15 01:13:59,152 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 161 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 9752 mSolverCounterSat, 55 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 161 SdHoareTripleChecker+Valid, 382 SdHoareTripleChecker+Invalid, 9807 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 55 IncrementalHoareTripleChecker+Valid, 9752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:13:59,152 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [161 Valid, 382 Invalid, 9807 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [55 Valid, 9752 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 01:13:59,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2022-02-15 01:13:59,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2022-02-15 01:13:59,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 134 states have (on average 1.0149253731343284) internal successors, (136), 134 states have internal predecessors, (136), 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) [2022-02-15 01:13:59,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 140 transitions. [2022-02-15 01:13:59,168 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 140 transitions. Word has length 134 [2022-02-15 01:13:59,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:13:59,169 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 140 transitions. [2022-02-15 01:13:59,170 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 1.3402061855670102) internal successors, (130), 96 states have internal predecessors, (130), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:13:59,170 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 140 transitions. [2022-02-15 01:13:59,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2022-02-15 01:13:59,170 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:13:59,170 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 33, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:13:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:13:59,170 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:13:59,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:13:59,171 INFO L85 PathProgramCache]: Analyzing trace with hash -1992188626, now seen corresponding path program 41 times [2022-02-15 01:13:59,171 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:13:59,171 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2071642324] [2022-02-15 01:13:59,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:13:59,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:59,223 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:59,223 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:59,242 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:59,287 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:13:59,287 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:13:59,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:13:59,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:59,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:13:59,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:13:59,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:01,349 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:01,350 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2071642324] [2022-02-15 01:14:01,350 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2071642324] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:01,350 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:01,350 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [100] imperfect sequences [] total 100 [2022-02-15 01:14:01,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263430556] [2022-02-15 01:14:01,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:01,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2022-02-15 01:14:01,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:01,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2022-02-15 01:14:01,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=273, Invalid=9827, Unknown=0, NotChecked=0, Total=10100 [2022-02-15 01:14:01,351 INFO L87 Difference]: Start difference. First operand 139 states and 140 transitions. Second operand has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 98 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:05,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:05,301 INFO L93 Difference]: Finished difference Result 151 states and 155 transitions. [2022-02-15 01:14:05,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2022-02-15 01:14:05,301 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 98 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 137 [2022-02-15 01:14:05,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:05,302 INFO L225 Difference]: With dead ends: 151 [2022-02-15 01:14:05,302 INFO L226 Difference]: Without dead ends: 143 [2022-02-15 01:14:05,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 193 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12669 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=764, Invalid=37066, Unknown=0, NotChecked=0, Total=37830 [2022-02-15 01:14:05,305 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 166 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 10509 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 402 SdHoareTripleChecker+Invalid, 10565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 10509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:05,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 402 Invalid, 10565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 10509 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:14:05,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-15 01:14:05,320 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 142. [2022-02-15 01:14:05,320 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:05,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 143 transitions. [2022-02-15 01:14:05,321 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 143 transitions. Word has length 137 [2022-02-15 01:14:05,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:05,321 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 143 transitions. [2022-02-15 01:14:05,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 99 states have (on average 1.3434343434343434) internal successors, (133), 98 states have internal predecessors, (133), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:05,321 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 143 transitions. [2022-02-15 01:14:05,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-02-15 01:14:05,321 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:05,321 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 34, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:05,322 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:14:05,322 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:05,322 INFO L85 PathProgramCache]: Analyzing trace with hash 1891157737, now seen corresponding path program 42 times [2022-02-15 01:14:05,322 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:05,322 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [406077029] [2022-02-15 01:14:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:05,386 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:05,426 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:05,426 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:05,461 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:05,516 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:05,517 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:05,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:05,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:05,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:05,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:05,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:07,740 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:07,740 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [406077029] [2022-02-15 01:14:07,741 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [406077029] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:07,741 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:07,741 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [102] imperfect sequences [] total 102 [2022-02-15 01:14:07,741 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590769214] [2022-02-15 01:14:07,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:07,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2022-02-15 01:14:07,741 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:07,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2022-02-15 01:14:07,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=10228, Unknown=0, NotChecked=0, Total=10506 [2022-02-15 01:14:07,742 INFO L87 Difference]: Start difference. First operand 142 states and 143 transitions. Second operand has 102 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:11,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:11,961 INFO L93 Difference]: Finished difference Result 154 states and 158 transitions. [2022-02-15 01:14:11,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2022-02-15 01:14:11,961 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 140 [2022-02-15 01:14:11,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:11,965 INFO L225 Difference]: With dead ends: 154 [2022-02-15 01:14:11,965 INFO L226 Difference]: Without dead ends: 146 [2022-02-15 01:14:11,966 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 39 SyntacticMatches, 2 SemanticMatches, 197 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13200 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=779, Invalid=38623, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 01:14:11,967 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 170 mSDsluCounter, 362 mSDsCounter, 0 mSdLazyCounter, 9935 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 372 SdHoareTripleChecker+Invalid, 9992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 9935 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:11,967 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 372 Invalid, 9992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 9935 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 01:14:11,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2022-02-15 01:14:12,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2022-02-15 01:14:12,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 140 states have (on average 1.0142857142857142) internal successors, (142), 140 states have internal predecessors, (142), 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) [2022-02-15 01:14:12,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 146 transitions. [2022-02-15 01:14:12,012 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 146 transitions. Word has length 140 [2022-02-15 01:14:12,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:12,027 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 146 transitions. [2022-02-15 01:14:12,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 101 states have (on average 1.3465346534653466) internal successors, (136), 100 states have internal predecessors, (136), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:12,027 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 146 transitions. [2022-02-15 01:14:12,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-02-15 01:14:12,028 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:12,028 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 35, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:12,028 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-15 01:14:12,028 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:12,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:12,028 INFO L85 PathProgramCache]: Analyzing trace with hash 1423572814, now seen corresponding path program 43 times [2022-02-15 01:14:12,028 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:12,029 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1691286917] [2022-02-15 01:14:12,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:12,073 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:12,094 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:12,094 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:12,114 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:12,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:12,140 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:12,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:12,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:12,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:12,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:14,163 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:14,164 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1691286917] [2022-02-15 01:14:14,164 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1691286917] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:14,164 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:14,164 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [104] imperfect sequences [] total 104 [2022-02-15 01:14:14,164 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228776343] [2022-02-15 01:14:14,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:14,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2022-02-15 01:14:14,164 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:14,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2022-02-15 01:14:14,166 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=10637, Unknown=0, NotChecked=0, Total=10920 [2022-02-15 01:14:14,167 INFO L87 Difference]: Start difference. First operand 145 states and 146 transitions. Second operand has 104 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 102 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:17,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:17,920 INFO L93 Difference]: Finished difference Result 157 states and 161 transitions. [2022-02-15 01:14:17,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2022-02-15 01:14:17,920 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 102 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-02-15 01:14:17,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:17,921 INFO L225 Difference]: With dead ends: 157 [2022-02-15 01:14:17,921 INFO L226 Difference]: Without dead ends: 149 [2022-02-15 01:14:17,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 243 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 201 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13741 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=794, Invalid=40212, Unknown=0, NotChecked=0, Total=41006 [2022-02-15 01:14:17,923 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 173 mSDsluCounter, 377 mSDsCounter, 0 mSdLazyCounter, 10568 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 387 SdHoareTripleChecker+Invalid, 10626 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 10568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:17,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 387 Invalid, 10626 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 10568 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:14:17,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-15 01:14:17,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 148. [2022-02-15 01:14:17,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 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) [2022-02-15 01:14:17,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 149 transitions. [2022-02-15 01:14:17,939 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 149 transitions. Word has length 143 [2022-02-15 01:14:17,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:17,939 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 149 transitions. [2022-02-15 01:14:17,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 103 states have (on average 1.3495145631067962) internal successors, (139), 102 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:17,940 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 149 transitions. [2022-02-15 01:14:17,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-02-15 01:14:17,940 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:17,940 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 36, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:17,940 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-15 01:14:17,940 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:17,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:17,940 INFO L85 PathProgramCache]: Analyzing trace with hash 180072649, now seen corresponding path program 44 times [2022-02-15 01:14:17,941 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:17,941 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479678398] [2022-02-15 01:14:17,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:17,992 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:18,021 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:18,021 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:18,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:18,101 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:18,102 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:18,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:18,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:18,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:18,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:18,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:20,915 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:20,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479678398] [2022-02-15 01:14:20,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479678398] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:20,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:20,916 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [106] imperfect sequences [] total 106 [2022-02-15 01:14:20,916 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199043892] [2022-02-15 01:14:20,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:20,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2022-02-15 01:14:20,916 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:20,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2022-02-15 01:14:20,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=288, Invalid=11054, Unknown=0, NotChecked=0, Total=11342 [2022-02-15 01:14:20,918 INFO L87 Difference]: Start difference. First operand 148 states and 149 transitions. Second operand has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 104 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:24,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:24,519 INFO L93 Difference]: Finished difference Result 160 states and 164 transitions. [2022-02-15 01:14:24,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2022-02-15 01:14:24,519 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 104 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 146 [2022-02-15 01:14:24,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:24,520 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:14:24,520 INFO L226 Difference]: Without dead ends: 152 [2022-02-15 01:14:24,522 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 205 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14292 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=809, Invalid=41833, Unknown=0, NotChecked=0, Total=42642 [2022-02-15 01:14:24,523 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 178 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 12068 mSolverCounterSat, 59 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 12127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 59 IncrementalHoareTripleChecker+Valid, 12068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:24,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 432 Invalid, 12127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [59 Valid, 12068 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:14:24,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-02-15 01:14:24,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2022-02-15 01:14:24,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 146 states have (on average 1.0136986301369864) internal successors, (148), 146 states have internal predecessors, (148), 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) [2022-02-15 01:14:24,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 152 transitions. [2022-02-15 01:14:24,564 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 152 transitions. Word has length 146 [2022-02-15 01:14:24,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:24,565 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 152 transitions. [2022-02-15 01:14:24,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 105 states have (on average 1.3523809523809525) internal successors, (142), 104 states have internal predecessors, (142), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:24,565 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 152 transitions. [2022-02-15 01:14:24,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2022-02-15 01:14:24,565 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:24,565 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 37, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:24,565 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-15 01:14:24,566 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:24,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:24,566 INFO L85 PathProgramCache]: Analyzing trace with hash -840414866, now seen corresponding path program 45 times [2022-02-15 01:14:24,566 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:24,566 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [508886559] [2022-02-15 01:14:24,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:24,602 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:24,630 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:24,631 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:24,671 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:24,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:24,724 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:24,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:24,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:24,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:24,784 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:26,939 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:26,939 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [508886559] [2022-02-15 01:14:26,939 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [508886559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:26,939 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:26,939 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [108] imperfect sequences [] total 108 [2022-02-15 01:14:26,939 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714955114] [2022-02-15 01:14:26,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:26,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2022-02-15 01:14:26,953 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:26,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2022-02-15 01:14:26,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=293, Invalid=11479, Unknown=0, NotChecked=0, Total=11772 [2022-02-15 01:14:26,954 INFO L87 Difference]: Start difference. First operand 151 states and 152 transitions. Second operand has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 106 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:31,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:31,223 INFO L93 Difference]: Finished difference Result 163 states and 167 transitions. [2022-02-15 01:14:31,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2022-02-15 01:14:31,223 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 106 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 149 [2022-02-15 01:14:31,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:31,224 INFO L225 Difference]: With dead ends: 163 [2022-02-15 01:14:31,224 INFO L226 Difference]: Without dead ends: 155 [2022-02-15 01:14:31,225 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 209 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14853 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=824, Invalid=43486, Unknown=0, NotChecked=0, Total=44310 [2022-02-15 01:14:31,228 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 181 mSDsluCounter, 402 mSDsCounter, 0 mSdLazyCounter, 11746 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 412 SdHoareTripleChecker+Invalid, 11806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 11746 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:31,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [181 Valid, 412 Invalid, 11806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 11746 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:14:31,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-02-15 01:14:31,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 154. [2022-02-15 01:14:31,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 states have internal predecessors, (151), 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) [2022-02-15 01:14:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 155 transitions. [2022-02-15 01:14:31,257 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 155 transitions. Word has length 149 [2022-02-15 01:14:31,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:31,257 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 155 transitions. [2022-02-15 01:14:31,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 1.355140186915888) internal successors, (145), 106 states have internal predecessors, (145), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:31,258 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 155 transitions. [2022-02-15 01:14:31,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-02-15 01:14:31,258 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:31,258 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 38, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:31,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-15 01:14:31,258 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:31,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:31,259 INFO L85 PathProgramCache]: Analyzing trace with hash 1889514153, now seen corresponding path program 46 times [2022-02-15 01:14:31,259 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:31,259 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [505732445] [2022-02-15 01:14:31,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:31,293 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:31,318 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:31,318 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:31,343 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:31,388 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:31,388 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:31,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:31,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:31,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:31,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:31,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:34,379 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:34,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [505732445] [2022-02-15 01:14:34,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [505732445] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:34,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:34,380 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [110] imperfect sequences [] total 110 [2022-02-15 01:14:34,380 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675327511] [2022-02-15 01:14:34,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:34,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2022-02-15 01:14:34,380 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:34,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2022-02-15 01:14:34,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=298, Invalid=11912, Unknown=0, NotChecked=0, Total=12210 [2022-02-15 01:14:34,381 INFO L87 Difference]: Start difference. First operand 154 states and 155 transitions. Second operand has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 108 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:38,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:38,272 INFO L93 Difference]: Finished difference Result 166 states and 170 transitions. [2022-02-15 01:14:38,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2022-02-15 01:14:38,272 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 108 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 152 [2022-02-15 01:14:38,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:38,273 INFO L225 Difference]: With dead ends: 166 [2022-02-15 01:14:38,273 INFO L226 Difference]: Without dead ends: 158 [2022-02-15 01:14:38,275 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 43 SyntacticMatches, 2 SemanticMatches, 213 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15424 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=839, Invalid=45171, Unknown=0, NotChecked=0, Total=46010 [2022-02-15 01:14:38,275 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 186 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 12726 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 12787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 12726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:38,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 437 Invalid, 12787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 12726 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-02-15 01:14:38,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2022-02-15 01:14:38,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2022-02-15 01:14:38,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 152 states have (on average 1.013157894736842) internal successors, (154), 152 states have internal predecessors, (154), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:38,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 158 transitions. [2022-02-15 01:14:38,294 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 158 transitions. Word has length 152 [2022-02-15 01:14:38,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:38,294 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 158 transitions. [2022-02-15 01:14:38,294 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 108 states have internal predecessors, (148), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:38,294 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 158 transitions. [2022-02-15 01:14:38,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-02-15 01:14:38,295 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:38,295 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 39, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:38,295 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-15 01:14:38,296 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:38,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:38,297 INFO L85 PathProgramCache]: Analyzing trace with hash -295797874, now seen corresponding path program 47 times [2022-02-15 01:14:38,297 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:38,297 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [902059902] [2022-02-15 01:14:38,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:38,331 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:38,371 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:38,371 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:38,409 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:38,449 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:38,449 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:38,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:38,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:38,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:38,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:38,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:40,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:40,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [902059902] [2022-02-15 01:14:40,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [902059902] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:40,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:40,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [112] imperfect sequences [] total 112 [2022-02-15 01:14:40,769 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952319628] [2022-02-15 01:14:40,769 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:40,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2022-02-15 01:14:40,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:40,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2022-02-15 01:14:40,770 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=303, Invalid=12353, Unknown=0, NotChecked=0, Total=12656 [2022-02-15 01:14:40,771 INFO L87 Difference]: Start difference. First operand 157 states and 158 transitions. Second operand has 112 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 110 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:46,334 INFO L93 Difference]: Finished difference Result 169 states and 173 transitions. [2022-02-15 