/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/eureka_01-1.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-05ce600 [2022-02-24 01:12:16,532 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-24 01:12:16,533 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-24 01:12:16,552 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-24 01:12:16,592 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-24 01:12:16,592 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-24 01:12:16,593 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-24 01:12:16,594 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 01:12:16,599 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-24 01:12:16,600 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-24 01:12:16,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-24 01:12:16,601 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-24 01:12:16,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-24 01:12:16,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:16,603 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-24 01:12:16,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-24 01:12:16,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-24 01:12:16,603 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-24 01:12:16,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-24 01:12:16,784 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-24 01:12:16,801 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-24 01:12:16,802 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-24 01:12:16,805 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-24 01:12:16,806 INFO L275 PluginConnector]: CDTParser initialized [2022-02-24 01:12:16,807 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loops/eureka_01-1.c [2022-02-24 01:12:16,864 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d00a68f/6f8e3ba1dee745a0b72f624aba15ccd1/FLAG204653e89 [2022-02-24 01:12:17,204 INFO L306 CDTParser]: Found 1 translation units. [2022-02-24 01:12:17,205 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loops/eureka_01-1.c [2022-02-24 01:12:17,227 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d00a68f/6f8e3ba1dee745a0b72f624aba15ccd1/FLAG204653e89 [2022-02-24 01:12:17,248 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a0d00a68f/6f8e3ba1dee745a0b72f624aba15ccd1 [2022-02-24 01:12:17,249 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-24 01:12:17,263 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-24 01:12:17,264 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:17,265 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-24 01:12:17,267 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-24 01:12:17,267 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,268 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55ca3110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17, skipping insertion in model container [2022-02-24 01:12:17,268 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,272 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-24 01:12:17,281 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-24 01:12:17,480 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/eureka_01-1.c[446,459] [2022-02-24 01:12:17,529 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:17,535 INFO L203 MainTranslator]: Completed pre-run [2022-02-24 01:12:17,549 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/eureka_01-1.c[446,459] [2022-02-24 01:12:17,570 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-24 01:12:17,581 INFO L208 MainTranslator]: Completed translation [2022-02-24 01:12:17,582 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17 WrapperNode [2022-02-24 01:12:17,582 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-24 01:12:17,583 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-24 01:12:17,583 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-24 01:12:17,583 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-24 01:12:17,591 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,592 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,607 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,608 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,627 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,633 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,634 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,636 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-24 01:12:17,637 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-24 01:12:17,637 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-24 01:12:17,637 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-24 01:12:17,638 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (1/1) ... [2022-02-24 01:12:17,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-24 01:12:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-24 01:12:17,661 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 01:12:17,666 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 01:12:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-24 01:12:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-24 01:12:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-02-24 01:12:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-24 01:12:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-02-24 01:12:17,685 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-24 01:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-24 01:12:17,685 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-24 01:12:17,686 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-24 01:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-24 01:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-24 01:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-24 01:12:17,687 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-24 01:12:17,768 INFO L234 CfgBuilder]: Building ICFG [2022-02-24 01:12:17,769 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-24 01:12:18,154 INFO L275 CfgBuilder]: Performing block encoding [2022-02-24 01:12:18,158 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-24 01:12:18,158 INFO L299 CfgBuilder]: Removed 5 assume(true) statements. [2022-02-24 01:12:18,160 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:18 BoogieIcfgContainer [2022-02-24 01:12:18,160 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-24 01:12:18,161 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-24 01:12:18,161 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-24 01:12:18,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-24 01:12:18,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 24.02 01:12:17" (1/3) ... [2022-02-24 01:12:18,191 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbd24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:18, skipping insertion in model container [2022-02-24 01:12:18,191 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 24.02 01:12:17" (2/3) ... [2022-02-24 01:12:18,192 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1afbd24f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 24.02 01:12:18, skipping insertion in model container [2022-02-24 01:12:18,192 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 24.02 01:12:18" (3/3) ... [2022-02-24 01:12:18,193 INFO L111 eAbstractionObserver]: Analyzing ICFG eureka_01-1.c [2022-02-24 01:12:18,196 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-24 01:12:18,197 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-24 01:12:18,269 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-24 01:12:18,273 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 01:12:18,274 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-24 01:12:18,303 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 01:12:18,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 01:12:18,319 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:18,320 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 01:12:18,321 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:18,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1703238628, now seen corresponding path program 1 times [2022-02-24 01:12:18,357 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:18,358 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [658224820] [2022-02-24 01:12:18,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:18,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:18,446 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:18,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,607 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 01:12:18,608 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:18,609 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [658224820] [2022-02-24 01:12:18,610 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [658224820] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:18,610 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:18,610 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-02-24 01:12:18,611 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874597641] [2022-02-24 01:12:18,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:18,616 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-02-24 01:12:18,616 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:18,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-02-24 01:12:18,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-02-24 01:12:18,638 INFO L87 Difference]: Start difference. First operand has 37 states, 29 states have (on average 1.5862068965517242) internal successors, (46), 30 states have internal predecessors, (46), 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 5.0) internal successors, (15), 2 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 01:12:18,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:18,688 INFO L93 Difference]: Finished difference Result 63 states and 89 transitions. [2022-02-24 01:12:18,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-02-24 01:12:18,690 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 01:12:18,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:18,697 INFO L225 Difference]: With dead ends: 63 [2022-02-24 01:12:18,697 INFO L226 Difference]: Without dead ends: 32 [2022-02-24 01:12:18,699 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 01:12:18,703 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 37 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 4 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:18,704 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 47 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:12:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-02-24 01:12:18,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2022-02-24 01:12:18,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:18,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-02-24 01:12:18,733 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 19 [2022-02-24 01:12:18,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:18,734 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-02-24 01:12:18,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 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 01:12:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-02-24 01:12:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-24 01:12:18,735 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:18,735 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 01:12:18,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-24 01:12:18,736 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:18,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:18,738 INFO L85 PathProgramCache]: Analyzing trace with hash -779965392, now seen corresponding path program 1 times [2022-02-24 01:12:18,738 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:18,738 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [479928706] [2022-02-24 01:12:18,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:18,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:18,744 INFO L213 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-24 01:12:18,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:18,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:18,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:18,923 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:18,923 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [479928706] [2022-02-24 01:12:18,923 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [479928706] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:18,923 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:18,924 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:18,924 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246121382] [2022-02-24 01:12:18,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:18,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:12:18,924 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:18,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:12:18,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:12:18,925 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 01:12:19,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:19,155 INFO L93 Difference]: Finished difference Result 80 states and 100 transitions. [2022-02-24 01:12:19,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-24 01:12:19,155 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 01:12:19,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:19,158 INFO L225 Difference]: With dead ends: 80 [2022-02-24 01:12:19,159 INFO L226 Difference]: Without dead ends: 48 [2022-02-24 01:12:19,163 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:19,164 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 89 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 122 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:19,164 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 36 Invalid, 122 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:19,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-24 01:12:19,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 34. [2022-02-24 01:12:19,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 28 states have (on average 1.25) internal successors, (35), 28 states have internal predecessors, (35), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:19,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 40 transitions. [2022-02-24 01:12:19,178 