/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/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-6c470ae [2022-02-15 01:39:12,417 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-02-15 01:39:12,419 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-02-15 01:39:12,468 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-02-15 01:39:12,490 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-02-15 01:39:12,491 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-02-15 01:39:12,491 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-02-15 01:39:12,496 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-02-15 01:39:12,501 INFO L113 SettingsManager]: Loading preferences was successful [2022-02-15 01:39:12,502 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-02-15 01:39:12,502 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * sizeof long=4 [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * sizeof long double=12 [2022-02-15 01:39:12,503 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-02-15 01:39:12,504 INFO L138 SettingsManager]: * Use constant arrays=true [2022-02-15 01:39:12,504 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-02-15 01:39:12,504 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-02-15 01:39:12,504 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-02-15 01:39:12,504 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-02-15 01:39:12,504 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-02-15 01:39:12,504 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:39:12,504 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-02-15 01:39:12,505 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-02-15 01:39:12,505 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-02-15 01:39:12,505 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-02-15 01:39:12,505 INFO L138 SettingsManager]: * Use separate solver for trace checks=false WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-02-15 01:39:12,663 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-02-15 01:39:12,680 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-02-15 01:39:12,682 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-02-15 01:39:12,683 INFO L271 PluginConnector]: Initializing CDTParser... [2022-02-15 01:39:12,684 INFO L275 PluginConnector]: CDTParser initialized [2022-02-15 01:39:12,685 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-02-15 01:39:12,739 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf19eaa2/5d5a9a9133d042469fcb9c3e16e8ec9a/FLAG04618fe3e [2022-02-15 01:39:13,103 INFO L306 CDTParser]: Found 1 translation units. [2022-02-15 01:39:13,103 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c [2022-02-15 01:39:13,108 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf19eaa2/5d5a9a9133d042469fcb9c3e16e8ec9a/FLAG04618fe3e [2022-02-15 01:39:13,492 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/dcf19eaa2/5d5a9a9133d042469fcb9c3e16e8ec9a [2022-02-15 01:39:13,496 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-02-15 01:39:13,497 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-02-15 01:39:13,499 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-02-15 01:39:13,499 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-02-15 01:39:13,502 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-02-15 01:39:13,502 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,503 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5bcbb4d8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13, skipping insertion in model container [2022-02-15 01:39:13,503 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,507 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-02-15 01:39:13,531 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-02-15 01:39:13,706 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-02-15 01:39:13,717 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:39:13,728 INFO L203 MainTranslator]: Completed pre-run [2022-02-15 01:39:13,776 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/loop-industry-pattern/aiob_4.c.v+cfa-reducer.c[7920,7933] [2022-02-15 01:39:13,779 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-02-15 01:39:13,787 INFO L208 MainTranslator]: Completed translation [2022-02-15 01:39:13,788 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13 WrapperNode [2022-02-15 01:39:13,788 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-02-15 01:39:13,789 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-02-15 01:39:13,789 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-02-15 01:39:13,789 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-02-15 01:39:13,803 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,803 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,812 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,813 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,842 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,844 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,845 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,848 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-02-15 01:39:13,848 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-02-15 01:39:13,848 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-02-15 01:39:13,848 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-02-15 01:39:13,857 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (1/1) ... [2022-02-15 01:39:13,862 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-02-15 01:39:13,870 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-02-15 01:39:13,879 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-02-15 01:39:13,895 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-02-15 01:39:13,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-02-15 01:39:13,905 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-02-15 01:39:13,905 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-02-15 01:39:13,905 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-02-15 01:39:13,905 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure Id_MCDC_89 [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure fopen [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-02-15 01:39:13,906 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-02-15 01:39:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-02-15 01:39:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-02-15 01:39:13,907 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2022-02-15 01:39:13,908 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-02-15 01:39:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-02-15 01:39:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-02-15 01:39:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-02-15 01:39:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-02-15 01:39:13,909 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$ [2022-02-15 01:39:14,043 INFO L234 CfgBuilder]: Building ICFG [2022-02-15 01:39:14,044 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-02-15 01:39:14,412 INFO L275 CfgBuilder]: Performing block encoding [2022-02-15 01:39:14,415 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-02-15 01:39:14,416 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2022-02-15 01:39:14,417 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:39:14 BoogieIcfgContainer [2022-02-15 01:39:14,417 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-02-15 01:39:14,418 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-02-15 01:39:14,418 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-02-15 01:39:14,420 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-02-15 01:39:14,420 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 15.02 01:39:13" (1/3) ... [2022-02-15 01:39:14,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7ac9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:39:14, skipping insertion in model container [2022-02-15 01:39:14,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 15.02 01:39:13" (2/3) ... [2022-02-15 01:39:14,421 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2a7ac9d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 15.02 01:39:14, skipping insertion in model container [2022-02-15 01:39:14,421 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 15.02 01:39:14" (3/3) ... [2022-02-15 01:39:14,422 INFO L111 eAbstractionObserver]: Analyzing ICFG aiob_4.c.v+cfa-reducer.c [2022-02-15 01:39:14,425 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-02-15 01:39:14,425 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-02-15 01:39:14,460 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-02-15 01:39:14,467 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=AcceleratedInterpolation, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=JORDAN [2022-02-15 01:39:14,467 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-02-15 01:39:14,476 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-02-15 01:39:14,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 01:39:14,481 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:14,481 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:14,482 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:14,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:14,485 INFO L85 PathProgramCache]: Analyzing trace with hash 2001183330, now seen corresponding path program 1 times [2022-02-15 01:39:14,491 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:14,491 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1199794508] [2022-02-15 01:39:14,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:14,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:14,531 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:14,811 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:14,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:14,830 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:14,830 