01:14:46,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2022-02-15 01:14:46,334 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 110 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-02-15 01:14:46,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:46,335 INFO L225 Difference]: With dead ends: 169 [2022-02-15 01:14:46,335 INFO L226 Difference]: Without dead ends: 161 [2022-02-15 01:14:46,337 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 44 SyntacticMatches, 2 SemanticMatches, 217 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16005 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=854, Invalid=46888, Unknown=0, NotChecked=0, Total=47742 [2022-02-15 01:14:46,338 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 189 mSDsluCounter, 407 mSDsCounter, 0 mSdLazyCounter, 12384 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 189 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 12446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 12384 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:46,338 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [189 Valid, 417 Invalid, 12446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 12384 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-02-15 01:14:46,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2022-02-15 01:14:46,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2022-02-15 01:14:46,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 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) [2022-02-15 01:14:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 161 transitions. [2022-02-15 01:14:46,358 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 161 transitions. Word has length 155 [2022-02-15 01:14:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:46,358 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 161 transitions. [2022-02-15 01:14:46,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 111 states have (on average 1.3603603603603605) internal successors, (151), 110 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:46,358 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 161 transitions. [2022-02-15 01:14:46,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-02-15 01:14:46,358 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:46,359 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 40, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:46,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-15 01:14:46,359 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:46,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash 187878537, now seen corresponding path program 48 times [2022-02-15 01:14:46,359 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:46,359 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017345291] [2022-02-15 01:14:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:46,399 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:46,428 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:46,428 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:46,456 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:46,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:46,493 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:46,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:46,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:46,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:46,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:46,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:49,615 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:49,615 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017345291] [2022-02-15 01:14:49,615 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017345291] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:49,615 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:49,615 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [114] imperfect sequences [] total 114 [2022-02-15 01:14:49,615 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076896115] [2022-02-15 01:14:49,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:49,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2022-02-15 01:14:49,615 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:49,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2022-02-15 01:14:49,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=308, Invalid=12802, Unknown=0, NotChecked=0, Total=13110 [2022-02-15 01:14:49,617 INFO L87 Difference]: Start difference. First operand 160 states and 161 transitions. Second operand has 114 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 112 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:55,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:14:55,455 INFO L93 Difference]: Finished difference Result 172 states and 176 transitions. [2022-02-15 01:14:55,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2022-02-15 01:14:55,455 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 112 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 158 [2022-02-15 01:14:55,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:14:55,456 INFO L225 Difference]: With dead ends: 172 [2022-02-15 01:14:55,456 INFO L226 Difference]: Without dead ends: 164 [2022-02-15 01:14:55,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 268 GetRequests, 45 SyntacticMatches, 2 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16596 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=869, Invalid=48637, Unknown=0, NotChecked=0, Total=49506 [2022-02-15 01:14:55,459 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 193 mSDsluCounter, 417 mSDsCounter, 0 mSdLazyCounter, 12936 mSolverCounterSat, 63 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 427 SdHoareTripleChecker+Invalid, 12999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 63 IncrementalHoareTripleChecker+Valid, 12936 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:14:55,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 427 Invalid, 12999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [63 Valid, 12936 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 01:14:55,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-15 01:14:55,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2022-02-15 01:14:55,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 158 states have (on average 1.0126582278481013) internal successors, (160), 158 states have internal predecessors, (160), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:55,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 164 transitions. [2022-02-15 01:14:55,483 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 164 transitions. Word has length 158 [2022-02-15 01:14:55,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:14:55,484 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 164 transitions. [2022-02-15 01:14:55,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 113 states have (on average 1.3628318584070795) internal successors, (154), 112 states have internal predecessors, (154), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:14:55,485 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 164 transitions. [2022-02-15 01:14:55,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2022-02-15 01:14:55,485 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:14:55,485 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 41, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:14:55,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-15 01:14:55,485 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:14:55,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:14:55,485 INFO L85 PathProgramCache]: Analyzing trace with hash -223439442, now seen corresponding path program 49 times [2022-02-15 01:14:55,486 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:14:55,486 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2017701455] [2022-02-15 01:14:55,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:14:55,514 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:55,540 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:55,540 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:55,586 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:55,622 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:14:55,622 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:14:55,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:14:55,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:55,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:14:55,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:14:55,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:14:58,095 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:14:58,096 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2017701455] [2022-02-15 01:14:58,096 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2017701455] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:14:58,096 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:14:58,096 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [116] imperfect sequences [] total 116 [2022-02-15 01:14:58,096 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677808219] [2022-02-15 01:14:58,096 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:14:58,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2022-02-15 01:14:58,096 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:14:58,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2022-02-15 01:14:58,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=313, Invalid=13259, Unknown=0, NotChecked=0, Total=13572 [2022-02-15 01:14:58,098 INFO L87 Difference]: Start difference. First operand 163 states and 164 transitions. Second operand has 116 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 114 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:02,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:02,852 INFO L93 Difference]: Finished difference Result 175 states and 179 transitions. [2022-02-15 01:15:02,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2022-02-15 01:15:02,852 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 114 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 161 [2022-02-15 01:15:02,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:02,854 INFO L225 Difference]: With dead ends: 175 [2022-02-15 01:15:02,854 INFO L226 Difference]: Without dead ends: 167 [2022-02-15 01:15:02,856 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 273 GetRequests, 46 SyntacticMatches, 2 SemanticMatches, 225 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17197 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=884, Invalid=50418, Unknown=0, NotChecked=0, Total=51302 [2022-02-15 01:15:02,862 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 198 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 13817 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 13881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 13817 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:02,862 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 447 Invalid, 13881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 13817 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-02-15 01:15:02,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2022-02-15 01:15:02,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 166. [2022-02-15 01:15:02,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 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) [2022-02-15 01:15:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 167 transitions. [2022-02-15 01:15:02,883 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 167 transitions. Word has length 161 [2022-02-15 01:15:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:02,883 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 167 transitions. [2022-02-15 01:15:02,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 115 states have (on average 1.3652173913043477) internal successors, (157), 114 states have internal predecessors, (157), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:02,884 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 167 transitions. [2022-02-15 01:15:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-02-15 01:15:02,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:02,884 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 42, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:02,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-15 01:15:02,884 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:02,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:02,884 INFO L85 PathProgramCache]: Analyzing trace with hash -255656343, now seen corresponding path program 50 times [2022-02-15 01:15:02,884 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:02,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1358966928] [2022-02-15 01:15:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:02,940 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:02,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:02,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:02,985 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:03,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:03,023 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:03,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:03,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:03,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:03,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:03,095 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:05,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:05,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1358966928] [2022-02-15 01:15:05,673 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1358966928] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:05,673 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:05,673 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [118] imperfect sequences [] total 118 [2022-02-15 01:15:05,673 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542964415] [2022-02-15 01:15:05,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:05,673 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2022-02-15 01:15:05,673 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:05,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2022-02-15 01:15:05,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=13724, Unknown=0, NotChecked=0, Total=14042 [2022-02-15 01:15:05,674 INFO L87 Difference]: Start difference. First operand 166 states and 167 transitions. Second operand has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 116 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:10,097 INFO L93 Difference]: Finished difference Result 178 states and 182 transitions. [2022-02-15 01:15:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2022-02-15 01:15:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 116 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 164 [2022-02-15 01:15:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:10,098 INFO L225 Difference]: With dead ends: 178 [2022-02-15 01:15:10,098 INFO L226 Difference]: Without dead ends: 170 [2022-02-15 01:15:10,100 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 47 SyntacticMatches, 2 SemanticMatches, 229 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17808 ImplicationChecksByTransitivity, 4.3s TimeCoverageRelationStatistics Valid=899, Invalid=52231, Unknown=0, NotChecked=0, Total=53130 [2022-02-15 01:15:10,100 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 202 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 13601 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 202 SdHoareTripleChecker+Valid, 432 SdHoareTripleChecker+Invalid, 13666 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 13601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:10,101 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [202 Valid, 432 Invalid, 13666 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 13601 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 01:15:10,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2022-02-15 01:15:10,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2022-02-15 01:15:10,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 164 states have (on average 1.0121951219512195) internal successors, (166), 164 states have internal predecessors, (166), 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) [2022-02-15 01:15:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 170 transitions. [2022-02-15 01:15:10,122 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 170 transitions. Word has length 164 [2022-02-15 01:15:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:10,123 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 170 transitions. [2022-02-15 01:15:10,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 1.3675213675213675) internal successors, (160), 116 states have internal predecessors, (160), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:10,123 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 170 transitions. [2022-02-15 01:15:10,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-02-15 01:15:10,123 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:10,123 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 43, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:10,123 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-15 01:15:10,123 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:10,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:10,124 INFO L85 PathProgramCache]: Analyzing trace with hash 2043320270, now seen corresponding path program 51 times [2022-02-15 01:15:10,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:10,124 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399588495] [2022-02-15 01:15:10,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:10,162 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:10,182 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:10,182 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:10,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:10,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:10,236 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:10,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:10,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:10,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:10,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:13,024 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:13,024 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399588495] [2022-02-15 01:15:13,024 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399588495] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:13,024 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:13,024 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [120] imperfect sequences [] total 120 [2022-02-15 01:15:13,025 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123780154] [2022-02-15 01:15:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:13,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2022-02-15 01:15:13,025 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:13,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2022-02-15 01:15:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=323, Invalid=14197, Unknown=0, NotChecked=0, Total=14520 [2022-02-15 01:15:13,026 INFO L87 Difference]: Start difference. First operand 169 states and 170 transitions. Second operand has 120 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 118 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:17,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:17,615 INFO L93 Difference]: Finished difference Result 181 states and 185 transitions. [2022-02-15 01:15:17,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2022-02-15 01:15:17,616 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 118 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-02-15 01:15:17,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:17,616 INFO L225 Difference]: With dead ends: 181 [2022-02-15 01:15:17,616 INFO L226 Difference]: Without dead ends: 173 [2022-02-15 01:15:17,618 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 233 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18431 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=914, Invalid=54076, Unknown=0, NotChecked=0, Total=54990 [2022-02-15 01:15:17,619 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 206 mSDsluCounter, 442 mSDsCounter, 0 mSdLazyCounter, 14507 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 206 SdHoareTripleChecker+Valid, 452 SdHoareTripleChecker+Invalid, 14573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 14507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:17,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [206 Valid, 452 Invalid, 14573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 14507 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-02-15 01:15:17,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-02-15 01:15:17,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 172. [2022-02-15 01:15:17,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 states have internal predecessors, (169), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:17,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 173 transitions. [2022-02-15 01:15:17,641 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 173 transitions. Word has length 167 [2022-02-15 01:15:17,641 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:17,641 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 173 transitions. [2022-02-15 01:15:17,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 1.3697478991596639) internal successors, (163), 118 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:17,641 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 173 transitions. [2022-02-15 01:15:17,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-02-15 01:15:17,642 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:17,642 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 44, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:17,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-15 01:15:17,642 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:17,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:17,642 INFO L85 PathProgramCache]: Analyzing trace with hash -987871159, now seen corresponding path program 52 times [2022-02-15 01:15:17,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:17,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1786590538] [2022-02-15 01:15:17,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:17,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:17,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:17,704 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:17,724 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:17,764 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:17,764 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:17,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:17,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:17,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:17,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:21,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:21,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1786590538] [2022-02-15 01:15:21,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1786590538] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:21,119 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:21,119 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [122] imperfect sequences [] total 122 [2022-02-15 01:15:21,119 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856368768] [2022-02-15 01:15:21,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:21,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2022-02-15 01:15:21,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:21,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2022-02-15 01:15:21,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=14678, Unknown=0, NotChecked=0, Total=15006 [2022-02-15 01:15:21,121 INFO L87 Difference]: Start difference. First operand 172 states and 173 transitions. Second operand has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:27,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:27,006 INFO L93 Difference]: Finished difference Result 184 states and 188 transitions. [2022-02-15 01:15:27,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2022-02-15 01:15:27,006 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 170 [2022-02-15 01:15:27,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:27,007 INFO L225 Difference]: With dead ends: 184 [2022-02-15 01:15:27,007 INFO L226 Difference]: Without dead ends: 176 [2022-02-15 01:15:27,009 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 288 GetRequests, 49 SyntacticMatches, 2 SemanticMatches, 237 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19060 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=929, Invalid=55953, Unknown=0, NotChecked=0, Total=56882 [2022-02-15 01:15:27,009 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 210 mSDsluCounter, 467 mSDsCounter, 0 mSdLazyCounter, 15601 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 210 SdHoareTripleChecker+Valid, 477 SdHoareTripleChecker+Invalid, 15668 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 15601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:27,009 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [210 Valid, 477 Invalid, 15668 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 15601 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-02-15 01:15:27,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2022-02-15 01:15:27,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2022-02-15 01:15:27,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 170 states have (on average 1.011764705882353) internal successors, (172), 170 states have internal predecessors, (172), 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) [2022-02-15 01:15:27,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 176 transitions. [2022-02-15 01:15:27,032 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 176 transitions. Word has length 170 [2022-02-15 01:15:27,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:27,032 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 176 transitions. [2022-02-15 01:15:27,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 121 states have (on average 1.371900826446281) internal successors, (166), 120 states have internal predecessors, (166), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:27,032 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 176 transitions. [2022-02-15 01:15:27,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2022-02-15 01:15:27,033 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:27,033 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 45, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:27,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-15 01:15:27,033 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:27,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:27,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1524334098, now seen corresponding path program 53 times [2022-02-15 01:15:27,033 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:27,033 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [793040685] [2022-02-15 01:15:27,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:27,093 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:27,134 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:27,134 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:27,173 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:27,213 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:27,213 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:27,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:27,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:27,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:27,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:27,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:30,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:30,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [793040685] [2022-02-15 01:15:30,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [793040685] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:30,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:30,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [124] imperfect sequences [] total 124 [2022-02-15 01:15:30,510 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220362838] [2022-02-15 01:15:30,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:30,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2022-02-15 01:15:30,511 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:30,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2022-02-15 01:15:30,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=15167, Unknown=0, NotChecked=0, Total=15500 [2022-02-15 01:15:30,513 INFO L87 Difference]: Start difference. First operand 175 states and 176 transitions. Second operand has 124 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 122 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:35,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:35,728 INFO L93 Difference]: Finished difference Result 187 states and 191 transitions. [2022-02-15 01:15:35,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2022-02-15 01:15:35,728 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 122 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 173 [2022-02-15 01:15:35,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:35,729 INFO L225 Difference]: With dead ends: 187 [2022-02-15 01:15:35,729 INFO L226 Difference]: Without dead ends: 179 [2022-02-15 01:15:35,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 50 SyntacticMatches, 2 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19701 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=944, Invalid=57862, Unknown=0, NotChecked=0, Total=58806 [2022-02-15 01:15:35,732 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 214 mSDsluCounter, 477 mSDsCounter, 0 mSdLazyCounter, 16220 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 214 SdHoareTripleChecker+Valid, 487 SdHoareTripleChecker+Invalid, 16288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 16220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:35,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [214 Valid, 487 Invalid, 16288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 16220 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-02-15 01:15:35,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-15 01:15:35,755 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2022-02-15 01:15:35,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 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) [2022-02-15 01:15:35,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 179 transitions. [2022-02-15 01:15:35,756 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 179 transitions. Word has length 173 [2022-02-15 01:15:35,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:35,756 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 179 transitions. [2022-02-15 01:15:35,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 1.3739837398373984) internal successors, (169), 122 states have internal predecessors, (169), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:35,756 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 179 transitions. [2022-02-15 01:15:35,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-02-15 01:15:35,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:35,757 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 46, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:35,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-15 01:15:35,757 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:35,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:35,757 INFO L85 PathProgramCache]: Analyzing trace with hash -1718441431, now seen corresponding path program 54 times [2022-02-15 01:15:35,757 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:35,757 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499057461] [2022-02-15 01:15:35,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:35,823 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:35,855 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:35,855 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:35,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:35,942 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:35,943 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:35,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:35,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:36,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:36,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:39,318 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:39,318 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499057461] [2022-02-15 01:15:39,318 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499057461] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:39,318 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:39,318 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [126] imperfect sequences [] total 126 [2022-02-15 01:15:39,319 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316473033] [2022-02-15 