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 40 transitions. Word has length 19 [2022-02-24 01:12:19,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:19,179 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 40 transitions. [2022-02-24 01:12:19,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.5) internal successors, (15), 5 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 01:12:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 40 transitions. [2022-02-24 01:12:19,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:19,180 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:19,180 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, 1, 1, 1, 1] [2022-02-24 01:12:19,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-24 01:12:19,181 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:19,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:19,183 INFO L85 PathProgramCache]: Analyzing trace with hash 470194446, now seen corresponding path program 1 times [2022-02-24 01:12:19,187 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:19,187 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [512012783] [2022-02-24 01:12:19,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:19,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:19,204 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:19,204 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:19,204 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:19,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,420 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:19,421 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:19,421 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [512012783] [2022-02-24 01:12:19,421 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [512012783] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:19,421 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:19,422 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-24 01:12:19,422 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62259552] [2022-02-24 01:12:19,422 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:19,422 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-24 01:12:19,422 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:19,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-24 01:12:19,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2022-02-24 01:12:19,423 INFO L87 Difference]: Start difference. First operand 34 states and 40 transitions. Second operand has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 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 01:12:19,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:19,713 INFO L93 Difference]: Finished difference Result 78 states and 97 transitions. [2022-02-24 01:12:19,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:19,714 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 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 01:12:19,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:19,716 INFO L225 Difference]: With dead ends: 78 [2022-02-24 01:12:19,716 INFO L226 Difference]: Without dead ends: 76 [2022-02-24 01:12:19,717 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:19,723 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 97 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 239 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 239 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:19,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 50 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 239 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:19,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2022-02-24 01:12:19,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2022-02-24 01:12:19,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 47 states have (on average 1.2765957446808511) internal successors, (60), 48 states have internal predecessors, (60), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:19,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 67 transitions. [2022-02-24 01:12:19,742 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 67 transitions. Word has length 25 [2022-02-24 01:12:19,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:19,742 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 67 transitions. [2022-02-24 01:12:19,743 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 2.625) internal successors, (21), 7 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 01:12:19,743 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 67 transitions. [2022-02-24 01:12:19,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-24 01:12:19,744 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:19,745 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, 1, 1, 1, 1] [2022-02-24 01:12:19,745 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-24 01:12:19,745 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:19,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:19,745 INFO L85 PathProgramCache]: Analyzing trace with hash -550873908, now seen corresponding path program 1 times [2022-02-24 01:12:19,745 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:19,746 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649721266] [2022-02-24 01:12:19,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:19,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:19,749 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:19,749 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:19,749 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:19,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:19,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:19,795 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:19,795 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649721266] [2022-02-24 01:12:19,796 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [649721266] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:19,796 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:19,796 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-02-24 01:12:19,796 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735884448] [2022-02-24 01:12:19,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:19,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-02-24 01:12:19,797 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:19,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-02-24 01:12:19,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-02-24 01:12:19,798 INFO L87 Difference]: Start difference. First operand 55 states and 67 transitions. Second operand has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 01:12:19,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:19,853 INFO L93 Difference]: Finished difference Result 82 states and 101 transitions. [2022-02-24 01:12:19,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-02-24 01:12:19,853 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 01:12:19,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:19,856 INFO L225 Difference]: With dead ends: 82 [2022-02-24 01:12:19,856 INFO L226 Difference]: Without dead ends: 57 [2022-02-24 01:12:19,857 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 01:12:19,867 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 34 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:19,868 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 40 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:12:19,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2022-02-24 01:12:19,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2022-02-24 01:12:19,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 48 states have (on average 1.2708333333333333) internal successors, (61), 49 states have internal predecessors, (61), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:19,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-02-24 01:12:19,883 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 25 [2022-02-24 01:12:19,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:19,884 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-02-24 01:12:19,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.25) internal successors, (21), 3 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 01:12:19,884 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-02-24 01:12:19,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:12:19,885 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:19,885 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, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:19,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-24 01:12:19,885 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:19,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:19,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1439064257, now seen corresponding path program 1 times [2022-02-24 01:12:19,885 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:19,886 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [903057121] [2022-02-24 01:12:19,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:19,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:19,888 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:19,888 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:19,888 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:19,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:19,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:19,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:19,991 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:19,991 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [903057121] [2022-02-24 01:12:19,992 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [903057121] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:19,992 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:19,992 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-24 01:12:19,992 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784281289] [2022-02-24 01:12:19,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:19,992 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-24 01:12:19,992 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:19,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-24 01:12:19,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:19,993 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:20,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:20,186 INFO L93 Difference]: Finished difference Result 130 states and 165 transitions. [2022-02-24 01:12:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-02-24 01:12:20,199 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:12:20,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:20,200 INFO L225 Difference]: With dead ends: 130 [2022-02-24 01:12:20,200 INFO L226 Difference]: Without dead ends: 94 [2022-02-24 01:12:20,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:20,201 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 85 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:20,202 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 59 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:20,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2022-02-24 01:12:20,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2022-02-24 01:12:20,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 60 states have (on average 1.2833333333333334) internal successors, (77), 61 states have internal predecessors, (77), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:20,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 84 transitions. [2022-02-24 01:12:20,211 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 84 transitions. Word has length 28 [2022-02-24 01:12:20,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:20,211 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 84 transitions. [2022-02-24 01:12:20,212 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.4285714285714284) internal successors, (24), 6 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:20,212 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 84 transitions. [2022-02-24 01:12:20,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-02-24 01:12:20,212 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:20,212 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, 1, 1, 1, 1, 1] [2022-02-24 01:12:20,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-24 01:12:20,213 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:20,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:20,213 INFO L85 PathProgramCache]: Analyzing trace with hash 244787668, now seen corresponding path program 1 times [2022-02-24 01:12:20,213 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:20,213 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1248624581] [2022-02-24 01:12:20,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:20,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:20,216 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:20,216 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:20,216 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:20,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:20,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:20,320 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:20,320 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1248624581] [2022-02-24 01:12:20,320 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1248624581] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:20,320 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:20,321 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:20,321 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145554790] [2022-02-24 01:12:20,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:20,321 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:20,321 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:20,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:20,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:20,321 INFO L87 Difference]: Start difference. First operand 68 states and 84 transitions. Second operand has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:20,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:20,685 INFO L93 Difference]: Finished difference Result 178 states and 225 transitions. [2022-02-24 01:12:20,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:20,686 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 28 [2022-02-24 