/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/vogal-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:13:07,335 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:13:07,336 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:13:07,388 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:13:07,411 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:13:07,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:13:07,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:13:07,416 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-24 01:13:07,427 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:13:07,427 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:13:07,428 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:13:07,429 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:13:07,430 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:13:07,430 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:13:07,430 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:13:07,431 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:13:07,431 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:13:07,431 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:13:07,608 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:13:07,623 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:13:07,625 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:13:07,625 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:13:07,626 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:13:07,627 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/vogal-2.i [2022-02-24 01:13:07,677 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58158858b/daf2a3ac8efe4f4fa4f7800d487b00e6/FLAG245a04282 [2022-02-24 01:13:07,991 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:13:07,991 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/vogal-2.i [2022-02-24 01:13:07,995 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58158858b/daf2a3ac8efe4f4fa4f7800d487b00e6/FLAG245a04282 [2022-02-24 01:13:08,437 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/58158858b/daf2a3ac8efe4f4fa4f7800d487b00e6 [2022-02-24 01:13:08,438 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:13:08,439 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:13:08,443 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:13:08,443 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:13:08,445 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:13:08,445 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,446 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1639edeb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08, skipping insertion in model container [2022-02-24 01:13:08,446 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,451 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:13:08,462 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:13:08,557 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/vogal-2.i[808,821] [2022-02-24 01:13:08,575 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:13:08,580 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:13:08,587 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/vogal-2.i[808,821] [2022-02-24 01:13:08,594 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:13:08,602 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:13:08,602 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08 WrapperNode [2022-02-24 01:13:08,602 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:13:08,603 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:13:08,603 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:13:08,603 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:13:08,611 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,611 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,615 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,616 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,623 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,627 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,628 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,629 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:13:08,630 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:13:08,630 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:13:08,630 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:13:08,631 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (1/1) ... [2022-02-24 01:13:08,635 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:13:08,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:13:08,653 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-24 01:13:08,658 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-24 01:13:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:13:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:13:08,686 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:13:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:13:08,687 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:13:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:13:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:13:08,687 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-02-24 01:13:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-02-24 01:13:08,688 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:13:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:13:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:13:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_char [2022-02-24 01:13:08,689 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:13:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:13:08,690 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:13:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:13:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:13:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:13:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:13:08,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:13:08,754 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:13:08,755 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:13:08,934 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:13:08,938 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:13:08,938 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2022-02-24 01:13:08,939 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:13:08 BoogieIcfgContainer [2022-02-24 01:13:08,939 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:13:08,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:13:08,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:13:08,957 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:13:08,957 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:13:08" (1/3) ... [2022-02-24 01:13:08,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347c98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:13:08, skipping insertion in model container [2022-02-24 01:13:08,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:13:08" (2/3) ... [2022-02-24 01:13:08,958 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@347c98a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:13:08, skipping insertion in model container [2022-02-24 01:13:08,958 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:13:08" (3/3) ... [2022-02-24 01:13:08,959 INFO L111 eAbstractionObserver]: Analyzing ICFG vogal-2.i [2022-02-24 01:13:08,962 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:13:08,963 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:13:08,990 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:13:08,994 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 [2022-02-24 01:13:08,994 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:13:09,017 INFO L276 IsEmpty]: Start isEmpty. Operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:13:09,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2022-02-24 01:13:09,023 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,023 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,023 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,027 INFO L85 PathProgramCache]: Analyzing trace with hash 1427166884, now seen corresponding path program 1 times [2022-02-24 01:13:09,049 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,049 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025395450] [2022-02-24 01:13:09,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,101 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:13:09,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:09,246 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:09,247 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025395450] [2022-02-24 01:13:09,248 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025395450] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:09,249 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:09,249 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:13:09,250 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120217231] [2022-02-24 01:13:09,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:09,254 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:13:09,254 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:09,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:13:09,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:13:09,279 INFO L87 Difference]: Start difference. First operand has 36 states, 28 states have (on average 1.5714285714285714) internal successors, (44), 29 states have internal predecessors, (44), 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 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:09,327 INFO L93 Difference]: Finished difference Result 64 states and 91 transitions. [2022-02-24 01:13:09,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:13:09,331 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 17 [2022-02-24 01:13:09,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,340 INFO L225 Difference]: With dead ends: 64 [2022-02-24 01:13:09,340 INFO L226 Difference]: Without dead ends: 29 [2022-02-24 01:13:09,344 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:13:09,348 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 34 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 3 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 5 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 3 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,349 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 45 Invalid, 5 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 3 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:09,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2022-02-24 01:13:09,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2022-02-24 01:13:09,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 24 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) [2022-02-24 01:13:09,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 36 transitions. [2022-02-24 01:13:09,385 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 36 transitions. Word has length 17 [2022-02-24 01:13:09,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,385 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 36 transitions. [2022-02-24 01:13:09,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,385 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 36 transitions. [2022-02-24 01:13:09,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 01:13:09,387 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,387 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:13:09,387 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1183431677, now seen corresponding path program 1 times [2022-02-24 01:13:09,388 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,388 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1870116311] [2022-02-24 01:13:09,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,394 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:13:09,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:09,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:09,509 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:09,510 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1870116311] [2022-02-24 01:13:09,510 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1870116311] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:09,510 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:09,510 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:13:09,511 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441940080] [2022-02-24 01:13:09,511 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:09,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:13:09,512 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:09,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:13:09,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:13:09,512 INFO L87 Difference]: Start difference. First operand 29 states and 36 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:09,599 INFO L93 Difference]: Finished difference Result 65 states and 85 transitions. [2022-02-24 01:13:09,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:13:09,599 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-24 01:13:09,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,602 INFO L225 Difference]: With dead ends: 65 [2022-02-24 01:13:09,602 INFO L226 Difference]: Without dead ends: 44 [2022-02-24 01:13:09,605 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:09,606 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 63 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,606 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:09,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2022-02-24 01:13:09,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2022-02-24 01:13:09,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 37 transitions. [2022-02-24 01:13:09,616 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 37 transitions. Word has length 19 [2022-02-24 01:13:09,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,616 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 37 transitions. [2022-02-24 01:13:09,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,616 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 37 transitions. [2022-02-24 01:13:09,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2022-02-24 01:13:09,617 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,617 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:13:09,617 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,617 INFO L85 PathProgramCache]: Analyzing trace with hash -742748965, now seen corresponding path program 1 times [2022-02-24 01:13:09,617 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,618 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [929208859] [2022-02-24 01:13:09,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,631 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:09,632 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:09,632 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:09,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:09,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,735 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:09,735 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:09,735 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [929208859] [2022-02-24 01:13:09,736 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [929208859] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:09,737 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:09,737 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:13:09,737 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649430455] [2022-02-24 01:13:09,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:09,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:13:09,737 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:09,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:13:09,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:09,738 INFO L87 Difference]: Start difference. First operand 30 states and 37 transitions. Second operand has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:09,865 INFO L93 Difference]: Finished difference Result 80 states and 106 transitions. [2022-02-24 01:13:09,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:13:09,866 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 21 [2022-02-24 01:13:09,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:09,869 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:13:09,869 INFO L226 Difference]: Without dead ends: 59 [2022-02-24 01:13:09,870 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:09,875 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 96 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 39 SdHoareTripleChecker+Invalid, 83 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:09,877 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 39 Invalid, 83 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:09,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2022-02-24 01:13:09,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 32. [2022-02-24 01:13:09,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 27 states have (on average 1.2962962962962963) internal successors, (35), 27 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) [2022-02-24 01:13:09,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 39 transitions. [2022-02-24 01:13:09,892 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 39 transitions. Word has length 21 [2022-02-24 01:13:09,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:09,892 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 39 transitions. [2022-02-24 01:13:09,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.4) internal successors, (17), 4 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:09,892 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 39 transitions. [2022-02-24 01:13:09,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-02-24 01:13:09,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:09,893 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:09,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:13:09,893 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:09,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:09,893 INFO L85 PathProgramCache]: Analyzing trace with hash -671441351, now seen corresponding path program 2 times [2022-02-24 01:13:09,893 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:09,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [270819205] [2022-02-24 01:13:09,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:09,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:09,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:09,897 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:09,897 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:09,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:09,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:09,996 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:09,996 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [270819205] [2022-02-24 01:13:09,996 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [270819205] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:09,996 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:09,997 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:13:09,997 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112186754] [2022-02-24 01:13:09,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:09,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:13:09,997 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:09,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:13:09,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:13:09,998 INFO L87 Difference]: Start difference. First operand 32 states and 39 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,173 INFO L93 Difference]: Finished difference Result 95 states and 127 transitions. [2022-02-24 01:13:10,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:13:10,174 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-02-24 01:13:10,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,179 INFO L225 Difference]: With dead ends: 95 [2022-02-24 01:13:10,179 INFO L226 Difference]: Without dead ends: 74 [2022-02-24 01:13:10,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:10,183 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 159 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 93 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 93 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,183 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 46 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 93 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:10,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2022-02-24 01:13:10,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 34. [2022-02-24 01:13:10,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 29 states have (on average 1.2758620689655173) internal successors, (37), 29 states have internal predecessors, (37), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 41 transitions. [2022-02-24 01:13:10,190 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 41 transitions. Word has length 23 [2022-02-24 01:13:10,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,190 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 41 transitions. [2022-02-24 01:13:10,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,190 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 41 transitions. [2022-02-24 01:13:10,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:13:10,191 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,191 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:10,191 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:13:10,193 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,193 INFO L85 PathProgramCache]: Analyzing trace with hash -864301033, now seen corresponding path program 3 times [2022-02-24 01:13:10,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2069893978] [2022-02-24 01:13:10,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,203 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:10,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:10,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2069893978] [2022-02-24 01:13:10,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2069893978] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:10,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:10,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:10,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661649589] [2022-02-24 01:13:10,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:10,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:10,324 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:10,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:10,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:10,325 INFO L87 Difference]: Start difference. First operand 34 states and 41 transitions. Second operand has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,542 INFO L93 Difference]: Finished difference Result 110 states and 148 transitions. [2022-02-24 01:13:10,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:10,544 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-24 01:13:10,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,548 INFO L225 Difference]: With dead ends: 110 [2022-02-24 01:13:10,548 INFO L226 Difference]: Without dead ends: 89 [2022-02-24 01:13:10,551 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:10,552 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 162 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 251 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,552 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [162 Valid, 73 Invalid, 251 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:10,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2022-02-24 01:13:10,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 36. [2022-02-24 01:13:10,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 states have internal predecessors, (39), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-02-24 01:13:10,561 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 25 [2022-02-24 01:13:10,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,561 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-02-24 01:13:10,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.0) internal successors, (21), 6 states have internal predecessors, (21), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,561 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-02-24 01:13:10,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-02-24 01:13:10,562 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,562 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:10,562 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:13:10,562 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,563 INFO L85 PathProgramCache]: Analyzing trace with hash -1518861707, now seen corresponding path program 4 times [2022-02-24 01:13:10,563 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,563 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1980478594] [2022-02-24 01:13:10,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,566 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,566 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,566 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:10,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:10,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:10,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:10,649 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:10,649 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1980478594] [2022-02-24 01:13:10,650 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1980478594] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:10,650 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:10,650 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:13:10,650 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490283666] [2022-02-24 01:13:10,650 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:10,650 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:13:10,650 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:10,650 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:13:10,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:13:10,651 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:10,948 INFO L93 Difference]: Finished difference Result 125 states and 169 transitions. [2022-02-24 01:13:10,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:10,949 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-02-24 01:13:10,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:10,949 INFO L225 Difference]: With dead ends: 125 [2022-02-24 01:13:10,950 INFO L226 Difference]: Without dead ends: 104 [2022-02-24 01:13:10,950 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:10,950 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 240 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 240 SdHoareTripleChecker+Valid, 75 SdHoareTripleChecker+Invalid, 381 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:10,951 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [240 Valid, 75 Invalid, 381 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:10,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2022-02-24 01:13:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 38. [2022-02-24 01:13:10,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 33 states have (on average 1.2424242424242424) internal successors, (41), 33 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) [2022-02-24 01:13:10,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 45 transitions. [2022-02-24 01:13:10,963 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 45 transitions. Word has length 27 [2022-02-24 01:13:10,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:10,963 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 45 transitions. [2022-02-24 01:13:10,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.875) internal successors, (23), 7 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:10,963 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 45 transitions. [2022-02-24 01:13:10,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2022-02-24 01:13:10,964 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:10,964 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:10,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:13:10,964 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:10,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:10,964 INFO L85 PathProgramCache]: Analyzing trace with hash 808523091, now seen corresponding path program 5 times [2022-02-24 01:13:10,965 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:10,965 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193135122] [2022-02-24 01:13:10,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:10,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:10,969 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:10,969 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:10,970 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:11,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:11,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,097 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:11,097 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:11,097 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193135122] [2022-02-24 01:13:11,097 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193135122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:11,097 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:11,097 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:11,097 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029364711] [2022-02-24 01:13:11,097 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:11,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:11,098 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:11,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:11,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:11,098 INFO L87 Difference]: Start difference. First operand 38 states and 45 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:11,433 INFO L93 Difference]: Finished difference Result 140 states and 190 transitions. [2022-02-24 01:13:11,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:11,434 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 29 [2022-02-24 01:13:11,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:11,434 INFO L225 Difference]: With dead ends: 140 [2022-02-24 01:13:11,434 INFO L226 Difference]: Without dead ends: 119 [2022-02-24 01:13:11,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:11,435 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 228 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 554 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 603 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 554 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:11,435 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [228 Valid, 107 Invalid, 603 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 554 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:11,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-02-24 01:13:11,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 40. [2022-02-24 01:13:11,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 35 states have (on average 1.2285714285714286) internal successors, (43), 35 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 47 transitions. [2022-02-24 01:13:11,443 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 47 transitions. Word has length 29 [2022-02-24 01:13:11,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:11,443 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 47 transitions. [2022-02-24 01:13:11,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,444 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 47 transitions. [2022-02-24 01:13:11,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:13:11,444 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:11,444 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:11,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:13:11,444 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:11,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:11,445 INFO L85 PathProgramCache]: Analyzing trace with hash -252647247, now seen corresponding path program 6 times [2022-02-24 01:13:11,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:11,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2089176760] [2022-02-24 01:13:11,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:11,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:11,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:11,447 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:11,447 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:11,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:11,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:11,529 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:11,529 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:11,529 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2089176760] [2022-02-24 01:13:11,529 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2089176760] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:11,529 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:11,529 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:11,529 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087663672] [2022-02-24 01:13:11,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:11,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:11,530 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:11,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:11,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:11,530 INFO L87 Difference]: Start difference. First operand 40 states and 47 transitions. Second operand has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:11,977 INFO L93 Difference]: Finished difference Result 155 states and 211 transitions. [2022-02-24 01:13:11,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:13:11,977 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-24 01:13:11,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:11,978 INFO L225 Difference]: With dead ends: 155 [2022-02-24 01:13:11,978 INFO L226 Difference]: Without dead ends: 134 [2022-02-24 01:13:11,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:13:11,978 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 321 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:11,979 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [321 Valid, 104 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:11,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2022-02-24 01:13:11,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 42. [2022-02-24 01:13:11,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2022-02-24 01:13:11,986 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 31 [2022-02-24 01:13:11,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:11,986 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2022-02-24 01:13:11,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:11,986 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2022-02-24 01:13:11,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:13:11,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:11,987 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:11,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:13:11,987 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:11,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:11,987 INFO L85 PathProgramCache]: Analyzing trace with hash -2130092913, now seen corresponding path program 7 times [2022-02-24 01:13:11,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:11,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717697452] [2022-02-24 01:13:11,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:11,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:11,989 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:11,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:11,990 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:12,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:12,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:12,094 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:12,094 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717697452] [2022-02-24 01:13:12,094 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717697452] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:12,094 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:12,094 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:13:12,094 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301487287] [2022-02-24 01:13:12,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:12,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:13:12,094 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:12,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:13:12,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:12,095 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:12,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:12,621 INFO L93 Difference]: Finished difference Result 170 states and 232 transitions. [2022-02-24 01:13:12,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:12,621 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 33 [2022-02-24 01:13:12,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:12,622 INFO L225 Difference]: With dead ends: 170 [2022-02-24 01:13:12,622 INFO L226 Difference]: Without dead ends: 149 [2022-02-24 01:13:12,623 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:12,623 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 369 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 983 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 369 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1066 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 983 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:12,623 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [369 Valid, 116 Invalid, 1066 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 983 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-02-24 01:13:12,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 44. [2022-02-24 01:13:12,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 39 states have (on average 1.205128205128205) internal successors, (47), 39 states have internal predecessors, (47), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:12,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 51 transitions. [2022-02-24 01:13:12,631 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 51 transitions. Word has length 33 [2022-02-24 01:13:12,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:12,632 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 51 transitions. [2022-02-24 01:13:12,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.6363636363636362) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:12,632 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 51 transitions. [2022-02-24 01:13:12,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-02-24 01:13:12,632 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:12,632 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:12,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:13:12,633 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:12,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:12,633 INFO L85 PathProgramCache]: Analyzing trace with hash 1825853677, now seen corresponding path program 8 times [2022-02-24 01:13:12,633 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:12,633 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [174324149] [2022-02-24 01:13:12,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:12,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:12,635 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:12,635 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:12,636 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:12,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:12,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:12,765 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:12,765 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [174324149] [2022-02-24 01:13:12,765 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [174324149] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:12,765 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:12,765 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:12,765 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053256501] [2022-02-24 01:13:12,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:12,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:12,766 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:12,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:12,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:12,766 INFO L87 Difference]: Start difference. First operand 44 states and 51 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:13,392 INFO L93 Difference]: Finished difference Result 185 states and 253 transitions. [2022-02-24 01:13:13,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:13,392 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-02-24 01:13:13,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:13,393 INFO L225 Difference]: With dead ends: 185 [2022-02-24 01:13:13,393 INFO L226 Difference]: Without dead ends: 164 [2022-02-24 01:13:13,394 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:13,394 INFO L933 BasicCegarLoop]: 111 mSDtfsCounter, 327 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1373 mSolverCounterSat, 73 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 327 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 1446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 73 IncrementalHoareTripleChecker+Valid, 1373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:13,394 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [327 Valid, 