01:15:39,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:39,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2022-02-15 01:15:39,319 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:39,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2022-02-15 01:15:39,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=338, Invalid=15664, Unknown=0, NotChecked=0, Total=16002 [2022-02-15 01:15:39,320 INFO L87 Difference]: Start difference. First operand 178 states and 179 transitions. Second operand has 126 states, 125 states have (on average 1.376) internal successors, (172), 124 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:45,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:45,331 INFO L93 Difference]: Finished difference Result 190 states and 194 transitions. [2022-02-15 01:15:45,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2022-02-15 01:15:45,331 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 1.376) internal successors, (172), 124 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 176 [2022-02-15 01:15:45,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:45,332 INFO L225 Difference]: With dead ends: 190 [2022-02-15 01:15:45,332 INFO L226 Difference]: Without dead ends: 182 [2022-02-15 01:15:45,335 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 298 GetRequests, 51 SyntacticMatches, 2 SemanticMatches, 245 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20352 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=959, Invalid=59803, Unknown=0, NotChecked=0, Total=60762 [2022-02-15 01:15:45,335 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 218 mSDsluCounter, 437 mSDsCounter, 0 mSdLazyCounter, 15139 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 15208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 15139 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:45,335 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 447 Invalid, 15208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 15139 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-02-15 01:15:45,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-15 01:15:45,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2022-02-15 01:15:45,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 176 states have (on average 1.0113636363636365) internal successors, (178), 176 states have internal predecessors, (178), 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) [2022-02-15 01:15:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 182 transitions. [2022-02-15 01:15:45,370 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 182 transitions. Word has length 176 [2022-02-15 01:15:45,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:45,370 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 182 transitions. [2022-02-15 01:15:45,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 1.376) internal successors, (172), 124 states have internal predecessors, (172), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:45,370 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 182 transitions. [2022-02-15 01:15:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-02-15 01:15:45,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:45,371 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 47, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:45,371 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-15 01:15:45,371 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:45,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:45,371 INFO L85 PathProgramCache]: Analyzing trace with hash 950948878, now seen corresponding path program 55 times [2022-02-15 01:15:45,371 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:45,371 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [634303167] [2022-02-15 01:15:45,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:45,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:45,460 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:45,461 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:45,498 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:45,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:45,535 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:45,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:45,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:45,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:45,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:45,593 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:15:49,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:15:49,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [634303167] [2022-02-15 01:15:49,991 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [634303167] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:15:49,991 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:15:49,991 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [128] imperfect sequences [] total 128 [2022-02-15 01:15:49,991 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862115619] [2022-02-15 01:15:49,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:15:49,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2022-02-15 01:15:49,991 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:15:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2022-02-15 01:15:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=343, Invalid=16169, Unknown=0, NotChecked=0, Total=16512 [2022-02-15 01:15:49,993 INFO L87 Difference]: Start difference. First operand 181 states and 182 transitions. Second operand has 128 states, 127 states have (on average 1.3779527559055118) internal successors, (175), 126 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:57,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:15:57,831 INFO L93 Difference]: Finished difference Result 193 states and 197 transitions. [2022-02-15 01:15:57,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2022-02-15 01:15:57,832 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 1.3779527559055118) internal successors, (175), 126 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-02-15 01:15:57,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:15:57,833 INFO L225 Difference]: With dead ends: 193 [2022-02-15 01:15:57,833 INFO L226 Difference]: Without dead ends: 185 [2022-02-15 01:15:57,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 303 GetRequests, 52 SyntacticMatches, 2 SemanticMatches, 249 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21013 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=974, Invalid=61776, Unknown=0, NotChecked=0, Total=62750 [2022-02-15 01:15:57,836 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 221 mSDsluCounter, 497 mSDsCounter, 0 mSdLazyCounter, 17496 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 507 SdHoareTripleChecker+Invalid, 17566 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 17496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:15:57,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 507 Invalid, 17566 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 17496 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 01:15:57,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-15 01:15:57,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-02-15 01:15:57,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 states have internal predecessors, (181), 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) [2022-02-15 01:15:57,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 185 transitions. [2022-02-15 01:15:57,876 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 185 transitions. Word has length 179 [2022-02-15 01:15:57,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:15:57,876 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 185 transitions. [2022-02-15 01:15:57,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 1.3779527559055118) internal successors, (175), 126 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:15:57,876 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 185 transitions. [2022-02-15 01:15:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-02-15 01:15:57,877 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:15:57,877 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 48, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:15:57,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-15 01:15:57,877 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:15:57,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:15:57,877 INFO L85 PathProgramCache]: Analyzing trace with hash -856808439, now seen corresponding path program 56 times [2022-02-15 01:15:57,877 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:15:57,877 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [647999339] [2022-02-15 01:15:57,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:15:57,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:57,965 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:57,966 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:57,995 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:58,035 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:15:58,035 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:15:58,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:15:58,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:58,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:15:58,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:15:58,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:02,287 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:02,287 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [647999339] [2022-02-15 01:16:02,287 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [647999339] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:02,288 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:02,288 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [130] imperfect sequences [] total 130 [2022-02-15 01:16:02,288 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902628829] [2022-02-15 01:16:02,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:02,288 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2022-02-15 01:16:02,288 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:02,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2022-02-15 01:16:02,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=348, Invalid=16682, Unknown=0, NotChecked=0, Total=17030 [2022-02-15 01:16:02,289 INFO L87 Difference]: Start difference. First operand 184 states and 185 transitions. Second operand has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 128 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:07,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:07,996 INFO L93 Difference]: Finished difference Result 196 states and 200 transitions. [2022-02-15 01:16:07,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2022-02-15 01:16:07,996 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 128 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 182 [2022-02-15 01:16:08,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:08,005 INFO L225 Difference]: With dead ends: 196 [2022-02-15 01:16:08,005 INFO L226 Difference]: Without dead ends: 188 [2022-02-15 01:16:08,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 52 SyntacticMatches, 3 SemanticMatches, 253 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21686 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=989, Invalid=63781, Unknown=0, NotChecked=0, Total=64770 [2022-02-15 01:16:08,008 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 226 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 17438 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 226 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 17509 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 17438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:08,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [226 Valid, 497 Invalid, 17509 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 17438 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:16:08,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2022-02-15 01:16:08,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2022-02-15 01:16:08,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 182 states have (on average 1.010989010989011) internal successors, (184), 182 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:08,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 188 transitions. [2022-02-15 01:16:08,034 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 188 transitions. Word has length 182 [2022-02-15 01:16:08,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:08,034 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 188 transitions. [2022-02-15 01:16:08,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 129 states have (on average 1.37984496124031) internal successors, (178), 128 states have internal predecessors, (178), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:08,034 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 188 transitions. [2022-02-15 01:16:08,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2022-02-15 01:16:08,034 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:08,035 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 49, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:08,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-15 01:16:08,035 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:08,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:08,035 INFO L85 PathProgramCache]: Analyzing trace with hash -1160114642, now seen corresponding path program 57 times [2022-02-15 01:16:08,035 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:08,035 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [417138452] [2022-02-15 01:16:08,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:08,072 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:08,110 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:08,111 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:08,140 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:08,191 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:08,191 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:08,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:08,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:08,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:08,247 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:11,355 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:11,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [417138452] [2022-02-15 01:16:11,356 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [417138452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:11,356 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:11,356 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [132] imperfect sequences [] total 132 [2022-02-15 01:16:11,356 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1476655546] [2022-02-15 01:16:11,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:11,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 132 states [2022-02-15 01:16:11,356 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:11,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 132 interpolants. [2022-02-15 01:16:11,357 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=17203, Unknown=0, NotChecked=0, Total=17556 [2022-02-15 01:16:11,358 INFO L87 Difference]: Start difference. First operand 187 states and 188 transitions. Second operand has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 130 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:17,197 INFO L93 Difference]: Finished difference Result 199 states and 203 transitions. [2022-02-15 01:16:17,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2022-02-15 01:16:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 130 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 185 [2022-02-15 01:16:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:17,198 INFO L225 Difference]: With dead ends: 199 [2022-02-15 01:16:17,198 INFO L226 Difference]: Without dead ends: 191 [2022-02-15 01:16:17,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 313 GetRequests, 54 SyntacticMatches, 2 SemanticMatches, 257 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22365 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1004, Invalid=65818, Unknown=0, NotChecked=0, Total=66822 [2022-02-15 01:16:17,200 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 229 mSDsluCounter, 452 mSDsCounter, 0 mSdLazyCounter, 16476 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 16548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 16476 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:17,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 462 Invalid, 16548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 16476 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-02-15 01:16:17,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2022-02-15 01:16:17,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 190. [2022-02-15 01:16:17,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 states have internal predecessors, (187), 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) [2022-02-15 01:16:17,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 191 transitions. [2022-02-15 01:16:17,254 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 191 transitions. Word has length 185 [2022-02-15 01:16:17,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:17,254 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 191 transitions. [2022-02-15 01:16:17,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 132 states, 131 states have (on average 1.381679389312977) internal successors, (181), 130 states have internal predecessors, (181), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:17,254 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 191 transitions. [2022-02-15 01:16:17,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-02-15 01:16:17,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:17,255 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 50, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:17,263 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-15 01:16:17,263 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:17,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:17,264 INFO L85 PathProgramCache]: Analyzing trace with hash -344017431, now seen corresponding path program 58 times [2022-02-15 01:16:17,264 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:17,264 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110732802] [2022-02-15 01:16:17,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:17,307 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:17,349 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:17,349 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:17,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:17,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:17,458 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:17,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:17,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:17,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:17,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:17,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:22,260 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:22,261 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110732802] [2022-02-15 01:16:22,261 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [110732802] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:22,261 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:22,261 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [134] imperfect sequences [] total 134 [2022-02-15 01:16:22,261 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865647324] [2022-02-15 01:16:22,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:22,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2022-02-15 01:16:22,261 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:22,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2022-02-15 01:16:22,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=358, Invalid=17732, Unknown=0, NotChecked=0, Total=18090 [2022-02-15 01:16:22,262 INFO L87 Difference]: Start difference. First operand 190 states and 191 transitions. Second operand has 134 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 132 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:29,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:29,783 INFO L93 Difference]: Finished difference Result 202 states and 206 transitions. [2022-02-15 01:16:29,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2022-02-15 01:16:29,783 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 132 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 188 [2022-02-15 01:16:29,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:29,784 INFO L225 Difference]: With dead ends: 202 [2022-02-15 01:16:29,784 INFO L226 Difference]: Without dead ends: 194 [2022-02-15 01:16:29,786 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 261 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23056 ImplicationChecksByTransitivity, 7.6s TimeCoverageRelationStatistics Valid=1019, Invalid=67887, Unknown=0, NotChecked=0, Total=68906 [2022-02-15 01:16:29,786 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 234 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 18214 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 234 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 18287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 18214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:29,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [234 Valid, 502 Invalid, 18287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 18214 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2022-02-15 01:16:29,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2022-02-15 01:16:29,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2022-02-15 01:16:29,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 188 states have (on average 1.0106382978723405) internal successors, (190), 188 states have internal predecessors, (190), 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) [2022-02-15 01:16:29,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 194 transitions. [2022-02-15 01:16:29,815 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 194 transitions. Word has length 188 [2022-02-15 01:16:29,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:29,815 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 194 transitions. [2022-02-15 01:16:29,815 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 1.3834586466165413) internal successors, (184), 132 states have internal predecessors, (184), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:29,816 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 194 transitions. [2022-02-15 01:16:29,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-02-15 01:16:29,816 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:29,816 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 51, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:29,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-15 01:16:29,816 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:29,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:29,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1801867186, now seen corresponding path program 59 times [2022-02-15 01:16:29,817 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:29,817 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777661728] [2022-02-15 01:16:29,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:29,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:29,880 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:29,880 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:29,903 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:29,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:29,933 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:29,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:29,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:29,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:29,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:33,423 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:33,424 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777661728] [2022-02-15 01:16:33,424 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777661728] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:33,424 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:33,424 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [136] imperfect sequences [] total 136 [2022-02-15 01:16:33,424 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950923501] [2022-02-15 01:16:33,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:33,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 136 states [2022-02-15 01:16:33,431 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:33,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 136 interpolants. [2022-02-15 01:16:33,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=18269, Unknown=0, NotChecked=0, Total=18632 [2022-02-15 01:16:33,434 INFO L87 Difference]: Start difference. First operand 193 states and 194 transitions. Second operand has 136 states, 135 states have (on average 1.385185185185185) internal successors, (187), 134 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:40,352 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:40,352 INFO L93 Difference]: Finished difference Result 205 states and 209 transitions. [2022-02-15 01:16:40,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2022-02-15 01:16:40,353 INFO L78 Accepts]: Start accepts. Automaton has has 136 states, 135 states have (on average 1.385185185185185) internal successors, (187), 134 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-02-15 01:16:40,353 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:40,354 INFO L225 Difference]: With dead ends: 205 [2022-02-15 01:16:40,354 INFO L226 Difference]: Without dead ends: 197 [2022-02-15 01:16:40,357 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 265 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23757 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1034, Invalid=69988, Unknown=0, NotChecked=0, Total=71022 [2022-02-15 01:16:40,360 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 237 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 18324 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 497 SdHoareTripleChecker+Invalid, 18398 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 18324 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:40,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 497 Invalid, 18398 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 18324 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-02-15 01:16:40,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2022-02-15 01:16:40,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 196. [2022-02-15 01:16:40,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 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) [2022-02-15 01:16:40,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 197 transitions. [2022-02-15 01:16:40,406 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 197 transitions. Word has length 191 [2022-02-15 01:16:40,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:40,406 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 197 transitions. [2022-02-15 01:16:40,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 136 states, 135 states have (on average 1.385185185185185) internal successors, (187), 134 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:40,406 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 197 transitions. [2022-02-15 01:16:40,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-02-15 01:16:40,407 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:40,407 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 52, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:40,407 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-15 01:16:40,407 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:40,408 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:40,408 INFO L85 PathProgramCache]: Analyzing trace with hash -1894621239, now seen corresponding path program 60 times [2022-02-15 01:16:40,408 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:40,408 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549630184] [2022-02-15 01:16:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:40,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:40,497 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:40,498 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:40,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:40,579 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:40,579 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:40,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:40,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:40,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:40,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:40,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:45,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:45,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549630184] [2022-02-15 01:16:45,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549630184] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:45,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:45,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [138] imperfect sequences [] total 138 [2022-02-15 01:16:45,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328673818] [2022-02-15 01:16:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:45,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2022-02-15 01:16:45,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2022-02-15 01:16:45,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=368, Invalid=18814, Unknown=0, NotChecked=0, Total=19182 [2022-02-15 01:16:45,104 INFO L87 Difference]: Start difference. First operand 196 states and 197 transitions. Second operand has 138 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 136 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:51,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:16:51,902 INFO L93 Difference]: Finished difference Result 208 states and 212 transitions. [2022-02-15 01:16:51,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 135 states. [2022-02-15 01:16:51,903 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 136 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 194 [2022-02-15 01:16:51,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:16:51,904 INFO L225 Difference]: With dead ends: 208 [2022-02-15 01:16:51,904 INFO L226 Difference]: Without dead ends: 200 [2022-02-15 01:16:51,920 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 328 GetRequests, 56 SyntacticMatches, 3 SemanticMatches, 269 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24470 ImplicationChecksByTransitivity, 7.0s TimeCoverageRelationStatistics Valid=1049, Invalid=72121, Unknown=0, NotChecked=0, Total=73170 [2022-02-15 01:16:51,920 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 241 mSDsluCounter, 532 mSDsCounter, 0 mSdLazyCounter, 20319 mSolverCounterSat, 75 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 241 SdHoareTripleChecker+Valid, 542 SdHoareTripleChecker+Invalid, 20394 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 75 IncrementalHoareTripleChecker+Valid, 20319 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:16:51,920 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [241 Valid, 542 Invalid, 20394 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [75 Valid, 20319 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2022-02-15 01:16:51,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-15 01:16:51,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2022-02-15 01:16:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 194 states have (on average 1.0103092783505154) internal successors, (196), 194 states have internal predecessors, (196), 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) [2022-02-15 01:16:51,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 200 transitions. [2022-02-15 01:16:51,999 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 200 transitions. Word has length 194 [2022-02-15 01:16:51,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:16:51,999 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 200 transitions. [2022-02-15 01:16:52,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 1.3868613138686132) internal successors, (190), 136 states have internal predecessors, (190), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:16:52,000 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 200 transitions. [2022-02-15 01:16:52,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2022-02-15 01:16:52,001 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:16:52,001 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 53, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:16:52,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-15 01:16:52,001 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:16:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:16:52,002 INFO L85 PathProgramCache]: Analyzing trace with hash 828324462, now seen corresponding path program 61 times [2022-02-15 01:16:52,002 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:16:52,002 