01:12:20,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:20,687 INFO L225 Difference]: With dead ends: 178 [2022-02-24 01:12:20,687 INFO L226 Difference]: Without dead ends: 148 [2022-02-24 01:12:20,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:20,699 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 112 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 279 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 73 SdHoareTripleChecker+Invalid, 332 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 279 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:20,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 73 Invalid, 332 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 279 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:20,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2022-02-24 01:12:20,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 87. [2022-02-24 01:12:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 79 states have (on average 1.3037974683544304) internal successors, (103), 80 states have internal predecessors, (103), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:20,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 110 transitions. [2022-02-24 01:12:20,717 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 110 transitions. Word has length 28 [2022-02-24 01:12:20,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:20,717 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 110 transitions. [2022-02-24 01:12:20,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.0) internal successors, (24), 7 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:20,718 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 110 transitions. [2022-02-24 01:12:20,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:12:20,718 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:20,718 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:20,719 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-24 01:12:20,719 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:20,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash 777875589, now seen corresponding path program 1 times [2022-02-24 01:12:20,734 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:20,734 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1322872786] [2022-02-24 01:12:20,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:20,735 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:20,736 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:20,737 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:20,737 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:20,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:21,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,232 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:21,232 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:21,232 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1322872786] [2022-02-24 01:12:21,232 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1322872786] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:21,232 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:21,233 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-24 01:12:21,233 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937928079] [2022-02-24 01:12:21,233 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:21,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-24 01:12:21,233 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:21,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-24 01:12:21,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:21,234 INFO L87 Difference]: Start difference. First operand 87 states and 110 transitions. Second operand has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 01:12:21,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:21,727 INFO L93 Difference]: Finished difference Result 177 states and 227 transitions. [2022-02-24 01:12:21,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-24 01:12:21,727 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 01:12:21,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:21,729 INFO L225 Difference]: With dead ends: 177 [2022-02-24 01:12:21,729 INFO L226 Difference]: Without dead ends: 175 [2022-02-24 01:12:21,729 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=532, Unknown=0, NotChecked=0, Total=702 [2022-02-24 01:12:21,730 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 220 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 369 mSolverCounterSat, 98 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 221 SdHoareTripleChecker+Valid, 51 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 98 IncrementalHoareTripleChecker+Valid, 369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:21,730 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [221 Valid, 51 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [98 Valid, 369 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:21,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2022-02-24 01:12:21,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 89. [2022-02-24 01:12:21,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 81 states have (on average 1.3209876543209877) internal successors, (107), 82 states have internal predecessors, (107), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:21,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 114 transitions. [2022-02-24 01:12:21,745 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 114 transitions. Word has length 31 [2022-02-24 01:12:21,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:21,746 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 114 transitions. [2022-02-24 01:12:21,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.076923076923077) internal successors, (27), 12 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 01:12:21,746 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 114 transitions. [2022-02-24 01:12:21,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-24 01:12:21,747 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:21,747 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 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 01:12:21,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-24 01:12:21,747 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:21,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:21,747 INFO L85 PathProgramCache]: Analyzing trace with hash 1819082994, now seen corresponding path program 2 times [2022-02-24 01:12:21,747 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:21,747 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [775730208] [2022-02-24 01:12:21,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:21,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:21,750 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:21,750 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:21,750 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:21,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:21,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:21,856 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:21,856 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:21,856 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [775730208] [2022-02-24 01:12:21,856 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [775730208] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:21,856 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:21,856 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:12:21,856 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287751159] [2022-02-24 01:12:21,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:21,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:21,857 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:21,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:21,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:21,857 INFO L87 Difference]: Start difference. First operand 89 states and 114 transitions. Second operand has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:22,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:22,178 INFO L93 Difference]: Finished difference Result 218 states and 287 transitions. [2022-02-24 01:12:22,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:22,178 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have 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 01:12:22,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:22,180 INFO L225 Difference]: With dead ends: 218 [2022-02-24 01:12:22,180 INFO L226 Difference]: Without dead ends: 216 [2022-02-24 01:12:22,180 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=331, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:22,181 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 157 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:22,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [158 Valid, 58 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:22,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-24 01:12:22,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 112. [2022-02-24 01:12:22,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 104 states have (on average 1.3557692307692308) internal successors, (141), 105 states have internal predecessors, (141), 4 states have call successors, (4), 4 states have call predecessors, (4), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:22,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 148 transitions. [2022-02-24 01:12:22,222 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 148 transitions. Word has length 31 [2022-02-24 01:12:22,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:22,222 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 148 transitions. [2022-02-24 01:12:22,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.4) internal successors, (24), 9 states have internal predecessors, (24), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-24 01:12:22,222 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 148 transitions. [2022-02-24 01:12:22,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2022-02-24 01:12:22,224 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:22,224 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1] [2022-02-24 01:12:22,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-24 01:12:22,225 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:22,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:22,225 INFO L85 PathProgramCache]: Analyzing trace with hash -12240024, now seen corresponding path program 1 times [2022-02-24 01:12:22,225 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:22,225 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1678399376] [2022-02-24 01:12:22,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:22,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:22,227 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:22,228 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:22,228 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:22,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 21 [2022-02-24 01:12:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,299 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,299 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1678399376] [2022-02-24 01:12:22,299 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1678399376] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,299 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,299 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:22,299 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713851001] [2022-02-24 01:12:22,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:22,300 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:22,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:22,300 INFO L87 Difference]: Start difference. First operand 112 states and 148 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:22,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:22,531 INFO L93 Difference]: Finished difference Result 254 states and 333 transitions. [2022-02-24 01:12:22,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:22,532 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 33 [2022-02-24 01:12:22,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:22,535 INFO L225 Difference]: With dead ends: 254 [2022-02-24 01:12:22,536 INFO L226 Difference]: Without dead ends: 185 [2022-02-24 01:12:22,536 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:22,538 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 143 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:22,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 53 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:22,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2022-02-24 01:12:22,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 131. [2022-02-24 01:12:22,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 122 states have (on average 1.3442622950819672) internal successors, (164), 124 states have internal predecessors, (164), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:22,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 172 transitions. [2022-02-24 01:12:22,559 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 172 transitions. Word has length 33 [2022-02-24 01:12:22,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:22,559 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 172 transitions. [2022-02-24 01:12:22,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:22,560 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 172 transitions. [2022-02-24 01:12:22,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:12:22,561 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:22,561 INFO L514 BasicCegarLoop]: trace histogram [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, 1, 1, 1] [2022-02-24 01:12:22,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-24 01:12:22,562 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:22,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:22,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1882894858, now seen corresponding path program 2 times [2022-02-24 01:12:22,562 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:22,562 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [817928735] [2022-02-24 01:12:22,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:22,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:22,564 