158 Invalid, 1446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [73 Valid, 1373 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:13,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2022-02-24 01:13:13,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 46. [2022-02-24 01:13:13,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 41 states have (on average 1.1951219512195121) internal successors, (49), 41 states have internal predecessors, (49), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 53 transitions. [2022-02-24 01:13:13,403 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 53 transitions. Word has length 35 [2022-02-24 01:13:13,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:13,403 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 53 transitions. [2022-02-24 01:13:13,403 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 11 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:13,403 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 53 transitions. [2022-02-24 01:13:13,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 01:13:13,403 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:13,403 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:13,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:13:13,404 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:13,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash -1850497589, now seen corresponding path program 9 times [2022-02-24 01:13:13,404 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:13,404 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163664063] [2022-02-24 01:13:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:13,405 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:13,406 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:13,406 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:13,407 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:13,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,523 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:13,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:13,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:13,526 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:13,527 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163664063] [2022-02-24 01:13:13,527 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [163664063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:13,527 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:13,527 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:13,527 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34846488] [2022-02-24 01:13:13,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:13,527 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:13,527 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:13,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:13,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:13,528 INFO L87 Difference]: Start difference. First operand 46 states and 53 transitions. Second operand has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:14,366 INFO L93 Difference]: Finished difference Result 200 states and 274 transitions. [2022-02-24 01:13:14,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:14,366 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-24 01:13:14,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:14,367 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:13:14,367 INFO L226 Difference]: Without dead ends: 179 [2022-02-24 01:13:14,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:14,368 INFO L933 BasicCegarLoop]: 123 mSDtfsCounter, 360 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1730 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 360 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:14,368 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [360 Valid, 175 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1730 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:14,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2022-02-24 01:13:14,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 48. [2022-02-24 01:13:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 55 transitions. [2022-02-24 01:13:14,377 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 55 transitions. Word has length 37 [2022-02-24 01:13:14,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:14,377 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 55 transitions. [2022-02-24 01:13:14,377 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.5384615384615383) internal successors, (33), 12 states have internal predecessors, (33), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,377 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 55 transitions. [2022-02-24 01:13:14,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:13:14,378 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:14,378 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:14,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:13:14,378 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:14,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash -65979607, now seen corresponding path program 10 times [2022-02-24 01:13:14,378 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:14,378 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [737739143] [2022-02-24 01:13:14,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:14,379 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:14,381 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:14,381 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:14,381 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:14,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,463 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:14,463 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:14,463 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [737739143] [2022-02-24 01:13:14,463 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [737739143] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:14,463 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:14,463 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:14,463 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102910885] [2022-02-24 01:13:14,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:14,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:14,463 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:14,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:14,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:14,464 INFO L87 Difference]: Start difference. First operand 48 states and 55 transitions. Second operand has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:14,565 INFO L93 Difference]: Finished difference Result 72 states and 87 transitions. [2022-02-24 01:13:14,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:14,565 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-02-24 01:13:14,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:14,566 INFO L225 Difference]: With dead ends: 72 [2022-02-24 01:13:14,566 INFO L226 Difference]: Without dead ends: 67 [2022-02-24 01:13:14,566 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:14,566 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 81 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 118 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 124 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 118 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:14,567 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 52 Invalid, 124 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 118 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:14,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-02-24 01:13:14,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-02-24 01:13:14,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 55 states have (on average 1.2363636363636363) internal successors, (68), 55 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 72 transitions. [2022-02-24 01:13:14,584 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 72 transitions. Word has length 39 [2022-02-24 01:13:14,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:14,584 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 72 transitions. [2022-02-24 01:13:14,584 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.4285714285714284) internal successors, (17), 5 states have internal predecessors, (17), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,584 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 72 transitions. [2022-02-24 01:13:14,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 01:13:14,585 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:14,585 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:14,585 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:13:14,585 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:14,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:14,585 INFO L85 PathProgramCache]: Analyzing trace with hash -2124486910, now seen corresponding path program 1 times [2022-02-24 01:13:14,585 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:14,585 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [22646405] [2022-02-24 01:13:14,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:14,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:14,588 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:14,588 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:14,588 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:14,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:14,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:14,672 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:14,672 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [22646405] [2022-02-24 01:13:14,672 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [22646405] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:14,672 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:14,672 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:13:14,672 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605611714] [2022-02-24 01:13:14,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:14,672 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:13:14,672 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:14,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:13:14,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:14,673 INFO L87 Difference]: Start difference. First operand 60 states and 72 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:14,758 INFO L93 Difference]: Finished difference Result 113 states and 151 transitions. [2022-02-24 01:13:14,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:13:14,758 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 45 [2022-02-24 01:13:14,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:14,759 INFO L225 Difference]: With dead ends: 113 [2022-02-24 01:13:14,759 INFO L226 Difference]: Without dead ends: 84 [2022-02-24 01:13:14,759 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:14,760 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 54 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 63 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 74 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 63 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:14,760 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 44 Invalid, 74 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 63 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:14,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-24 01:13:14,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2022-02-24 01:13:14,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 71 states have (on average 1.2394366197183098) internal successors, (88), 71 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 92 transitions. [2022-02-24 01:13:14,786 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 92 transitions. Word has length 45 [2022-02-24 01:13:14,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:14,786 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 92 transitions. [2022-02-24 01:13:14,786 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,786 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 92 transitions. [2022-02-24 01:13:14,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:13:14,786 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:14,786 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:14,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:13:14,787 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:14,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:14,787 INFO L85 PathProgramCache]: Analyzing trace with hash -1273709643, now seen corresponding path program 2 times [2022-02-24 01:13:14,787 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:14,787 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1365495727] [2022-02-24 01:13:14,787 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:14,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:14,789 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:14,789 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:14,789 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:14,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:14,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:14,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:14,841 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:14,842 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1365495727] [2022-02-24 01:13:14,842 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1365495727] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:14,842 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:14,842 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:13:14,842 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103325147] [2022-02-24 01:13:14,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:14,842 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:13:14,842 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:14,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:13:14,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:13:14,842 INFO L87 Difference]: Start difference. First operand 76 states and 92 transitions. Second operand has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:14,953 INFO L93 Difference]: Finished difference Result 141 states and 183 transitions. [2022-02-24 01:13:14,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:13:14,953 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 48 [2022-02-24 01:13:14,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:14,954 INFO L225 Difference]: With dead ends: 141 [2022-02-24 01:13:14,954 INFO L226 Difference]: Without dead ends: 96 [2022-02-24 01:13:14,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:14,954 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 70 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 48 SdHoareTripleChecker+Invalid, 94 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:14,955 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 48 Invalid, 94 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:14,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-24 01:13:14,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 88. [2022-02-24 01:13:14,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 83 states have (on average 1.2530120481927711) internal successors, (104), 83 states have internal predecessors, (104), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-02-24 01:13:14,984 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 48 [2022-02-24 01:13:14,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:14,984 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-02-24 01:13:14,984 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.333333333333333) internal successors, (26), 5 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:14,984 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-02-24 01:13:14,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-02-24 01:13:14,985 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:14,985 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:14,985 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:13:14,985 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:14,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:14,985 INFO L85 PathProgramCache]: Analyzing trace with hash -370162142, now seen corresponding path program 3 times [2022-02-24 01:13:14,985 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:14,985 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [637092036] [2022-02-24 01:13:14,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:14,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:14,988 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:14,988 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:14,988 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:15,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:15,059 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:15,059 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [637092036] [2022-02-24 01:13:15,059 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [637092036] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:15,059 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:15,059 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:15,059 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355391043] [2022-02-24 01:13:15,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:15,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:15,060 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:15,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:15,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:15,060 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,201 INFO L93 Difference]: Finished difference Result 165 states and 215 transitions. [2022-02-24 01:13:15,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:13:15,202 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-02-24 01:13:15,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,202 INFO L225 Difference]: With dead ends: 165 [2022-02-24 01:13:15,202 INFO L226 Difference]: Without dead ends: 108 [2022-02-24 01:13:15,203 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:15,203 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 86 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 117 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 117 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,203 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 52 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 117 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:15,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-24 01:13:15,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 100. [2022-02-24 01:13:15,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 95 states have (on average 1.263157894736842) internal successors, (120), 95 states have internal predecessors, (120), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 124 transitions. [2022-02-24 01:13:15,235 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 124 transitions. Word has length 51 [2022-02-24 01:13:15,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:15,235 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 124 transitions. [2022-02-24 01:13:15,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.142857142857143) internal successors, (29), 6 states have internal predecessors, (29), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,235 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 124 transitions. [2022-02-24 01:13:15,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-02-24 01:13:15,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:15,236 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:15,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:13:15,236 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:15,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:15,236 INFO L85 PathProgramCache]: Analyzing trace with hash 653396117, now seen corresponding path program 4 times [2022-02-24 01:13:15,236 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:15,236 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [745148680] [2022-02-24 01:13:15,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:15,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:15,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:15,239 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:15,239 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:15,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:15,322 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:15,322 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [745148680] [2022-02-24 01:13:15,322 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [745148680] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:15,322 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:15,322 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:13:15,322 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939956141] [2022-02-24 01:13:15,322 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:15,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:13:15,323 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:15,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:13:15,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:13:15,323 INFO L87 Difference]: Start difference. First operand 100 states and 124 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,472 INFO L93 Difference]: Finished difference Result 189 states and 247 transitions. [2022-02-24 01:13:15,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:15,473 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 54 [2022-02-24 01:13:15,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,473 INFO L225 Difference]: With dead ends: 189 [2022-02-24 01:13:15,473 INFO L226 Difference]: Without dead ends: 120 [2022-02-24 01:13:15,474 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:15,474 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 106 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 150 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,474 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 51 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 150 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:15,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-24 01:13:15,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 112. [2022-02-24 01:13:15,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 107 states have (on average 1.2710280373831775) internal successors, (136), 107 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) [2022-02-24 01:13:15,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 140 transitions. [2022-02-24 01:13:15,520 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 140 transitions. Word has length 54 [2022-02-24 01:13:15,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:15,521 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 140 transitions. [2022-02-24 01:13:15,521 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 7 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,521 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 140 transitions. [2022-02-24 01:13:15,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2022-02-24 01:13:15,521 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:15,521 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:15,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:13:15,521 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:15,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:15,522 INFO L85 PathProgramCache]: Analyzing trace with hash -790311614, now seen corresponding path program 5 times [2022-02-24 01:13:15,522 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:15,522 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1371261252] [2022-02-24 01:13:15,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:15,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:15,524 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:15,524 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:15,524 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:15,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:15,597 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:15,597 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1371261252] [2022-02-24 01:13:15,597 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1371261252] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:15,598 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:15,598 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:15,598 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388324675] [2022-02-24 01:13:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:15,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:15,598 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:15,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:15,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:15,598 INFO L87 Difference]: Start difference. First operand 112 states and 140 transitions. Second operand has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:15,789 INFO L93 Difference]: Finished difference Result 213 states and 279 transitions. [2022-02-24 01:13:15,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:15,790 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 57 [2022-02-24 01:13:15,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:15,790 INFO L225 Difference]: With dead ends: 213 [2022-02-24 01:13:15,791 INFO L226 Difference]: Without dead ends: 132 [2022-02-24 01:13:15,791 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:15,791 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 118 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 241 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 271 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 241 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:15,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 60 Invalid, 271 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 241 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-24 01:13:15,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2022-02-24 01:13:15,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 119 states have (on average 1.2773109243697478) internal successors, (152), 119 states have internal predecessors, (152), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 156 transitions. [2022-02-24 01:13:15,832 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 156 transitions. Word has length 57 [2022-02-24 01:13:15,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:15,832 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 156 transitions. [2022-02-24 01:13:15,832 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.888888888888889) internal successors, (35), 8 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:15,832 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 156 transitions. [2022-02-24 01:13:15,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2022-02-24 01:13:15,833 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:15,833 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:15,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:13:15,833 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:15,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:15,833 INFO L85 PathProgramCache]: Analyzing trace with hash -484823691, now seen corresponding path program 6 times [2022-02-24 01:13:15,834 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:15,834 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2112542628] [2022-02-24 01:13:15,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:15,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:15,836 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:15,836 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:15,836 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:15,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:15,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:15,919 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:15,919 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2112542628] [2022-02-24 01:13:15,919 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2112542628] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:15,919 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:15,919 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:15,919 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101784384] [2022-02-24 01:13:15,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:15,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:15,919 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:15,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:15,920 INFO L87 Difference]: Start difference. First operand 124 states and 156 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:16,199 INFO L93 Difference]: Finished difference Result 237 states and 311 transitions. [2022-02-24 01:13:16,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:13:16,199 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 60 [2022-02-24 01:13:16,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:16,200 INFO L225 Difference]: With dead ends: 237 [2022-02-24 01:13:16,200 INFO L226 Difference]: Without dead ends: 144 [2022-02-24 01:13:16,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:13:16,201 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 122 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 422 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:16,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 79 Invalid, 422 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:16,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-24 01:13:16,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 136. [2022-02-24 01:13:16,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 131 states have (on average 1.282442748091603) internal successors, (168), 131 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 172 transitions. [2022-02-24 01:13:16,247 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 172 transitions. Word has length 60 [2022-02-24 01:13:16,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:16,247 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 172 transitions. [2022-02-24 01:13:16,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 9 states have internal predecessors, (38), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,247 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 172 transitions. [2022-02-24 01:13:16,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-02-24 01:13:16,247 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:16,247 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:16,248 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:13:16,248 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:16,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:16,248 INFO L85 PathProgramCache]: Analyzing trace with hash -729809822, now seen corresponding path program 7 times [2022-02-24 01:13:16,248 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:16,248 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1201550653] [2022-02-24 01:13:16,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:16,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:16,250 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:16,250 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:16,250 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:16,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:16,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:16,349 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:16,349 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1201550653] [2022-02-24 01:13:16,349 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1201550653] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:16,349 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:16,349 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:13:16,350 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108429550] [2022-02-24 01:13:16,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:16,350 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:13:16,350 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:16,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:13:16,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:13:16,350 INFO L87 Difference]: Start difference. First operand 136 states and 172 transitions. Second operand has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,717 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:16,717 INFO L93 Difference]: Finished difference Result 261 states and 343 transitions. [2022-02-24 01:13:16,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:16,717 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-02-24 01:13:16,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:16,718 INFO L225 Difference]: With dead ends: 261 [2022-02-24 01:13:16,718 INFO L226 Difference]: Without dead ends: 156 [2022-02-24 01:13:16,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:16,719 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 126 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 555 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 589 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 555 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:16,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 98 Invalid, 589 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 555 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:16,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-24 01:13:16,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 148. [2022-02-24 01:13:16,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 143 states have (on average 1.2867132867132867) internal successors, (184), 143 states have internal predecessors, (184), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 188 transitions. [2022-02-24 01:13:16,770 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 188 transitions. Word has length 63 [2022-02-24 01:13:16,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:16,770 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 188 transitions. [2022-02-24 01:13:16,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.727272727272727) internal successors, (41), 10 states have internal predecessors, (41), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,770 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 188 transitions. [2022-02-24 01:13:16,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-02-24 01:13:16,774 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:16,774 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:16,774 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:13:16,774 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:16,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:16,774 INFO L85 PathProgramCache]: Analyzing trace with hash -1962202539, now seen corresponding path program 8 times [2022-02-24 01:13:16,774 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:16,775 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147599500] [2022-02-24 01:13:16,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:16,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:16,778 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:16,778 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:16,778 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:16,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,845 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:16,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:16,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:16,848 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:16,848 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147599500] [2022-02-24 01:13:16,848 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147599500] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:16,848 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:16,848 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:13:16,848 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556645059] [2022-02-24 01:13:16,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:16,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:13:16,849 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:16,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:13:16,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:13:16,849 INFO L87 Difference]: Start difference. First operand 148 states and 188 transitions. Second operand has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:16,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:16,976 INFO L93 Difference]: Finished difference Result 327 states and 426 transitions. [2022-02-24 01:13:16,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:13:16,976 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 66 [2022-02-24 01:13:16,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:16,977 INFO L225 Difference]: With dead ends: 327 [2022-02-24 01:13:16,977 INFO L226 Difference]: Without dead ends: 210 [2022-02-24 01:13:16,977 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:13:16,978 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 55 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 55 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:16,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [55 Valid, 40 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:13:16,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-24 01:13:17,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 152. [2022-02-24 01:13:17,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 147 states have (on average 1.2857142857142858) internal successors, (189), 147 states have internal predecessors, (189), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 193 transitions. [2022-02-24 01:13:17,034 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 193 transitions. Word has length 66 [2022-02-24 01:13:17,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:17,034 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 193 transitions. [2022-02-24 01:13:17,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.75) internal successors, (23), 3 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,035 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 193 transitions. [2022-02-24 01:13:17,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-24 01:13:17,035 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:17,035 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:17,035 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:13:17,035 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:17,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:17,036 INFO L85 PathProgramCache]: Analyzing trace with hash 1992147995, now seen corresponding path program 1 times [2022-02-24 01:13:17,036 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:17,036 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1526644935] [2022-02-24 01:13:17,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:17,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:17,038 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:17,038 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:17,038 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:17,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:17,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:17,150 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:17,150 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1526644935] [2022-02-24 01:13:17,150 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1526644935] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:17,150 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:17,151 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:17,151 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528916810] [2022-02-24 01:13:17,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:17,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:17,151 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:17,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:17,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:17,151 INFO L87 Difference]: Start difference. First operand 152 states and 193 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:17,587 INFO L93 Difference]: Finished difference Result 244 states and 318 transitions. [2022-02-24 01:13:17,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:17,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-24 01:13:17,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:17,588 INFO L225 Difference]: With dead ends: 244 [2022-02-24 01:13:17,588 INFO L226 Difference]: Without dead ends: 183 [2022-02-24 01:13:17,588 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=339, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:17,588 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 147 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 733 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 771 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:17,589 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 111 Invalid, 771 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 733 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:17,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-02-24 01:13:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 158. [2022-02-24 01:13:17,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 153 states have (on average 1.2875816993464053) internal successors, (197), 153 states have internal predecessors, (197), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 201 transitions. [2022-02-24 01:13:17,643 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 201 transitions. Word has length 67 [2022-02-24 01:13:17,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:17,644 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 201 transitions. [2022-02-24 