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [380713568] [2022-02-15 01:16:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:16:52,041 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:52,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:52,084 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:52,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:52,163 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:16:52,164 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:16:52,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:16:52,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:52,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:16:52,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:16:52,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:16:56,106 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:16:56,106 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [380713568] [2022-02-15 01:16:56,106 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [380713568] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:16:56,106 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:16:56,106 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [140] imperfect sequences [] total 140 [2022-02-15 01:16:56,107 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808014254] [2022-02-15 01:16:56,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:16:56,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 140 states [2022-02-15 01:16:56,107 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:16:56,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 140 interpolants. [2022-02-15 01:16:56,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=19367, Unknown=0, NotChecked=0, Total=19740 [2022-02-15 01:16:56,108 INFO L87 Difference]: Start difference. First operand 199 states and 200 transitions. Second operand has 140 states, 139 states have (on average 1.3884892086330936) internal successors, (193), 138 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:04,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:04,108 INFO L93 Difference]: Finished difference Result 211 states and 215 transitions. [2022-02-15 01:17:04,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 137 states. [2022-02-15 01:17:04,109 INFO L78 Accepts]: Start accepts. Automaton has has 140 states, 139 states have (on average 1.3884892086330936) internal successors, (193), 138 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 197 [2022-02-15 01:17:04,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:04,109 INFO L225 Difference]: With dead ends: 211 [2022-02-15 01:17:04,110 INFO L226 Difference]: Without dead ends: 203 [2022-02-15 01:17:04,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 57 SyntacticMatches, 3 SemanticMatches, 273 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25191 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1064, Invalid=74286, Unknown=0, NotChecked=0, Total=75350 [2022-02-15 01:17:04,113 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 246 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 21029 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 246 SdHoareTripleChecker+Valid, 552 SdHoareTripleChecker+Invalid, 21105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 21029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:04,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [246 Valid, 552 Invalid, 21105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 21029 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2022-02-15 01:17:04,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-02-15 01:17:04,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 202. [2022-02-15 01:17:04,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:04,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 203 transitions. [2022-02-15 01:17:04,151 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 203 transitions. Word has length 197 [2022-02-15 01:17:04,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:04,151 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 203 transitions. [2022-02-15 01:17:04,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 140 states, 139 states have (on average 1.3884892086330936) internal successors, (193), 138 states have internal predecessors, (193), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:04,152 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 203 transitions. [2022-02-15 01:17:04,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-02-15 01:17:04,152 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:04,152 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 54, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:04,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-15 01:17:04,152 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:04,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1056383401, now seen corresponding path program 62 times [2022-02-15 01:17:04,153 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:04,153 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [544405784] [2022-02-15 01:17:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:04,190 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:04,217 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:04,218 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:04,245 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:04,279 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:04,279 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:04,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:04,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:04,322 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:04,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:04,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:08,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:08,300 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [544405784] [2022-02-15 01:17:08,300 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [544405784] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:08,300 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:08,300 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [142] imperfect sequences [] total 142 [2022-02-15 01:17:08,300 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752815296] [2022-02-15 01:17:08,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:08,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 142 states [2022-02-15 01:17:08,301 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:08,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 142 interpolants. [2022-02-15 01:17:08,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=19928, Unknown=0, NotChecked=0, Total=20306 [2022-02-15 01:17:08,303 INFO L87 Difference]: Start difference. First operand 202 states and 203 transitions. Second operand has 142 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 140 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:16,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:16,977 INFO L93 Difference]: Finished difference Result 214 states and 218 transitions. [2022-02-15 01:17:16,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 139 states. [2022-02-15 01:17:16,978 INFO L78 Accepts]: Start accepts. Automaton has has 142 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 140 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 200 [2022-02-15 01:17:16,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:16,979 INFO L225 Difference]: With dead ends: 214 [2022-02-15 01:17:16,979 INFO L226 Difference]: Without dead ends: 206 [2022-02-15 01:17:16,982 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 60 SyntacticMatches, 1 SemanticMatches, 277 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25920 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=1079, Invalid=76483, Unknown=0, NotChecked=0, Total=77562 [2022-02-15 01:17:16,983 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 250 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 21159 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 250 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 21236 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 21159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:16,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [250 Valid, 547 Invalid, 21236 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 21159 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-15 01:17:16,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-02-15 01:17:17,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2022-02-15 01:17:17,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 200 states have (on average 1.01) internal successors, (202), 200 states have internal predecessors, (202), 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) [2022-02-15 01:17:17,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 206 transitions. [2022-02-15 01:17:17,014 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 206 transitions. Word has length 200 [2022-02-15 01:17:17,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:17,014 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 206 transitions. [2022-02-15 01:17:17,014 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 142 states, 141 states have (on average 1.3900709219858156) internal successors, (196), 140 states have internal predecessors, (196), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:17,014 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 206 transitions. [2022-02-15 01:17:17,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-02-15 01:17:17,015 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:17,015 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 55, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:17,015 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-15 01:17:17,015 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:17,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:17,015 INFO L85 PathProgramCache]: Analyzing trace with hash 521972878, now seen corresponding path program 63 times [2022-02-15 01:17:17,015 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:17,015 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2063512172] [2022-02-15 01:17:17,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:17,091 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:17,135 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:17,135 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:17,159 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:17,224 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:17,225 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:17,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:17,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:17,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:17,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:17,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:21,466 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:21,466 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2063512172] [2022-02-15 01:17:21,466 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2063512172] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:21,466 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:21,466 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [144] imperfect sequences [] total 144 [2022-02-15 01:17:21,466 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686579196] [2022-02-15 01:17:21,466 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:21,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2022-02-15 01:17:21,467 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:21,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2022-02-15 01:17:21,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=383, Invalid=20497, Unknown=0, NotChecked=0, Total=20880 [2022-02-15 01:17:21,468 INFO L87 Difference]: Start difference. First operand 205 states and 206 transitions. Second operand has 144 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 142 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:30,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:30,515 INFO L93 Difference]: Finished difference Result 217 states and 221 transitions. [2022-02-15 01:17:30,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 141 states. [2022-02-15 01:17:30,515 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 142 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-02-15 01:17:30,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:30,516 INFO L225 Difference]: With dead ends: 217 [2022-02-15 01:17:30,516 INFO L226 Difference]: Without dead ends: 209 [2022-02-15 01:17:30,519 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 343 GetRequests, 61 SyntacticMatches, 1 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26661 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=1094, Invalid=78712, Unknown=0, NotChecked=0, Total=79806 [2022-02-15 01:17:30,520 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 254 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 22674 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 254 SdHoareTripleChecker+Valid, 577 SdHoareTripleChecker+Invalid, 22752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 22674 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:30,520 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [254 Valid, 577 Invalid, 22752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 22674 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2022-02-15 01:17:30,520 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2022-02-15 01:17:30,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2022-02-15 01:17:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 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) [2022-02-15 01:17:30,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 209 transitions. [2022-02-15 01:17:30,551 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 209 transitions. Word has length 203 [2022-02-15 01:17:30,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:30,551 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 209 transitions. [2022-02-15 01:17:30,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 1.3916083916083917) internal successors, (199), 142 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:30,551 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 209 transitions. [2022-02-15 01:17:30,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-02-15 01:17:30,552 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:30,552 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 56, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:30,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-15 01:17:30,552 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:30,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:30,553 INFO L85 PathProgramCache]: Analyzing trace with hash 1341848457, now seen corresponding path program 64 times [2022-02-15 01:17:30,553 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:30,553 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1790025147] [2022-02-15 01:17:30,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:30,582 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:30,603 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:30,603 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:30,628 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:30,667 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:30,668 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:30,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:30,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:30,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:30,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:34,759 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:34,759 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1790025147] [2022-02-15 01:17:34,760 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1790025147] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:34,760 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:34,760 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [146] imperfect sequences [] total 146 [2022-02-15 01:17:34,760 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596024415] [2022-02-15 01:17:34,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:34,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 146 states [2022-02-15 01:17:34,760 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:34,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 146 interpolants. [2022-02-15 01:17:34,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=388, Invalid=21074, Unknown=0, NotChecked=0, Total=21462 [2022-02-15 01:17:34,762 INFO L87 Difference]: Start difference. First operand 208 states and 209 transitions. Second operand has 146 states, 145 states have (on average 1.393103448275862) internal successors, (202), 144 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:42,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:42,883 INFO L93 Difference]: Finished difference Result 220 states and 224 transitions. [2022-02-15 01:17:42,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 143 states. [2022-02-15 01:17:42,883 INFO L78 Accepts]: Start accepts. Automaton has has 146 states, 145 states have (on average 1.393103448275862) internal successors, (202), 144 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 206 [2022-02-15 01:17:42,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:42,884 INFO L225 Difference]: With dead ends: 220 [2022-02-15 01:17:42,884 INFO L226 Difference]: Without dead ends: 212 [2022-02-15 01:17:42,888 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 348 GetRequests, 60 SyntacticMatches, 3 SemanticMatches, 285 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27414 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=1109, Invalid=80973, Unknown=0, NotChecked=0, Total=82082 [2022-02-15 01:17:42,889 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 257 mSDsluCounter, 537 mSDsCounter, 0 mSdLazyCounter, 21808 mSolverCounterSat, 79 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 257 SdHoareTripleChecker+Valid, 547 SdHoareTripleChecker+Invalid, 21887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 79 IncrementalHoareTripleChecker+Valid, 21808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:42,889 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [257 Valid, 547 Invalid, 21887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [79 Valid, 21808 Invalid, 0 Unknown, 0 Unchecked, 4.5s Time] [2022-02-15 01:17:42,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2022-02-15 01:17:42,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2022-02-15 01:17:42,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 206 states have (on average 1.0097087378640777) internal successors, (208), 206 states have internal predecessors, (208), 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) [2022-02-15 01:17:42,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 212 transitions. [2022-02-15 01:17:42,926 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 212 transitions. Word has length 206 [2022-02-15 01:17:42,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:42,927 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 212 transitions. [2022-02-15 01:17:42,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 146 states, 145 states have (on average 1.393103448275862) internal successors, (202), 144 states have internal predecessors, (202), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:42,927 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 212 transitions. [2022-02-15 01:17:42,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2022-02-15 01:17:42,927 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:42,927 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 57, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:42,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-15 01:17:42,928 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:42,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:42,928 INFO L85 PathProgramCache]: Analyzing trace with hash 776210094, now seen corresponding path program 65 times [2022-02-15 01:17:42,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:42,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [803495066] [2022-02-15 01:17:42,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:42,982 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:43,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:43,022 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:43,062 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:43,102 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:43,102 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:43,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:43,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:43,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:43,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:43,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:17:48,360 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:17:48,360 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [803495066] [2022-02-15 01:17:48,360 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [803495066] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:17:48,360 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:17:48,360 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [148] imperfect sequences [] total 148 [2022-02-15 01:17:48,360 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003009368] [2022-02-15 01:17:48,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:17:48,361 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 148 states [2022-02-15 01:17:48,361 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:17:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 148 interpolants. [2022-02-15 01:17:48,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=21659, Unknown=0, NotChecked=0, Total=22052 [2022-02-15 01:17:48,363 INFO L87 Difference]: Start difference. First operand 211 states and 212 transitions. Second operand has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 146 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:56,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:17:56,947 INFO L93 Difference]: Finished difference Result 223 states and 227 transitions. [2022-02-15 01:17:56,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 145 states. [2022-02-15 01:17:56,947 INFO L78 Accepts]: Start accepts. Automaton has has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 146 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 209 [2022-02-15 01:17:56,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:17:56,948 INFO L225 Difference]: With dead ends: 223 [2022-02-15 01:17:56,948 INFO L226 Difference]: Without dead ends: 215 [2022-02-15 01:17:56,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 289 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28173 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=1124, Invalid=83266, Unknown=0, NotChecked=0, Total=84390 [2022-02-15 01:17:56,953 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 262 mSDsluCounter, 552 mSDsCounter, 0 mSdLazyCounter, 22748 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 562 SdHoareTripleChecker+Invalid, 22828 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 22748 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:17:56,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 562 Invalid, 22828 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 22748 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 01:17:56,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-02-15 01:17:57,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 214. [2022-02-15 01:17:57,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 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) [2022-02-15 01:17:57,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 215 transitions. [2022-02-15 01:17:57,023 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 215 transitions. Word has length 209 [2022-02-15 01:17:57,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:17:57,023 INFO L470 AbstractCegarLoop]: Abstraction has 214 states and 215 transitions. [2022-02-15 01:17:57,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 148 states, 147 states have (on average 1.3945578231292517) internal successors, (205), 146 states have internal predecessors, (205), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:17:57,024 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 215 transitions. [2022-02-15 01:17:57,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-02-15 01:17:57,024 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:17:57,024 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 58, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:17:57,024 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-15 01:17:57,025 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:17:57,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:17:57,025 INFO L85 PathProgramCache]: Analyzing trace with hash -999559831, now seen corresponding path program 66 times [2022-02-15 01:17:57,025 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:17:57,025 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [874191084] [2022-02-15 01:17:57,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:17:57,105 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:57,133 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:57,134 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:57,180 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:57,236 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:17:57,240 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:17:57,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:17:57,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:57,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:17:57,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:17:57,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:02,964 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:02,965 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [874191084] [2022-02-15 01:18:02,965 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [874191084] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:02,965 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:02,965 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [150] imperfect sequences [] total 150 [2022-02-15 01:18:02,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731441378] [2022-02-15 01:18:02,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:02,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 150 states [2022-02-15 01:18:02,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:02,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 150 interpolants. [2022-02-15 01:18:02,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=398, Invalid=22252, Unknown=0, NotChecked=0, Total=22650 [2022-02-15 01:18:02,968 INFO L87 Difference]: Start difference. First operand 214 states and 215 transitions. Second operand has 150 states, 149 states have (on average 1.395973154362416) internal successors, (208), 148 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:11,619 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:11,620 INFO L93 Difference]: Finished difference Result 226 states and 230 transitions. [2022-02-15 01:18:11,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 147 states. [2022-02-15 01:18:11,620 INFO L78 Accepts]: Start accepts. Automaton has has 150 states, 149 states have (on average 1.395973154362416) internal successors, (208), 148 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 212 [2022-02-15 01:18:11,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:11,621 INFO L225 Difference]: With dead ends: 226 [2022-02-15 01:18:11,621 INFO L226 Difference]: Without dead ends: 218 [2022-02-15 01:18:11,624 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 62 SyntacticMatches, 3 SemanticMatches, 293 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28946 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1139, Invalid=85591, Unknown=0, NotChecked=0, Total=86730 [2022-02-15 01:18:11,624 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 265 mSDsluCounter, 597 mSDsCounter, 0 mSdLazyCounter, 24943 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 25024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 24943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:11,624 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [265 Valid, 607 Invalid, 25024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 24943 Invalid, 0 Unknown, 0 Unchecked, 5.1s Time] [2022-02-15 01:18:11,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-02-15 01:18:11,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2022-02-15 01:18:11,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 212 states have (on average 1.009433962264151) internal successors, (214), 212 states have internal predecessors, (214), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:11,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 218 transitions. [2022-02-15 01:18:11,658 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 218 transitions. Word has length 212 [2022-02-15 01:18:11,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:11,658 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 218 transitions. [2022-02-15 01:18:11,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 150 states, 149 states have (on average 1.395973154362416) internal successors, (208), 148 states have internal predecessors, (208), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 218 transitions. [2022-02-15 01:18:11,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-02-15 01:18:11,659 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:11,659 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 59, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:11,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-15 01:18:11,659 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:11,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:11,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1849210674, now seen corresponding path program 67 times [2022-02-15 01:18:11,660 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:11,660 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995493699] [2022-02-15 01:18:11,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:11,735 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:11,773 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:11,773 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:11,801 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:11,850 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:11,851 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:11,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:11,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:11,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:11,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:11,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:16,434 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:16,434 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995493699] [2022-02-15 01:18:16,434 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [995493699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:16,434 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:16,434 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [152] imperfect sequences [] total 152 [2022-02-15 01:18:16,434 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096567932] [2022-02-15 01:18:16,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:16,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 152 states [2022-02-15 01:18:16,435 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:16,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 152 interpolants. [2022-02-15 01:18:16,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=403, Invalid=22853, Unknown=0, NotChecked=0, Total=23256 [2022-02-15 01:18:16,436 INFO L87 Difference]: Start difference. First operand 217 states and 218 transitions. Second operand has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:24,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:24,661 INFO L93 Difference]: Finished difference Result 229 states and 233 transitions. [2022-02-15 01:18:24,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-02-15 01:18:24,662 INFO L78 Accepts]: Start accepts. Automaton has has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-02-15 01:18:24,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:24,662 INFO L225 Difference]: With dead ends: 229 [2022-02-15 01:18:24,662 INFO L226 Difference]: Without dead ends: 221 [2022-02-15 01:18:24,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 363 GetRequests, 64 SyntacticMatches, 2 SemanticMatches, 297 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29725 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=1154, Invalid=87948, Unknown=0, NotChecked=0, Total=89102 [2022-02-15 01:18:24,666 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 269 mSDsluCounter, 592 mSDsCounter, 0 mSdLazyCounter, 25094 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 602 SdHoareTripleChecker+Invalid, 25176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 25094 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:24,666 