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:22,564 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:22,564 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:22,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,629 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,629 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [817928735] [2022-02-24 01:12:22,630 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [817928735] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,630 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,630 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:22,630 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044224154] [2022-02-24 01:12:22,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:22,631 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:22,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:22,631 INFO L87 Difference]: Start difference. First operand 131 states and 172 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 01:12:22,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:22,859 INFO L93 Difference]: Finished difference Result 240 states and 310 transitions. [2022-02-24 01:12:22,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-24 01:12:22,859 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 34 [2022-02-24 01:12:22,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:22,862 INFO L225 Difference]: With dead ends: 240 [2022-02-24 01:12:22,862 INFO L226 Difference]: Without dead ends: 219 [2022-02-24 01:12:22,865 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:22,865 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 124 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 68 SdHoareTripleChecker+Invalid, 258 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:22,866 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 68 Invalid, 258 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:22,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2022-02-24 01:12:22,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 174. [2022-02-24 01:12:22,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 165 states have (on average 1.3393939393939394) internal successors, (221), 167 states have internal predecessors, (221), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:22,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 229 transitions. [2022-02-24 01:12:22,892 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 229 transitions. Word has length 34 [2022-02-24 01:12:22,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:22,892 INFO L470 AbstractCegarLoop]: Abstraction has 174 states and 229 transitions. [2022-02-24 01:12:22,892 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 01:12:22,892 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 229 transitions. [2022-02-24 01:12:22,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:12:22,893 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:22,893 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:22,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-24 01:12:22,893 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:22,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:22,894 INFO L85 PathProgramCache]: Analyzing trace with hash -1856507910, now seen corresponding path program 3 times [2022-02-24 01:12:22,894 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:22,894 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [124588351] [2022-02-24 01:12:22,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:22,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:22,897 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:22,898 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:22,898 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:22,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:22,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:22,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:22,961 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:22,961 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [124588351] [2022-02-24 01:12:22,961 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [124588351] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:22,961 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:22,961 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-24 01:12:22,961 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973303071] [2022-02-24 01:12:22,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:22,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-24 01:12:22,962 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:22,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-24 01:12:22,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-24 01:12:22,962 INFO L87 Difference]: Start difference. First operand 174 states and 229 transitions. Second operand has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 01:12:23,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,059 INFO L93 Difference]: Finished difference Result 248 states and 320 transitions. [2022-02-24 01:12:23,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:12:23,060 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 34 [2022-02-24 01:12:23,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,061 INFO L225 Difference]: With dead ends: 248 [2022-02-24 01:12:23,061 INFO L226 Difference]: Without dead ends: 143 [2022-02-24 01:12:23,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-02-24 01:12:23,061 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 59 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 88 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 60 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 97 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 88 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,062 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [60 Valid, 42 Invalid, 97 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 88 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:23,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-02-24 01:12:23,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 140. [2022-02-24 01:12:23,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 131 states have (on average 1.297709923664122) internal successors, (170), 133 states have internal predecessors, (170), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:23,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 178 transitions. [2022-02-24 01:12:23,082 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 178 transitions. Word has length 34 [2022-02-24 01:12:23,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,082 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 178 transitions. [2022-02-24 01:12:23,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.2) internal successors, (26), 4 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 01:12:23,082 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 178 transitions. [2022-02-24 01:12:23,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2022-02-24 01:12:23,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,083 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:23,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-24 01:12:23,083 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1637653192, now seen corresponding path program 4 times [2022-02-24 01:12:23,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,084 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506225699] [2022-02-24 01:12:23,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,088 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,088 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,088 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:23,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:23,191 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:23,191 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506225699] [2022-02-24 01:12:23,191 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506225699] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:23,191 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:23,191 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:23,191 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1985241823] [2022-02-24 01:12:23,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:23,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:23,192 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:23,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:23,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:23,192 INFO L87 Difference]: Start difference. First operand 140 states and 178 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 01:12:23,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:23,541 INFO L93 Difference]: Finished difference Result 346 states and 441 transitions. [2022-02-24 01:12:23,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-24 01:12:23,541 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 34 [2022-02-24 01:12:23,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:23,543 INFO L225 Difference]: With dead ends: 346 [2022-02-24 01:12:23,543 INFO L226 Difference]: Without dead ends: 308 [2022-02-24 01:12:23,543 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=87, Invalid=255, Unknown=0, NotChecked=0, Total=342 [2022-02-24 01:12:23,544 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 169 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 442 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 520 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:23,544 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 93 Invalid, 520 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 442 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:23,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2022-02-24 01:12:23,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 173. [2022-02-24 01:12:23,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 164 states have (on average 1.3048780487804879) internal successors, (214), 166 states have internal predecessors, (214), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:23,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 222 transitions. [2022-02-24 01:12:23,570 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 222 transitions. Word has length 34 [2022-02-24 01:12:23,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:23,570 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 222 transitions. [2022-02-24 01:12:23,570 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 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 01:12:23,570 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 222 transitions. [2022-02-24 01:12:23,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 01:12:23,571 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:23,571 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 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 01:12:23,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-24 01:12:23,571 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:23,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:23,571 INFO L85 PathProgramCache]: Analyzing trace with hash -1470221714, now seen corresponding path program 3 times [2022-02-24 01:12:23,572 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:23,572 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1528521494] [2022-02-24 01:12:23,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:23,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:23,573 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:23,573 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:23,573 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:23,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,119 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,119 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1528521494] [2022-02-24 01:12:24,119 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1528521494] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-24 01:12:24,120 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [554945630] [2022-02-24 01:12:24,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-24 01:12:24,120 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-24 01:12:24,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:24,121 INFO L87 Difference]: Start difference. First operand 173 states and 222 transitions. Second operand has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 01:12:24,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,545 INFO L93 Difference]: Finished difference Result 200 states and 252 transitions. [2022-02-24 01:12:24,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:24,545 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 01:12:24,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,546 INFO L225 Difference]: With dead ends: 200 [2022-02-24 01:12:24,546 INFO L226 Difference]: Without dead ends: 181 [2022-02-24 01:12:24,547 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=153, Invalid=603, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:12:24,547 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 86 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 71 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,547 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 71 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:24,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2022-02-24 01:12:24,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 176. [2022-02-24 01:12:24,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 167 states have (on average 1.3053892215568863) internal successors, (218), 169 states have internal predecessors, (218), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 226 transitions. [2022-02-24 01:12:24,574 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 226 transitions. Word has length 37 [2022-02-24 01:12:24,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,574 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 226 transitions. [2022-02-24 01:12:24,575 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.9411764705882353) internal successors, (33), 16 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 01:12:24,575 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 226 transitions. [2022-02-24 01:12:24,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 01:12:24,575 