01:13:17,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:17,644 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 201 transitions. [2022-02-24 01:13:17,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2022-02-24 01:13:17,644 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:17,644 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 8, 8, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:17,645 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:13:17,645 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:17,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:17,645 INFO L85 PathProgramCache]: Analyzing trace with hash -480387238, now seen corresponding path program 1 times [2022-02-24 01:13:17,645 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:17,645 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [233289797] [2022-02-24 01:13:17,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:17,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:17,648 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:17,648 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:17,648 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:17,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:17,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:17,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:17,800 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:17,800 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [233289797] [2022-02-24 01:13:17,800 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [233289797] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:17,800 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:17,800 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:13:17,800 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064855384] [2022-02-24 01:13:17,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:17,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:13:17,801 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:17,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:13:17,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:13:17,801 INFO L87 Difference]: Start difference. First operand 158 states and 201 transitions. Second operand has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:18,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:18,128 INFO L93 Difference]: Finished difference Result 341 states and 443 transitions. [2022-02-24 01:13:18,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:18,128 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 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 68 [2022-02-24 01:13:18,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:18,129 INFO L225 Difference]: With dead ends: 341 [2022-02-24 01:13:18,129 INFO L226 Difference]: Without dead ends: 336 [2022-02-24 01:13:18,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:18,130 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 120 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 162 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 177 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 162 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:18,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 56 Invalid, 177 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 162 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:18,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2022-02-24 01:13:18,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 160. [2022-02-24 01:13:18,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 155 states have (on average 1.2838709677419355) internal successors, (199), 155 states have internal predecessors, (199), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:18,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 203 transitions. [2022-02-24 01:13:18,197 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 203 transitions. Word has length 68 [2022-02-24 01:13:18,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:18,197 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 203 transitions. [2022-02-24 01:13:18,197 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.7777777777777777) internal successors, (25), 8 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:18,197 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 203 transitions. [2022-02-24 01:13:18,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-02-24 01:13:18,198 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:18,198 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 9, 9, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:18,198 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:13:18,198 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:18,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:18,198 INFO L85 PathProgramCache]: Analyzing trace with hash 1762866155, now seen corresponding path program 2 times [2022-02-24 01:13:18,199 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:18,199 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1305877371] [2022-02-24 01:13:18,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:18,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:18,201 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:18,201 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:18,201 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:18,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:18,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:18,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:18,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:18,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1305877371] [2022-02-24 01:13:18,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1305877371] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:18,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:18,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:18,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636704298] [2022-02-24 01:13:18,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:18,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:18,342 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:18,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:18,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:18,343 INFO L87 Difference]: Start difference. First operand 160 states and 203 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:18,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:18,773 INFO L93 Difference]: Finished difference Result 299 states and 389 transitions. [2022-02-24 01:13:18,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:18,774 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 70 [2022-02-24 01:13:18,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:18,774 INFO L225 Difference]: With dead ends: 299 [2022-02-24 01:13:18,774 INFO L226 Difference]: Without dead ends: 174 [2022-02-24 01:13:18,775 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:18,775 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 157 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 771 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 157 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 814 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 771 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:18,775 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [157 Valid, 98 Invalid, 814 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 771 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:18,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-24 01:13:18,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 166. [2022-02-24 01:13:18,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 161 states have (on average 1.2732919254658386) internal successors, (205), 161 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) [2022-02-24 01:13:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 209 transitions. [2022-02-24 01:13:18,841 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 209 transitions. Word has length 70 [2022-02-24 01:13:18,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:18,841 INFO L470 AbstractCegarLoop]: Abstraction has 166 states and 209 transitions. [2022-02-24 01:13:18,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 12 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:18,841 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 209 transitions. [2022-02-24 01:13:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:13:18,842 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:18,842 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:18,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:13:18,842 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:18,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:18,842 INFO L85 PathProgramCache]: Analyzing trace with hash 225571355, now seen corresponding path program 3 times [2022-02-24 01:13:18,842 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:18,843 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541894567] [2022-02-24 01:13:18,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:18,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:18,845 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:18,845 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:18,845 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:18,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:19,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:19,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:19,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:19,540 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541894567] [2022-02-24 01:13:19,540 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541894567] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:19,540 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:19,540 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:19,540 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984682598] [2022-02-24 01:13:19,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:19,540 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:19,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:19,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:19,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:19,541 INFO L87 Difference]: Start difference. First operand 166 states and 209 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:20,591 INFO L93 Difference]: Finished difference Result 224 states and 284 transitions. [2022-02-24 01:13:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:13:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 01:13:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:20,592 INFO L225 Difference]: With dead ends: 224 [2022-02-24 01:13:20,592 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 01:13:20,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=139, Invalid=853, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:13:20,593 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 124 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1000 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1038 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1000 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:20,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 99 Invalid, 1038 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1000 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:20,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 01:13:20,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2022-02-24 01:13:20,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 179 states have (on average 1.2737430167597765) internal successors, (228), 179 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 232 transitions. [2022-02-24 01:13:20,674 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 232 transitions. Word has length 73 [2022-02-24 01:13:20,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:20,674 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 232 transitions. [2022-02-24 01:13:20,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:20,674 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 232 transitions. [2022-02-24 01:13:20,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-24 01:13:20,674 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:20,675 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:20,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:13:20,675 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:20,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:20,675 INFO L85 PathProgramCache]: Analyzing trace with hash -167455655, now seen corresponding path program 1 times [2022-02-24 01:13:20,675 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:20,675 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1699218601] [2022-02-24 01:13:20,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:20,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:20,677 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:20,677 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:20,677 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:20,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:20,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:20,925 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:20,926 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1699218601] [2022-02-24 01:13:20,926 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1699218601] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:20,926 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:20,926 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:20,926 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985415914] [2022-02-24 01:13:20,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:20,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:20,926 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:20,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:20,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:20,927 INFO L87 Difference]: Start difference. First operand 184 states and 232 transitions. Second operand has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:21,173 INFO L93 Difference]: Finished difference Result 278 states and 353 transitions. [2022-02-24 01:13:21,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:13:21,173 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-24 01:13:21,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:21,174 INFO L225 Difference]: With dead ends: 278 [2022-02-24 01:13:21,174 INFO L226 Difference]: Without dead ends: 182 [2022-02-24 01:13:21,174 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:21,175 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 154 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 163 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:21,175 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 38 Invalid, 163 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 154 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:21,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2022-02-24 01:13:21,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 182. [2022-02-24 01:13:21,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 177 states have (on average 1.271186440677966) internal successors, (225), 177 states have internal predecessors, (225), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 229 transitions. [2022-02-24 01:13:21,260 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 229 transitions. Word has length 73 [2022-02-24 01:13:21,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:21,260 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 229 transitions. [2022-02-24 01:13:21,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.5) internal successors, (25), 9 states have internal predecessors, (25), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,260 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 229 transitions. [2022-02-24 01:13:21,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-02-24 01:13:21,261 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:21,261 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:21,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:13:21,261 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 965894068, now seen corresponding path program 1 times [2022-02-24 01:13:21,261 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:21,261 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [204597559] [2022-02-24 01:13:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:21,262 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:21,264 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:21,264 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:21,264 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:21,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:21,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:21,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:21,342 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:21,342 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [204597559] [2022-02-24 01:13:21,342 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [204597559] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:21,342 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:21,342 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:13:21,342 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324631442] [2022-02-24 01:13:21,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:21,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:13:21,343 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:21,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:13:21,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:13:21,343 INFO L87 Difference]: Start difference. First operand 182 states and 229 transitions. Second operand has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:21,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:21,910 INFO L93 Difference]: Finished difference Result 840 states and 1094 transitions. [2022-02-24 01:13:21,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:21,911 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-02-24 01:13:21,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:21,913 INFO L225 Difference]: With dead ends: 840 [2022-02-24 01:13:21,913 INFO L226 Difference]: Without dead ends: 748 [2022-02-24 01:13:21,913 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:21,913 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 146 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 159 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 56 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 159 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:21,914 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 56 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 159 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:13:21,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 748 states. [2022-02-24 01:13:22,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 748 to 188. [2022-02-24 01:13:22,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 183 states have (on average 1.273224043715847) internal successors, (233), 183 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 237 transitions. [2022-02-24 01:13:22,004 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 237 transitions. Word has length 75 [2022-02-24 01:13:22,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,004 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 237 transitions. [2022-02-24 01:13:22,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.7142857142857144) internal successors, (26), 6 states have internal predecessors, (26), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,004 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 237 transitions. [2022-02-24 01:13:22,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-24 01:13:22,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,005 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:13:22,005 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,005 INFO L85 PathProgramCache]: Analyzing trace with hash 817686058, now seen corresponding path program 2 times [2022-02-24 01:13:22,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [52645206] [2022-02-24 01:13:22,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,008 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,008 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,008 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:22,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:22,121 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:22,121 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [52645206] [2022-02-24 01:13:22,121 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [52645206] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:22,121 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:22,121 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:13:22,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645068461] [2022-02-24 01:13:22,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:22,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:13:22,123 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:22,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:13:22,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:13:22,124 INFO L87 Difference]: Start difference. First operand 188 states and 237 transitions. Second operand has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:22,752 INFO L93 Difference]: Finished difference Result 855 states and 1113 transitions. [2022-02-24 01:13:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-24 01:13:22,753 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-24 01:13:22,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:22,755 INFO L225 Difference]: With dead ends: 855 [2022-02-24 01:13:22,755 INFO L226 Difference]: Without dead ends: 763 [2022-02-24 01:13:22,755 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:22,756 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 145 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 336 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 346 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 336 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:22,756 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [145 Valid, 99 Invalid, 346 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 336 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:13:22,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-02-24 01:13:22,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 190. [2022-02-24 01:13:22,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 185 states have (on average 1.2756756756756757) internal successors, (236), 185 states have internal predecessors, (236), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 240 transitions. [2022-02-24 01:13:22,853 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 240 transitions. Word has length 79 [2022-02-24 01:13:22,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:22,853 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 240 transitions. [2022-02-24 01:13:22,853 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.75) internal successors, (30), 7 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:22,853 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 240 transitions. [2022-02-24 01:13:22,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2022-02-24 01:13:22,854 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:22,854 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 5, 4, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:22,854 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-24 01:13:22,855 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:22,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:22,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1500692155, now seen corresponding path program 3 times [2022-02-24 01:13:22,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:22,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1656379013] [2022-02-24 01:13:22,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:22,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:22,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:22,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:22,858 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:22,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:22,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:22,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:22,971 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:22,971 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1656379013] [2022-02-24 01:13:22,971 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1656379013] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:22,971 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:22,971 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:13:22,972 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375869669] [2022-02-24 01:13:22,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:22,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:13:22,972 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:22,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:13:22,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:13:22,972 INFO L87 Difference]: Start difference. First operand 190 states and 240 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:24,107 INFO L93 Difference]: Finished difference Result 1287 states and 1682 transitions. [2022-02-24 01:13:24,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:13:24,107 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 81 [2022-02-24 01:13:24,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:24,110 INFO L225 Difference]: With dead ends: 1287 [2022-02-24 01:13:24,110 INFO L226 Difference]: Without dead ends: 1195 [2022-02-24 01:13:24,111 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:24,111 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 218 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 729 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 747 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:24,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 133 Invalid, 747 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 729 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:24,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1195 states. [2022-02-24 01:13:24,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1195 to 194. [2022-02-24 01:13:24,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 189 states have (on average 1.2804232804232805) internal successors, (242), 189 states have internal predecessors, (242), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 246 transitions. [2022-02-24 01:13:24,217 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 246 transitions. Word has length 81 [2022-02-24 01:13:24,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:24,217 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 246 transitions. [2022-02-24 01:13:24,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:24,217 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 246 transitions. [2022-02-24 01:13:24,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-24 01:13:24,217 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:24,217 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 7, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:24,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-24 01:13:24,218 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:24,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:24,218 INFO L85 PathProgramCache]: Analyzing trace with hash -77949125, now seen corresponding path program 4 times [2022-02-24 01:13:24,218 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:24,218 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [210612393] [2022-02-24 01:13:24,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:24,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:24,220 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:24,220 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:24,220 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:24,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:24,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:24,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:24,341 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:24,341 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [210612393] [2022-02-24 01:13:24,341 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [210612393] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:24,341 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:24,341 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:13:24,341 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664138359] [2022-02-24 01:13:24,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:24,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:13:24,341 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:24,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:13:24,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:13:24,342 INFO L87 Difference]: Start difference. First operand 194 states and 246 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:25,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:25,970 INFO L93 Difference]: Finished difference Result 1585 states and 2074 transitions. [2022-02-24 01:13:25,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:25,970 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-24 01:13:25,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:25,974 INFO L225 Difference]: With dead ends: 1585 [2022-02-24 01:13:25,974 INFO L226 Difference]: Without dead ends: 1493 [2022-02-24 01:13:25,974 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=390, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:25,975 INFO L933 BasicCegarLoop]: 134 mSDtfsCounter, 278 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1335 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 181 SdHoareTripleChecker+Invalid, 1355 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:25,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [278 Valid, 181 Invalid, 1355 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1335 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:13:25,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1493 states. [2022-02-24 01:13:26,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1493 to 198. [2022-02-24 01:13:26,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 193 states have (on average 1.2849740932642486) internal successors, (248), 193 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 252 transitions. [2022-02-24 01:13:26,093 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 252 transitions. Word has length 85 [2022-02-24 01:13:26,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:26,093 INFO L470 AbstractCegarLoop]: Abstraction has 198 states and 252 transitions. [2022-02-24 01:13:26,093 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:26,093 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 252 transitions. [2022-02-24 01:13:26,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2022-02-24 01:13:26,094 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:26,094 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:26,094 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-24 01:13:26,094 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:26,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:26,094 INFO L85 PathProgramCache]: Analyzing trace with hash -587201999, now seen corresponding path program 5 times [2022-02-24 01:13:26,094 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:26,094 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [671362136] [2022-02-24 01:13:26,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:26,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:26,097 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:26,097 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:26,097 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:26,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:26,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:26,251 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:26,251 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:26,251 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [671362136] [2022-02-24 01:13:26,251 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [671362136] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:26,251 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:26,251 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:13:26,251 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642029230] [2022-02-24 01:13:26,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:26,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:13:26,252 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:26,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:13:26,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=155, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:13:26,252 INFO L87 Difference]: Start difference. First operand 198 states and 252 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:28,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:28,315 INFO L93 Difference]: Finished difference Result 1883 states and 2466 transitions. [2022-02-24 01:13:28,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:28,317 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 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 89 [2022-02-24 01:13:28,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:28,321 INFO L225 Difference]: With dead ends: 1883 [2022-02-24 01:13:28,321 INFO L226 Difference]: Without dead ends: 1791 [2022-02-24 01:13:28,322 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=84, Invalid=566, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:28,322 INFO L933 BasicCegarLoop]: 172 mSDtfsCounter, 384 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 1759 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 384 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 1783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 1759 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:28,322 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [384 Valid, 219 Invalid, 1783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 1759 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:28,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1791 states. [2022-02-24 01:13:28,450 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1791 to 202. [2022-02-24 01:13:28,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 202 states, 197 states have (on average 1.2893401015228427) internal successors, (254), 197 states have internal predecessors, (254), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:28,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 202 states to 202 states and 258 transitions. [2022-02-24 01:13:28,451 INFO L78 Accepts]: Start accepts. Automaton has 202 states and 258 transitions. Word has length 89 [2022-02-24 01:13:28,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:28,451 INFO L470 AbstractCegarLoop]: Abstraction has 202 states and 258 transitions. [2022-02-24 01:13:28,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 13 states have internal predecessors, (40), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:28,452 INFO L276 IsEmpty]: Start isEmpty. Operand 202 states and 258 transitions. [2022-02-24 01:13:28,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2022-02-24 01:13:28,452 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:28,452 INFO L514 BasicCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:28,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-24 01:13:28,452 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:28,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:28,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1198195239, now seen corresponding path program 6 times [2022-02-24 01:13:28,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:28,453 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1881114527] [2022-02-24 01:13:28,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:28,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:28,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:28,455 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:28,455 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:28,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:28,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:28,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:28,632 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:28,632 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1881114527] [2022-02-24 01:13:28,632 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1881114527] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:28,632 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:28,632 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:13:28,632 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259667117] [2022-02-24 01:13:28,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:28,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:13:28,632 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:28,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:13:28,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:28,633 INFO L87 Difference]: Start difference. First operand 202 states and 258 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:31,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:31,568 INFO L93 Difference]: Finished difference Result 2181 states and 2858 transitions. [2022-02-24 01:13:31,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:13:31,568 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 93 [2022-02-24 01:13:31,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:31,573 INFO L225 Difference]: With dead ends: 2181 [2022-02-24 01:13:31,573 INFO L226 Difference]: Without dead ends: 2089 [2022-02-24 01:13:31,574 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=774, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:31,575 INFO L933 BasicCegarLoop]: 210 mSDtfsCounter, 398 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 3099 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 398 SdHoareTripleChecker+Valid, 277 SdHoareTripleChecker+Invalid, 3123 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 3099 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:31,575 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [398 Valid, 277 Invalid, 3123 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 3099 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:13:31,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2089 states. [2022-02-24 01:13:31,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2089 to 206. [2022-02-24 01:13:31,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 201 states have (on average 1.2935323383084578) internal successors, (260), 201 states have internal predecessors, (260), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:31,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 264 transitions. [2022-02-24 01:13:31,722 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 264 transitions. Word has length 93 [2022-02-24 01:13:31,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:31,722 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 264 transitions. [2022-02-24 01:13:31,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 15 states have internal predecessors, (44), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:31,722 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 264 transitions. [2022-02-24 01:13:31,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-24 01:13:31,723 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:31,723 INFO L514 BasicCegarLoop]: trace histogram [13, 12, 10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:31,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-24 01:13:31,723 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:31,724 INFO L85 PathProgramCache]: Analyzing trace with hash -2083973347, now seen corresponding path program 7 times [2022-02-24 01:13:31,724 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:31,724 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279169312] [2022-02-24 01:13:31,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:31,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:31,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:31,726 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:31,726 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:31,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:31,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:31,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:31,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:31,944 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:31,944 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279169312] [2022-02-24 01:13:31,944 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [279169312] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:31,944 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:31,944 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:13:31,944 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634597367] [2022-02-24 01:13:31,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:31,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:13:31,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:31,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:13:31,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:13:31,945 INFO L87 Difference]: Start difference. First operand 206 states and 264 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:35,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:35,537 INFO L93 Difference]: Finished difference Result 2479 states and 3250 transitions. [2022-02-24 