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1199794508] [2022-02-15 01:39:14,831 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1199794508] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:14,831 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:14,831 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:39:14,832 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976392904] [2022-02-15 01:39:14,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:14,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:39:14,835 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:14,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:39:14,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:39:14,860 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 14 states have internal predecessors, (19), 2 states have call successors, (2), 2 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:14,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:14,957 INFO L93 Difference]: Finished difference Result 46 states and 56 transitions. [2022-02-15 01:39:14,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:39:14,960 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-15 01:39:14,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:14,970 INFO L225 Difference]: With dead ends: 46 [2022-02-15 01:39:14,970 INFO L226 Difference]: Without dead ends: 24 [2022-02-15 01:39:14,972 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:39:14,975 INFO L933 BasicCegarLoop]: 15 mSDtfsCounter, 33 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:14,975 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [33 Valid, 41 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-02-15 01:39:14,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2022-02-15 01:39:15,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 18. [2022-02-15 01:39:15,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2022-02-15 01:39:15,005 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2022-02-15 01:39:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:15,005 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2022-02-15 01:39:15,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2022-02-15 01:39:15,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2022-02-15 01:39:15,006 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:15,007 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:15,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-02-15 01:39:15,007 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:15,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:15,008 INFO L85 PathProgramCache]: Analyzing trace with hash 2000766256, now seen corresponding path program 1 times [2022-02-15 01:39:15,008 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:15,008 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2121769075] [2022-02-15 01:39:15,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:15,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:15,013 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:15,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:15,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:15,139 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:15,139 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2121769075] [2022-02-15 01:39:15,140 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2121769075] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:15,140 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:15,140 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-02-15 01:39:15,140 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339586532] [2022-02-15 01:39:15,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:15,142 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-02-15 01:39:15,142 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:15,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-02-15 01:39:15,143 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-02-15 01:39:15,143 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:15,229 INFO L93 Difference]: Finished difference Result 28 states and 30 transitions. [2022-02-15 01:39:15,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-02-15 01:39:15,230 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2022-02-15 01:39:15,230 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:15,230 INFO L225 Difference]: With dead ends: 28 [2022-02-15 01:39:15,231 INFO L226 Difference]: Without dead ends: 26 [2022-02-15 01:39:15,231 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:39:15,232 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 11 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 31 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:15,232 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [11 Valid, 41 Invalid, 31 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:39:15,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-02-15 01:39:15,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 20. [2022-02-15 01:39:15,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2022-02-15 01:39:15,236 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 13 [2022-02-15 01:39:15,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:15,236 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2022-02-15 01:39:15,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.0) internal successors, (10), 4 states have internal predecessors, (10), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,237 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2022-02-15 01:39:15,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-02-15 01:39:15,237 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:15,237 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:15,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-02-15 01:39:15,238 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:15,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:15,238 INFO L85 PathProgramCache]: Analyzing trace with hash -1978265494, now seen corresponding path program 1 times [2022-02-15 01:39:15,238 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:15,238 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [261787717] [2022-02-15 01:39:15,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:15,256 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:15,256 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:15,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:15,258 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:15,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:15,383 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:15,383 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [261787717] [2022-02-15 01:39:15,384 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [261787717] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:15,384 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:15,385 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-02-15 01:39:15,385 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368299878] [2022-02-15 01:39:15,385 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:15,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-02-15 01:39:15,386 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:15,386 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-02-15 01:39:15,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-02-15 01:39:15,387 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:15,508 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2022-02-15 01:39:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-02-15 01:39:15,509 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-02-15 01:39:15,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:15,509 INFO L225 Difference]: With dead ends: 40 [2022-02-15 01:39:15,510 INFO L226 Difference]: Without dead ends: 30 [2022-02-15 01:39:15,510 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:39:15,515 INFO L933 BasicCegarLoop]: 14 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:15,516 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [17 Valid, 41 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:39:15,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2022-02-15 01:39:15,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 26. [2022-02-15 01:39:15,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2022-02-15 01:39:15,528 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 19 [2022-02-15 01:39:15,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:15,528 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2022-02-15 01:39:15,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,528 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2022-02-15 01:39:15,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2022-02-15 01:39:15,529 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:15,529 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:15,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-02-15 01:39:15,529 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:15,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:15,529 INFO L85 PathProgramCache]: Analyzing trace with hash 1594611826, now seen corresponding path program 2 times [2022-02-15 01:39:15,530 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:15,530 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2123393221] [2022-02-15 01:39:15,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:15,535 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:15,535 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:15,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:15,541 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:15,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:15,667 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:15,667 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2123393221] [2022-02-15 01:39:15,667 