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,575 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 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, 1, 1] [2022-02-24 01:12:24,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-24 01:12:24,575 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,576 INFO L85 PathProgramCache]: Analyzing trace with hash -651731607, now seen corresponding path program 1 times [2022-02-24 01:12:24,576 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,576 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [5099031] [2022-02-24 01:12:24,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,578 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,578 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,578 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,612 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,612 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [5099031] [2022-02-24 01:12:24,612 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [5099031] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,612 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,612 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-24 01:12:24,612 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159214983] [2022-02-24 01:12:24,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-24 01:12:24,613 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-24 01:12:24,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-24 01:12:24,613 INFO L87 Difference]: Start difference. First operand 176 states and 226 transitions. Second operand has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 01:12:24,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:24,725 INFO L93 Difference]: Finished difference Result 280 states and 361 transitions. [2022-02-24 01:12:24,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-02-24 01:12:24,725 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 37 [2022-02-24 01:12:24,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:24,727 INFO L225 Difference]: With dead ends: 280 [2022-02-24 01:12:24,727 INFO L226 Difference]: Without dead ends: 200 [2022-02-24 01:12:24,727 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:24,727 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 83 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:24,728 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [84 Valid, 44 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-24 01:12:24,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2022-02-24 01:12:24,762 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 178. [2022-02-24 01:12:24,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 169 states have (on average 1.2840236686390532) internal successors, (217), 171 states have internal predecessors, (217), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:24,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 225 transitions. [2022-02-24 01:12:24,763 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 225 transitions. Word has length 37 [2022-02-24 01:12:24,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:24,764 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 225 transitions. [2022-02-24 01:12:24,764 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 5.166666666666667) internal successors, (31), 5 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 01:12:24,764 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 225 transitions. [2022-02-24 01:12:24,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-24 01:12:24,765 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:24,765 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:24,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-24 01:12:24,765 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:24,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:24,765 INFO L85 PathProgramCache]: Analyzing trace with hash 1411406606, now seen corresponding path program 5 times [2022-02-24 01:12:24,765 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:24,765 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [847732297] [2022-02-24 01:12:24,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:24,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:24,768 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:24,768 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:24,768 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:24,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:24,936 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:24,936 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [847732297] [2022-02-24 01:12:24,936 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [847732297] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:24,937 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:24,937 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-24 01:12:24,937 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1170312411] [2022-02-24 01:12:24,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:24,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-24 01:12:24,937 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:24,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-24 01:12:24,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2022-02-24 01:12:24,937 INFO L87 Difference]: Start difference. First operand 178 states and 225 transitions. Second operand has 11 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 01:12:25,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,233 INFO L93 Difference]: Finished difference Result 267 states and 340 transitions. [2022-02-24 01:12:25,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:25,233 INFO L78 Accepts]: Start accepts. Automaton has has 11 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 37 [2022-02-24 01:12:25,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,235 INFO L225 Difference]: With dead ends: 267 [2022-02-24 01:12:25,235 INFO L226 Difference]: Without dead ends: 265 [2022-02-24 01:12:25,235 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2022-02-24 01:12:25,236 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 105 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 350 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 62 Invalid, 395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [45 Valid, 350 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:25,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2022-02-24 01:12:25,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 162. [2022-02-24 01:12:25,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 153 states have (on average 1.2810457516339868) internal successors, (196), 155 states have internal predecessors, (196), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:25,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 204 transitions. [2022-02-24 01:12:25,271 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 204 transitions. Word has length 37 [2022-02-24 01:12:25,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,271 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 204 transitions. [2022-02-24 01:12:25,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 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 01:12:25,271 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 204 transitions. [2022-02-24 01:12:25,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-02-24 01:12:25,272 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,272 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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] [2022-02-24 01:12:25,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-24 01:12:25,272 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,273 INFO L85 PathProgramCache]: Analyzing trace with hash 524779340, now seen corresponding path program 1 times [2022-02-24 01:12:25,273 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,273 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912367285] [2022-02-24 01:12:25,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,275 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:25,275 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:25,275 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:25,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:25,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 01:12:25,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:25,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:25,394 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:25,394 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912367285] [2022-02-24 01:12:25,394 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [912367285] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:25,394 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:25,394 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-24 01:12:25,394 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623492941] [2022-02-24 01:12:25,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:25,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-24 01:12:25,394 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:25,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-24 01:12:25,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=128, Unknown=0, NotChecked=0, Total=156 [2022-02-24 01:12:25,395 INFO L87 Difference]: Start difference. First operand 162 states and 204 transitions. Second operand has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:25,843 INFO L93 Difference]: Finished difference Result 312 states and 399 transitions. [2022-02-24 01:12:25,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:12:25,844 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 39 [2022-02-24 01:12:25,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:25,845 INFO L225 Difference]: With dead ends: 312 [2022-02-24 01:12:25,845 INFO L226 Difference]: Without dead ends: 310 [2022-02-24 01:12:25,845 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2022-02-24 01:12:25,846 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 224 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 501 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 224 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:25,846 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [224 Valid, 67 Invalid, 571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 501 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:25,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 310 states. [2022-02-24 01:12:25,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 310 to 231. [2022-02-24 01:12:25,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 219 states have (on average 1.2831050228310503) internal successors, (281), 222 states have internal predecessors, (281), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:25,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 293 transitions. [2022-02-24 01:12:25,957 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 293 transitions. Word has length 39 [2022-02-24 01:12:25,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:25,957 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 293 transitions. [2022-02-24 01:12:25,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.5) internal successors, (30), 11 states have internal predecessors, (30), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:25,957 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 293 transitions. [2022-02-24 01:12:25,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:12:25,958 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:25,959 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 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, 1] [2022-02-24 01:12:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-24 01:12:25,959 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:25,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:25,959 INFO L85 PathProgramCache]: Analyzing trace with hash 994866975, now seen corresponding path program 4 times [2022-02-24 01:12:25,959 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:25,959 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [183804574] [2022-02-24 01:12:25,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:25,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:25,961 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:25,961 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:25,961 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:25,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:26,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:26,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:26,061 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:26,061 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [183804574] [2022-02-24 01:12:26,062 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [183804574] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:26,062 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:26,062 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:26,062 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820667705] [2022-02-24 01:12:26,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:26,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:26,062 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:26,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:26,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:26,063 INFO L87 Difference]: Start difference. First operand 231 states and 293 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 01:12:26,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:26,615 INFO L93 Difference]: Finished difference Result 498 states and 642 transitions. [2022-02-24 01:12:26,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:12:26,615 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 40 [2022-02-24 01:12:26,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:26,617 INFO L225 Difference]: With dead ends: 498 [2022-02-24 01:12:26,617 INFO L226 Difference]: Without dead ends: 466 [2022-02-24 01:12:26,617 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2022-02-24 01:12:26,618 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 134 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:26,618 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 95 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:26,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-02-24 