01:13:35,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:13:35,537 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-24 01:13:35,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:35,542 INFO L225 Difference]: With dead ends: 2479 [2022-02-24 01:13:35,542 INFO L226 Difference]: Without dead ends: 2387 [2022-02-24 01:13:35,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=108, Invalid=1014, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:13:35,543 INFO L933 BasicCegarLoop]: 248 mSDtfsCounter, 472 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 3982 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 320 SdHoareTripleChecker+Invalid, 4008 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3982 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:35,543 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 320 Invalid, 4008 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3982 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-24 01:13:35,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2387 states. [2022-02-24 01:13:35,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2387 to 210. [2022-02-24 01:13:35,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 205 states have (on average 1.2975609756097561) internal successors, (266), 205 states have internal predecessors, (266), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:35,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 270 transitions. [2022-02-24 01:13:35,713 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 270 transitions. Word has length 97 [2022-02-24 01:13:35,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:35,713 INFO L470 AbstractCegarLoop]: Abstraction has 210 states and 270 transitions. [2022-02-24 01:13:35,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:35,713 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 270 transitions. [2022-02-24 01:13:35,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2022-02-24 01:13:35,714 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:35,714 INFO L514 BasicCegarLoop]: trace histogram [15, 14, 10, 10, 10, 10, 9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:35,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-24 01:13:35,714 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:35,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:35,715 INFO L85 PathProgramCache]: Analyzing trace with hash -2004369133, now seen corresponding path program 8 times [2022-02-24 01:13:35,715 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:35,715 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2078013814] [2022-02-24 01:13:35,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:35,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:35,717 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:35,717 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:35,718 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:35,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:35,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:35,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:35,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:35,966 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:35,966 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2078013814] [2022-02-24 01:13:35,966 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2078013814] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:35,966 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:35,966 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:13:35,966 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1459460960] [2022-02-24 01:13:35,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:35,967 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:13:35,967 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:35,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:13:35,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=306, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:13:35,967 INFO L87 Difference]: Start difference. First operand 210 states and 270 transitions. Second operand has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:40,149 INFO L93 Difference]: Finished difference Result 2494 states and 3269 transitions. [2022-02-24 01:13:40,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:13:40,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 101 [2022-02-24 01:13:40,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:40,155 INFO L225 Difference]: With dead ends: 2494 [2022-02-24 01:13:40,155 INFO L226 Difference]: Without dead ends: 2402 [2022-02-24 01:13:40,156 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=102, Invalid=1088, Unknown=0, NotChecked=0, Total=1190 [2022-02-24 01:13:40,156 INFO L933 BasicCegarLoop]: 274 mSDtfsCounter, 472 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 5075 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 472 SdHoareTripleChecker+Valid, 356 SdHoareTripleChecker+Invalid, 5097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 5075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:40,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [472 Valid, 356 Invalid, 5097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 5075 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-24 01:13:40,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2402 states. [2022-02-24 01:13:40,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2402 to 212. [2022-02-24 01:13:40,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 207 states have (on average 1.2995169082125604) internal successors, (269), 207 states have internal predecessors, (269), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 273 transitions. [2022-02-24 01:13:40,337 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 273 transitions. Word has length 101 [2022-02-24 01:13:40,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:40,337 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 273 transitions. [2022-02-24 01:13:40,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.736842105263158) internal successors, (52), 18 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:40,337 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 273 transitions. [2022-02-24 01:13:40,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:40,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:40,338 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:40,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-24 01:13:40,338 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:40,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:40,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1801114550, now seen corresponding path program 1 times [2022-02-24 01:13:40,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:40,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [68745221] [2022-02-24 01:13:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:40,339 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:40,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:40,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:40,341 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:40,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:40,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:40,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:40,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:40,976 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:40,976 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [68745221] [2022-02-24 01:13:40,976 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [68745221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:40,976 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:40,976 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:13:40,976 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317123926] [2022-02-24 01:13:40,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:40,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:13:40,976 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:40,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:13:40,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:13:40,977 INFO L87 Difference]: Start difference. First operand 212 states and 273 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:41,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:41,966 INFO L93 Difference]: Finished difference Result 312 states and 402 transitions. [2022-02-24 01:13:41,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:13:41,966 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2022-02-24 01:13:41,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:41,968 INFO L225 Difference]: With dead ends: 312 [2022-02-24 01:13:41,968 INFO L226 Difference]: Without dead ends: 225 [2022-02-24 01:13:41,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:41,969 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 122 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 768 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 806 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:41,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 95 Invalid, 806 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 768 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:13:41,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2022-02-24 01:13:42,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2022-02-24 01:13:42,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2968036529680365) internal successors, (284), 219 states have internal predecessors, (284), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:42,160 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 288 transitions. [2022-02-24 01:13:42,160 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 288 transitions. Word has length 102 [2022-02-24 01:13:42,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:42,161 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 288 transitions. [2022-02-24 01:13:42,161 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:42,161 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 288 transitions. [2022-02-24 01:13:42,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:42,162 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:42,163 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:42,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-24 01:13:42,163 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:42,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:42,163 INFO L85 PathProgramCache]: Analyzing trace with hash 127158152, now seen corresponding path program 1 times [2022-02-24 01:13:42,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:42,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [750090365] [2022-02-24 01:13:42,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:42,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:42,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:42,167 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:42,167 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:42,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:42,732 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:42,732 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:42,732 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [750090365] [2022-02-24 01:13:42,732 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [750090365] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:42,732 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:42,732 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:13:42,732 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411658056] [2022-02-24 01:13:42,732 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:42,733 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:13:42,733 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:42,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:13:42,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=129, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:13:42,733 INFO L87 Difference]: Start difference. First operand 224 states and 288 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:43,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:43,434 INFO L93 Difference]: Finished difference Result 323 states and 415 transitions. [2022-02-24 01:13:43,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:13:43,434 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 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 102 [2022-02-24 01:13:43,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:43,435 INFO L225 Difference]: With dead ends: 323 [2022-02-24 01:13:43,435 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:13:43,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:13:43,436 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 115 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 470 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 470 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:43,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 81 Invalid, 510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 470 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:43,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:13:43,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-24 01:13:43,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2922374429223744) internal successors, (283), 219 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) [2022-02-24 01:13:43,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 287 transitions. [2022-02-24 01:13:43,633 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 287 transitions. Word has length 102 [2022-02-24 01:13:43,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:43,633 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 287 transitions. [2022-02-24 01:13:43,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 12 states have internal predecessors, (46), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:43,633 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 287 transitions. [2022-02-24 01:13:43,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:43,633 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:43,634 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:43,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-24 01:13:43,634 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:43,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:43,634 INFO L85 PathProgramCache]: Analyzing trace with hash 1513943562, now seen corresponding path program 2 times [2022-02-24 01:13:43,634 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:43,634 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [305973157] [2022-02-24 01:13:43,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:43,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:43,636 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:43,636 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:43,636 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:43,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:44,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:44,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:44,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:44,204 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:44,204 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [305973157] [2022-02-24 01:13:44,204 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [305973157] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:44,204 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:44,204 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:13:44,205 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725091852] [2022-02-24 01:13:44,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:44,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:13:44,205 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:44,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:13:44,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=153, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:13:44,205 INFO L87 Difference]: Start difference. First operand 224 states and 287 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:44,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:44,961 INFO L93 Difference]: Finished difference Result 323 states and 413 transitions. [2022-02-24 01:13:44,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:13:44,961 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 102 [2022-02-24 01:13:44,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:44,962 INFO L225 Difference]: With dead ends: 323 [2022-02-24 01:13:44,962 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:13:44,962 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:13:44,963 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 117 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 540 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 578 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 540 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:44,963 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [117 Valid, 74 Invalid, 578 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 540 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:13:45,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-24 01:13:45,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2876712328767124) internal successors, (282), 219 states have internal predecessors, (282), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 286 transitions. [2022-02-24 01:13:45,150 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 286 transitions. Word has length 102 [2022-02-24 01:13:45,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:45,150 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 286 transitions. [2022-02-24 01:13:45,150 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:45,151 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 286 transitions. [2022-02-24 01:13:45,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:45,151 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:45,151 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 5, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:45,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-24 01:13:45,151 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:45,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:45,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1242683704, now seen corresponding path program 3 times [2022-02-24 01:13:45,152 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:45,152 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1057496987] [2022-02-24 01:13:45,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:45,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:45,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:45,154 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:45,154 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:45,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:45,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:45,722 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:45,722 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1057496987] [2022-02-24 01:13:45,722 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1057496987] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:45,723 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:45,723 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:13:45,723 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353467483] [2022-02-24 01:13:45,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:45,723 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:13:45,723 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:45,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:13:45,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=179, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:13:45,723 INFO L87 Difference]: Start difference. First operand 224 states and 286 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:46,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:46,556 INFO L93 Difference]: Finished difference Result 323 states and 411 transitions. [2022-02-24 01:13:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:13:46,556 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:13:46,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:46,557 INFO L225 Difference]: With dead ends: 323 [2022-02-24 01:13:46,557 INFO L226 Difference]: Without dead ends: 224 [2022-02-24 01:13:46,557 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:13:46,557 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 146 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 641 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 689 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:46,558 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [146 Valid, 87 Invalid, 689 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 641 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:13:46,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2022-02-24 01:13:46,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 224. [2022-02-24 01:13:46,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 219 states have internal predecessors, (281), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:46,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 285 transitions. [2022-02-24 01:13:46,748 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 285 transitions. Word has length 102 [2022-02-24 01:13:46,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:46,749 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 285 transitions. [2022-02-24 01:13:46,749 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:46,749 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 285 transitions. [2022-02-24 01:13:46,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:46,749 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:46,749 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 9, 8, 8, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:46,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-24 01:13:46,749 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:46,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:46,750 INFO L85 PathProgramCache]: Analyzing trace with hash -1258202422, now seen corresponding path program 4 times [2022-02-24 01:13:46,750 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:46,750 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1595745700] [2022-02-24 01:13:46,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:46,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:46,752 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:46,752 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:46,752 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:46,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:47,673 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:47,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:47,676 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:47,676 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:47,676 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1595745700] [2022-02-24 01:13:47,676 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1595745700] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:47,676 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:47,676 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:13:47,676 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793510630] [2022-02-24 01:13:47,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:47,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:13:47,677 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:13:47,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=368, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:13:47,677 INFO L87 Difference]: Start difference. First operand 224 states and 285 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:49,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:49,081 INFO L93 Difference]: Finished difference Result 367 states and 470 transitions. [2022-02-24 01:13:49,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:13:49,081 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 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 102 [2022-02-24 01:13:49,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:49,082 INFO L225 Difference]: With dead ends: 367 [2022-02-24 01:13:49,082 INFO L226 Difference]: Without dead ends: 310 [2022-02-24 01:13:49,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=219, Invalid=1587, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:13:49,083 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 140 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1165 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 140 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 1227 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1165 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:49,083 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [140 Valid, 111 Invalid, 1227 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1165 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:13:49,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-24 01:13:49,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 306. [2022-02-24 01:13:49,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2890365448504983) internal successors, (388), 301 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:49,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 392 transitions. [2022-02-24 01:13:49,370 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 392 transitions. Word has length 102 [2022-02-24 01:13:49,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:49,371 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 392 transitions. [2022-02-24 01:13:49,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:49,371 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 392 transitions. [2022-02-24 01:13:49,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:49,371 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:49,372 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:49,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-24 01:13:49,372 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:49,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:49,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1117653812, now seen corresponding path program 5 times [2022-02-24 01:13:49,372 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:49,372 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [660151492] [2022-02-24 01:13:49,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:49,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:49,374 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:49,374 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:49,374 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:49,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:50,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:50,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:50,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:50,428 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:50,429 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [660151492] [2022-02-24 01:13:50,429 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [660151492] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:50,429 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:50,429 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:13:50,429 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339379442] [2022-02-24 01:13:50,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:50,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:13:50,429 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:50,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:13:50,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:13:50,430 INFO L87 Difference]: Start difference. First operand 306 states and 392 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:52,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:52,298 INFO L93 Difference]: Finished difference Result 370 states and 471 transitions. [2022-02-24 01:13:52,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:13:52,299 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 102 [2022-02-24 01:13:52,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:52,300 INFO L225 Difference]: With dead ends: 370 [2022-02-24 01:13:52,300 INFO L226 Difference]: Without dead ends: 313 [2022-02-24 01:13:52,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 459 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=231, Invalid=1931, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:13:52,301 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 144 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1628 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 1690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 1628 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:52,301 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 128 Invalid, 1690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 1628 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:13:52,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-02-24 01:13:52,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 306. [2022-02-24 01:13:52,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 301 states have (on average 1.2857142857142858) internal successors, (387), 301 states have internal predecessors, (387), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:52,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 391 transitions. [2022-02-24 01:13:52,590 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 391 transitions. Word has length 102 [2022-02-24 01:13:52,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:52,590 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 391 transitions. [2022-02-24 01:13:52,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:52,590 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 391 transitions. [2022-02-24 01:13:52,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:52,591 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:52,591 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:52,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-24 01:13:52,591 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:52,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:52,591 INFO L85 PathProgramCache]: Analyzing trace with hash -898799094, now seen corresponding path program 6 times [2022-02-24 01:13:52,591 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:52,591 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1907078743] [2022-02-24 01:13:52,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:52,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:52,593 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:52,593 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:52,594 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:52,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:54,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:54,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:54,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:54,380 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:54,380 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1907078743] [2022-02-24 01:13:54,380 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1907078743] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:54,380 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:54,381 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:13:54,381 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689911202] [2022-02-24 01:13:54,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:54,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:13:54,381 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:54,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:13:54,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=645, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:13:54,382 INFO L87 Difference]: Start difference. First operand 306 states and 391 transitions. Second operand has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:56,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:13:56,873 INFO L93 Difference]: Finished difference Result 974 states and 1252 transitions. [2022-02-24 01:13:56,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-24 01:13:56,873 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:13:56,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:13:56,875 INFO L225 Difference]: With dead ends: 974 [2022-02-24 01:13:56,875 INFO L226 Difference]: Without dead ends: 793 [2022-02-24 01:13:56,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 747 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=522, Invalid=2784, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:13:56,877 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 285 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 1631 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 285 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 1705 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1631 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:13:56,878 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [285 Valid, 96 Invalid, 1705 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1631 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:13:56,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-02-24 01:13:57,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 535. [2022-02-24 01:13:57,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 535 states, 530 states have (on average 1.2754716981132075) internal successors, (676), 530 states have internal predecessors, (676), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:57,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 535 states to 535 states and 680 transitions. [2022-02-24 01:13:57,443 INFO L78 Accepts]: Start accepts. Automaton has 535 states and 680 transitions. Word has length 102 [2022-02-24 01:13:57,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:13:57,444 INFO L470 AbstractCegarLoop]: Abstraction has 535 states and 680 transitions. [2022-02-24 01:13:57,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.642857142857143) internal successors, (74), 27 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:13:57,444 INFO L276 IsEmpty]: Start isEmpty. Operand 535 states and 680 transitions. [2022-02-24 01:13:57,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:13:57,445 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:13:57,445 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:13:57,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-24 01:13:57,445 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:13:57,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:13:57,445 INFO L85 PathProgramCache]: Analyzing trace with hash 1707224460, now seen corresponding path program 7 times [2022-02-24 01:13:57,445 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:13:57,445 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199581757] [2022-02-24 01:13:57,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:13:57,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:13:57,447 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:13:57,448 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:13:57,448 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:13:57,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:59,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:13:59,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:13:59,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:13:59,227 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:13:59,227 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199581757] [2022-02-24 01:13:59,227 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199581757] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:13:59,227 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:13:59,227 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:13:59,227 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598774184] [2022-02-24 01:13:59,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:13:59,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:13:59,228 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:13:59,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:13:59,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=750, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:13:59,228 INFO L87 Difference]: Start difference. First operand 535 states and 680 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:02,156 INFO L93 Difference]: Finished difference Result 1186 states and 1513 transitions. [2022-02-24 01:14:02,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-24 01:14:02,156 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:14:02,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:02,158 INFO L225 Difference]: With dead ends: 1186 [2022-02-24 01:14:02,158 INFO L226 Difference]: Without dead ends: 917 [2022-02-24 01:14:02,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 904 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=574, Invalid=3332, Unknown=0, NotChecked=0, Total=3906 [2022-02-24 01:14:02,160 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 313 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 1945 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 2033 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 1945 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:02,160 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 73 Invalid, 2033 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 1945 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:02,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 917 states. [2022-02-24 01:14:02,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 917 to 665. [2022-02-24 01:14:02,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2696969696969698) internal successors, (838), 660 states have internal predecessors, (838), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:02,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 842 transitions. [2022-02-24 01:14:02,883 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 842 transitions. Word has length 102 [2022-02-24 01:14:02,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:02,883 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 842 transitions. [2022-02-24 01:14:02,883 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:02,883 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 842 transitions. [2022-02-24 01:14:02,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:02,884 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:02,884 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:02,884 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-24 01:14:02,885 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:02,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:02,885 INFO L85 PathProgramCache]: Analyzing trace with hash 686156106, now seen corresponding path program 8 times [2022-02-24 01:14:02,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:02,885 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2139016552] [2022-02-24 01:14:02,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:02,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:02,887 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:02,887 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:02,887 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:02,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:03,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:03,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:03,594 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:03,594 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2139016552] [2022-02-24 01:14:03,594 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2139016552] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:03,595 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:03,595 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:14:03,595 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131127904] [2022-02-24 01:14:03,595 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:03,595 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:14:03,595 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:03,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:14:03,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:14:03,595 INFO L87 Difference]: Start difference. First operand 665 states and 842 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:05,153 INFO L93 Difference]: Finished difference Result 774 states and 982 transitions. [2022-02-24 01:14:05,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:14:05,153 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-24 01:14:05,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:05,155 INFO L225 Difference]: With dead ends: 774 [2022-02-24 01:14:05,155 INFO L226 Difference]: Without dead ends: 665 [2022-02-24 01:14:05,155 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:14:05,155 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 90 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 885 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 916 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 885 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:05,156 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 101 Invalid, 916 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 885 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:05,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-02-24 01:14:05,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 665. [2022-02-24 01:14:05,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 665 states, 660 states have (on average 1.2666666666666666) internal successors, (836), 660 states have internal predecessors, (836), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 665 states