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 602 Invalid, 25176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 25094 Invalid, 0 Unknown, 0 Unchecked, 4.8s Time] [2022-02-15 01:18:24,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-02-15 01:18:24,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 220. [2022-02-15 01:18:24,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 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) [2022-02-15 01:18:24,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 221 transitions. [2022-02-15 01:18:24,701 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 221 transitions. Word has length 215 [2022-02-15 01:18:24,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:24,701 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 221 transitions. [2022-02-15 01:18:24,701 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 152 states, 151 states have (on average 1.3973509933774835) internal successors, (211), 150 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:24,702 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 221 transitions. [2022-02-15 01:18:24,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-02-15 01:18:24,702 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:24,702 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 60, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:24,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-15 01:18:24,702 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:24,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash 739768137, now seen corresponding path program 68 times [2022-02-15 01:18:24,703 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:24,703 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022262722] [2022-02-15 01:18:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:24,759 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:24,797 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:24,797 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:24,835 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:24,885 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:24,885 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:24,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:24,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:24,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:24,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:31,034 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:31,034 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022262722] [2022-02-15 01:18:31,034 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022262722] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:31,034 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:31,034 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [154] imperfect sequences [] total 154 [2022-02-15 01:18:31,034 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375765622] [2022-02-15 01:18:31,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:31,035 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 154 states [2022-02-15 01:18:31,035 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:31,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 154 interpolants. [2022-02-15 01:18:31,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=23462, Unknown=0, NotChecked=0, Total=23870 [2022-02-15 01:18:31,037 INFO L87 Difference]: Start difference. First operand 220 states and 221 transitions. Second operand has 154 states, 153 states have (on average 1.3986928104575163) internal successors, (214), 152 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:39,353 INFO L93 Difference]: Finished difference Result 232 states and 236 transitions. [2022-02-15 01:18:39,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-02-15 01:18:39,354 INFO L78 Accepts]: Start accepts. Automaton has has 154 states, 153 states have (on average 1.3986928104575163) internal successors, (214), 152 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 218 [2022-02-15 01:18:39,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:39,354 INFO L225 Difference]: With dead ends: 232 [2022-02-15 01:18:39,355 INFO L226 Difference]: Without dead ends: 224 [2022-02-15 01:18:39,358 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 65 SyntacticMatches, 2 SemanticMatches, 301 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30516 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=1169, Invalid=90337, Unknown=0, NotChecked=0, Total=91506 [2022-02-15 01:18:39,358 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 273 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 23534 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 273 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 23617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 23534 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:39,358 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [273 Valid, 557 Invalid, 23617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 23534 Invalid, 0 Unknown, 0 Unchecked, 4.7s Time] [2022-02-15 01:18:39,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-15 01:18:39,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2022-02-15 01:18:39,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 218 states have (on average 1.0091743119266054) internal successors, (220), 218 states have internal predecessors, (220), 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) [2022-02-15 01:18:39,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 224 transitions. [2022-02-15 01:18:39,395 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 224 transitions. Word has length 218 [2022-02-15 01:18:39,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:39,395 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 224 transitions. [2022-02-15 01:18:39,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 154 states, 153 states have (on average 1.3986928104575163) internal successors, (214), 152 states have internal predecessors, (214), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:39,395 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 224 transitions. [2022-02-15 01:18:39,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2022-02-15 01:18:39,396 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:39,396 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 61, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:39,396 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-15 01:18:39,396 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:39,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:39,397 INFO L85 PathProgramCache]: Analyzing trace with hash -15174930, now seen corresponding path program 69 times [2022-02-15 01:18:39,397 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:39,397 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1892120724] [2022-02-15 01:18:39,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:39,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:39,457 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:39,457 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:39,482 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:39,515 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:39,516 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:39,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:39,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:39,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:39,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:44,310 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:44,310 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1892120724] [2022-02-15 01:18:44,311 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1892120724] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:44,311 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:44,311 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [156] imperfect sequences [] total 156 [2022-02-15 01:18:44,311 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [727090065] [2022-02-15 01:18:44,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:44,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 156 states [2022-02-15 01:18:44,311 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:44,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 156 interpolants. [2022-02-15 01:18:44,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=413, Invalid=24079, Unknown=0, NotChecked=0, Total=24492 [2022-02-15 01:18:44,313 INFO L87 Difference]: Start difference. First operand 223 states and 224 transitions. Second operand has 156 states, 155 states have (on average 1.4) internal successors, (217), 154 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:53,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:18:53,002 INFO L93 Difference]: Finished difference Result 235 states and 239 transitions. [2022-02-15 01:18:53,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 153 states. [2022-02-15 01:18:53,002 INFO L78 Accepts]: Start accepts. Automaton has has 156 states, 155 states have (on average 1.4) internal successors, (217), 154 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 221 [2022-02-15 01:18:53,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:18:53,003 INFO L225 Difference]: With dead ends: 235 [2022-02-15 01:18:53,003 INFO L226 Difference]: Without dead ends: 227 [2022-02-15 01:18:53,008 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 373 GetRequests, 66 SyntacticMatches, 2 SemanticMatches, 305 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31317 ImplicationChecksByTransitivity, 8.1s TimeCoverageRelationStatistics Valid=1184, Invalid=92758, Unknown=0, NotChecked=0, Total=93942 [2022-02-15 01:18:53,008 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 277 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 25160 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 277 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 25244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 25160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:18:53,008 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [277 Valid, 587 Invalid, 25244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 25160 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2022-02-15 01:18:53,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-02-15 01:18:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 226. [2022-02-15 01:18:53,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 states have internal predecessors, (223), 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) [2022-02-15 01:18:53,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 227 transitions. [2022-02-15 01:18:53,059 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 227 transitions. Word has length 221 [2022-02-15 01:18:53,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:18:53,061 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 227 transitions. [2022-02-15 01:18:53,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 156 states, 155 states have (on average 1.4) internal successors, (217), 154 states have internal predecessors, (217), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:18:53,061 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 227 transitions. [2022-02-15 01:18:53,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-02-15 01:18:53,062 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:18:53,062 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 62, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:18:53,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-15 01:18:53,062 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:18:53,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:18:53,062 INFO L85 PathProgramCache]: Analyzing trace with hash -2075322071, now seen corresponding path program 70 times [2022-02-15 01:18:53,062 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:18:53,062 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2106330396] [2022-02-15 01:18:53,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:18:53,104 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:53,124 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:53,124 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:53,150 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:53,178 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:18:53,178 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:18:53,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:18:53,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:53,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:18:53,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:18:53,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:18:57,870 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:18:57,871 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2106330396] [2022-02-15 01:18:57,871 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2106330396] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:18:57,871 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:18:57,871 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [158] imperfect sequences [] total 158 [2022-02-15 01:18:57,871 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150428189] [2022-02-15 01:18:57,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:18:57,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2022-02-15 01:18:57,871 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:18:57,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2022-02-15 01:18:57,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=418, Invalid=24704, Unknown=0, NotChecked=0, Total=25122 [2022-02-15 01:18:57,872 INFO L87 Difference]: Start difference. First operand 226 states and 227 transitions. Second operand has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 156 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:06,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:06,767 INFO L93 Difference]: Finished difference Result 238 states and 242 transitions. [2022-02-15 01:19:06,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 155 states. [2022-02-15 01:19:06,768 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 156 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 224 [2022-02-15 01:19:06,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:06,769 INFO L225 Difference]: With dead ends: 238 [2022-02-15 01:19:06,769 INFO L226 Difference]: Without dead ends: 230 [2022-02-15 01:19:06,773 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 67 SyntacticMatches, 2 SemanticMatches, 309 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32128 ImplicationChecksByTransitivity, 8.0s TimeCoverageRelationStatistics Valid=1199, Invalid=95211, Unknown=0, NotChecked=0, Total=96410 [2022-02-15 01:19:06,773 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 282 mSDsluCounter, 607 mSDsCounter, 0 mSdLazyCounter, 26826 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 617 SdHoareTripleChecker+Invalid, 26911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 26826 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:06,773 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 617 Invalid, 26911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 26826 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-15 01:19:06,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-02-15 01:19:06,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2022-02-15 01:19:06,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 224 states have (on average 1.0089285714285714) internal successors, (226), 224 states have internal predecessors, (226), 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) [2022-02-15 01:19:06,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 230 transitions. [2022-02-15 01:19:06,812 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 230 transitions. Word has length 224 [2022-02-15 01:19:06,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:06,812 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 230 transitions. [2022-02-15 01:19:06,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 157 states have (on average 1.4012738853503184) internal successors, (220), 156 states have internal predecessors, (220), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:06,812 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 230 transitions. [2022-02-15 01:19:06,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-02-15 01:19:06,813 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:06,813 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 63, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:06,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-15 01:19:06,813 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:06,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:06,813 INFO L85 PathProgramCache]: Analyzing trace with hash -836139762, now seen corresponding path program 71 times [2022-02-15 01:19:06,813 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:06,814 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [722694186] [2022-02-15 01:19:06,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:06,922 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:06,957 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:06,957 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:06,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:07,027 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:07,027 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:07,027 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:07,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:07,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:07,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:07,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:12,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:12,246 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [722694186] [2022-02-15 01:19:12,246 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [722694186] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:12,246 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:12,246 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [160] imperfect sequences [] total 160 [2022-02-15 01:19:12,246 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922001388] [2022-02-15 01:19:12,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:12,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 160 states [2022-02-15 01:19:12,247 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 160 interpolants. [2022-02-15 01:19:12,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=25337, Unknown=0, NotChecked=0, Total=25760 [2022-02-15 01:19:12,248 INFO L87 Difference]: Start difference. First operand 229 states and 230 transitions. Second operand has 160 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 158 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:20,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:20,649 INFO L93 Difference]: Finished difference Result 241 states and 245 transitions. [2022-02-15 01:19:20,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 157 states. [2022-02-15 01:19:20,649 INFO L78 Accepts]: Start accepts. Automaton has has 160 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 158 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-02-15 01:19:20,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:20,650 INFO L225 Difference]: With dead ends: 241 [2022-02-15 01:19:20,650 INFO L226 Difference]: Without dead ends: 233 [2022-02-15 01:19:20,654 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 313 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32949 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1214, Invalid=97696, Unknown=0, NotChecked=0, Total=98910 [2022-02-15 01:19:20,655 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 286 mSDsluCounter, 622 mSDsCounter, 0 mSdLazyCounter, 27860 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 286 SdHoareTripleChecker+Valid, 632 SdHoareTripleChecker+Invalid, 27946 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 27860 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:20,655 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [286 Valid, 632 Invalid, 27946 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 27860 Invalid, 0 Unknown, 0 Unchecked, 4.9s Time] [2022-02-15 01:19:20,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-02-15 01:19:20,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 232. [2022-02-15 01:19:20,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 227 states have (on average 1.0088105726872247) internal successors, (229), 227 states have internal predecessors, (229), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:20,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 233 transitions. [2022-02-15 01:19:20,724 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 233 transitions. Word has length 227 [2022-02-15 01:19:20,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:20,724 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 233 transitions. [2022-02-15 01:19:20,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 160 states, 159 states have (on average 1.4025157232704402) internal successors, (223), 158 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:20,724 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 233 transitions. [2022-02-15 01:19:20,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-02-15 01:19:20,725 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:20,725 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 64, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:20,725 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-15 01:19:20,725 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:20,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:20,725 INFO L85 PathProgramCache]: Analyzing trace with hash 400118537, now seen corresponding path program 72 times [2022-02-15 01:19:20,725 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:20,726 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [499349111] [2022-02-15 01:19:20,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:20,756 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:20,806 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:20,806 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:20,834 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:20,871 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:20,871 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:20,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:20,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:20,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:25,947 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:25,948 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [499349111] [2022-02-15 01:19:25,948 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [499349111] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:25,948 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:25,948 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [162] imperfect sequences [] total 162 [2022-02-15 01:19:25,948 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829278709] [2022-02-15 01:19:25,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:25,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 162 states [2022-02-15 01:19:25,948 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:25,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 162 interpolants. [2022-02-15 01:19:25,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=428, Invalid=25978, Unknown=0, NotChecked=0, Total=26406 [2022-02-15 01:19:25,950 INFO L87 Difference]: Start difference. First operand 232 states and 233 transitions. Second operand has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 160 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:36,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:36,131 INFO L93 Difference]: Finished difference Result 244 states and 248 transitions. [2022-02-15 01:19:36,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 159 states. [2022-02-15 01:19:36,131 INFO L78 Accepts]: Start accepts. Automaton has has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 160 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 230 [2022-02-15 01:19:36,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:36,132 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:19:36,132 INFO L226 Difference]: Without dead ends: 236 [2022-02-15 01:19:36,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 69 SyntacticMatches, 2 SemanticMatches, 317 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33780 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=1229, Invalid=100213, Unknown=0, NotChecked=0, Total=101442 [2022-02-15 01:19:36,135 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 289 mSDsluCounter, 647 mSDsCounter, 0 mSdLazyCounter, 29362 mSolverCounterSat, 87 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 289 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 29449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 87 IncrementalHoareTripleChecker+Valid, 29362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:36,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [289 Valid, 657 Invalid, 29449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [87 Valid, 29362 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2022-02-15 01:19:36,137 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-02-15 01:19:36,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2022-02-15 01:19:36,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 230 states have (on average 1.008695652173913) internal successors, (232), 230 states have internal predecessors, (232), 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) [2022-02-15 01:19:36,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 236 transitions. [2022-02-15 01:19:36,176 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 236 transitions. Word has length 230 [2022-02-15 01:19:36,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:36,176 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 236 transitions. [2022-02-15 01:19:36,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 162 states, 161 states have (on average 1.4037267080745341) internal successors, (226), 160 states have internal predecessors, (226), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:36,176 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 236 transitions. [2022-02-15 01:19:36,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 234 [2022-02-15 01:19:36,177 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:36,177 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 65, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:36,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-15 01:19:36,177 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash 426540846, now seen corresponding path program 73 times [2022-02-15 01:19:36,177 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:36,177 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509509428] [2022-02-15 01:19:36,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:36,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:36,247 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:36,247 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:36,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:36,314 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:36,314 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:36,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:36,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:36,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:36,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:36,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:41,897 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:41,898 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509509428] [2022-02-15 01:19:41,898 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509509428] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:41,898 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:41,898 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [164] imperfect sequences [] total 164 [2022-02-15 01:19:41,898 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450108701] [2022-02-15 01:19:41,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:41,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 164 states [2022-02-15 01:19:41,898 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:41,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 164 interpolants. [2022-02-15 01:19:41,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=433, Invalid=26627, Unknown=0, NotChecked=0, Total=27060 [2022-02-15 01:19:41,900 INFO L87 Difference]: Start difference. First operand 235 states and 236 transitions. Second operand has 164 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:53,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:19:53,191 INFO L93 Difference]: Finished difference Result 247 states and 251 transitions. [2022-02-15 01:19:53,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 161 states. [2022-02-15 01:19:53,191 INFO L78 Accepts]: Start accepts. Automaton has has 164 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 233 [2022-02-15 01:19:53,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:19:53,192 INFO L225 Difference]: With dead ends: 247 [2022-02-15 01:19:53,192 INFO L226 Difference]: Without dead ends: 239 [2022-02-15 01:19:53,196 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 393 GetRequests, 70 SyntacticMatches, 2 SemanticMatches, 321 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34621 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=1244, Invalid=102762, Unknown=0, NotChecked=0, Total=104006 [2022-02-15 01:19:53,196 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 293 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 29521 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 29609 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 29521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:19:53,196 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [293 Valid, 652 Invalid, 29609 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 29521 Invalid, 0 Unknown, 0 Unchecked, 6.8s Time] [2022-02-15 01:19:53,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2022-02-15 01:19:53,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 238. [2022-02-15 01:19:53,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 233 states have (on average 1.0085836909871244) internal successors, (235), 233 states have internal predecessors, (235), 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) [2022-02-15 01:19:53,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 239 transitions. [2022-02-15 01:19:53,238 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 239 transitions. Word has length 233 [2022-02-15 01:19:53,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:19:53,238 INFO L470 AbstractCegarLoop]: Abstraction has 238 states and 239 transitions. [2022-02-15 01:19:53,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 164 states, 163 states have (on average 1.4049079754601228) internal successors, (229), 162 states have internal predecessors, (229), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:19:53,238 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 239 transitions. [2022-02-15 01:19:53,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2022-02-15 01:19:53,239 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:19:53,239 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 66, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:19:53,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-15 01:19:53,239 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:19:53,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:19:53,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1594533097, now seen corresponding path program 74 times [2022-02-15 01:19:53,239 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:19:53,239 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1006861546] [2022-02-15 01:19:53,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:19:53,278 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:53,319 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:53,319 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:53,355 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:53,404 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:19:53,404 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:19:53,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:19:53,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:53,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:19:53,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:19:53,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:19:59,022 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:19:59,022 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1006861546] [2022-02-15 01:19:59,022 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1006861546] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:19:59,022 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:19:59,022 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [166] imperfect sequences [] total 166 [2022-02-15 01:19:59,023 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51701177] [2022-02-15 01:19:59,023 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:19:59,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 