01:12:26,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 315. [2022-02-24 01:12:26,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 303 states have (on average 1.3135313531353134) internal successors, (398), 306 states have internal predecessors, (398), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:26,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 410 transitions. [2022-02-24 01:12:26,696 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 410 transitions. Word has length 40 [2022-02-24 01:12:26,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:26,696 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 410 transitions. [2022-02-24 01:12:26,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 9 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 01:12:26,696 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 410 transitions. [2022-02-24 01:12:26,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2022-02-24 01:12:26,697 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:26,697 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 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 01:12:26,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-24 01:12:26,697 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:26,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:26,697 INFO L85 PathProgramCache]: Analyzing trace with hash -1497733084, now seen corresponding path program 2 times [2022-02-24 01:12:26,697 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:26,697 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1519262041] [2022-02-24 01:12:26,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:26,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:26,700 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:26,700 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:26,700 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:26,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:27,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:27,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:27,268 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:27,268 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1519262041] [2022-02-24 01:12:27,268 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1519262041] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:27,268 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:27,269 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-24 01:12:27,269 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332452264] [2022-02-24 01:12:27,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:27,269 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-24 01:12:27,269 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:27,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-24 01:12:27,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2022-02-24 01:12:27,270 INFO L87 Difference]: Start difference. First operand 315 states and 410 transitions. Second operand has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 01:12:28,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:28,126 INFO L93 Difference]: Finished difference Result 734 states and 962 transitions. [2022-02-24 01:12:28,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:12:28,127 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 40 [2022-02-24 01:12:28,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:28,130 INFO L225 Difference]: With dead ends: 734 [2022-02-24 01:12:28,130 INFO L226 Difference]: Without dead ends: 732 [2022-02-24 01:12:28,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=217, Invalid=775, Unknown=0, NotChecked=0, Total=992 [2022-02-24 01:12:28,131 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 207 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 587 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 702 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 587 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:28,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [208 Valid, 53 Invalid, 702 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 587 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:28,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 732 states. [2022-02-24 01:12:28,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 732 to 490. [2022-02-24 01:12:28,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 478 states have (on average 1.3577405857740585) internal successors, (649), 481 states have internal predecessors, (649), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:28,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 661 transitions. [2022-02-24 01:12:28,280 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 661 transitions. Word has length 40 [2022-02-24 01:12:28,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:28,281 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 661 transitions. [2022-02-24 01:12:28,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.3333333333333335) internal successors, (35), 14 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 01:12:28,281 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 661 transitions. [2022-02-24 01:12:28,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-24 01:12:28,282 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:28,282 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 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, 1, 1, 1] [2022-02-24 01:12:28,282 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-24 01:12:28,282 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:28,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:28,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1909650267, now seen corresponding path program 5 times [2022-02-24 01:12:28,283 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:28,283 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1586568692] [2022-02-24 01:12:28,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:28,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:28,285 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:28,285 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:28,285 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:28,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:28,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:28,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:28,981 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:28,981 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1586568692] [2022-02-24 01:12:28,981 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1586568692] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:28,981 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:28,981 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-24 01:12:28,981 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295729274] [2022-02-24 01:12:28,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:28,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-24 01:12:28,981 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:28,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-24 01:12:28,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2022-02-24 01:12:28,982 INFO L87 Difference]: Start difference. First operand 490 states and 661 transitions. Second operand has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 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 01:12:29,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:29,729 INFO L93 Difference]: Finished difference Result 520 states and 694 transitions. [2022-02-24 01:12:29,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-24 01:12:29,729 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 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 43 [2022-02-24 01:12:29,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:29,731 INFO L225 Difference]: With dead ends: 520 [2022-02-24 01:12:29,731 INFO L226 Difference]: Without dead ends: 498 [2022-02-24 01:12:29,732 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2022-02-24 01:12:29,732 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 122 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 123 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 669 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:29,732 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [123 Valid, 81 Invalid, 669 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-24 01:12:29,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2022-02-24 01:12:29,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 493. [2022-02-24 01:12:29,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 481 states have (on average 1.3575883575883576) internal successors, (653), 484 states have internal predecessors, (653), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:29,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 665 transitions. [2022-02-24 01:12:29,852 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 665 transitions. Word has length 43 [2022-02-24 01:12:29,852 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:29,852 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 665 transitions. [2022-02-24 01:12:29,852 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 1.8) internal successors, (36), 19 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 01:12:29,852 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 665 transitions. [2022-02-24 01:12:29,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2022-02-24 01:12:29,853 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:29,853 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 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 01:12:29,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-24 01:12:29,853 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:29,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:29,853 INFO L85 PathProgramCache]: Analyzing trace with hash -383539670, now seen corresponding path program 2 times [2022-02-24 01:12:29,853 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:29,853 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [542293444] [2022-02-24 01:12:29,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:29,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:29,858 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:29,858 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:29,858 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:29,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:29,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 33 [2022-02-24 01:12:29,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:29,942 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 01:12:29,942 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:29,942 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [542293444] [2022-02-24 01:12:29,942 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [542293444] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:29,942 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:29,942 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:29,942 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215777926] [2022-02-24 01:12:29,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:29,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:29,944 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:29,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:29,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:29,944 INFO L87 Difference]: Start difference. First operand 493 states and 665 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:30,355 INFO L93 Difference]: Finished difference Result 844 states and 1125 transitions. [2022-02-24 01:12:30,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-24 01:12:30,356 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 45 [2022-02-24 01:12:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:30,358 INFO L225 Difference]: With dead ends: 844 [2022-02-24 01:12:30,358 INFO L226 Difference]: Without dead ends: 535 [2022-02-24 01:12:30,359 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2022-02-24 01:12:30,359 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 179 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 218 mSolverCounterSat, 57 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 275 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 57 IncrementalHoareTripleChecker+Valid, 218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:30,360 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [179 Valid, 63 Invalid, 275 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [57 Valid, 218 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:30,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2022-02-24 01:12:30,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 407. [2022-02-24 01:12:30,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 407 states, 395 states have (on average 1.3341772151898734) internal successors, (527), 398 states have internal predecessors, (527), 7 states have call successors, (7), 5 states have call predecessors, (7), 4 states have return successors, (5), 3 states have call predecessors, (5), 5 states have call successors, (5) [2022-02-24 01:12:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 407 states to 407 states and 539 transitions. [2022-02-24 01:12:30,466 INFO L78 Accepts]: Start accepts. Automaton has 407 states and 539 transitions. Word has length 45 [2022-02-24 01:12:30,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:30,467 INFO L470 AbstractCegarLoop]: Abstraction has 407 states and 539 transitions. [2022-02-24 01:12:30,467 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), 3 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:30,467 INFO L276 IsEmpty]: Start isEmpty. Operand 407 states and 539 transitions. [2022-02-24 01:12:30,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-02-24 01:12:30,468 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:30,468 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:30,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-24 01:12:30,468 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:30,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:30,468 INFO L85 PathProgramCache]: Analyzing trace with hash 651363238, now seen corresponding path program 3 times [2022-02-24 01:12:30,468 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:30,468 