to 665 states and 840 transitions. [2022-02-24 01:14:05,889 INFO L78 Accepts]: Start accepts. Automaton has 665 states and 840 transitions. Word has length 102 [2022-02-24 01:14:05,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:05,889 INFO L470 AbstractCegarLoop]: Abstraction has 665 states and 840 transitions. [2022-02-24 01:14:05,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:05,889 INFO L276 IsEmpty]: Start isEmpty. Operand 665 states and 840 transitions. [2022-02-24 01:14:05,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:05,890 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:05,890 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:05,890 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-24 01:14:05,890 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:05,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:05,890 INFO L85 PathProgramCache]: Analyzing trace with hash 99350092, now seen corresponding path program 9 times [2022-02-24 01:14:05,891 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:05,891 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [80565016] [2022-02-24 01:14:05,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:05,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:05,893 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:05,893 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:05,893 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:05,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:06,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:06,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:06,069 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:06,069 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [80565016] [2022-02-24 01:14:06,069 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [80565016] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:06,069 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:06,069 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:14:06,069 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23230110] [2022-02-24 01:14:06,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:06,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:14:06,069 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:14:06,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=182, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:14:06,070 INFO L87 Difference]: Start difference. First operand 665 states and 840 transitions. Second operand has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:13,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:13,437 INFO L93 Difference]: Finished difference Result 5119 states and 6455 transitions. [2022-02-24 01:14:13,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:14:13,437 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:14:13,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:13,448 INFO L225 Difference]: With dead ends: 5119 [2022-02-24 01:14:13,449 INFO L226 Difference]: Without dead ends: 5111 [2022-02-24 01:14:13,449 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=1184, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:14:13,450 INFO L933 BasicCegarLoop]: 206 mSDtfsCounter, 259 mSDsluCounter, 57 mSDsCounter, 0 mSdLazyCounter, 2216 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 259 SdHoareTripleChecker+Valid, 263 SdHoareTripleChecker+Invalid, 2245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 2216 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:13,450 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [259 Valid, 263 Invalid, 2245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 2216 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:14:13,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5111 states. [2022-02-24 01:14:16,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5111 to 2575. [2022-02-24 01:14:16,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2575 states, 2570 states have (on average 1.2634241245136186) internal successors, (3247), 2570 states have internal predecessors, (3247), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:16,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2575 states to 2575 states and 3251 transitions. [2022-02-24 01:14:16,702 INFO L78 Accepts]: Start accepts. Automaton has 2575 states and 3251 transitions. Word has length 102 [2022-02-24 01:14:16,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:16,702 INFO L470 AbstractCegarLoop]: Abstraction has 2575 states and 3251 transitions. [2022-02-24 01:14:16,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.533333333333333) internal successors, (53), 13 states have internal predecessors, (53), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:16,702 INFO L276 IsEmpty]: Start isEmpty. Operand 2575 states and 3251 transitions. [2022-02-24 01:14:16,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:16,705 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:16,705 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:16,706 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-24 01:14:16,706 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:16,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:16,706 INFO L85 PathProgramCache]: Analyzing trace with hash 210306698, now seen corresponding path program 10 times [2022-02-24 01:14:16,706 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:16,706 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [374037009] [2022-02-24 01:14:16,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:16,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:16,708 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:16,708 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:16,708 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:16,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:18,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:18,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:18,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:18,515 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:18,515 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [374037009] [2022-02-24 01:14:18,515 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [374037009] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:18,515 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:18,515 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:14:18,516 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588677916] [2022-02-24 01:14:18,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:18,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:14:18,516 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:18,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:14:18,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:14:18,516 INFO L87 Difference]: Start difference. First operand 2575 states and 3251 transitions. Second operand has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:24,549 INFO L93 Difference]: Finished difference Result 3520 states and 4458 transitions. [2022-02-24 01:14:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:14:24,549 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:14:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:24,557 INFO L225 Difference]: With dead ends: 3520 [2022-02-24 01:14:24,557 INFO L226 Difference]: Without dead ends: 3273 [2022-02-24 01:14:24,558 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 615 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=463, Invalid=2507, Unknown=0, NotChecked=0, Total=2970 [2022-02-24 01:14:24,559 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 237 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1568 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 115 SdHoareTripleChecker+Invalid, 1632 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 1568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:24,559 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 115 Invalid, 1632 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 1568 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:14:24,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3273 states. [2022-02-24 01:14:27,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3273 to 2596. [2022-02-24 01:14:27,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2596 states, 2591 states have (on average 1.2636047857969896) internal successors, (3274), 2591 states have internal predecessors, (3274), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:27,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2596 states to 2596 states and 3278 transitions. [2022-02-24 01:14:27,830 INFO L78 Accepts]: Start accepts. Automaton has 2596 states and 3278 transitions. Word has length 102 [2022-02-24 01:14:27,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:27,831 INFO L470 AbstractCegarLoop]: Abstraction has 2596 states and 3278 transitions. [2022-02-24 01:14:27,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.5357142857142856) internal successors, (71), 27 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:27,831 INFO L276 IsEmpty]: Start isEmpty. Operand 2596 states and 3278 transitions. [2022-02-24 01:14:27,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:27,834 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:27,834 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:27,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-24 01:14:27,834 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:27,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:27,835 INFO L85 PathProgramCache]: Analyzing trace with hash -182720312, now seen corresponding path program 11 times [2022-02-24 01:14:27,835 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:27,835 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1905525884] [2022-02-24 01:14:27,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:27,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:27,837 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:27,837 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:27,837 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:27,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:29,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:29,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:29,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:29,130 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:29,130 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1905525884] [2022-02-24 01:14:29,130 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1905525884] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:29,130 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:29,130 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:14:29,130 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139336653] [2022-02-24 01:14:29,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:29,130 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:14:29,130 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:29,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:14:29,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:14:29,131 INFO L87 Difference]: Start difference. First operand 2596 states and 3278 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:33,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:33,981 INFO L93 Difference]: Finished difference Result 3763 states and 4741 transitions. [2022-02-24 01:14:33,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:14:33,981 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:14:33,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:33,987 INFO L225 Difference]: With dead ends: 3763 [2022-02-24 01:14:33,987 INFO L226 Difference]: Without dead ends: 3073 [2022-02-24 01:14:33,989 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:14:33,989 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 272 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 272 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:33,989 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [272 Valid, 50 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:33,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3073 states. [2022-02-24 01:14:37,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3073 to 2453. [2022-02-24 01:14:37,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2453 states, 2448 states have (on average 1.2610294117647058) internal successors, (3087), 2448 states have internal predecessors, (3087), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:37,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2453 states to 2453 states and 3091 transitions. [2022-02-24 01:14:37,120 INFO L78 Accepts]: Start accepts. Automaton has 2453 states and 3091 transitions. Word has length 102 [2022-02-24 01:14:37,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:37,120 INFO L470 AbstractCegarLoop]: Abstraction has 2453 states and 3091 transitions. [2022-02-24 01:14:37,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 21 states have internal predecessors, (56), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:37,121 INFO L276 IsEmpty]: Start isEmpty. Operand 2453 states and 3091 transitions. [2022-02-24 01:14:37,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:37,124 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:37,124 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:37,124 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-02-24 01:14:37,124 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:37,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:37,124 INFO L85 PathProgramCache]: Analyzing trace with hash 800949966, now seen corresponding path program 12 times [2022-02-24 01:14:37,124 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:37,125 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517691750] [2022-02-24 01:14:37,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:37,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:37,127 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:37,127 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:37,127 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:37,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:37,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:37,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:37,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517691750] [2022-02-24 01:14:37,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [517691750] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:37,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:37,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:14:37,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646975465] [2022-02-24 01:14:37,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:37,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:14:37,683 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:37,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:14:37,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:14:37,684 INFO L87 Difference]: Start difference. First operand 2453 states and 3091 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:41,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:41,510 INFO L93 Difference]: Finished difference Result 3349 states and 4187 transitions. [2022-02-24 01:14:41,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:14:41,510 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:14:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:41,527 INFO L225 Difference]: With dead ends: 3349 [2022-02-24 01:14:41,527 INFO L226 Difference]: Without dead ends: 2642 [2022-02-24 01:14:41,528 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:14:41,529 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 119 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 318 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 318 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:41,529 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 59 Invalid, 354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 318 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:14:41,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2642 states. [2022-02-24 01:14:44,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2642 to 2615. [2022-02-24 01:14:44,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2615 states, 2610 states have (on average 1.253639846743295) internal successors, (3272), 2610 states have internal predecessors, (3272), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:44,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2615 states to 2615 states and 3276 transitions. [2022-02-24 01:14:44,885 INFO L78 Accepts]: Start accepts. Automaton has 2615 states and 3276 transitions. Word has length 102 [2022-02-24 01:14:44,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:44,885 INFO L470 AbstractCegarLoop]: Abstraction has 2615 states and 3276 transitions. [2022-02-24 01:14:44,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:44,886 INFO L276 IsEmpty]: Start isEmpty. Operand 2615 states and 3276 transitions. [2022-02-24 01:14:44,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:44,889 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:44,889 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:44,889 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-02-24 01:14:44,889 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:44,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:44,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1954191478, now seen corresponding path program 13 times [2022-02-24 01:14:44,890 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:44,890 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [859664730] [2022-02-24 01:14:44,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:44,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:44,892 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:44,892 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:44,892 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:45,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:45,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:45,338 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:45,338 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [859664730] [2022-02-24 01:14:45,338 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [859664730] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:45,338 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:45,338 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:14:45,338 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227162251] [2022-02-24 01:14:45,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:45,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:14:45,339 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:45,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:14:45,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:14:45,339 INFO L87 Difference]: Start difference. First operand 2615 states and 3276 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:49,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:49,728 INFO L93 Difference]: Finished difference Result 4843 states and 6068 transitions. [2022-02-24 01:14:49,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:14:49,729 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2022-02-24 01:14:49,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:49,733 INFO L225 Difference]: With dead ends: 4843 [2022-02-24 01:14:49,733 INFO L226 Difference]: Without dead ends: 2873 [2022-02-24 01:14:49,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:14:49,736 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 174 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 800 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 174 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 852 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 800 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:49,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [174 Valid, 89 Invalid, 852 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 800 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:14:49,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2873 states. [2022-02-24 01:14:53,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2873 to 2684. [2022-02-24 01:14:53,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2684 states, 2679 states have (on average 1.253826054497947) internal successors, (3359), 2679 states have internal predecessors, (3359), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:53,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2684 states to 2684 states and 3363 transitions. [2022-02-24 01:14:53,196 INFO L78 Accepts]: Start accepts. Automaton has 2684 states and 3363 transitions. Word has length 102 [2022-02-24 01:14:53,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:14:53,196 INFO L470 AbstractCegarLoop]: Abstraction has 2684 states and 3363 transitions. [2022-02-24 01:14:53,196 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:53,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2684 states and 3363 transitions. [2022-02-24 01:14:53,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:14:53,200 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:14:53,200 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:14:53,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-02-24 01:14:53,200 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:14:53,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:14:53,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1046987130, now seen corresponding path program 14 times [2022-02-24 01:14:53,200 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:14:53,200 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [46749685] [2022-02-24 01:14:53,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:14:53,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:14:53,203 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:14:53,203 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:14:53,203 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:14:53,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:53,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:14:53,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:14:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:14:53,634 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:14:53,634 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [46749685] [2022-02-24 01:14:53,635 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [46749685] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:14:53,635 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:14:53,635 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:14:53,635 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316021291] [2022-02-24 01:14:53,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:14:53,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:14:53,635 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:14:53,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:14:53,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:14:53,636 INFO L87 Difference]: Start difference. First operand 2684 states and 3363 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:14:57,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:14:57,682 INFO L93 Difference]: Finished difference Result 4412 states and 5523 transitions. [2022-02-24 01:14:57,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:14:57,683 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 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 102 [2022-02-24 01:14:57,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:14:57,686 INFO L225 Difference]: With dead ends: 4412 [2022-02-24 01:14:57,686 INFO L226 Difference]: Without dead ends: 2724 [2022-02-24 01:14:57,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:14:57,689 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 178 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 567 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 178 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 627 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 567 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:14:57,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [178 Valid, 65 Invalid, 627 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 567 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:14:57,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2724 states. [2022-02-24 01:15:01,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2724 to 2714. [2022-02-24 01:15:01,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2714 states, 2709 states have (on average 1.2476928755998524) internal successors, (3380), 2709 states have internal predecessors, (3380), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:01,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2714 states to 2714 states and 3384 transitions. [2022-02-24 01:15:01,210 INFO L78 Accepts]: Start accepts. Automaton has 2714 states and 3384 transitions. Word has length 102 [2022-02-24 01:15:01,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:01,210 INFO L470 AbstractCegarLoop]: Abstraction has 2714 states and 3384 transitions. [2022-02-24 01:15:01,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 13 states have internal predecessors, (49), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:01,211 INFO L276 IsEmpty]: Start isEmpty. Operand 2714 states and 3384 transitions. [2022-02-24 01:15:01,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:15:01,230 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:01,230 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:01,230 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-02-24 01:15:01,230 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:01,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:01,230 INFO L85 PathProgramCache]: Analyzing trace with hash 491352900, now seen corresponding path program 15 times [2022-02-24 01:15:01,230 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:01,230 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1957967122] [2022-02-24 01:15:01,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:01,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:01,233 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:01,233 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:01,233 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:01,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:01,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:01,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:01,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:01,675 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:01,675 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1957967122] [2022-02-24 01:15:01,675 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1957967122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:01,675 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:01,675 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:15:01,675 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427442505] [2022-02-24 01:15:01,675 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:01,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:15:01,676 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:01,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:15:01,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:15:01,676 INFO L87 Difference]: Start difference. First operand 2714 states and 3384 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:05,887 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:05,888 INFO L93 Difference]: Finished difference Result 4494 states and 5595 transitions. [2022-02-24 01:15:05,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:15:05,888 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:15:05,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:05,892 INFO L225 Difference]: With dead ends: 4494 [2022-02-24 01:15:05,892 INFO L226 Difference]: Without dead ends: 2753 [2022-02-24 01:15:05,895 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:15:05,897 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 133 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 688 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 731 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 688 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:05,897 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 90 Invalid, 731 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 688 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:15:05,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2753 states. [2022-02-24 01:15:09,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2753 to 2675. [2022-02-24 01:15:09,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2675 states, 2670 states have (on average 1.247940074906367) internal successors, (3332), 2670 states have internal predecessors, (3332), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:09,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2675 states to 2675 states and 3336 transitions. [2022-02-24 01:15:09,415 INFO L78 Accepts]: Start accepts. Automaton has 2675 states and 3336 transitions. Word has length 102 [2022-02-24 01:15:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:09,416 INFO L470 AbstractCegarLoop]: Abstraction has 2675 states and 3336 transitions. [2022-02-24 01:15:09,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 2675 states and 3336 transitions. [2022-02-24 01:15:09,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:15:09,419 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:09,420 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:09,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-02-24 01:15:09,420 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:09,420 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:09,420 INFO L85 PathProgramCache]: Analyzing trace with hash -1213109560, now seen corresponding path program 16 times [2022-02-24 01:15:09,420 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:09,420 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1063404318] [2022-02-24 01:15:09,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:09,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:09,422 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:09,423 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:09,423 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:09,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:10,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:10,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:10,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:10,700 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:10,700 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1063404318] [2022-02-24 01:15:10,700 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1063404318] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:10,700 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:10,700 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:15:10,700 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746560461] [2022-02-24 01:15:10,700 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:10,700 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:15:10,700 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:10,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:15:10,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:15:10,701 INFO L87 Difference]: Start difference. First operand 2675 states and 3336 transitions. Second operand has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:16,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:16,165 INFO L93 Difference]: Finished difference Result 4189 states and 5245 transitions. [2022-02-24 01:15:16,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:15:16,165 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:15:16,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:16,170 INFO L225 Difference]: With dead ends: 4189 [2022-02-24 01:15:16,170 INFO L226 Difference]: Without dead ends: 3272 [2022-02-24 01:15:16,171 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=366, Invalid=1440, Unknown=0, NotChecked=0, Total=1806 [2022-02-24 01:15:16,171 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 263 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 943 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 263 SdHoareTripleChecker+Valid, 54 SdHoareTripleChecker+Invalid, 1007 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:16,172 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [263 Valid, 54 Invalid, 1007 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 943 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:15:16,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3272 states. [2022-02-24 01:15:19,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3272 to 2497. [2022-02-24 01:15:19,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2497 states, 2492 states have (on average 1.2359550561797752) internal successors, (3080), 2492 states have internal predecessors, (3080), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:19,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2497 states to 2497 states and 3084 transitions. [2022-02-24 01:15:19,445 INFO L78 Accepts]: Start accepts. Automaton has 2497 states and 3084 transitions. Word has length 102 [2022-02-24 01:15:19,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:19,446 INFO L470 AbstractCegarLoop]: Abstraction has 2497 states and 3084 transitions. [2022-02-24 01:15:19,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.590909090909091) internal successors, (57), 21 states have internal predecessors, (57), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:19,446 INFO L276 IsEmpty]: Start isEmpty. Operand 2497 states and 3084 transitions. [2022-02-24 01:15:19,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:15:19,449 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:19,449 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:19,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-02-24 01:15:19,449 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:19,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:19,449 INFO L85 PathProgramCache]: Analyzing trace with hash -742749626, now seen corresponding path program 17 times [2022-02-24 01:15:19,449 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:19,449 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1784122510] [2022-02-24 01:15:19,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:19,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:19,452 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:19,452 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:19,452 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:19,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:20,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:20,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:20,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:20,015 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:20,015 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1784122510] [2022-02-24 01:15:20,015 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1784122510] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:20,015 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:20,016 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:15:20,016 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844355463] [2022-02-24 01:15:20,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:20,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:15:20,017 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:20,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:15:20,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:15:20,017 INFO L87 Difference]: Start difference. First operand 2497 states and 3084 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:24,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:24,647 INFO L93 Difference]: Finished difference Result 3207 states and 3987 transitions. [2022-02-24 01:15:24,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:15:24,647 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:15:24,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:24,651 INFO L225 Difference]: With dead ends: 3207 [2022-02-24 01:15:24,651 INFO L226 Difference]: Without dead ends: 2822 [2022-02-24 01:15:24,652 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=124, Invalid=806, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:15:24,652 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 107 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 1040 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 1040 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:24,652 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 93 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 1040 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:15:24,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2822 states. [2022-02-24 01:15:28,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2822 to 2722. [2022-02-24 01:15:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2722 states, 2717 states have (on average 1.2384983437615016) internal successors, (3365), 2717 states have internal predecessors, (3365), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:28,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2722 states to 2722 states and 3369 transitions. [2022-02-24 01:15:28,346 INFO L78 Accepts]: Start accepts. Automaton has 2722 states and 3369 transitions. Word has length 102 [2022-02-24 01:15:28,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:28,347 INFO L470 AbstractCegarLoop]: Abstraction has 2722 states and 3369 transitions. [2022-02-24 01:15:28,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:28,347 INFO L276 IsEmpty]: Start isEmpty. Operand 2722 states and 3369 transitions. [2022-02-24 01:15:28,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:15:28,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:28,353 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:28,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-02-24 01:15:28,354 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:28,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:28,354 INFO L85 PathProgramCache]: Analyzing trace with hash -1135776636, now seen corresponding path program 18 times [2022-02-24 01:15:28,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:28,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1173004395] [2022-02-24 01:15:28,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:28,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:28,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:28,356 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:28,357 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:29,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:29,240 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:29,240 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1173004395] [2022-02-24 01:15:29,240 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1173004395] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:29,240 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:29,240 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:15:29,240 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775342036] [2022-02-24 01:15:29,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:29,240 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:15:29,240 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:29,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:15:29,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=450, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:15:29,241 INFO L87 Difference]: Start difference. First operand 2722 states and 3369 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:36,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:36,320 INFO L93 Difference]: Finished difference Result 4697 states and 5853 transitions. [2022-02-24 01:15:36,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:15:36,321 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 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 102 [2022-02-24 01:15:36,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:36,326 INFO L225 Difference]: With dead ends: 4697 [2022-02-24 01:15:36,326 INFO L226 Difference]: Without dead ends: 4192 [2022-02-24 01:15:36,327 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1927, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:15:36,327 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 166 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 1424 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1424 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:36,328 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [166 Valid, 123 Invalid, 1498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1424 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:15:36,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2022-02-24 01:15:42,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 4133. [2022-02-24 01:15:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4133 states, 4128 states have (on average 1.2415213178294573) internal successors, (5125), 4128 states have internal predecessors, (5125), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:42,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4133 states to 4133 states and 5129 transitions. [2022-02-24 01:15:42,041 INFO L78 Accepts]: Start accepts. Automaton has 4133 states and 5129 transitions. Word has length 102 [2022-02-24 01:15:42,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:42,041 INFO L470 AbstractCegarLoop]: Abstraction has 4133 states and 5129 transitions. [2022-02-24 01:15:42,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:42,041 INFO L276 IsEmpty]: Start isEmpty. Operand 4133 states and 5129 transitions. [2022-02-24 01:15:42,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:15:42,045 