166 states [2022-02-15 01:19:59,023 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:19:59,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 166 interpolants. [2022-02-15 01:19:59,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=438, Invalid=27284, Unknown=0, NotChecked=0, Total=27722 [2022-02-15 01:19:59,026 INFO L87 Difference]: Start difference. First operand 238 states and 239 transitions. Second operand has 166 states, 165 states have (on average 1.406060606060606) internal successors, (232), 164 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:08,302 INFO L93 Difference]: Finished difference Result 250 states and 254 transitions. [2022-02-15 01:20:08,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 163 states. [2022-02-15 01:20:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 166 states, 165 states have (on average 1.406060606060606) internal successors, (232), 164 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 236 [2022-02-15 01:20:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:08,303 INFO L225 Difference]: With dead ends: 250 [2022-02-15 01:20:08,303 INFO L226 Difference]: Without dead ends: 242 [2022-02-15 01:20:08,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 70 SyntacticMatches, 3 SemanticMatches, 325 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35474 ImplicationChecksByTransitivity, 9.1s TimeCoverageRelationStatistics Valid=1259, Invalid=105343, Unknown=0, NotChecked=0, Total=106602 [2022-02-15 01:20:08,306 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 297 mSDsluCounter, 612 mSDsCounter, 0 mSdLazyCounter, 28527 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 297 SdHoareTripleChecker+Valid, 622 SdHoareTripleChecker+Invalid, 28616 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 28527 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:08,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [297 Valid, 622 Invalid, 28616 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 28527 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2022-02-15 01:20:08,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2022-02-15 01:20:08,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2022-02-15 01:20:08,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 236 states have (on average 1.0084745762711864) internal successors, (238), 236 states have internal predecessors, (238), 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) [2022-02-15 01:20:08,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 242 transitions. [2022-02-15 01:20:08,349 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 242 transitions. Word has length 236 [2022-02-15 01:20:08,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:08,349 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 242 transitions. [2022-02-15 01:20:08,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 166 states, 165 states have (on average 1.406060606060606) internal successors, (232), 164 states have internal predecessors, (232), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:08,350 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 242 transitions. [2022-02-15 01:20:08,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-02-15 01:20:08,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:08,354 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 67, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:08,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-15 01:20:08,354 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:08,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:08,354 INFO L85 PathProgramCache]: Analyzing trace with hash -573349554, now seen corresponding path program 75 times [2022-02-15 01:20:08,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:08,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1974986027] [2022-02-15 01:20:08,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:08,408 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:08,437 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:08,437 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:08,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:08,517 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:08,518 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:08,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:08,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:08,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:08,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:08,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:13,460 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:13,460 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1974986027] [2022-02-15 01:20:13,460 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1974986027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:13,461 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:13,461 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [168] imperfect sequences [] total 168 [2022-02-15 01:20:13,461 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006533103] [2022-02-15 01:20:13,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:13,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 168 states [2022-02-15 01:20:13,461 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:13,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 168 interpolants. [2022-02-15 01:20:13,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=443, Invalid=27949, Unknown=0, NotChecked=0, Total=28392 [2022-02-15 01:20:13,469 INFO L87 Difference]: Start difference. First operand 241 states and 242 transitions. Second operand has 168 states, 167 states have (on average 1.407185628742515) internal successors, (235), 166 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:22,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:22,301 INFO L93 Difference]: Finished difference Result 253 states and 257 transitions. [2022-02-15 01:20:22,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 165 states. [2022-02-15 01:20:22,301 INFO L78 Accepts]: Start accepts. Automaton has has 168 states, 167 states have (on average 1.407185628742515) internal successors, (235), 166 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-02-15 01:20:22,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:22,302 INFO L225 Difference]: With dead ends: 253 [2022-02-15 01:20:22,302 INFO L226 Difference]: Without dead ends: 245 [2022-02-15 01:20:22,306 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 403 GetRequests, 71 SyntacticMatches, 3 SemanticMatches, 329 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36335 ImplicationChecksByTransitivity, 8.3s TimeCoverageRelationStatistics Valid=1274, Invalid=107956, Unknown=0, NotChecked=0, Total=109230 [2022-02-15 01:20:22,306 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 301 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 30301 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 301 SdHoareTripleChecker+Valid, 652 SdHoareTripleChecker+Invalid, 30391 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 30301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:22,306 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [301 Valid, 652 Invalid, 30391 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 30301 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2022-02-15 01:20:22,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2022-02-15 01:20:22,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 244. [2022-02-15 01:20:22,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 239 states have (on average 1.00836820083682) internal successors, (241), 239 states have internal predecessors, (241), 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) [2022-02-15 01:20:22,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 245 transitions. [2022-02-15 01:20:22,350 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 245 transitions. Word has length 239 [2022-02-15 01:20:22,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:22,350 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 245 transitions. [2022-02-15 01:20:22,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 168 states, 167 states have (on average 1.407185628742515) internal successors, (235), 166 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:22,350 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 245 transitions. [2022-02-15 01:20:22,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2022-02-15 01:20:22,351 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:22,351 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 68, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:22,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-15 01:20:22,351 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:22,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:22,351 INFO L85 PathProgramCache]: Analyzing trace with hash -542175543, now seen corresponding path program 76 times [2022-02-15 01:20:22,351 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:22,351 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635078015] [2022-02-15 01:20:22,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:22,389 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:22,414 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:22,414 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:22,433 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:22,466 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:22,466 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:22,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:22,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:22,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:22,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:22,527 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:28,049 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:28,049 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635078015] [2022-02-15 01:20:28,049 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [635078015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:28,050 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:28,050 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [170] imperfect sequences [] total 170 [2022-02-15 01:20:28,050 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522817196] [2022-02-15 01:20:28,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:28,050 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 170 states [2022-02-15 01:20:28,050 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:28,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 170 interpolants. [2022-02-15 01:20:28,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=448, Invalid=28622, Unknown=0, NotChecked=0, Total=29070 [2022-02-15 01:20:28,052 INFO L87 Difference]: Start difference. First operand 244 states and 245 transitions. Second operand has 170 states, 169 states have (on average 1.4082840236686391) internal successors, (238), 168 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:41,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:41,339 INFO L93 Difference]: Finished difference Result 256 states and 260 transitions. [2022-02-15 01:20:41,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2022-02-15 01:20:41,339 INFO L78 Accepts]: Start accepts. Automaton has has 170 states, 169 states have (on average 1.4082840236686391) internal successors, (238), 168 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 242 [2022-02-15 01:20:41,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:41,340 INFO L225 Difference]: With dead ends: 256 [2022-02-15 01:20:41,340 INFO L226 Difference]: Without dead ends: 248 [2022-02-15 01:20:41,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 72 SyntacticMatches, 3 SemanticMatches, 333 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37206 ImplicationChecksByTransitivity, 10.4s TimeCoverageRelationStatistics Valid=1289, Invalid=110601, Unknown=0, NotChecked=0, Total=111890 [2022-02-15 01:20:41,345 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 305 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 33058 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 33149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 33058 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:41,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [305 Valid, 702 Invalid, 33149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 33058 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 01:20:41,345 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2022-02-15 01:20:41,388 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2022-02-15 01:20:41,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 242 states have (on average 1.0082644628099173) internal successors, (244), 242 states have internal predecessors, (244), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 248 transitions. [2022-02-15 01:20:41,388 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 248 transitions. Word has length 242 [2022-02-15 01:20:41,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:41,389 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 248 transitions. [2022-02-15 01:20:41,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 170 states, 169 states have (on average 1.4082840236686391) internal successors, (238), 168 states have internal predecessors, (238), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:41,389 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 248 transitions. [2022-02-15 01:20:41,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2022-02-15 01:20:41,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:41,389 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 69, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:41,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-15 01:20:41,390 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:41,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:41,390 INFO L85 PathProgramCache]: Analyzing trace with hash 449850222, now seen corresponding path program 77 times [2022-02-15 01:20:41,390 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:41,390 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1822658096] [2022-02-15 01:20:41,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:41,425 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:41,445 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:41,445 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:41,483 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:41,520 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:41,520 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:41,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:41,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:41,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:20:47,055 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:20:47,055 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1822658096] [2022-02-15 01:20:47,055 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1822658096] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:20:47,055 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:20:47,055 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [172] imperfect sequences [] total 172 [2022-02-15 01:20:47,055 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461024468] [2022-02-15 01:20:47,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:20:47,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 172 states [2022-02-15 01:20:47,056 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:20:47,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 172 interpolants. [2022-02-15 01:20:47,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=453, Invalid=29303, Unknown=0, NotChecked=0, Total=29756 [2022-02-15 01:20:47,057 INFO L87 Difference]: Start difference. First operand 247 states and 248 transitions. Second operand has 172 states, 171 states have (on average 1.409356725146199) internal successors, (241), 170 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:56,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:20:56,569 INFO L93 Difference]: Finished difference Result 259 states and 263 transitions. [2022-02-15 01:20:56,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 169 states. [2022-02-15 01:20:56,569 INFO L78 Accepts]: Start accepts. Automaton has has 172 states, 171 states have (on average 1.409356725146199) internal successors, (241), 170 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 245 [2022-02-15 01:20:56,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:20:56,570 INFO L225 Difference]: With dead ends: 259 [2022-02-15 01:20:56,570 INFO L226 Difference]: Without dead ends: 251 [2022-02-15 01:20:56,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 413 GetRequests, 74 SyntacticMatches, 2 SemanticMatches, 337 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38085 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1304, Invalid=113278, Unknown=0, NotChecked=0, Total=114582 [2022-02-15 01:20:56,575 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 310 mSDsluCounter, 627 mSDsCounter, 0 mSdLazyCounter, 30354 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 310 SdHoareTripleChecker+Valid, 637 SdHoareTripleChecker+Invalid, 30446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 30354 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:20:56,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [310 Valid, 637 Invalid, 30446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 30354 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2022-02-15 01:20:56,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2022-02-15 01:20:56,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 250. [2022-02-15 01:20:56,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 250 states, 245 states have (on average 1.0081632653061225) internal successors, (247), 245 states have internal predecessors, (247), 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) [2022-02-15 01:20:56,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 250 states to 250 states and 251 transitions. [2022-02-15 01:20:56,620 INFO L78 Accepts]: Start accepts. Automaton has 250 states and 251 transitions. Word has length 245 [2022-02-15 01:20:56,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:20:56,621 INFO L470 AbstractCegarLoop]: Abstraction has 250 states and 251 transitions. [2022-02-15 01:20:56,621 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 172 states, 171 states have (on average 1.409356725146199) internal successors, (241), 170 states have internal predecessors, (241), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:20:56,621 INFO L276 IsEmpty]: Start isEmpty. Operand 250 states and 251 transitions. [2022-02-15 01:20:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2022-02-15 01:20:56,621 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:20:56,621 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 70, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:20:56,622 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-15 01:20:56,622 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:20:56,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:20:56,622 INFO L85 PathProgramCache]: Analyzing trace with hash 219451561, now seen corresponding path program 78 times [2022-02-15 01:20:56,622 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:20:56,622 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1238036875] [2022-02-15 01:20:56,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:20:56,658 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:56,684 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:56,685 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:56,704 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:56,730 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:20:56,730 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:20:56,730 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:20:56,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:56,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:20:56,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:20:56,806 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:02,498 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:02,499 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1238036875] [2022-02-15 01:21:02,499 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1238036875] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:02,499 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:02,499 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [174] imperfect sequences [] total 174 [2022-02-15 01:21:02,499 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374232833] [2022-02-15 01:21:02,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:02,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 174 states [2022-02-15 01:21:02,499 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:02,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 174 interpolants. [2022-02-15 01:21:02,513 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=29992, Unknown=0, NotChecked=0, Total=30450 [2022-02-15 01:21:02,513 INFO L87 Difference]: Start difference. First operand 250 states and 251 transitions. Second operand has 174 states, 173 states have (on average 1.4104046242774566) internal successors, (244), 172 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:15,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:15,170 INFO L93 Difference]: Finished difference Result 262 states and 266 transitions. [2022-02-15 01:21:15,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 171 states. [2022-02-15 01:21:15,171 INFO L78 Accepts]: Start accepts. Automaton has has 174 states, 173 states have (on average 1.4104046242774566) internal successors, (244), 172 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 248 [2022-02-15 01:21:15,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:15,172 INFO L225 Difference]: With dead ends: 262 [2022-02-15 01:21:15,172 INFO L226 Difference]: Without dead ends: 254 [2022-02-15 01:21:15,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 418 GetRequests, 76 SyntacticMatches, 1 SemanticMatches, 341 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38976 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=1319, Invalid=115987, Unknown=0, NotChecked=0, Total=117306 [2022-02-15 01:21:15,177 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 314 mSDsluCounter, 652 mSDsCounter, 0 mSdLazyCounter, 31950 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 314 SdHoareTripleChecker+Valid, 662 SdHoareTripleChecker+Invalid, 32043 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 31950 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:15,177 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [314 Valid, 662 Invalid, 32043 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 31950 Invalid, 0 Unknown, 0 Unchecked, 7.4s Time] [2022-02-15 01:21:15,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2022-02-15 01:21:15,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2022-02-15 01:21:15,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 248 states have (on average 1.0080645161290323) internal successors, (250), 248 states have internal predecessors, (250), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:15,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 254 transitions. [2022-02-15 01:21:15,254 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 254 transitions. Word has length 248 [2022-02-15 01:21:15,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:15,254 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 254 transitions. [2022-02-15 01:21:15,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 174 states, 173 states have (on average 1.4104046242774566) internal successors, (244), 172 states have internal predecessors, (244), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:15,254 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 254 transitions. [2022-02-15 01:21:15,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-02-15 01:21:15,255 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:15,255 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 71, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:15,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-15 01:21:15,256 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:15,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:15,256 INFO L85 PathProgramCache]: Analyzing trace with hash -229319282, now seen corresponding path program 79 times [2022-02-15 01:21:15,256 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:15,256 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [89519846] [2022-02-15 01:21:15,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:15,324 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:15,365 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:15,365 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:21:15,393 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:15,458 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:15,458 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:21:15,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:15,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:15,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:15,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:15,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:21,339 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:21,339 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [89519846] [2022-02-15 01:21:21,339 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [89519846] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:21,339 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:21,339 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [176] imperfect sequences [] total 176 [2022-02-15 01:21:21,339 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102215488] [2022-02-15 01:21:21,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:21,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 176 states [2022-02-15 01:21:21,340 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:21,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 176 interpolants. [2022-02-15 01:21:21,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=463, Invalid=30689, Unknown=0, NotChecked=0, Total=31152 [2022-02-15 01:21:21,342 INFO L87 Difference]: Start difference. First operand 253 states and 254 transitions. Second operand has 176 states, 175 states have (on average 1.4114285714285715) internal successors, (247), 174 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:31,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:31,990 INFO L93 Difference]: Finished difference Result 265 states and 269 transitions. [2022-02-15 01:21:31,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 173 states. [2022-02-15 01:21:31,991 INFO L78 Accepts]: Start accepts. Automaton has has 176 states, 175 states have (on average 1.4114285714285715) internal successors, (247), 174 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-02-15 01:21:31,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:31,991 INFO L225 Difference]: With dead ends: 265 [2022-02-15 01:21:31,991 INFO L226 Difference]: Without dead ends: 257 [2022-02-15 01:21:31,995 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 76 SyntacticMatches, 2 SemanticMatches, 345 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39877 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=1334, Invalid=118728, Unknown=0, NotChecked=0, Total=120062 [2022-02-15 01:21:31,995 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 318 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 34312 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 318 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 34406 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 34312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:31,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [318 Valid, 702 Invalid, 34406 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 34312 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-02-15 01:21:31,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2022-02-15 01:21:32,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2022-02-15 01:21:32,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 251 states have (on average 1.0079681274900398) internal successors, (253), 251 states have internal predecessors, (253), 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) [2022-02-15 01:21:32,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 257 transitions. [2022-02-15 01:21:32,042 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 257 transitions. Word has length 251 [2022-02-15 01:21:32,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:32,042 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 257 transitions. [2022-02-15 01:21:32,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 176 states, 175 states have (on average 1.4114285714285715) internal successors, (247), 174 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:32,043 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 257 transitions. [2022-02-15 01:21:32,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2022-02-15 01:21:32,043 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:32,043 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 72, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:32,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-02-15 01:21:32,043 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:32,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:32,044 INFO L85 PathProgramCache]: Analyzing trace with hash 671689353, now seen corresponding path program 80 times [2022-02-15 01:21:32,044 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:32,044 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61834948] [2022-02-15 01:21:32,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:32,078 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:32,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:32,104 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:21:32,128 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:32,153 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:32,153 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:21:32,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:32,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:32,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:32,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:32,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:37,613 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:37,613 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61834948] [2022-02-15 01:21:37,613 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [61834948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:37,613 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:37,614 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [178] imperfect sequences [] total 178 [2022-02-15 01:21:37,614 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671545795] [2022-02-15 01:21:37,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:37,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2022-02-15 01:21:37,614 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:37,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2022-02-15 01:21:37,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=468, Invalid=31394, Unknown=0, NotChecked=0, Total=31862 [2022-02-15 01:21:37,616 INFO L87 Difference]: Start difference. First operand 256 states and 257 transitions. Second operand has 178 states, 177 states have (on average 1.4124293785310735) internal successors, (250), 176 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:48,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:21:48,255 INFO L93 Difference]: Finished difference Result 268 states and 272 transitions. [2022-02-15 01:21:48,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 175 states. [2022-02-15 01:21:48,255 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 177 states have (on average 1.4124293785310735) internal successors, (250), 176 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 254 [2022-02-15 01:21:48,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:21:48,256 INFO L225 Difference]: With dead ends: 268 [2022-02-15 01:21:48,256 INFO L226 Difference]: Without dead ends: 260 [2022-02-15 01:21:48,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 76 SyntacticMatches, 3 SemanticMatches, 349 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40790 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1349, Invalid=121501, Unknown=0, NotChecked=0, Total=122850 [2022-02-15 01:21:48,261 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 321 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 34731 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 702 SdHoareTripleChecker+Invalid, 34826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 34731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:21:48,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 702 Invalid, 34826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 34731 Invalid, 0 Unknown, 0 Unchecked, 6.3s Time] [2022-02-15 01:21:48,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2022-02-15 01:21:48,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2022-02-15 