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1402985150] [2022-02-24 01:12:30,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:30,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:30,474 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:30,474 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:30,474 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:30,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:30,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 27 [2022-02-24 01:12:30,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 35 [2022-02-24 01:12:30,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:30,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:30,572 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:30,572 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1402985150] [2022-02-24 01:12:30,572 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1402985150] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:30,572 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:30,572 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-24 01:12:30,572 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657273740] [2022-02-24 01:12:30,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:30,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-24 01:12:30,573 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:30,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-24 01:12:30,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2022-02-24 01:12:30,574 INFO L87 Difference]: Start difference. First operand 407 states and 539 transitions. Second operand has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:31,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:31,047 INFO L93 Difference]: Finished difference Result 775 states and 1004 transitions. [2022-02-24 01:12:31,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-24 01:12:31,047 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 47 [2022-02-24 01:12:31,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:31,050 INFO L225 Difference]: With dead ends: 775 [2022-02-24 01:12:31,050 INFO L226 Difference]: Without dead ends: 595 [2022-02-24 01:12:31,050 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2022-02-24 01:12:31,051 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 268 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 97 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 372 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 97 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:31,051 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [269 Valid, 62 Invalid, 372 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [97 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:31,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 595 states. [2022-02-24 01:12:31,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 595 to 440. [2022-02-24 01:12:31,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 426 states have (on average 1.307511737089202) internal successors, (557), 430 states have internal predecessors, (557), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:12:31,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 573 transitions. [2022-02-24 01:12:31,192 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 573 transitions. Word has length 47 [2022-02-24 01:12:31,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:31,192 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 573 transitions. [2022-02-24 01:12:31,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.3) internal successors, (33), 9 states have internal predecessors, (33), 4 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-02-24 01:12:31,192 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 573 transitions. [2022-02-24 01:12:31,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:12:31,193 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:31,193 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 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, 1, 1, 1] [2022-02-24 01:12:31,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-24 01:12:31,193 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:31,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:31,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1904691350, now seen corresponding path program 6 times [2022-02-24 01:12:31,194 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:31,194 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [182856708] [2022-02-24 01:12:31,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:31,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:31,197 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:31,197 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:31,197 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:31,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:31,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:31,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:31,270 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:31,270 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [182856708] [2022-02-24 01:12:31,270 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [182856708] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:31,270 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:31,270 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-24 01:12:31,270 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130075192] [2022-02-24 01:12:31,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:31,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-24 01:12:31,270 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:31,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-24 01:12:31,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2022-02-24 01:12:31,271 INFO L87 Difference]: Start difference. First operand 440 states and 573 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 01:12:31,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:31,948 INFO L93 Difference]: Finished difference Result 1037 states and 1338 transitions. [2022-02-24 01:12:31,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-24 01:12:31,948 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 46 [2022-02-24 01:12:31,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:31,951 INFO L225 Difference]: With dead ends: 1037 [2022-02-24 01:12:31,951 INFO L226 Difference]: Without dead ends: 997 [2022-02-24 01:12:31,952 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=199, Invalid=557, Unknown=0, NotChecked=0, Total=756 [2022-02-24 01:12:31,952 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 160 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 95 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:31,952 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 95 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-24 01:12:31,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2022-02-24 01:12:32,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 597. [2022-02-24 01:12:32,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 597 states, 583 states have (on average 1.3379073756432247) internal successors, (780), 587 states have internal predecessors, (780), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:12:32,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 597 states to 597 states and 796 transitions. [2022-02-24 01:12:32,148 INFO L78 Accepts]: Start accepts. Automaton has 597 states and 796 transitions. Word has length 46 [2022-02-24 01:12:32,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:32,148 INFO L470 AbstractCegarLoop]: Abstraction has 597 states and 796 transitions. [2022-02-24 01:12:32,148 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 01:12:32,149 INFO L276 IsEmpty]: Start isEmpty. Operand 597 states and 796 transitions. [2022-02-24 01:12:32,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:12:32,150 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:32,150 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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 01:12:32,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-24 01:12:32,150 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:32,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:32,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1776596685, now seen corresponding path program 3 times [2022-02-24 01:12:32,150 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:32,150 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1688853051] [2022-02-24 01:12:32,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:32,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:32,154 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:32,154 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:32,154 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:32,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:32,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:32,198 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:32,199 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1688853051] [2022-02-24 01:12:32,199 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1688853051] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:32,199 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:32,199 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:32,199 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235475052] [2022-02-24 01:12:32,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:32,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:32,199 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:32,200 INFO L87 Difference]: Start difference. First operand 597 states and 796 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 01:12:32,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:32,604 INFO L93 Difference]: Finished difference Result 1132 states and 1484 transitions. [2022-02-24 01:12:32,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:32,605 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 46 [2022-02-24 01:12:32,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:32,607 INFO L225 Difference]: With dead ends: 1132 [2022-02-24 01:12:32,607 INFO L226 Difference]: Without dead ends: 849 [2022-02-24 01:12:32,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=61, Invalid=121, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:32,608 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 132 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 130 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 132 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 130 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:32,609 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [132 Valid, 61 Invalid, 153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 130 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:32,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 849 states. [2022-02-24 01:12:32,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 849 to 687. [2022-02-24 01:12:32,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 687 states, 673 states have (on average 1.325408618127786) internal successors, (892), 677 states have internal predecessors, (892), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:12:32,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 687 states to 687 states and 908 transitions. [2022-02-24 01:12:32,821 INFO L78 Accepts]: Start accepts. Automaton has 687 states and 908 transitions. Word has length 46 [2022-02-24 01:12:32,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:32,821 INFO L470 AbstractCegarLoop]: Abstraction has 687 states and 908 transitions. [2022-02-24 01:12:32,821 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 01:12:32,821 INFO L276 IsEmpty]: Start isEmpty. Operand 687 states and 908 transitions. [2022-02-24 01:12:32,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-02-24 01:12:32,822 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:32,822 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 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 01:12:32,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-24 01:12:32,823 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:32,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:32,823 INFO L85 PathProgramCache]: Analyzing trace with hash -218065925, now seen corresponding path program 4 times [2022-02-24 01:12:32,823 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:32,823 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697961254] [2022-02-24 01:12:32,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:32,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:32,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:32,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:32,826 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:32,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:32,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:32,877 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:32,878 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:32,878 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697961254] [2022-02-24 01:12:32,878 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697961254] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:32,878 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:32,878 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-24 01:12:32,878 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76680939] [2022-02-24 01:12:32,878 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:32,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-24 01:12:32,880 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:32,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-24 01:12:32,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2022-02-24 01:12:32,880 INFO L87 Difference]: Start difference. First operand 687 states and 908 transitions. Second operand has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 01:12:33,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:33,266 INFO L93 Difference]: Finished difference Result 883 states and 1130 transitions. [2022-02-24 01:12:33,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-24 01:12:33,266 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 46 [2022-02-24 01:12:33,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:33,269 INFO L225 Difference]: With dead