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:42,045 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:42,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-02-24 01:15:42,045 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:42,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:42,046 INFO L85 PathProgramCache]: Analyzing trace with hash -916921918, now seen corresponding path program 19 times [2022-02-24 01:15:42,046 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:42,046 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1696420427] [2022-02-24 01:15:42,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:42,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:42,048 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:42,048 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:42,048 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:42,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:42,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:42,683 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:42,683 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1696420427] [2022-02-24 01:15:42,683 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1696420427] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:42,683 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:42,683 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:15:42,683 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398116795] [2022-02-24 01:15:42,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:42,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:15:42,684 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:42,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:15:42,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:15:42,684 INFO L87 Difference]: Start difference. First operand 4133 states and 5129 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:49,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:15:49,339 INFO L93 Difference]: Finished difference Result 5164 states and 6445 transitions. [2022-02-24 01:15:49,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:15:49,343 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-24 01:15:49,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:15:49,348 INFO L225 Difference]: With dead ends: 5164 [2022-02-24 01:15:49,348 INFO L226 Difference]: Without dead ends: 4237 [2022-02-24 01:15:49,349 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:15:49,349 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 104 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 916 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 916 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:15:49,350 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 91 Invalid, 951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 916 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:15:49,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2022-02-24 01:15:54,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3911. [2022-02-24 01:15:54,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3911 states, 3906 states have (on average 1.2386072708653353) internal successors, (4838), 3906 states have internal predecessors, (4838), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:54,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3911 states to 3911 states and 4842 transitions. [2022-02-24 01:15:54,918 INFO L78 Accepts]: Start accepts. Automaton has 3911 states and 4842 transitions. Word has length 102 [2022-02-24 01:15:54,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:15:54,919 INFO L470 AbstractCegarLoop]: Abstraction has 3911 states and 4842 transitions. [2022-02-24 01:15:54,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:15:54,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3911 states and 4842 transitions. [2022-02-24 01:15:54,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:15:54,922 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:15:54,923 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:15:54,923 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-02-24 01:15:54,923 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:15:54,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:15:54,923 INFO L85 PathProgramCache]: Analyzing trace with hash -602201016, now seen corresponding path program 20 times [2022-02-24 01:15:54,923 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:15:54,923 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485105548] [2022-02-24 01:15:54,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:15:54,924 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:15:54,926 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:15:54,926 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:15:54,926 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:15:54,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:56,752 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:15:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:15:56,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:15:56,755 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:15:56,755 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485105548] [2022-02-24 01:15:56,755 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485105548] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:15:56,755 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:15:56,755 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-24 01:15:56,755 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062450357] [2022-02-24 01:15:56,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:15:56,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-24 01:15:56,755 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:15:56,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-24 01:15:56,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:15:56,756 INFO L87 Difference]: Start difference. First operand 3911 states and 4842 transitions. Second operand has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:05,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:05,952 INFO L93 Difference]: Finished difference Result 5131 states and 6413 transitions. [2022-02-24 01:16:05,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-24 01:16:05,953 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:16:05,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:05,958 INFO L225 Difference]: With dead ends: 5131 [2022-02-24 01:16:05,958 INFO L226 Difference]: Without dead ends: 4872 [2022-02-24 01:16:05,959 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=488, Invalid=2818, Unknown=0, NotChecked=0, Total=3306 [2022-02-24 01:16:05,959 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 346 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1822 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 346 SdHoareTripleChecker+Valid, 109 SdHoareTripleChecker+Invalid, 1917 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 1822 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:05,959 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [346 Valid, 109 Invalid, 1917 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 1822 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-24 01:16:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4872 states. [2022-02-24 01:16:11,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4872 to 3932. [2022-02-24 01:16:11,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3927 states have (on average 1.2388591800356505) internal successors, (4865), 3927 states have internal predecessors, (4865), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:11,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 4869 transitions. [2022-02-24 01:16:11,574 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 4869 transitions. Word has length 102 [2022-02-24 01:16:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:11,574 INFO L470 AbstractCegarLoop]: Abstraction has 3932 states and 4869 transitions. [2022-02-24 01:16:11,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.5517241379310347) internal successors, (74), 28 states have internal predecessors, (74), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:11,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 4869 transitions. [2022-02-24 01:16:11,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:16:11,578 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:11,578 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:11,578 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-02-24 01:16:11,578 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:11,578 INFO L85 PathProgramCache]: Analyzing trace with hash -995228026, now seen corresponding path program 21 times [2022-02-24 01:16:11,578 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:11,578 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2043344558] [2022-02-24 01:16:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:11,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:11,581 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:11,581 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:11,581 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:11,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:12,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:12,913 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:12,913 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2043344558] [2022-02-24 01:16:12,913 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2043344558] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:12,913 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:12,913 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:16:12,914 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [507397717] [2022-02-24 01:16:12,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:12,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:16:12,914 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:12,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:16:12,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:16:12,914 INFO L87 Difference]: Start difference. First operand 3932 states and 4869 transitions. Second operand has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:20,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:20,875 INFO L93 Difference]: Finished difference Result 5380 states and 6702 transitions. [2022-02-24 01:16:20,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:16:20,876 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:16:20,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:20,880 INFO L225 Difference]: With dead ends: 5380 [2022-02-24 01:16:20,880 INFO L226 Difference]: Without dead ends: 4702 [2022-02-24 01:16:20,882 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:16:20,882 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 262 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 1010 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 262 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 1075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 1010 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:20,882 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [262 Valid, 76 Invalid, 1075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 1010 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:16:20,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4702 states. [2022-02-24 01:16:26,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4702 to 3816. [2022-02-24 01:16:26,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3811 states have (on average 1.2374704801889267) internal successors, (4716), 3811 states have internal predecessors, (4716), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:26,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 4720 transitions. [2022-02-24 01:16:26,212 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 4720 transitions. Word has length 102 [2022-02-24 01:16:26,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:26,212 INFO L470 AbstractCegarLoop]: Abstraction has 3816 states and 4720 transitions. [2022-02-24 01:16:26,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 23 states have internal predecessors, (62), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:26,212 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 4720 transitions. [2022-02-24 01:16:26,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:16:26,216 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:26,216 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:26,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-02-24 01:16:26,216 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:26,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:26,216 INFO L85 PathProgramCache]: Analyzing trace with hash -802128058, now seen corresponding path program 22 times [2022-02-24 01:16:26,216 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:26,216 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2119501099] [2022-02-24 01:16:26,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:26,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:26,219 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:26,219 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:26,219 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:26,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:26,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:26,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:26,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:26,792 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:26,792 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2119501099] [2022-02-24 01:16:26,792 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2119501099] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:26,792 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:26,792 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:16:26,792 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586593633] [2022-02-24 01:16:26,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:26,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:16:26,793 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:26,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:16:26,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:16:26,793 INFO L87 Difference]: Start difference. First operand 3816 states and 4720 transitions. Second operand has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:33,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:33,049 INFO L93 Difference]: Finished difference Result 5220 states and 6444 transitions. [2022-02-24 01:16:33,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:16:33,049 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:16:33,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:33,053 INFO L225 Difference]: With dead ends: 5220 [2022-02-24 01:16:33,053 INFO L226 Difference]: Without dead ends: 4054 [2022-02-24 01:16:33,055 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=93, Invalid=369, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:16:33,055 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 88 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 403 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 431 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 403 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:33,055 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 76 Invalid, 431 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 403 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:16:33,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4054 states. [2022-02-24 01:16:38,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4054 to 4020. [2022-02-24 01:16:38,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4020 states, 4015 states have (on average 1.228642590286426) internal successors, (4933), 4015 states have internal predecessors, (4933), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:38,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4020 states to 4020 states and 4937 transitions. [2022-02-24 01:16:38,850 INFO L78 Accepts]: Start accepts. Automaton has 4020 states and 4937 transitions. Word has length 102 [2022-02-24 01:16:38,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:38,850 INFO L470 AbstractCegarLoop]: Abstraction has 4020 states and 4937 transitions. [2022-02-24 01:16:38,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.4615384615384617) internal successors, (45), 12 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:38,850 INFO L276 IsEmpty]: Start isEmpty. Operand 4020 states and 4937 transitions. [2022-02-24 01:16:38,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:16:38,855 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:38,855 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 6, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:38,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-02-24 01:16:38,855 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:38,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:38,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1076879158, now seen corresponding path program 23 times [2022-02-24 01:16:38,855 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:38,855 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [976340256] [2022-02-24 01:16:38,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:38,856 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:38,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:38,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:38,859 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:38,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:39,326 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:39,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:39,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:39,334 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:39,334 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [976340256] [2022-02-24 01:16:39,334 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [976340256] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:39,334 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:39,334 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:16:39,334 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349595715] [2022-02-24 01:16:39,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:39,334 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:16:39,334 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:39,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:16:39,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:16:39,335 INFO L87 Difference]: Start difference. First operand 4020 states and 4937 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:46,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:46,122 INFO L93 Difference]: Finished difference Result 7113 states and 8772 transitions. [2022-02-24 01:16:46,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:16:46,122 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 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 102 [2022-02-24 01:16:46,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:46,127 INFO L225 Difference]: With dead ends: 7113 [2022-02-24 01:16:46,127 INFO L226 Difference]: Without dead ends: 4246 [2022-02-24 01:16:46,130 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:16:46,130 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 130 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:46,130 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 91 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:16:46,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4246 states. [2022-02-24 01:16:52,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4246 to 4083. [2022-02-24 01:16:52,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4083 states, 4078 states have (on average 1.2290338401177048) internal successors, (5012), 4078 states have internal predecessors, (5012), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:52,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4083 states to 4083 states and 5016 transitions. [2022-02-24 01:16:52,045 INFO L78 Accepts]: Start accepts. Automaton has 4083 states and 5016 transitions. Word has length 102 [2022-02-24 01:16:52,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:16:52,046 INFO L470 AbstractCegarLoop]: Abstraction has 4083 states and 5016 transitions. [2022-02-24 01:16:52,046 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 14 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:52,046 INFO L276 IsEmpty]: Start isEmpty. Operand 4083 states and 5016 transitions. [2022-02-24 01:16:52,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:16:52,050 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:16:52,050 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:16:52,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-02-24 01:16:52,050 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:16:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:16:52,051 INFO L85 PathProgramCache]: Analyzing trace with hash -169674810, now seen corresponding path program 24 times [2022-02-24 01:16:52,051 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:16:52,051 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1578085838] [2022-02-24 01:16:52,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:16:52,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:16:52,054 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:16:52,054 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:16:52,054 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:16:52,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:52,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:16:52,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:16:52,564 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:16:52,565 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:16:52,565 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1578085838] [2022-02-24 01:16:52,565 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1578085838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:16:52,565 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:16:52,565 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:16:52,565 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775169949] [2022-02-24 01:16:52,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:16:52,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:16:52,565 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:16:52,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:16:52,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:16:52,565 INFO L87 Difference]: Start difference. First operand 4083 states and 5016 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:16:59,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:16:59,230 INFO L93 Difference]: Finished difference Result 6692 states and 8254 transitions. [2022-02-24 01:16:59,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:16:59,231 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:16:59,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:16:59,243 INFO L225 Difference]: With dead ends: 6692 [2022-02-24 01:16:59,243 INFO L226 Difference]: Without dead ends: 4129 [2022-02-24 01:16:59,246 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:16:59,246 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 147 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 730 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 147 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 780 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 730 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:16:59,247 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [147 Valid, 89 Invalid, 780 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 730 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:16:59,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2022-02-24 01:17:04,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 4050. [2022-02-24 01:17:04,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4050 states, 4045 states have (on average 1.226946847960445) internal successors, (4963), 4045 states have internal predecessors, (4963), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:05,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4050 states to 4050 states and 4967 transitions. [2022-02-24 01:17:05,000 INFO L78 Accepts]: Start accepts. Automaton has 4050 states and 4967 transitions. Word has length 102 [2022-02-24 01:17:05,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:05,000 INFO L470 AbstractCegarLoop]: Abstraction has 4050 states and 4967 transitions. [2022-02-24 01:17:05,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:05,001 INFO L276 IsEmpty]: Start isEmpty. Operand 4050 states and 4967 transitions. [2022-02-24 01:17:05,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:17:05,005 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:05,005 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:05,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-02-24 01:17:05,006 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:05,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:05,006 INFO L85 PathProgramCache]: Analyzing trace with hash -1874137270, now seen corresponding path program 25 times [2022-02-24 01:17:05,006 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:05,006 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1510772968] [2022-02-24 01:17:05,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:05,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:05,009 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:05,009 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:05,009 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:05,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:06,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:06,359 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:06,359 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:06,359 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1510772968] [2022-02-24 01:17:06,359 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1510772968] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:06,359 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:06,359 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-24 01:17:06,359 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834464166] [2022-02-24 01:17:06,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:06,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-24 01:17:06,360 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:06,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-24 01:17:06,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:17:06,360 INFO L87 Difference]: Start difference. First operand 4050 states and 4967 transitions. Second operand has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:14,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:14,929 INFO L93 Difference]: Finished difference Result 5824 states and 7211 transitions. [2022-02-24 01:17:14,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-24 01:17:14,929 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:17:14,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:14,934 INFO L225 Difference]: With dead ends: 5824 [2022-02-24 01:17:14,934 INFO L226 Difference]: Without dead ends: 4946 [2022-02-24 01:17:14,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 478 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=418, Invalid=1838, Unknown=0, NotChecked=0, Total=2256 [2022-02-24 01:17:14,936 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 208 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 1243 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 1297 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 1243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:14,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 97 Invalid, 1297 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 1243 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:17:14,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4946 states. [2022-02-24 01:17:20,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4946 to 3813. [2022-02-24 01:17:20,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3813 states, 3808 states have (on average 1.221638655462185) internal successors, (4652), 3808 states have internal predecessors, (4652), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:20,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3813 states to 3813 states and 4656 transitions. [2022-02-24 01:17:20,372 INFO L78 Accepts]: Start accepts. Automaton has 3813 states and 4656 transitions. Word has length 102 [2022-02-24 01:17:20,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:20,372 INFO L470 AbstractCegarLoop]: Abstraction has 3813 states and 4656 transitions. [2022-02-24 01:17:20,372 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.625) internal successors, (63), 23 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:20,373 INFO L276 IsEmpty]: Start isEmpty. Operand 3813 states and 4656 transitions. [2022-02-24 01:17:20,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:17:20,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:20,376 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:20,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-02-24 01:17:20,376 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:20,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:20,377 INFO L85 PathProgramCache]: Analyzing trace with hash -753755636, now seen corresponding path program 26 times [2022-02-24 01:17:20,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:20,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453838283] [2022-02-24 01:17:20,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:20,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:20,379 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:20,379 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:20,379 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:20,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:22,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:22,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:22,348 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:22,348 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453838283] [2022-02-24 01:17:22,348 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453838283] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:22,348 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:22,348 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-24 01:17:22,348 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621399626] [2022-02-24 01:17:22,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:22,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-24 01:17:22,348 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:22,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-24 01:17:22,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=773, Unknown=0, NotChecked=0, Total=870 [2022-02-24 01:17:22,349 INFO L87 Difference]: Start difference. First operand 3813 states and 4656 transitions. Second operand has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:32,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:32,485 INFO L93 Difference]: Finished difference Result 5522 states and 6839 transitions. [2022-02-24 01:17:32,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-24 01:17:32,499 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:17:32,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:32,504 INFO L225 Difference]: With dead ends: 5522 [2022-02-24 01:17:32,504 INFO L226 Difference]: Without dead ends: 5275 [2022-02-24 01:17:32,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 795 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=525, Invalid=3135, Unknown=0, NotChecked=0, Total=3660 [2022-02-24 01:17:32,506 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 313 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 2151 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 2237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 2151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:32,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [313 Valid, 127 Invalid, 2237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 2151 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-24 01:17:32,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5275 states. [2022-02-24 01:17:38,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5275 to 4120. [2022-02-24 01:17:38,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4120 states, 4115 states have (on average 1.2182260024301337) internal successors, (5013), 4115 states have internal predecessors, (5013), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:38,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4120 states to 4120 states and 5017 transitions. [2022-02-24 01:17:38,338 INFO L78 Accepts]: Start accepts. Automaton has 4120 states and 5017 transitions. Word has length 102 [2022-02-24 01:17:38,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:38,339 INFO L470 AbstractCegarLoop]: Abstraction has 4120 states and 5017 transitions. [2022-02-24 01:17:38,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.566666666666667) internal successors, (77), 29 states have internal predecessors, (77), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:38,339 INFO L276 IsEmpty]: Start isEmpty. Operand 4120 states and 5017 transitions. [2022-02-24 01:17:38,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:17:38,343 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:38,343 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:38,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-02-24 01:17:38,343 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:38,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:38,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1146782646, now seen corresponding path program 27 times [2022-02-24 01:17:38,343 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:38,343 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1350066387] [2022-02-24 01:17:38,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:38,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:38,346 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:38,346 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:38,346 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:38,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:38,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:38,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:38,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:38,943 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:38,943 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1350066387] [2022-02-24 01:17:38,943 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1350066387] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:38,943 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:38,943 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:17:38,943 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853931155] [2022-02-24 01:17:38,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:38,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:17:38,943 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:38,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:17:38,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=206, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:17:38,943 INFO L87 Difference]: Start difference. First operand 4120 states and 5017 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:46,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:17:46,384 INFO L93 Difference]: Finished difference Result 5332 states and 6549 transitions. [2022-02-24 01:17:46,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:17:46,384 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-24 01:17:46,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:17:46,389 INFO L225 Difference]: With dead ends: 5332 [2022-02-24 01:17:46,389 INFO L226 Difference]: Without dead ends: 4546 [2022-02-24 01:17:46,390 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=116, Invalid=696, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:17:46,390 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 118 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 957 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 89 SdHoareTripleChecker+Invalid, 996 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 957 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:17:46,390 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [118 Valid, 89 Invalid, 996 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 957 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:17:46,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4546 states. [2022-02-24 01:17:52,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4546 to 4390. [2022-02-24 01:17:52,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4390 states, 4385 states have (on average 1.2150513112884835) internal successors, (5328), 4385 states have internal predecessors, (5328), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:52,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4390 states to 4390 states and 5332 transitions. [2022-02-24 01:17:52,719 INFO L78 Accepts]: Start accepts. Automaton has 4390 states and 5332 transitions. Word has length 102 [2022-02-24 01:17:52,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:17:52,719 INFO L470 AbstractCegarLoop]: Abstraction has 4390 states and 5332 transitions. [2022-02-24 01:17:52,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:17:52,719 INFO L276 IsEmpty]: Start isEmpty. Operand 4390 states and 5332 transitions. [2022-02-24 01:17:52,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:17:52,722 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:17:52,723 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:17:52,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-02-24 01:17:52,723 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:17:52,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:17:52,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1514733942, now seen corresponding path program 28 times [2022-02-24 01:17:52,723 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:17:52,723 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1253024934] [2022-02-24 01:17:52,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:17:52,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:17:52,726 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:17:52,726 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:17:52,726 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:17:52,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:53,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:17:53,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:17:53,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:17:53,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:17:53,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1253024934] [2022-02-24 01:17:53,963 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1253024934] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:17:53,963 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:17:53,963 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-24 01:17:53,963 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518648781] [2022-02-24 01:17:53,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:17:53,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-24 01:17:53,963 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:17:53,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-24 01:17:53,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:17:53,963 INFO L87 Difference]: Start difference. First operand 4390 states and 5332 transitions. Second operand has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:08,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:08,633 INFO L93 Difference]: Finished difference Result 10693 states and 13214 transitions. [2022-02-24 01:18:08,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:18:08,633 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:18:08,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:08,642 INFO L225 Difference]: With dead ends: 10693 [2022-02-24 01:18:08,642 INFO L226 Difference]: Without dead ends: 9170 [2022-02-24 01:18:08,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=284, Invalid=1276, Unknown=0, NotChecked=0, Total=1560 [2022-02-24 01:18:08,645 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 342 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 899 mSolverCounterSat, 91 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 342 SdHoareTripleChecker+Valid, 80 SdHoareTripleChecker+Invalid, 990 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 91 IncrementalHoareTripleChecker+Valid, 899 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:08,645 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [342 Valid, 80 Invalid, 990 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [91 Valid, 899 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:18:08,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9170 states. [2022-02-24 01:18:17,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9170 to 5842. [2022-02-24 01:18:17,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5842 states, 5837 states have (on average 1.2122665752955286) internal successors, (7076), 5837 states have internal predecessors, (7076), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:17,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5842 states to 5842 states and 7080 transitions. [2022-02-24 01:18:17,068 INFO L78 Accepts]: Start accepts. Automaton has 5842 states and 7080 transitions. Word has length 102 [2022-02-24 01:18:17,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:17,068 INFO L470 AbstractCegarLoop]: Abstraction has 5842 states and 7080 transitions. [2022-02-24 