01:21:48,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 254 states have (on average 1.0078740157480315) internal successors, (256), 254 states have internal predecessors, (256), 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) [2022-02-15 01:21:48,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 260 transitions. [2022-02-15 01:21:48,311 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 260 transitions. Word has length 254 [2022-02-15 01:21:48,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:21:48,311 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 260 transitions. [2022-02-15 01:21:48,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 177 states have (on average 1.4124293785310735) internal successors, (250), 176 states have internal predecessors, (250), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:21:48,311 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 260 transitions. [2022-02-15 01:21:48,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2022-02-15 01:21:48,312 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:21:48,312 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 73, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:21:48,312 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-02-15 01:21:48,312 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:21:48,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:21:48,312 INFO L85 PathProgramCache]: Analyzing trace with hash -925665362, now seen corresponding path program 81 times [2022-02-15 01:21:48,312 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:21:48,312 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279755593] [2022-02-15 01:21:48,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:21:48,351 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:48,394 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:48,394 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:21:48,423 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:48,470 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:21:48,470 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:21:48,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:21:48,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:48,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:21:48,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:21:48,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:21:56,291 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:21:56,291 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279755593] [2022-02-15 01:21:56,291 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [279755593] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:21:56,291 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:21:56,291 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [180] imperfect sequences [] total 180 [2022-02-15 01:21:56,291 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269231153] [2022-02-15 01:21:56,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:21:56,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 180 states [2022-02-15 01:21:56,292 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:21:56,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 180 interpolants. [2022-02-15 01:21:56,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=473, Invalid=32107, Unknown=0, NotChecked=0, Total=32580 [2022-02-15 01:21:56,294 INFO L87 Difference]: Start difference. First operand 259 states and 260 transitions. Second operand has 180 states, 179 states have (on average 1.4134078212290502) internal successors, (253), 178 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:08,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:08,105 INFO L93 Difference]: Finished difference Result 271 states and 275 transitions. [2022-02-15 01:22:08,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 177 states. [2022-02-15 01:22:08,106 INFO L78 Accepts]: Start accepts. Automaton has has 180 states, 179 states have (on average 1.4134078212290502) internal successors, (253), 178 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 257 [2022-02-15 01:22:08,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:08,107 INFO L225 Difference]: With dead ends: 271 [2022-02-15 01:22:08,107 INFO L226 Difference]: Without dead ends: 263 [2022-02-15 01:22:08,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 433 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 353 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41709 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=1364, Invalid=124306, Unknown=0, NotChecked=0, Total=125670 [2022-02-15 01:22:08,111 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 325 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 33382 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 33478 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 33382 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:08,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [325 Valid, 667 Invalid, 33478 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 33382 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 01:22:08,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-02-15 01:22:08,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 262. [2022-02-15 01:22:08,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 257 states have (on average 1.0077821011673151) internal successors, (259), 257 states have internal predecessors, (259), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:08,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 263 transitions. [2022-02-15 01:22:08,161 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 263 transitions. Word has length 257 [2022-02-15 01:22:08,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:08,161 INFO L470 AbstractCegarLoop]: Abstraction has 262 states and 263 transitions. [2022-02-15 01:22:08,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 180 states, 179 states have (on average 1.4134078212290502) internal successors, (253), 178 states have internal predecessors, (253), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:08,161 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 263 transitions. [2022-02-15 01:22:08,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2022-02-15 01:22:08,162 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:08,162 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 74, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:08,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-02-15 01:22:08,162 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:08,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:08,162 INFO L85 PathProgramCache]: Analyzing trace with hash 517659753, now seen corresponding path program 82 times [2022-02-15 01:22:08,162 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:08,162 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139331935] [2022-02-15 01:22:08,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:08,202 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:08,228 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:08,228 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:22:08,267 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:08,301 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:08,301 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:22:08,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:08,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:08,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:08,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:08,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:14,916 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:14,916 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139331935] [2022-02-15 01:22:14,916 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [139331935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:14,916 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:14,917 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [182] imperfect sequences [] total 182 [2022-02-15 01:22:14,917 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955003266] [2022-02-15 01:22:14,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:14,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2022-02-15 01:22:14,917 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:14,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2022-02-15 01:22:14,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=478, Invalid=32828, Unknown=0, NotChecked=0, Total=33306 [2022-02-15 01:22:14,919 INFO L87 Difference]: Start difference. First operand 262 states and 263 transitions. Second operand has 182 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 180 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:29,699 INFO L93 Difference]: Finished difference Result 274 states and 278 transitions. [2022-02-15 01:22:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 179 states. [2022-02-15 01:22:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 180 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 260 [2022-02-15 01:22:29,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:29,700 INFO L225 Difference]: With dead ends: 274 [2022-02-15 01:22:29,700 INFO L226 Difference]: Without dead ends: 266 [2022-02-15 01:22:29,705 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 78 SyntacticMatches, 3 SemanticMatches, 357 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42642 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1379, Invalid=127143, Unknown=0, NotChecked=0, Total=128522 [2022-02-15 01:22:29,705 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 329 mSDsluCounter, 657 mSDsCounter, 0 mSdLazyCounter, 33780 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 329 SdHoareTripleChecker+Valid, 667 SdHoareTripleChecker+Invalid, 33877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 33780 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:29,705 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [329 Valid, 667 Invalid, 33877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 33780 Invalid, 0 Unknown, 0 Unchecked, 8.5s Time] [2022-02-15 01:22:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-02-15 01:22:29,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 265. [2022-02-15 01:22:29,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 265 states, 260 states have (on average 1.0076923076923077) internal successors, (262), 260 states have internal predecessors, (262), 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) [2022-02-15 01:22:29,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 265 states to 265 states and 266 transitions. [2022-02-15 01:22:29,772 INFO L78 Accepts]: Start accepts. Automaton has 265 states and 266 transitions. Word has length 260 [2022-02-15 01:22:29,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:29,772 INFO L470 AbstractCegarLoop]: Abstraction has 265 states and 266 transitions. [2022-02-15 01:22:29,772 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 181 states have (on average 1.4143646408839778) internal successors, (256), 180 states have internal predecessors, (256), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:29,773 INFO L276 IsEmpty]: Start isEmpty. Operand 265 states and 266 transitions. [2022-02-15 01:22:29,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-02-15 01:22:29,773 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:29,773 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 75, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:29,773 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-02-15 01:22:29,773 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:29,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:29,774 INFO L85 PathProgramCache]: Analyzing trace with hash 1698560462, now seen corresponding path program 83 times [2022-02-15 01:22:29,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:29,774 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980624535] [2022-02-15 01:22:29,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:29,808 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:29,833 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:29,833 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:22:29,852 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:29,876 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:29,877 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:22:29,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:29,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:29,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:29,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:22:37,010 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:22:37,010 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980624535] [2022-02-15 01:22:37,010 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980624535] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:22:37,010 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:22:37,010 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [184] imperfect sequences [] total 184 [2022-02-15 01:22:37,010 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672853899] [2022-02-15 01:22:37,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:22:37,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2022-02-15 01:22:37,011 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:22:37,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2022-02-15 01:22:37,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=483, Invalid=33557, Unknown=0, NotChecked=0, Total=34040 [2022-02-15 01:22:37,014 INFO L87 Difference]: Start difference. First operand 265 states and 266 transitions. Second operand has 184 states, 183 states have (on average 1.4153005464480874) internal successors, (259), 182 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:51,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:22:51,641 INFO L93 Difference]: Finished difference Result 277 states and 281 transitions. [2022-02-15 01:22:51,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 181 states. [2022-02-15 01:22:51,642 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 183 states have (on average 1.4153005464480874) internal successors, (259), 182 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-02-15 01:22:51,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:22:51,645 INFO L225 Difference]: With dead ends: 277 [2022-02-15 01:22:51,645 INFO L226 Difference]: Without dead ends: 269 [2022-02-15 01:22:51,651 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 79 SyntacticMatches, 3 SemanticMatches, 361 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43583 ImplicationChecksByTransitivity, 12.5s TimeCoverageRelationStatistics Valid=1394, Invalid=130012, Unknown=0, NotChecked=0, Total=131406 [2022-02-15 01:22:51,651 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 333 mSDsluCounter, 717 mSDsCounter, 0 mSdLazyCounter, 37274 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 333 SdHoareTripleChecker+Valid, 727 SdHoareTripleChecker+Invalid, 37372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 37274 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:22:51,651 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [333 Valid, 727 Invalid, 37372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 37274 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2022-02-15 01:22:51,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2022-02-15 01:22:51,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 268. [2022-02-15 01:22:51,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 263 states have (on average 1.0076045627376427) internal successors, (265), 263 states have internal predecessors, (265), 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) [2022-02-15 01:22:51,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 269 transitions. [2022-02-15 01:22:51,745 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 269 transitions. Word has length 263 [2022-02-15 01:22:51,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:22:51,746 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 269 transitions. [2022-02-15 01:22:51,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 183 states have (on average 1.4153005464480874) internal successors, (259), 182 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:22:51,746 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 269 transitions. [2022-02-15 01:22:51,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2022-02-15 01:22:51,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:22:51,747 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 76, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:22:51,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-02-15 01:22:51,747 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:22:51,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:22:51,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1834460745, now seen corresponding path program 84 times [2022-02-15 01:22:51,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:22:51,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1177069540] [2022-02-15 01:22:51,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:22:51,775 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:51,804 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:51,805 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:22:51,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:51,859 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:22:51,859 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:22:51,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:22:51,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:51,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:22:51,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:22:51,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:00,527 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:00,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1177069540] [2022-02-15 01:23:00,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1177069540] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:00,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:00,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [186] imperfect sequences [] total 186 [2022-02-15 01:23:00,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004593234] [2022-02-15 01:23:00,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:00,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 186 states [2022-02-15 01:23:00,528 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:00,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 186 interpolants. [2022-02-15 01:23:00,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=488, Invalid=34294, Unknown=0, NotChecked=0, Total=34782 [2022-02-15 01:23:00,530 INFO L87 Difference]: Start difference. First operand 268 states and 269 transitions. Second operand has 186 states, 185 states have (on average 1.4162162162162162) internal successors, (262), 184 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:12,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:12,331 INFO L93 Difference]: Finished difference Result 280 states and 284 transitions. [2022-02-15 01:23:12,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 183 states. [2022-02-15 01:23:12,331 INFO L78 Accepts]: Start accepts. Automaton has has 186 states, 185 states have (on average 1.4162162162162162) internal successors, (262), 184 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 266 [2022-02-15 01:23:12,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:12,332 INFO L225 Difference]: With dead ends: 280 [2022-02-15 01:23:12,332 INFO L226 Difference]: Without dead ends: 272 [2022-02-15 01:23:12,336 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 448 GetRequests, 80 SyntacticMatches, 3 SemanticMatches, 365 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44534 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1409, Invalid=132913, Unknown=0, NotChecked=0, Total=134322 [2022-02-15 01:23:12,336 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 338 mSDsluCounter, 727 mSDsCounter, 0 mSdLazyCounter, 38229 mSolverCounterSat, 99 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 338 SdHoareTripleChecker+Valid, 737 SdHoareTripleChecker+Invalid, 38328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 99 IncrementalHoareTripleChecker+Valid, 38229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:12,336 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [338 Valid, 737 Invalid, 38328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [99 Valid, 38229 Invalid, 0 Unknown, 0 Unchecked, 6.9s Time] [2022-02-15 01:23:12,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2022-02-15 01:23:12,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 271. [2022-02-15 01:23:12,391 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 266 states have (on average 1.0075187969924813) internal successors, (268), 266 states have internal predecessors, (268), 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) [2022-02-15 01:23:12,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 272 transitions. [2022-02-15 01:23:12,391 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 272 transitions. Word has length 266 [2022-02-15 01:23:12,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:12,392 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 272 transitions. [2022-02-15 01:23:12,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 186 states, 185 states have (on average 1.4162162162162162) internal successors, (262), 184 states have internal predecessors, (262), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:12,392 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 272 transitions. [2022-02-15 01:23:12,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 270 [2022-02-15 01:23:12,393 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:12,393 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 77, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:12,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-02-15 01:23:12,393 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:12,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:12,393 INFO L85 PathProgramCache]: Analyzing trace with hash 285631470, now seen corresponding path program 85 times [2022-02-15 01:23:12,393 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:12,393 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1031953216] [2022-02-15 01:23:12,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:12,429 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:12,448 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:12,448 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:23:12,468 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:12,502 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:12,503 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:23:12,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:12,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:12,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:12,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:12,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:19,524 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:19,524 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1031953216] [2022-02-15 01:23:19,524 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1031953216] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:19,524 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:19,524 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [188] imperfect sequences [] total 188 [2022-02-15 01:23:19,524 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804894318] [2022-02-15 01:23:19,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:19,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 188 states [2022-02-15 01:23:19,525 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:19,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 188 interpolants. [2022-02-15 01:23:19,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=493, Invalid=35039, Unknown=0, NotChecked=0, Total=35532 [2022-02-15 01:23:19,526 INFO L87 Difference]: Start difference. First operand 271 states and 272 transitions. Second operand has 188 states, 187 states have (on average 1.4171122994652405) internal successors, (265), 186 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:32,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:32,942 INFO L93 Difference]: Finished difference Result 283 states and 287 transitions. [2022-02-15 01:23:32,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 185 states. [2022-02-15 01:23:32,942 INFO L78 Accepts]: Start accepts. Automaton has has 188 states, 187 states have (on average 1.4171122994652405) internal successors, (265), 186 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 269 [2022-02-15 01:23:32,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:32,943 INFO L225 Difference]: With dead ends: 283 [2022-02-15 01:23:32,943 INFO L226 Difference]: Without dead ends: 275 [2022-02-15 01:23:32,948 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 453 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 369 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45493 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=1424, Invalid=135846, Unknown=0, NotChecked=0, Total=137270 [2022-02-15 01:23:32,948 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 341 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 39460 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 341 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 39560 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 39460 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:32,948 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [341 Valid, 752 Invalid, 39560 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 39460 Invalid, 0 Unknown, 0 Unchecked, 8.0s Time] [2022-02-15 01:23:32,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2022-02-15 01:23:33,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 274. [2022-02-15 01:23:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 274 states, 269 states have (on average 1.0074349442379182) internal successors, (271), 269 states have internal predecessors, (271), 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) [2022-02-15 01:23:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 274 states to 274 states and 275 transitions. [2022-02-15 01:23:33,005 INFO L78 Accepts]: Start accepts. Automaton has 274 states and 275 transitions. Word has length 269 [2022-02-15 01:23:33,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:33,005 INFO L470 AbstractCegarLoop]: Abstraction has 274 states and 275 transitions. [2022-02-15 01:23:33,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 188 states, 187 states have (on average 1.4171122994652405) internal successors, (265), 186 states have internal predecessors, (265), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:33,005 INFO L276 IsEmpty]: Start isEmpty. Operand 274 states and 275 transitions. [2022-02-15 01:23:33,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 273 [2022-02-15 01:23:33,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:33,006 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 78, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:33,006 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-02-15 01:23:33,006 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:33,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:33,007 INFO L85 PathProgramCache]: Analyzing trace with hash -53639127, now seen corresponding path program 86 times [2022-02-15 01:23:33,007 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:33,007 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876912434] [2022-02-15 01:23:33,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:33,036 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:33,061 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:33,062 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:23:33,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:33,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:33,121 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:23:33,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:33,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:33,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:33,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:33,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:23:40,396 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:23:40,397 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876912434] [2022-02-15 01:23:40,397 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876912434] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:23:40,397 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:23:40,397 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [190] imperfect sequences [] total 190 [2022-02-15 01:23:40,397 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726775703] [2022-02-15 01:23:40,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:23:40,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 190 states [2022-02-15 01:23:40,398 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:23:40,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 190 interpolants. [2022-02-15 01:23:40,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=35792, Unknown=0, NotChecked=0, Total=36290 [2022-02-15 01:23:40,400 INFO L87 Difference]: Start difference. First operand 274 states and 275 transitions. Second operand has 190 states, 189 states have (on average 1.417989417989418) internal successors, (268), 188 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:53,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:23:53,836 INFO L93 Difference]: Finished difference Result 286 states and 290 transitions. [2022-02-15 01:23:53,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-02-15 01:23:53,837 INFO L78 Accepts]: Start accepts. Automaton has has 190 states, 189 states have (on average 1.417989417989418) internal successors, (268), 188 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 272 [2022-02-15 01:23:53,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:23:53,838 INFO L225 Difference]: With dead ends: 286 [2022-02-15 01:23:53,838 INFO L226 Difference]: Without dead ends: 278 [2022-02-15 01:23:53,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 82 SyntacticMatches, 3 SemanticMatches, 373 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46466 ImplicationChecksByTransitivity, 12.4s TimeCoverageRelationStatistics Valid=1439, Invalid=138811, Unknown=0, NotChecked=0, Total=140250 [2022-02-15 01:23:53,842 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 346 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 36969 mSolverCounterSat, 101 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 37070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 101 IncrementalHoareTripleChecker+Valid, 36969 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:23:53,842 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 697 Invalid, 37070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [101 Valid, 36969 Invalid, 0 Unknown, 0 Unchecked, 7.8s Time] [2022-02-15 01:23:53,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2022-02-15 01:23:53,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 277. [2022-02-15 01:23:53,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 277 states, 272 states have (on average 1.0073529411764706) internal successors, (274), 272 states have internal predecessors, (274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:53,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 277 states to 277 states and 278 transitions. [2022-02-15 01:23:53,901 INFO L78 Accepts]: Start accepts. Automaton has 277 states and 278 transitions. Word has length 272 [2022-02-15 01:23:53,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:23:53,902 INFO L470 AbstractCegarLoop]: Abstraction has 277 states and 278 transitions. [2022-02-15 01:23:53,902 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 190 states, 189 states have (on average 1.417989417989418) internal successors, (268), 188 states have internal predecessors, (268), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:23:53,902 INFO L276 IsEmpty]: Start isEmpty. Operand 277 states and 278 transitions. [2022-02-15 01:23:53,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-02-15 01:23:53,903 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:23:53,903 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 79, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:23:53,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-02-15 01:23:53,903 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:23:53,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:23:53,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1205946866, now seen corresponding path program 87 times [2022-02-15 01:23:53,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:23:53,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [65578701] [2022-02-15 01:23:53,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:23:53,939 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:53,959 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:53,960 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:23:53,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:54,025 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:23:54,025 