ends: 883 [2022-02-24 01:12:33,270 INFO L226 Difference]: Without dead ends: 680 [2022-02-24 01:12:33,270 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2022-02-24 01:12:33,271 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 245 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:33,271 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 79 Invalid, 245 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-24 01:12:33,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-02-24 01:12:33,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 620. [2022-02-24 01:12:33,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 620 states, 606 states have (on average 1.297029702970297) internal successors, (786), 610 states have internal predecessors, (786), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:12:33,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 620 states to 620 states and 802 transitions. [2022-02-24 01:12:33,452 INFO L78 Accepts]: Start accepts. Automaton has 620 states and 802 transitions. Word has length 46 [2022-02-24 01:12:33,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:33,452 INFO L470 AbstractCegarLoop]: Abstraction has 620 states and 802 transitions. [2022-02-24 01:12:33,452 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.625) internal successors, (37), 7 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 01:12:33,452 INFO L276 IsEmpty]: Start isEmpty. Operand 620 states and 802 transitions. [2022-02-24 01:12:33,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:12:33,453 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:33,453 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 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, 1] [2022-02-24 01:12:33,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-24 01:12:33,453 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:33,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:33,453 INFO L85 PathProgramCache]: Analyzing trace with hash 983274622, now seen corresponding path program 1 times [2022-02-24 01:12:33,453 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:33,454 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [134566239] [2022-02-24 01:12:33,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:33,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:33,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:33,456 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:33,456 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:33,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-24 01:12:34,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-02-24 01:12:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-24 01:12:34,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-24 01:12:34,622 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-24 01:12:34,622 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [134566239] [2022-02-24 01:12:34,622 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [134566239] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-24 01:12:34,622 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-24 01:12:34,622 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-24 01:12:34,623 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961780032] [2022-02-24 01:12:34,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-24 01:12:34,623 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-24 01:12:34,623 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-24 01:12:34,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-24 01:12:34,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2022-02-24 01:12:34,623 INFO L87 Difference]: Start difference. First operand 620 states and 802 transitions. Second operand has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:36,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-24 01:12:36,573 INFO L93 Difference]: Finished difference Result 1245 states and 1567 transitions. [2022-02-24 01:12:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-24 01:12:36,573 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 48 [2022-02-24 01:12:36,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-24 01:12:36,576 INFO L225 Difference]: With dead ends: 1245 [2022-02-24 01:12:36,576 INFO L226 Difference]: Without dead ends: 1086 [2022-02-24 01:12:36,576 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=389, Invalid=1333, Unknown=0, NotChecked=0, Total=1722 [2022-02-24 01:12:36,577 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 381 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 644 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 381 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 644 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-24 01:12:36,580 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [381 Valid, 59 Invalid, 857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 644 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-24 01:12:36,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2022-02-24 01:12:36,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 762. [2022-02-24 01:12:36,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 762 states, 748 states have (on average 1.3088235294117647) internal successors, (979), 752 states have internal predecessors, (979), 9 states have call successors, (9), 5 states have call predecessors, (9), 4 states have return successors, (7), 4 states have call predecessors, (7), 7 states have call successors, (7) [2022-02-24 01:12:36,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 762 states to 762 states and 995 transitions. [2022-02-24 01:12:36,833 INFO L78 Accepts]: Start accepts. Automaton has 762 states and 995 transitions. Word has length 48 [2022-02-24 01:12:36,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-24 01:12:36,833 INFO L470 AbstractCegarLoop]: Abstraction has 762 states and 995 transitions. [2022-02-24 01:12:36,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.7333333333333334) internal successors, (41), 14 states have internal predecessors, (41), 2 states have call successors, (4), 3 states have call predecessors, (4), 1 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-24 01:12:36,833 INFO L276 IsEmpty]: Start isEmpty. Operand 762 states and 995 transitions. [2022-02-24 01:12:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2022-02-24 01:12:36,836 INFO L506 BasicCegarLoop]: Found error trace [2022-02-24 01:12:36,836 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 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, 1, 1, 1] [2022-02-24 01:12:36,836 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-24 01:12:36,836 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-24 01:12:36,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-24 01:12:36,836 INFO L85 PathProgramCache]: Analyzing trace with hash 849261116, now seen corresponding path program 1 times [2022-02-24 01:12:36,836 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-24 01:12:36,836 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [777685540] [2022-02-24 01:12:36,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-24 01:12:36,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-24 01:12:36,838 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 2 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-24 01:12:36,838 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONINTEGER_UPDATE [2022-02-24 01:12:36,838 INFO L281 tedInterpolationCore]: Could not accelerate. [2022-02-24 01:12:36,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 01:12:36,863 INFO L352 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-02-24 01:12:36,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-02-24 01:12:36,893 INFO L138 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found a feasible trace [2022-02-24 01:12:36,893 INFO L628 BasicCegarLoop]: Counterexample is feasible [2022-02-24 01:12:36,895 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-24 01:12:36,896 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-24 01:12:36,897 INFO L732 BasicCegarLoop]: Path program histogram: [6, 5, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-24 01:12:36,899 INFO L180 ceAbstractionStarter]: Computing trace abstraction results [2022-02-24 01:12:36,909 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 24.02 01:12:36 BoogieIcfgContainer [2022-02-24 01:12:36,909 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-02-24 01:12:36,909 INFO L158 Benchmark]: Toolchain (without parser) took 19659.29ms. Allocated memory was 221.2MB in the beginning and 763.4MB in the end (delta: 542.1MB). Free memory was 167.9MB in the beginning and 375.9MB in the end (delta: -208.0MB). Peak memory consumption was 333.8MB. Max. memory is 8.0GB. [2022-02-24 01:12:36,910 INFO L158 Benchmark]: CDTParser took 0.10ms. Allocated memory is still 221.2MB. Free memory was 184.5MB in the beginning and 184.4MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB. [2022-02-24 01:12:36,910 INFO L158 Benchmark]: CACSL2BoogieTranslator took 317.44ms. Allocated memory is still 221.2MB. Free memory was 167.8MB in the beginning and 192.9MB in the end (delta: -25.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. [2022-02-24 01:12:36,910 INFO L158 Benchmark]: Boogie Preprocessor took 53.21ms. Allocated memory is still 221.2MB. Free memory was 192.9MB in the beginning and 190.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. [2022-02-24 01:12:36,910 INFO L158 Benchmark]: RCFGBuilder took 523.08ms. Allocated memory is still 221.2MB. Free memory was 190.8MB in the beginning and 175.1MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. [2022-02-24 01:12:36,910 INFO L158 Benchmark]: TraceAbstraction took 18748.34ms. Allocated memory was 221.2MB in the beginning and 763.4MB in the end (delta: 542.1MB). Free memory was 174.7MB in the beginning and 375.9MB in the end (delta: -201.2MB). Peak memory consumption was 341.2MB. Max. memory is 8.0GB. [2022-02-24 01:12:36,913 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.10ms. Allocated memory is still 221.2MB. Free memory was 184.5MB in the beginning and 184.4MB in the end (delta: 150.3kB). There was no memory consumed. Max. memory is 8.0GB. * CACSL2BoogieTranslator took 317.44ms. Allocated memory is still 221.2MB. Free memory was 167.8MB in the beginning and 192.9MB in the end (delta: -25.1MB). Peak memory consumption was 11.5MB. Max. memory is 8.0GB. * Boogie Preprocessor took 53.21ms. Allocated memory is still 221.2MB. Free memory was 192.9MB in the beginning and 190.8MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 8.0GB. * RCFGBuilder took 523.08ms. Allocated memory is still 221.2MB. Free memory was 190.8MB in the beginning and 175.1MB in the end (delta: 15.7MB). Peak memory consumption was 15.7MB. Max. memory is 8.0GB. * TraceAbstraction took 18748.34ms. Allocated memory was 221.2MB in the beginning and 763.4MB in the end (delta: 542.1MB). Free memory was 174.7MB in the beginning and 375.9MB in the end (delta: -201.2MB). Peak memory consumption was 341.2MB. Max. memory is 8.0GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L16] int INFINITY = 899; [L18] int nodecount = __VERIFIER_nondet_int(); [L19] int edgecount = __VERIFIER_nondet_int(); [L20] COND FALSE !(!(0 <= nodecount && nodecount <= 4)) [L21] COND FALSE !(!(0 <= edgecount && edgecount <= 19)) [L22] int source = 0; [L23] int Source[20] = {0,4,1,1,0,0,1,3,4,4,2,2,3,0,0,3,1,2,2,3}; [L24] int Dest[20] = {1,3,4,1,1,4,3,4,3,0,0,0,0,2,3,0,2,1,0,4}; [L25] int Weight[20] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19}; [L26] int distance[5]; [L27] int x,y; [L28] int i,j; [L30] i = 0 [L30] COND TRUE i < nodecount [L31] COND TRUE i == source [L32] distance[i] = 0 [L30] i++ [L30] COND TRUE i < nodecount [L31] COND FALSE !(i == source) [L35] distance[i] = INFINITY [L30] i++ [L30] COND FALSE !(i < nodecount) [L39] i = 0 [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND TRUE distance[x] > distance[y] + Weight[j] [L47] distance[x] = -1 [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND TRUE i < nodecount [L41] j = 0 [L41] COND TRUE j < edgecount [L43] EXPR Dest[j] [L43] x = Dest[j] [L44] EXPR Source[j] [L44] y = Source[j] [L45] EXPR distance[x] [L45] EXPR distance[y] [L45] EXPR Weight[j] [L45] COND FALSE !(distance[x] > distance[y] + Weight[j]) [L41] j++ [L41] COND FALSE !(j < edgecount) [L39] i++ [L39] COND FALSE !(i < nodecount) [L51] i = 0 [L51] COND TRUE i < edgecount [L53] EXPR Dest[i] [L53] x = Dest[i] [L54] EXPR Source[i] [L54] y = Source[i] [L55] EXPR distance[x] [L55] EXPR distance[y] [L55] EXPR Weight[i] [L55] COND FALSE !(distance[x] > distance[y] + Weight[i]) [L51] i++ [L51] COND FALSE !(i < edgecount) [L61] i = 0 [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND FALSE !(!(cond)) [L63] RET __VERIFIER_assert(distance[i]>=0) [L61] i++ [L61] COND TRUE i < nodecount [L63] EXPR distance[i] [L63] CALL __VERIFIER_assert(distance[i]>=0) [L11] COND TRUE !(cond) [L12] reach_error() - StatisticsResult: Ultimate Automizer benchmark data CFG has 6 procedures, 44 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 18.6s, OverallIterations: 26, TraceHistogramMax: 4, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 10.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, PartialOrderReductionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 3522 SdHoareTripleChecker+Valid, 4.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 3508 mSDsluCounter, 1562 SdHoareTripleChecker+Invalid, 3.5s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 589 mSDsCounter, 1354 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 7394 IncrementalHoareTripleChecker+Invalid, 8748 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 1354 mSolverCounterUnsat, 973 mSDtfsCounter, 7394 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 513 GetRequests, 99 SyntacticMatches, 2 SemanticMatches, 412 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1687 ImplicationChecksByTransitivity, 4.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=762occurred in iteration=25, InterpolantAutomatonStates: 287, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 1.9s AutomataMinimizationTime, 25 MinimizatonAttempts, 2386 StatesRemovedByMinimization, 24 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: No data available, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-02-24 01:12:36,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 Received shutdown request...