01:18:17,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0) internal successors, (66), 21 states have internal predecessors, (66), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:17,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5842 states and 7080 transitions. [2022-02-24 01:18:17,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:18:17,072 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:17,072 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:17,072 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-02-24 01:18:17,072 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:17,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:17,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1031988786, now seen corresponding path program 29 times [2022-02-24 01:18:17,073 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:17,073 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [296437981] [2022-02-24 01:18:17,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:17,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:17,075 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:17,075 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:17,075 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:17,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:17,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:17,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:17,661 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:17,661 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [296437981] [2022-02-24 01:18:17,661 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [296437981] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:17,661 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:17,661 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:18:17,661 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631537318] [2022-02-24 01:18:17,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:17,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:18:17,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:17,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:18:17,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:18:17,661 INFO L87 Difference]: Start difference. First operand 5842 states and 7080 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:27,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:27,318 INFO L93 Difference]: Finished difference Result 9631 states and 11721 transitions. [2022-02-24 01:18:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:18:27,318 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:18:27,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:27,325 INFO L225 Difference]: With dead ends: 9631 [2022-02-24 01:18:27,325 INFO L226 Difference]: Without dead ends: 6280 [2022-02-24 01:18:27,329 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:18:27,329 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 88 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 479 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 479 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:27,329 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [88 Valid, 81 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 479 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:18:27,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6280 states. [2022-02-24 01:18:36,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6280 to 6184. [2022-02-24 01:18:36,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6184 states, 6179 states have (on average 1.2037546528564493) internal successors, (7438), 6179 states have internal predecessors, (7438), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:36,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6184 states to 6184 states and 7442 transitions. [2022-02-24 01:18:36,349 INFO L78 Accepts]: Start accepts. Automaton has 6184 states and 7442 transitions. Word has length 102 [2022-02-24 01:18:36,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:18:36,349 INFO L470 AbstractCegarLoop]: Abstraction has 6184 states and 7442 transitions. [2022-02-24 01:18:36,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 13 states have internal predecessors, (48), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:36,349 INFO L276 IsEmpty]: Start isEmpty. Operand 6184 states and 7442 transitions. [2022-02-24 01:18:36,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:18:36,353 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:18:36,353 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 5, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:18:36,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-02-24 01:18:36,353 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:18:36,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:18:36,354 INFO L85 PathProgramCache]: Analyzing trace with hash 995036492, now seen corresponding path program 30 times [2022-02-24 01:18:36,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:18:36,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1762183351] [2022-02-24 01:18:36,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:18:36,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:18:36,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:18:36,356 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:18:36,356 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:18:36,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:18:38,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:18:38,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:18:38,518 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:18:38,518 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1762183351] [2022-02-24 01:18:38,518 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1762183351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:18:38,518 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:18:38,518 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-24 01:18:38,518 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282771445] [2022-02-24 01:18:38,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:18:38,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-24 01:18:38,518 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:18:38,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-24 01:18:38,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=887, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:18:38,519 INFO L87 Difference]: Start difference. First operand 6184 states and 7442 transitions. Second operand has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:18:54,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:18:54,314 INFO L93 Difference]: Finished difference Result 8897 states and 10811 transitions. [2022-02-24 01:18:54,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-24 01:18:54,315 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:18:54,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:18:54,324 INFO L225 Difference]: With dead ends: 8897 [2022-02-24 01:18:54,324 INFO L226 Difference]: Without dead ends: 8614 [2022-02-24 01:18:54,325 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 988 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=593, Invalid=3829, Unknown=0, NotChecked=0, Total=4422 [2022-02-24 01:18:54,325 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 343 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 2529 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 343 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 2634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2529 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:18:54,326 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [343 Valid, 120 Invalid, 2634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2529 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-24 01:18:54,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8614 states. [2022-02-24 01:19:03,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8614 to 6499. [2022-02-24 01:19:03,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6499 states, 6494 states have (on average 1.2052663997536188) internal successors, (7827), 6494 states have internal predecessors, (7827), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:03,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6499 states to 6499 states and 7831 transitions. [2022-02-24 01:19:03,864 INFO L78 Accepts]: Start accepts. Automaton has 6499 states and 7831 transitions. Word has length 102 [2022-02-24 01:19:03,864 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:03,864 INFO L470 AbstractCegarLoop]: Abstraction has 6499 states and 7831 transitions. [2022-02-24 01:19:03,864 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.5) internal successors, (80), 31 states have internal predecessors, (80), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:03,865 INFO L276 IsEmpty]: Start isEmpty. Operand 6499 states and 7831 transitions. [2022-02-24 01:19:03,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:19:03,869 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:03,869 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:03,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-02-24 01:19:03,869 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:03,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:03,869 INFO L85 PathProgramCache]: Analyzing trace with hash 602009482, now seen corresponding path program 31 times [2022-02-24 01:19:03,869 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:03,869 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [163525139] [2022-02-24 01:19:03,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:03,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:03,872 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:03,872 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:03,872 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:04,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:04,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:04,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:04,297 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:04,297 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [163525139] [2022-02-24 01:19:04,298 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [163525139] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:04,298 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:04,298 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:19:04,298 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059040401] [2022-02-24 01:19:04,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:04,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:19:04,298 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:04,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:19:04,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:19:04,298 INFO L87 Difference]: Start difference. First operand 6499 states and 7831 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:14,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:14,035 INFO L93 Difference]: Finished difference Result 9817 states and 11910 transitions. [2022-02-24 01:19:14,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:19:14,035 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2022-02-24 01:19:14,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:14,041 INFO L225 Difference]: With dead ends: 9817 [2022-02-24 01:19:14,041 INFO L226 Difference]: Without dead ends: 6114 [2022-02-24 01:19:14,046 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=631, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:19:14,046 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 193 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:14,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [193 Valid, 101 Invalid, 960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 894 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:19:14,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6114 states. [2022-02-24 01:19:22,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6114 to 5993. [2022-02-24 01:19:22,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5993 states, 5988 states have (on average 1.204241816967268) internal successors, (7211), 5988 states have internal predecessors, (7211), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:22,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5993 states to 5993 states and 7215 transitions. [2022-02-24 01:19:22,921 INFO L78 Accepts]: Start accepts. Automaton has 5993 states and 7215 transitions. Word has length 102 [2022-02-24 01:19:22,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:22,921 INFO L470 AbstractCegarLoop]: Abstraction has 5993 states and 7215 transitions. [2022-02-24 01:19:22,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:22,921 INFO L276 IsEmpty]: Start isEmpty. Operand 5993 states and 7215 transitions. [2022-02-24 01:19:22,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:19:22,926 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:22,926 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:22,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-02-24 01:19:22,926 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:22,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:22,926 INFO L85 PathProgramCache]: Analyzing trace with hash 1902240840, now seen corresponding path program 32 times [2022-02-24 01:19:22,926 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:22,926 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1654550957] [2022-02-24 01:19:22,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:22,927 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:22,929 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:22,929 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:22,929 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:22,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:23,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:23,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:23,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:23,473 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:23,473 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1654550957] [2022-02-24 01:19:23,473 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1654550957] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:23,473 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:23,473 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:19:23,473 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089981243] [2022-02-24 01:19:23,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:23,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:19:23,473 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:23,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:19:23,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:19:23,474 INFO L87 Difference]: Start difference. First operand 5993 states and 7215 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:33,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:33,592 INFO L93 Difference]: Finished difference Result 7117 states and 8634 transitions. [2022-02-24 01:19:33,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:19:33,592 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:19:33,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:33,598 INFO L225 Difference]: With dead ends: 7117 [2022-02-24 01:19:33,598 INFO L226 Difference]: Without dead ends: 6226 [2022-02-24 01:19:33,600 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:19:33,600 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 113 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1098 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1135 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 1098 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:33,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 110 Invalid, 1135 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 1098 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:19:33,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6226 states. [2022-02-24 01:19:42,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6226 to 5723. [2022-02-24 01:19:42,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5723 states, 5718 states have (on average 1.2061909758656872) internal successors, (6897), 5718 states have internal predecessors, (6897), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:42,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5723 states to 5723 states and 6901 transitions. [2022-02-24 01:19:42,096 INFO L78 Accepts]: Start accepts. Automaton has 5723 states and 6901 transitions. Word has length 102 [2022-02-24 01:19:42,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:19:42,096 INFO L470 AbstractCegarLoop]: Abstraction has 5723 states and 6901 transitions. [2022-02-24 01:19:42,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:42,097 INFO L276 IsEmpty]: Start isEmpty. Operand 5723 states and 6901 transitions. [2022-02-24 01:19:42,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:19:42,100 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:19:42,100 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:19:42,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-02-24 01:19:42,100 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:19:42,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:19:42,101 INFO L85 PathProgramCache]: Analyzing trace with hash 1509213830, now seen corresponding path program 33 times [2022-02-24 01:19:42,101 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:19:42,101 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1968371234] [2022-02-24 01:19:42,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:19:42,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:19:42,103 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:19:42,103 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:19:42,103 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:19:42,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:43,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:19:43,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:19:43,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:19:43,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:19:43,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1968371234] [2022-02-24 01:19:43,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1968371234] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:19:43,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:19:43,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-24 01:19:43,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428855742] [2022-02-24 01:19:43,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:19:43,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-24 01:19:43,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:19:43,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-24 01:19:43,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=548, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:19:43,549 INFO L87 Difference]: Start difference. First operand 5723 states and 6901 transitions. Second operand has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:19:56,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:19:56,211 INFO L93 Difference]: Finished difference Result 8168 states and 9925 transitions. [2022-02-24 01:19:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:19:56,212 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:19:56,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:19:56,219 INFO L225 Difference]: With dead ends: 8168 [2022-02-24 01:19:56,219 INFO L226 Difference]: Without dead ends: 6884 [2022-02-24 01:19:56,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=470, Invalid=2286, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:19:56,221 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 282 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1473 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 282 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 1473 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-24 01:19:56,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [282 Valid, 110 Invalid, 1550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 1473 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-24 01:19:56,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6884 states. [2022-02-24 01:20:04,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6884 to 5424. [2022-02-24 01:20:04,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.2022513378852187) internal successors, (6515), 5419 states have internal predecessors, (6515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:04,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6519 transitions. [2022-02-24 01:20:04,372 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6519 transitions. Word has length 102 [2022-02-24 01:20:04,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:04,373 INFO L470 AbstractCegarLoop]: Abstraction has 5424 states and 6519 transitions. [2022-02-24 01:20:04,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.6538461538461537) internal successors, (69), 25 states have internal predecessors, (69), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:04,373 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6519 transitions. [2022-02-24 01:20:04,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:20:04,376 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:04,376 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:04,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-02-24 01:20:04,376 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:04,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:04,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1587065724, now seen corresponding path program 34 times [2022-02-24 01:20:04,377 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:04,377 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1854953150] [2022-02-24 01:20:04,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:04,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:04,380 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:04,380 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:04,380 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:04,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:04,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:04,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:04,962 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:04,962 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1854953150] [2022-02-24 01:20:04,962 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1854953150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:04,962 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:04,962 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:20:04,962 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276802312] [2022-02-24 01:20:04,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:04,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:20:04,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:04,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:20:04,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=235, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:20:04,963 INFO L87 Difference]: Start difference. First operand 5424 states and 6519 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:14,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:14,708 INFO L93 Difference]: Finished difference Result 6566 states and 7963 transitions. [2022-02-24 01:20:14,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:20:14,708 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:20:14,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:14,715 INFO L225 Difference]: With dead ends: 6566 [2022-02-24 01:20:14,715 INFO L226 Difference]: Without dead ends: 5783 [2022-02-24 01:20:14,716 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=125, Invalid=805, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:20:14,717 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 126 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 1150 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 1150 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:14,717 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 105 Invalid, 1193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 1150 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:20:14,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2022-02-24 01:20:22,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 5514. [2022-02-24 01:20:22,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5509 states have (on average 1.2043928117625704) internal successors, (6635), 5509 states have internal predecessors, (6635), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:22,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 6639 transitions. [2022-02-24 01:20:22,995 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 6639 transitions. Word has length 102 [2022-02-24 01:20:22,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:22,995 INFO L470 AbstractCegarLoop]: Abstraction has 5514 states and 6639 transitions. [2022-02-24 01:20:22,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:22,996 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 6639 transitions. [2022-02-24 01:20:22,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:20:22,999 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:22,999 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:22,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-02-24 01:20:22,999 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:22,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:22,999 INFO L85 PathProgramCache]: Analyzing trace with hash -1980092734, now seen corresponding path program 35 times [2022-02-24 01:20:23,000 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:23,000 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [192929973] [2022-02-24 01:20:23,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:23,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:23,002 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:23,002 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:23,002 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:23,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:23,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:23,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:23,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:23,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [192929973] [2022-02-24 01:20:23,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [192929973] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:23,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:23,548 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:20:23,548 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859426927] [2022-02-24 01:20:23,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:23,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:20:23,548 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:23,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:20:23,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:20:23,549 INFO L87 Difference]: Start difference. First operand 5514 states and 6639 transitions. Second operand has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:32,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:32,974 INFO L93 Difference]: Finished difference Result 6542 states and 7943 transitions. [2022-02-24 01:20:32,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:20:32,975 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 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 102 [2022-02-24 01:20:32,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:32,980 INFO L225 Difference]: With dead ends: 6542 [2022-02-24 01:20:32,980 INFO L226 Difference]: Without dead ends: 5675 [2022-02-24 01:20:32,981 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=117, Invalid=695, Unknown=0, NotChecked=0, Total=812 [2022-02-24 01:20:32,982 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 129 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 993 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 1036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 993 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:32,982 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 83 Invalid, 1036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 993 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:20:32,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5675 states. [2022-02-24 01:20:41,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5675 to 5424. [2022-02-24 01:20:41,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.2022513378852187) internal successors, (6515), 5419 states have internal predecessors, (6515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:41,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6519 transitions. [2022-02-24 01:20:41,137 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6519 transitions. Word has length 102 [2022-02-24 01:20:41,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:41,138 INFO L470 AbstractCegarLoop]: Abstraction has 5424 states and 6519 transitions. [2022-02-24 01:20:41,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.625) internal successors, (58), 15 states have internal predecessors, (58), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:41,138 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6519 transitions. [2022-02-24 01:20:41,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:20:41,141 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:41,141 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:41,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-02-24 01:20:41,141 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:41,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:41,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1018957830, now seen corresponding path program 36 times [2022-02-24 01:20:41,142 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:41,142 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [285637015] [2022-02-24 01:20:41,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:41,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:41,144 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:41,145 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:41,145 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:41,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:41,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:41,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:41,607 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:41,607 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [285637015] [2022-02-24 01:20:41,607 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [285637015] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:41,607 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:41,607 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-24 01:20:41,607 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272053260] [2022-02-24 01:20:41,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:41,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-24 01:20:41,608 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:41,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-24 01:20:41,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=232, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:20:41,608 INFO L87 Difference]: Start difference. First operand 5424 states and 6519 transitions. Second operand has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:50,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:20:50,764 INFO L93 Difference]: Finished difference Result 6305 states and 7646 transitions. [2022-02-24 01:20:50,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-24 01:20:50,764 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:20:50,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:20:50,769 INFO L225 Difference]: With dead ends: 6305 [2022-02-24 01:20:50,769 INFO L226 Difference]: Without dead ends: 5522 [2022-02-24 01:20:50,770 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2022-02-24 01:20:50,770 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 148 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 1198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 1244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 1198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:20:50,770 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 87 Invalid, 1244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 1198 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:20:50,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5522 states. [2022-02-24 01:20:58,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5522 to 5424. [2022-02-24 01:20:58,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5424 states, 5419 states have (on average 1.2022513378852187) internal successors, (6515), 5419 states have internal predecessors, (6515), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:58,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5424 states to 5424 states and 6519 transitions. [2022-02-24 01:20:58,951 INFO L78 Accepts]: Start accepts. Automaton has 5424 states and 6519 transitions. Word has length 102 [2022-02-24 01:20:58,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:20:58,951 INFO L470 AbstractCegarLoop]: Abstraction has 5424 states and 6519 transitions. [2022-02-24 01:20:58,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.4705882352941178) internal successors, (59), 16 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:20:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 5424 states and 6519 transitions. [2022-02-24 01:20:58,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:20:58,954 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:20:58,955 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:20:58,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-02-24 01:20:58,955 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:20:58,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:20:58,955 INFO L85 PathProgramCache]: Analyzing trace with hash 39124806, now seen corresponding path program 37 times [2022-02-24 01:20:58,955 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:20:58,955 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1990712706] [2022-02-24 01:20:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:20:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:20:58,958 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:20:58,958 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:20:58,958 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:20:59,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:59,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:20:59,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:20:59,540 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:20:59,540 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:20:59,541 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1990712706] [2022-02-24 01:20:59,541 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1990712706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:20:59,541 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:20:59,541 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:20:59,541 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124555022] [2022-02-24 01:20:59,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:20:59,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:20:59,541 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:20:59,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:20:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:20:59,541 INFO L87 Difference]: Start difference. First operand 5424 states and 6519 transitions. Second operand has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:09,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:09,101 INFO L93 Difference]: Finished difference Result 8690 states and 10502 transitions. [2022-02-24 01:21:09,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-24 01:21:09,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:21:09,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:09,107 INFO L225 Difference]: With dead ends: 8690 [2022-02-24 01:21:09,107 INFO L226 Difference]: Without dead ends: 5812 [2022-02-24 01:21:09,110 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2022-02-24 01:21:09,110 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 119 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 546 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 582 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:09,111 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 74 Invalid, 582 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 546 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:21:09,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2022-02-24 01:21:17,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 5514. [2022-02-24 01:21:17,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5514 states, 5509 states have (on average 1.1987656561989473) internal successors, (6604), 5509 states have internal predecessors, (6604), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:17,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5514 states to 5514 states and 6608 transitions. [2022-02-24 01:21:17,557 INFO L78 Accepts]: Start accepts. Automaton has 5514 states and 6608 transitions. Word has length 102 [2022-02-24 01:21:17,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:17,557 INFO L470 AbstractCegarLoop]: Abstraction has 5514 states and 6608 transitions. [2022-02-24 01:21:17,557 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.4) internal successors, (51), 14 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:17,557 INFO L276 IsEmpty]: Start isEmpty. Operand 5514 states and 6608 transitions. [2022-02-24 01:21:17,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:21:17,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:17,561 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 5, 5, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:17,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-02-24 01:21:17,561 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:17,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -296792246, now seen corresponding path program 38 times [2022-02-24 01:21:17,561 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:17,561 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [533905000] [2022-02-24 01:21:17,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:17,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:17,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:17,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:17,564 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:17,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:19,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:19,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:19,262 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:19,262 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [533905000] [2022-02-24 01:21:19,262 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [533905000] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:19,262 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:19,262 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-24 01:21:19,262 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888079714] [2022-02-24 01:21:19,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:19,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-24 01:21:19,262 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:19,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-24 01:21:19,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=667, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:21:19,263 INFO L87 Difference]: Start difference. First operand 5514 states and 6608 transitions. Second operand has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:37,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:21:37,788 INFO L93 Difference]: Finished difference Result 11114 states and 13649 transitions. [2022-02-24 01:21:37,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-24 01:21:37,789 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:21:37,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:21:37,799 INFO L225 Difference]: With dead ends: 11114 [2022-02-24 01:21:37,799 INFO L226 Difference]: Without dead ends: 10105 [2022-02-24 01:21:37,801 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=386, Invalid=2370, Unknown=0, NotChecked=0, Total=2756 [2022-02-24 01:21:37,801 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 450 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 1788 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 450 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1933 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 1788 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-24 01:21:37,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [450 Valid, 116 Invalid, 1933 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 1788 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-24 01:21:37,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10105 states. [2022-02-24 01:21:48,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10105 to 6914. [2022-02-24 01:21:48,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6914 states, 6909 states have (on average 1.2066869300911853) internal successors, (8337), 6909 states have internal predecessors, (8337), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:48,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6914 states to 6914 states and 8341 transitions. [2022-02-24 01:21:48,456 INFO L78 Accepts]: Start accepts. Automaton has 6914 states and 8341 transitions. Word has length 102 [2022-02-24 