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:23:54,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:23:54,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:54,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:23:54,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:23:54,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:01,845 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:01,845 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [65578701] [2022-02-15 01:24:01,845 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [65578701] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:01,845 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:01,845 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [192] imperfect sequences [] total 192 [2022-02-15 01:24:01,845 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937087018] [2022-02-15 01:24:01,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:01,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 192 states [2022-02-15 01:24:01,846 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:01,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 192 interpolants. [2022-02-15 01:24:01,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=503, Invalid=36553, Unknown=0, NotChecked=0, Total=37056 [2022-02-15 01:24:01,849 INFO L87 Difference]: Start difference. First operand 277 states and 278 transitions. Second operand has 192 states, 191 states have (on average 1.418848167539267) internal successors, (271), 190 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:24:15,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:15,364 INFO L93 Difference]: Finished difference Result 289 states and 293 transitions. [2022-02-15 01:24:15,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 189 states. [2022-02-15 01:24:15,364 INFO L78 Accepts]: Start accepts. Automaton has has 192 states, 191 states have (on average 1.418848167539267) internal successors, (271), 190 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-02-15 01:24:15,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:15,365 INFO L225 Difference]: With dead ends: 289 [2022-02-15 01:24:15,365 INFO L226 Difference]: Without dead ends: 281 [2022-02-15 01:24:15,370 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 463 GetRequests, 84 SyntacticMatches, 2 SemanticMatches, 377 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47445 ImplicationChecksByTransitivity, 13.2s TimeCoverageRelationStatistics Valid=1454, Invalid=141808, Unknown=0, NotChecked=0, Total=143262 [2022-02-15 01:24:15,370 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 350 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 37387 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 697 SdHoareTripleChecker+Invalid, 37489 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 37387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:15,370 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [350 Valid, 697 Invalid, 37489 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 37387 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-02-15 01:24:15,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2022-02-15 01:24:15,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2022-02-15 01:24:15,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 275 states have (on average 1.0072727272727273) internal successors, (277), 275 states have internal predecessors, (277), 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) [2022-02-15 01:24:15,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 281 transitions. [2022-02-15 01:24:15,429 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 281 transitions. Word has length 275 [2022-02-15 01:24:15,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:15,430 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 281 transitions. [2022-02-15 01:24:15,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 192 states, 191 states have (on average 1.418848167539267) internal successors, (271), 190 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:24:15,430 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 281 transitions. [2022-02-15 01:24:15,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 279 [2022-02-15 01:24:15,431 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:15,431 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 80, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:15,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-02-15 01:24:15,431 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:15,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:15,431 INFO L85 PathProgramCache]: Analyzing trace with hash 67797513, now seen corresponding path program 88 times [2022-02-15 01:24:15,431 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:15,431 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [825346678] [2022-02-15 01:24:15,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:15,493 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:15,533 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:15,534 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:24:15,574 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:15,626 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:15,626 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:24:15,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:15,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:15,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:15,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:15,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:25,702 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:25,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [825346678] [2022-02-15 01:24:25,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [825346678] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:25,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:25,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [194] imperfect sequences [] total 194 [2022-02-15 01:24:25,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112785695] [2022-02-15 01:24:25,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:25,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 194 states [2022-02-15 01:24:25,703 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:25,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 194 interpolants. [2022-02-15 01:24:25,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=508, Invalid=37322, Unknown=0, NotChecked=0, Total=37830 [2022-02-15 01:24:25,706 INFO L87 Difference]: Start difference. First operand 280 states and 281 transitions. Second operand has 194 states, 193 states have (on average 1.4196891191709844) internal successors, (274), 192 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:24:41,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:24:41,546 INFO L93 Difference]: Finished difference Result 292 states and 296 transitions. [2022-02-15 01:24:41,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 191 states. [2022-02-15 01:24:41,547 INFO L78 Accepts]: Start accepts. Automaton has has 194 states, 193 states have (on average 1.4196891191709844) internal successors, (274), 192 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 278 [2022-02-15 01:24:41,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:24:41,548 INFO L225 Difference]: With dead ends: 292 [2022-02-15 01:24:41,548 INFO L226 Difference]: Without dead ends: 284 [2022-02-15 01:24:41,553 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 468 GetRequests, 86 SyntacticMatches, 1 SemanticMatches, 381 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48436 ImplicationChecksByTransitivity, 16.1s TimeCoverageRelationStatistics Valid=1469, Invalid=144837, Unknown=0, NotChecked=0, Total=146306 [2022-02-15 01:24:41,553 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 353 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 38620 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 38723 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 38620 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:24:41,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 712 Invalid, 38723 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 38620 Invalid, 0 Unknown, 0 Unchecked, 9.1s Time] [2022-02-15 01:24:41,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-02-15 01:24:41,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 283. [2022-02-15 01:24:41,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 278 states have (on average 1.0071942446043165) internal successors, (280), 278 states have internal predecessors, (280), 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) [2022-02-15 01:24:41,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 284 transitions. [2022-02-15 01:24:41,612 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 284 transitions. Word has length 278 [2022-02-15 01:24:41,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:24:41,612 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 284 transitions. [2022-02-15 01:24:41,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 194 states, 193 states have (on average 1.4196891191709844) internal successors, (274), 192 states have internal predecessors, (274), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:24:41,612 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 284 transitions. [2022-02-15 01:24:41,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 282 [2022-02-15 01:24:41,613 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:24:41,613 INFO L514 BasicCegarLoop]: trace histogram [90, 90, 81, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:24:41,613 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-02-15 01:24:41,613 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:24:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:24:41,613 INFO L85 PathProgramCache]: Analyzing trace with hash 150532142, now seen corresponding path program 89 times [2022-02-15 01:24:41,613 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:24:41,613 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [698523686] [2022-02-15 01:24:41,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:24:41,674 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:41,712 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:41,712 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:24:41,740 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:41,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:24:41,789 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:24:41,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:24:41,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:41,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:24:41,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:24:41,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:24:49,199 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:24:49,201 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [698523686] [2022-02-15 01:24:49,201 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [698523686] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:24:49,201 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:24:49,201 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [196] imperfect sequences [] total 196 [2022-02-15 01:24:49,201 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399721501] [2022-02-15 01:24:49,201 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:24:49,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 196 states [2022-02-15 01:24:49,201 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:24:49,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 196 interpolants. [2022-02-15 01:24:49,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=513, Invalid=38099, Unknown=0, NotChecked=0, Total=38612 [2022-02-15 01:24:49,204 INFO L87 Difference]: Start difference. First operand 283 states and 284 transitions. Second operand has 196 states, 195 states have (on average 1.4205128205128206) internal successors, (277), 194 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:03,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:03,857 INFO L93 Difference]: Finished difference Result 295 states and 299 transitions. [2022-02-15 01:25:03,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 193 states. [2022-02-15 01:25:03,858 INFO L78 Accepts]: Start accepts. Automaton has has 196 states, 195 states have (on average 1.4205128205128206) internal successors, (277), 194 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 281 [2022-02-15 01:25:03,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:03,859 INFO L225 Difference]: With dead ends: 295 [2022-02-15 01:25:03,859 INFO L226 Difference]: Without dead ends: 287 [2022-02-15 01:25:03,863 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 473 GetRequests, 86 SyntacticMatches, 2 SemanticMatches, 385 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49437 ImplicationChecksByTransitivity, 13.0s TimeCoverageRelationStatistics Valid=1484, Invalid=147898, Unknown=0, NotChecked=0, Total=149382 [2022-02-15 01:25:03,864 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 358 mSDsluCounter, 722 mSDsCounter, 0 mSdLazyCounter, 40145 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 40249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 40145 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:03,864 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [358 Valid, 732 Invalid, 40249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 40145 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2022-02-15 01:25:03,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2022-02-15 01:25:03,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 286. [2022-02-15 01:25:03,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 281 states have (on average 1.00711743772242) internal successors, (283), 281 states have internal predecessors, (283), 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) [2022-02-15 01:25:03,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 287 transitions. [2022-02-15 01:25:03,925 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 287 transitions. Word has length 281 [2022-02-15 01:25:03,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:03,925 INFO L470 AbstractCegarLoop]: Abstraction has 286 states and 287 transitions. [2022-02-15 01:25:03,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 196 states, 195 states have (on average 1.4205128205128206) internal successors, (277), 194 states have internal predecessors, (277), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:03,925 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 287 transitions. [2022-02-15 01:25:03,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 285 [2022-02-15 01:25:03,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:03,926 INFO L514 BasicCegarLoop]: trace histogram [91, 91, 82, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:03,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-02-15 01:25:03,926 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:03,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:03,926 INFO L85 PathProgramCache]: Analyzing trace with hash -413363223, now seen corresponding path program 90 times [2022-02-15 01:25:03,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:03,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [53609192] [2022-02-15 01:25:03,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:03,971 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:04,000 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:04,000 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:25:04,022 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:04,060 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:04,060 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:25:04,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:04,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:04,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:04,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:14,321 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:14,321 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [53609192] [2022-02-15 01:25:14,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [53609192] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:14,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:14,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [198] imperfect sequences [] total 198 [2022-02-15 01:25:14,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397370430] [2022-02-15 01:25:14,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:14,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 198 states [2022-02-15 01:25:14,322 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:14,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 198 interpolants. [2022-02-15 01:25:14,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=518, Invalid=38884, Unknown=0, NotChecked=0, Total=39402 [2022-02-15 01:25:14,325 INFO L87 Difference]: Start difference. First operand 286 states and 287 transitions. Second operand has 198 states, 197 states have (on average 1.4213197969543148) internal successors, (280), 196 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:30,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:30,829 INFO L93 Difference]: Finished difference Result 298 states and 302 transitions. [2022-02-15 01:25:30,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 195 states. [2022-02-15 01:25:30,829 INFO L78 Accepts]: Start accepts. Automaton has has 198 states, 197 states have (on average 1.4213197969543148) internal successors, (280), 196 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 284 [2022-02-15 01:25:30,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:30,830 INFO L225 Difference]: With dead ends: 298 [2022-02-15 01:25:30,830 INFO L226 Difference]: Without dead ends: 290 [2022-02-15 01:25:30,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 87 SyntacticMatches, 2 SemanticMatches, 389 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50448 ImplicationChecksByTransitivity, 16.7s TimeCoverageRelationStatistics Valid=1499, Invalid=150991, Unknown=0, NotChecked=0, Total=152490 [2022-02-15 01:25:30,837 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 362 mSDsluCounter, 702 mSDsCounter, 0 mSdLazyCounter, 39466 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 362 SdHoareTripleChecker+Valid, 712 SdHoareTripleChecker+Invalid, 39571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 39466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:30,837 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [362 Valid, 712 Invalid, 39571 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [105 Valid, 39466 Invalid, 0 Unknown, 0 Unchecked, 9.4s Time] [2022-02-15 01:25:30,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-02-15 01:25:30,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 289. [2022-02-15 01:25:30,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 284 states have (on average 1.0070422535211268) internal successors, (286), 284 states have internal predecessors, (286), 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) [2022-02-15 01:25:30,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 290 transitions. [2022-02-15 01:25:30,936 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 290 transitions. Word has length 284 [2022-02-15 01:25:30,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:30,936 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 290 transitions. [2022-02-15 01:25:30,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 198 states, 197 states have (on average 1.4213197969543148) internal successors, (280), 196 states have internal predecessors, (280), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:30,936 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 290 transitions. [2022-02-15 01:25:30,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-02-15 01:25:30,937 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:30,937 INFO L514 BasicCegarLoop]: trace histogram [92, 92, 83, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:30,937 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-02-15 01:25:30,937 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:30,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:30,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1803087282, now seen corresponding path program 91 times [2022-02-15 01:25:30,938 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:30,938 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1318143407] [2022-02-15 01:25:30,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:30,966 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:30,986 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:30,986 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:25:31,014 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:31,051 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:31,051 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:25:31,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:31,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:31,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:31,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:31,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:25:39,513 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:25:39,513 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1318143407] [2022-02-15 01:25:39,513 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1318143407] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:25:39,513 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:25:39,514 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [200] imperfect sequences [] total 200 [2022-02-15 01:25:39,514 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253003404] [2022-02-15 01:25:39,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:25:39,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 200 states [2022-02-15 01:25:39,514 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:25:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 200 interpolants. [2022-02-15 01:25:39,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=523, Invalid=39677, Unknown=0, NotChecked=0, Total=40200 [2022-02-15 01:25:39,517 INFO L87 Difference]: Start difference. First operand 289 states and 290 transitions. Second operand has 200 states, 199 states have (on average 1.4221105527638191) internal successors, (283), 198 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:53,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:25:53,128 INFO L93 Difference]: Finished difference Result 301 states and 305 transitions. [2022-02-15 01:25:53,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 197 states. [2022-02-15 01:25:53,128 INFO L78 Accepts]: Start accepts. Automaton has has 200 states, 199 states have (on average 1.4221105527638191) internal successors, (283), 198 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-02-15 01:25:53,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:25:53,129 INFO L225 Difference]: With dead ends: 301 [2022-02-15 01:25:53,129 INFO L226 Difference]: Without dead ends: 293 [2022-02-15 01:25:53,135 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 483 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 393 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51469 ImplicationChecksByTransitivity, 13.6s TimeCoverageRelationStatistics Valid=1514, Invalid=154116, Unknown=0, NotChecked=0, Total=155630 [2022-02-15 01:25:53,135 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 366 mSDsluCounter, 742 mSDsCounter, 0 mSdLazyCounter, 42148 mSolverCounterSat, 106 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 366 SdHoareTripleChecker+Valid, 752 SdHoareTripleChecker+Invalid, 42254 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 106 IncrementalHoareTripleChecker+Valid, 42148 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:25:53,135 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [366 Valid, 752 Invalid, 42254 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [106 Valid, 42148 Invalid, 0 Unknown, 0 Unchecked, 7.9s Time] [2022-02-15 01:25:53,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-02-15 01:25:53,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 292. [2022-02-15 01:25:53,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 287 states have (on average 1.0069686411149825) internal successors, (289), 287 states have internal predecessors, (289), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:53,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 293 transitions. [2022-02-15 01:25:53,199 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 293 transitions. Word has length 287 [2022-02-15 01:25:53,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:25:53,199 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 293 transitions. [2022-02-15 01:25:53,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 200 states, 199 states have (on average 1.4221105527638191) internal successors, (283), 198 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:25:53,199 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 293 transitions. [2022-02-15 01:25:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 291 [2022-02-15 01:25:53,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:25:53,200 INFO L514 BasicCegarLoop]: trace histogram [93, 93, 84, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:25:53,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-02-15 01:25:53,200 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:25:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:25:53,201 INFO L85 PathProgramCache]: Analyzing trace with hash 412204489, now seen corresponding path program 92 times [2022-02-15 01:25:53,201 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:25:53,201 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [539472948] [2022-02-15 01:25:53,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:25:53,237 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:53,257 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:53,258 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:25:53,284 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:53,311 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:25:53,312 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:25:53,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:25:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:53,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:25:53,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:25:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:26:01,147 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:26:01,147 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [539472948] [2022-02-15 01:26:01,147 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [539472948] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:26:01,147 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:26:01,147 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [202] imperfect sequences [] total 202 [2022-02-15 01:26:01,147 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134137122] [2022-02-15 01:26:01,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:26:01,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 202 states [2022-02-15 01:26:01,148 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:26:01,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 202 interpolants. [2022-02-15 01:26:01,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=40478, Unknown=0, NotChecked=0, Total=41006 [2022-02-15 01:26:01,150 INFO L87 Difference]: Start difference. First operand 292 states and 293 transitions. Second operand has 202 states, 201 states have (on average 1.4228855721393034) internal successors, (286), 200 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:26:14,450 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:26:14,450 INFO L93 Difference]: Finished difference Result 304 states and 308 transitions. [2022-02-15 01:26:14,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 199 states. [2022-02-15 01:26:14,450 INFO L78 Accepts]: Start accepts. Automaton has has 202 states, 201 states have (on average 1.4228855721393034) internal successors, (286), 200 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 290 [2022-02-15 01:26:14,451 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:26:14,451 INFO L225 Difference]: With dead ends: 304 [2022-02-15 01:26:14,451 INFO L226 Difference]: Without dead ends: 296 [2022-02-15 01:26:14,457 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 488 GetRequests, 90 SyntacticMatches, 1 SemanticMatches, 397 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52500 ImplicationChecksByTransitivity, 12.9s TimeCoverageRelationStatistics Valid=1529, Invalid=157273, Unknown=0, NotChecked=0, Total=158802 [2022-02-15 01:26:14,457 INFO L933 BasicCegarLoop]: 10 mSDtfsCounter, 370 mSDsluCounter, 732 mSDsCounter, 0 mSdLazyCounter, 42024 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 742 SdHoareTripleChecker+Invalid, 42131 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 42024 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:26:14,458 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 742 Invalid, 42131 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 42024 Invalid, 0 Unknown, 0 Unchecked, 7.6s Time] [2022-02-15 01:26:14,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2022-02-15 01:26:14,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 295. [2022-02-15 01:26:14,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 290 states have (on average 1.006896551724138) internal successors, (292), 290 states have internal predecessors, (292), 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) [2022-02-15 01:26:14,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 296 transitions. [2022-02-15 01:26:14,522 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 296 transitions. Word has length 290 [2022-02-15 01:26:14,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:26:14,523 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 296 transitions. [2022-02-15 01:26:14,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 202 states, 201 states have (on average 1.4228855721393034) internal successors, (286), 200 states have internal predecessors, (286), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:26:14,523 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 296 transitions. [2022-02-15 01:26:14,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 294 [2022-02-15 01:26:14,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:26:14,524 INFO L514 BasicCegarLoop]: trace histogram [94, 94, 85, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:26:14,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-02-15 01:26:14,524 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:26:14,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:26:14,524 INFO L85 PathProgramCache]: Analyzing trace with hash -298115986, now seen corresponding path program 93 times [2022-02-15 01:26:14,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:26:14,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [125883519] [2022-02-15 01:26:14,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:26:14,561 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:26:14,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:26:14,588 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:26:14,607 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 1 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:26:14,641 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, 0 ReadonlyVariables, Eigenvalues: {1={1=1, 2=1}}, 1 SequentialAcceleration, 0 AlternatingAcceleration, 1 QuantifierFreeResult [2022-02-15 01:26:14,642 INFO L262 tedInterpolationCore]: Starting analysis with loop acceleration approximation UNDERAPPROXIMATION [2022-02-15 01:26:14,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:26:14,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:26:14,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:26:14,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:26:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:26:22,950 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:26:22,950 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [125883519] [2022-02-15 01:26:22,950 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [125883519] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:26:22,950 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:26:22,950 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [204] imperfect sequences [] total 204 [2022-02-15 01:26:22,950 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148353703] [2022-02-15 01:26:22,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:26:22,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 204 states [2022-02-15 01:26:22,951 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:26:22,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 204 interpolants. [2022-02-15 01:26:22,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=41287, Unknown=0, NotChecked=0, Total=41820 [2022-02-15 01:26:22,956 INFO L87 Difference]: Start difference. First operand 295 states and 296 transitions. Second operand has 204 states, 203 states have (on average 1.4236453201970443) internal successors, (289), 202 states have internal predecessors, (289), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)