01:21:48,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:21:48,457 INFO L470 AbstractCegarLoop]: Abstraction has 6914 states and 8341 transitions. [2022-02-24 01:21:48,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 27 states have internal predecessors, (78), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:21:48,457 INFO L276 IsEmpty]: Start isEmpty. Operand 6914 states and 8341 transitions. [2022-02-24 01:21:48,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:21:48,461 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:21:48,461 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 7, 4, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:21:48,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-02-24 01:21:48,461 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:21:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:21:48,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1904666614, now seen corresponding path program 39 times [2022-02-24 01:21:48,461 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:21:48,461 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1831577816] [2022-02-24 01:21:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:21:48,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:21:48,464 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:21:48,464 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:21:48,464 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:21:48,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:49,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:21:49,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:21:49,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:21:49,132 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:21:49,132 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1831577816] [2022-02-24 01:21:49,132 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1831577816] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:21:49,132 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:21:49,132 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:21:49,132 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225362428] [2022-02-24 01:21:49,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:21:49,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:21:49,132 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:21:49,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:21:49,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=208, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:21:49,133 INFO L87 Difference]: Start difference. First operand 6914 states and 8341 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:01,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:01,226 INFO L93 Difference]: Finished difference Result 11368 states and 13796 transitions. [2022-02-24 01:22:01,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:22:01,226 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 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 102 [2022-02-24 01:22:01,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:01,234 INFO L225 Difference]: With dead ends: 11368 [2022-02-24 01:22:01,234 INFO L226 Difference]: Without dead ends: 7329 [2022-02-24 01:22:01,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:22:01,238 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 110 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:01,238 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 87 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:22:01,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7329 states. [2022-02-24 01:22:11,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7329 to 6572. [2022-02-24 01:22:11,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6572 states, 6567 states have (on average 1.2165372316126084) internal successors, (7989), 6567 states have internal predecessors, (7989), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:11,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6572 states to 6572 states and 7993 transitions. [2022-02-24 01:22:11,163 INFO L78 Accepts]: Start accepts. Automaton has 6572 states and 7993 transitions. Word has length 102 [2022-02-24 01:22:11,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:11,163 INFO L470 AbstractCegarLoop]: Abstraction has 6572 states and 7993 transitions. [2022-02-24 01:22:11,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 15 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:11,163 INFO L276 IsEmpty]: Start isEmpty. Operand 6572 states and 7993 transitions. [2022-02-24 01:22:11,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:22:11,167 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:11,167 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:11,167 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-02-24 01:22:11,167 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:11,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:11,167 INFO L85 PathProgramCache]: Analyzing trace with hash 610412102, now seen corresponding path program 40 times [2022-02-24 01:22:11,167 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:11,167 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758381391] [2022-02-24 01:22:11,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:11,168 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:11,170 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:11,170 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:11,170 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:11,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:12,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:12,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:12,929 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:12,929 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758381391] [2022-02-24 01:22:12,929 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758381391] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:12,929 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:12,929 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-24 01:22:12,929 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782996156] [2022-02-24 01:22:12,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:12,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-24 01:22:12,929 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-24 01:22:12,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=526, Unknown=0, NotChecked=0, Total=600 [2022-02-24 01:22:12,930 INFO L87 Difference]: Start difference. First operand 6572 states and 7993 transitions. Second operand has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:27,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:22:27,618 INFO L93 Difference]: Finished difference Result 8559 states and 10468 transitions. [2022-02-24 01:22:27,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-24 01:22:27,618 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:22:27,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:22:27,626 INFO L225 Difference]: With dead ends: 8559 [2022-02-24 01:22:27,626 INFO L226 Difference]: Without dead ends: 8309 [2022-02-24 01:22:27,628 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 373 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=378, Invalid=1784, Unknown=0, NotChecked=0, Total=2162 [2022-02-24 01:22:27,628 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 308 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 890 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 308 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 973 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 890 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:22:27,628 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [308 Valid, 71 Invalid, 973 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 890 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:22:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8309 states. [2022-02-24 01:22:38,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8309 to 6858. [2022-02-24 01:22:38,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6858 states, 6853 states have (on average 1.2128994600904712) internal successors, (8312), 6853 states have internal predecessors, (8312), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:38,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6858 states to 6858 states and 8316 transitions. [2022-02-24 01:22:38,105 INFO L78 Accepts]: Start accepts. Automaton has 6858 states and 8316 transitions. Word has length 102 [2022-02-24 01:22:38,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:22:38,105 INFO L470 AbstractCegarLoop]: Abstraction has 6858 states and 8316 transitions. [2022-02-24 01:22:38,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.6) internal successors, (65), 24 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:22:38,105 INFO L276 IsEmpty]: Start isEmpty. Operand 6858 states and 8316 transitions. [2022-02-24 01:22:38,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:22:38,109 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:22:38,109 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:22:38,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-02-24 01:22:38,109 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:22:38,110 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:22:38,110 INFO L85 PathProgramCache]: Analyzing trace with hash 416633098, now seen corresponding path program 41 times [2022-02-24 01:22:38,110 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:22:38,110 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1294257578] [2022-02-24 01:22:38,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:22:38,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:22:38,112 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:22:38,112 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:22:38,112 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:22:38,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:39,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:22:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:22:39,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:22:39,611 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:22:39,611 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1294257578] [2022-02-24 01:22:39,611 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1294257578] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:22:39,611 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:22:39,611 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-24 01:22:39,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937245866] [2022-02-24 01:22:39,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:22:39,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-24 01:22:39,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:22:39,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-24 01:22:39,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2022-02-24 01:22:39,614 INFO L87 Difference]: Start difference. First operand 6858 states and 8316 transitions. Second operand has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:00,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:00,212 INFO L93 Difference]: Finished difference Result 12771 states and 15726 transitions. [2022-02-24 01:23:00,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-24 01:23:00,213 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:23:00,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:00,225 INFO L225 Difference]: With dead ends: 12771 [2022-02-24 01:23:00,225 INFO L226 Difference]: Without dead ends: 11774 [2022-02-24 01:23:00,227 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=294, Invalid=1428, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 01:23:00,227 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 345 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 345 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 1218 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:00,227 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [345 Valid, 107 Invalid, 1218 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:23:00,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11774 states. [2022-02-24 01:23:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11774 to 8207. [2022-02-24 01:23:12,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8207 states, 8202 states have (on average 1.2217751767861498) internal successors, (10021), 8202 states have internal predecessors, (10021), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:12,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8207 states to 8207 states and 10025 transitions. [2022-02-24 01:23:12,908 INFO L78 Accepts]: Start accepts. Automaton has 8207 states and 10025 transitions. Word has length 102 [2022-02-24 01:23:12,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:12,909 INFO L470 AbstractCegarLoop]: Abstraction has 8207 states and 10025 transitions. [2022-02-24 01:23:12,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.8260869565217392) internal successors, (65), 22 states have internal predecessors, (65), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:12,909 INFO L276 IsEmpty]: Start isEmpty. Operand 8207 states and 10025 transitions. [2022-02-24 01:23:12,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:23:12,913 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:12,913 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:12,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-02-24 01:23:12,913 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:12,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:12,913 INFO L85 PathProgramCache]: Analyzing trace with hash 725205962, now seen corresponding path program 42 times [2022-02-24 01:23:12,913 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:12,913 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [687798055] [2022-02-24 01:23:12,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:12,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:12,916 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:12,916 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:12,916 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:12,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:13,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:13,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:13,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:13,372 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:13,372 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [687798055] [2022-02-24 01:23:13,372 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [687798055] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:13,372 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:13,372 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:23:13,372 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995608025] [2022-02-24 01:23:13,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:13,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:23:13,373 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:13,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:23:13,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:23:13,373 INFO L87 Difference]: Start difference. First operand 8207 states and 10025 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:26,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:26,829 INFO L93 Difference]: Finished difference Result 13349 states and 16405 transitions. [2022-02-24 01:23:26,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:23:26,829 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 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 102 [2022-02-24 01:23:26,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:26,838 INFO L225 Difference]: With dead ends: 13349 [2022-02-24 01:23:26,838 INFO L226 Difference]: Without dead ends: 8535 [2022-02-24 01:23:26,843 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:23:26,844 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 67 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 210 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:26,844 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 53 Invalid, 210 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:23:26,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8535 states. [2022-02-24 01:23:39,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8535 to 8426. [2022-02-24 01:23:39,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8426 states, 8421 states have (on average 1.215770098563116) internal successors, (10238), 8421 states have internal predecessors, (10238), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:39,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8426 states to 8426 states and 10242 transitions. [2022-02-24 01:23:39,958 INFO L78 Accepts]: Start accepts. Automaton has 8426 states and 10242 transitions. Word has length 102 [2022-02-24 01:23:39,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:23:39,958 INFO L470 AbstractCegarLoop]: Abstraction has 8426 states and 10242 transitions. [2022-02-24 01:23:39,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 9 states have internal predecessors, (37), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:39,958 INFO L276 IsEmpty]: Start isEmpty. Operand 8426 states and 10242 transitions. [2022-02-24 01:23:39,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:23:39,963 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:23:39,963 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:23:39,964 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-02-24 01:23:39,964 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:23:39,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:23:39,964 INFO L85 PathProgramCache]: Analyzing trace with hash 44957194, now seen corresponding path program 43 times [2022-02-24 01:23:39,964 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:23:39,964 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [106290541] [2022-02-24 01:23:39,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:23:39,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:23:39,967 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:23:39,967 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:23:39,967 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:23:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:41,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:23:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:23:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:23:41,354 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:23:41,355 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [106290541] [2022-02-24 01:23:41,355 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [106290541] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:23:41,355 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:23:41,355 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-24 01:23:41,355 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638819363] [2022-02-24 01:23:41,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:23:41,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-24 01:23:41,355 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:23:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-24 01:23:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:23:41,355 INFO L87 Difference]: Start difference. First operand 8426 states and 10242 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:23:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:23:57,640 INFO L93 Difference]: Finished difference Result 9589 states and 11711 transitions. [2022-02-24 01:23:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-24 01:23:57,640 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:23:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:23:57,651 INFO L225 Difference]: With dead ends: 9589 [2022-02-24 01:23:57,652 INFO L226 Difference]: Without dead ends: 9307 [2022-02-24 01:23:57,653 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=331, Invalid=1309, Unknown=0, NotChecked=0, Total=1640 [2022-02-24 01:23:57,654 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 276 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 276 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 914 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-24 01:23:57,654 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [276 Valid, 91 Invalid, 914 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-24 01:23:57,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9307 states. [2022-02-24 01:24:10,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9307 to 8426. [2022-02-24 01:24:10,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8426 states, 8421 states have (on average 1.2151763448521553) internal successors, (10233), 8421 states have internal predecessors, (10233), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:10,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8426 states to 8426 states and 10237 transitions. [2022-02-24 01:24:10,981 INFO L78 Accepts]: Start accepts. Automaton has 8426 states and 10237 transitions. Word has length 102 [2022-02-24 01:24:10,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:10,981 INFO L470 AbstractCegarLoop]: Abstraction has 8426 states and 10237 transitions. [2022-02-24 01:24:10,981 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 19 states have internal predecessors, (50), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:10,981 INFO L276 IsEmpty]: Start isEmpty. Operand 8426 states and 10237 transitions. [2022-02-24 01:24:10,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:24:10,987 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:10,987 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:10,987 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-02-24 01:24:10,987 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:10,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:10,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1497426230, now seen corresponding path program 44 times [2022-02-24 01:24:10,987 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:10,987 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1237260265] [2022-02-24 01:24:10,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:10,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:10,990 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:10,990 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:10,990 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:11,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:11,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:11,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:11,492 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:11,492 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:11,492 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1237260265] [2022-02-24 01:24:11,492 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1237260265] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:11,492 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:11,492 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:24:11,492 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [948545894] [2022-02-24 01:24:11,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:11,493 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:24:11,493 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:11,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:24:11,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:24:11,493 INFO L87 Difference]: Start difference. First operand 8426 states and 10237 transitions. Second operand has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:26,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:24:26,032 INFO L93 Difference]: Finished difference Result 11584 states and 14118 transitions. [2022-02-24 01:24:26,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:24:26,032 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:24:26,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:24:26,042 INFO L225 Difference]: With dead ends: 11584 [2022-02-24 01:24:26,042 INFO L226 Difference]: Without dead ends: 9005 [2022-02-24 01:24:26,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=83, Invalid=297, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:24:26,045 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 70 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 301 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 70 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:24:26,045 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [70 Valid, 64 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 301 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:24:26,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9005 states. [2022-02-24 01:24:39,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9005 to 8744. [2022-02-24 01:24:39,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8744 states, 8739 states have (on average 1.212610138459778) internal successors, (10597), 8739 states have internal predecessors, (10597), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8744 states to 8744 states and 10601 transitions. [2022-02-24 01:24:39,831 INFO L78 Accepts]: Start accepts. Automaton has 8744 states and 10601 transitions. Word has length 102 [2022-02-24 01:24:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:24:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 8744 states and 10601 transitions. [2022-02-24 01:24:39,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5) internal successors, (42), 11 states have internal predecessors, (42), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:24:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 8744 states and 10601 transitions. [2022-02-24 01:24:39,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:24:39,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:24:39,836 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:24:39,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-02-24 01:24:39,837 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:24:39,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:24:39,837 INFO L85 PathProgramCache]: Analyzing trace with hash -1558120830, now seen corresponding path program 45 times [2022-02-24 01:24:39,837 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:24:39,837 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1024335412] [2022-02-24 01:24:39,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:24:39,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:24:39,840 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:24:39,840 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:24:39,840 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:24:39,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:41,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:24:41,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:24:41,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:24:41,047 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:24:41,047 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1024335412] [2022-02-24 01:24:41,047 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1024335412] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:24:41,047 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:24:41,047 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:24:41,047 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15273552] [2022-02-24 01:24:41,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:24:41,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:24:41,047 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:24:41,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:24:41,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:24:41,048 INFO L87 Difference]: Start difference. First operand 8744 states and 10601 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:01,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:01,412 INFO L93 Difference]: Finished difference Result 12370 states and 15121 transitions. [2022-02-24 01:25:01,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:25:01,412 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 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 102 [2022-02-24 01:25:01,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:01,424 INFO L225 Difference]: With dead ends: 12370 [2022-02-24 01:25:01,424 INFO L226 Difference]: Without dead ends: 11797 [2022-02-24 01:25:01,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=224, Invalid=898, Unknown=0, NotChecked=0, Total=1122 [2022-02-24 01:25:01,426 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 370 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 673 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 78 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 673 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:01,426 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [370 Valid, 78 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 673 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:25:01,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11797 states. [2022-02-24 01:25:16,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11797 to 9275. [2022-02-24 01:25:16,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9275 states, 9270 states have (on average 1.211111111111111) internal successors, (11227), 9270 states have internal predecessors, (11227), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:16,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9275 states to 9275 states and 11231 transitions. [2022-02-24 01:25:16,112 INFO L78 Accepts]: Start accepts. Automaton has 9275 states and 11231 transitions. Word has length 102 [2022-02-24 01:25:16,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:16,112 INFO L470 AbstractCegarLoop]: Abstraction has 9275 states and 11231 transitions. [2022-02-24 01:25:16,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:16,112 INFO L276 IsEmpty]: Start isEmpty. Operand 9275 states and 11231 transitions. [2022-02-24 01:25:16,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:25:16,118 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:16,118 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:16,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-02-24 01:25:16,118 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:16,118 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:16,118 INFO L85 PathProgramCache]: Analyzing trace with hash 1194463042, now seen corresponding path program 46 times [2022-02-24 01:25:16,118 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:16,118 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [535546993] [2022-02-24 01:25:16,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:16,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:16,121 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:16,121 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:16,121 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:16,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:16,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:16,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:16,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:16,642 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:16,642 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [535546993] [2022-02-24 01:25:16,642 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [535546993] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:16,642 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:16,642 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:25:16,642 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522370623] [2022-02-24 01:25:16,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:16,642 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:25:16,643 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:16,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:25:16,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=110, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:25:16,643 INFO L87 Difference]: Start difference. First operand 9275 states and 11231 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:32,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:25:32,665 INFO L93 Difference]: Finished difference Result 12832 states and 15562 transitions. [2022-02-24 01:25:32,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:25:32,665 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:25:32,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:25:32,677 INFO L225 Difference]: With dead ends: 12832 [2022-02-24 01:25:32,677 INFO L226 Difference]: Without dead ends: 9768 [2022-02-24 01:25:32,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:25:32,683 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 366 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 384 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:25:32,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 69 Invalid, 384 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 366 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:25:32,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9768 states. [2022-02-24 01:25:47,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9768 to 9458. [2022-02-24 01:25:47,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9458 states, 9453 states have (on average 1.2063895059769385) internal successors, (11404), 9453 states have internal predecessors, (11404), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:47,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9458 states to 9458 states and 11408 transitions. [2022-02-24 01:25:47,770 INFO L78 Accepts]: Start accepts. Automaton has 9458 states and 11408 transitions. Word has length 102 [2022-02-24 01:25:47,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:25:47,770 INFO L470 AbstractCegarLoop]: Abstraction has 9458 states and 11408 transitions. [2022-02-24 01:25:47,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 11 states have internal predecessors, (45), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:25:47,770 INFO L276 IsEmpty]: Start isEmpty. Operand 9458 states and 11408 transitions. [2022-02-24 01:25:47,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:25:47,776 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:25:47,776 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 6, 5, 4, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:25:47,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-02-24 01:25:47,777 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:25:47,777 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:25:47,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1787981558, now seen corresponding path program 47 times [2022-02-24 01:25:47,777 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:25:47,777 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1314274482] [2022-02-24 01:25:47,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:25:47,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:25:47,780 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:25:47,780 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:25:47,780 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:25:47,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:49,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:25:49,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:25:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:25:49,167 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:25:49,167 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1314274482] [2022-02-24 01:25:49,167 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1314274482] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:25:49,167 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:25:49,167 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-24 01:25:49,167 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253771608] [2022-02-24 01:25:49,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:25:49,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-24 01:25:49,168 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:25:49,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-24 01:25:49,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:25:49,168 INFO L87 Difference]: Start difference. First operand 9458 states and 11408 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:11,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:11,195 INFO L93 Difference]: Finished difference Result 13271 states and 16183 transitions. [2022-02-24 01:26:11,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-24 01:26:11,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 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 102 [2022-02-24 01:26:11,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:11,211 INFO L225 Difference]: With dead ends: 13271 [2022-02-24 01:26:11,211 INFO L226 Difference]: Without dead ends: 12176 [2022-02-24 01:26:11,217 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=251, Invalid=1081, Unknown=0, NotChecked=0, Total=1332 [2022-02-24 01:26:11,217 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 353 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 1048 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 353 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 1155 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 1048 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:11,217 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [353 Valid, 110 Invalid, 1155 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 1048 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-24 01:26:11,223 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12176 states. [2022-02-24 01:26:26,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12176 to 9455. [2022-02-24 01:26:26,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9455 states, 9450 states have (on average 1.2038095238095239) internal successors, (11376), 9450 states have internal predecessors, (11376), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:26,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9455 states to 9455 states and 11380 transitions. [2022-02-24 01:26:26,272 INFO L78 Accepts]: Start accepts. Automaton has 9455 states and 11380 transitions. Word has length 102 [2022-02-24 01:26:26,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:26:26,272 INFO L470 AbstractCegarLoop]: Abstraction has 9455 states and 11380 transitions. [2022-02-24 01:26:26,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:26,272 INFO L276 IsEmpty]: Start isEmpty. Operand 9455 states and 11380 transitions. [2022-02-24 01:26:26,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-02-24 01:26:26,278 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:26:26,278 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 8, 8, 8, 5, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:26:26,279 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-02-24 01:26:26,279 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:26:26,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:26:26,279 INFO L85 PathProgramCache]: Analyzing trace with hash 964602314, now seen corresponding path program 48 times [2022-02-24 01:26:26,279 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:26:26,279 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1520294235] [2022-02-24 01:26:26,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:26:26,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:26:26,282 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 2 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:26:26,282 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:26:26,282 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:26:26,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:27,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:26:27,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:26:27,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:26:27,104 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:26:27,104 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1520294235] [2022-02-24 01:26:27,104 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1520294235] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:26:27,104 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:26:27,104 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:26:27,104 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095342058] [2022-02-24 01:26:27,104 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:26:27,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:26:27,104 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:26:27,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:26:27,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=205, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:26:27,105 INFO L87 Difference]: Start difference. First operand 9455 states and 11380 transitions. Second operand has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:26:46,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:26:46,779 INFO L93 Difference]: Finished difference Result 16311 states and 19784 transitions. [2022-02-24 01:26:46,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-24 01:26:46,780 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.1875) internal successors, (51), 15 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 102 [2022-02-24 01:26:46,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:26:46,793 INFO L225 Difference]: With dead ends: 16311 [2022-02-24 01:26:46,793 INFO L226 Difference]: Without dead ends: 11332 [2022-02-24 01:26:46,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2022-02-24 01:26:46,801 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 136 mSDsluCounter, 51 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:26:46,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 79 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:26:46,806 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11332 states.