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [2123393221] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:15,667 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:15,667 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-02-15 01:39:15,668 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758756391] [2022-02-15 01:39:15,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:15,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-02-15 01:39:15,668 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:15,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-02-15 01:39:15,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-02-15 01:39:15,669 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:15,798 INFO L93 Difference]: Finished difference Result 46 states and 49 transitions. [2022-02-15 01:39:15,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-02-15 01:39:15,799 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 25 [2022-02-15 01:39:15,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:15,800 INFO L225 Difference]: With dead ends: 46 [2022-02-15 01:39:15,800 INFO L226 Difference]: Without dead ends: 36 [2022-02-15 01:39:15,800 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:39:15,801 INFO L933 BasicCegarLoop]: 16 mSDtfsCounter, 20 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 69 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 69 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:15,801 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [20 Valid, 59 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 69 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:39:15,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2022-02-15 01:39:15,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 32. [2022-02-15 01:39:15,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2022-02-15 01:39:15,818 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 25 [2022-02-15 01:39:15,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:15,819 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2022-02-15 01:39:15,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.142857142857143) internal successors, (22), 6 states have internal predecessors, (22), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:15,819 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2022-02-15 01:39:15,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-02-15 01:39:15,820 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:15,820 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:15,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-02-15 01:39:15,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:15,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:15,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1841134202, now seen corresponding path program 3 times [2022-02-15 01:39:15,821 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:15,821 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1769027439] [2022-02-15 01:39:15,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:15,825 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:15,825 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:15,825 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:15,827 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:15,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:15,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:15,963 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:15,963 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1769027439] [2022-02-15 01:39:15,964 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1769027439] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:15,964 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:15,964 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-02-15 01:39:15,965 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841889615] [2022-02-15 01:39:15,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:15,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-02-15 01:39:15,965 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:15,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-02-15 01:39:15,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=43, Unknown=0, NotChecked=0, Total=56 [2022-02-15 01:39:15,966 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:16,118 INFO L93 Difference]: Finished difference Result 52 states and 55 transitions. [2022-02-15 01:39:16,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-02-15 01:39:16,119 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-02-15 01:39:16,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:16,119 INFO L225 Difference]: With dead ends: 52 [2022-02-15 01:39:16,120 INFO L226 Difference]: Without dead ends: 42 [2022-02-15 01:39:16,120 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:39:16,120 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 63 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:16,121 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 81 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:39:16,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-02-15 01:39:16,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2022-02-15 01:39:16,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2022-02-15 01:39:16,138 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 31 [2022-02-15 01:39:16,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:16,139 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2022-02-15 01:39:16,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.5) internal successors, (28), 7 states have internal predecessors, (28), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,139 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2022-02-15 01:39:16,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2022-02-15 01:39:16,140 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:16,140 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:16,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-02-15 01:39:16,140 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:16,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:16,141 INFO L85 PathProgramCache]: Analyzing trace with hash 1281324674, now seen corresponding path program 4 times [2022-02-15 01:39:16,141 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:16,141 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654869070] [2022-02-15 01:39:16,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:16,143 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:16,143 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:16,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:16,145 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:16,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:16,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:16,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:16,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:16,263 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:16,263 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654869070] [2022-02-15 01:39:16,263 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [654869070] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:16,263 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:16,263 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-02-15 01:39:16,263 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577559376] [2022-02-15 01:39:16,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:16,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-02-15 01:39:16,264 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:16,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-02-15 01:39:16,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=57, Unknown=0, NotChecked=0, Total=72 [2022-02-15 01:39:16,265 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:16,499 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2022-02-15 01:39:16,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-02-15 01:39:16,499 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 37 [2022-02-15 01:39:16,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:16,500 INFO L225 Difference]: With dead ends: 58 [2022-02-15 01:39:16,500 INFO L226 Difference]: Without dead ends: 48 [2022-02-15 01:39:16,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:39:16,501 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 149 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 107 SdHoareTripleChecker+Invalid, 161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 149 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:16,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [26 Valid, 107 Invalid, 161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 149 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-02-15 01:39:16,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2022-02-15 01:39:16,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2022-02-15 01:39:16,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2022-02-15 01:39:16,509 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 37 [2022-02-15 01:39:16,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:16,509 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2022-02-15 01:39:16,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.7777777777777777) internal successors, (34), 8 states have internal predecessors, (34), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,509 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2022-02-15 01:39:16,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-02-15 01:39:16,510 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:16,510 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:16,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-02-15 01:39:16,510 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:16,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:16,510 INFO L85 PathProgramCache]: Analyzing trace with hash 935742602, now seen corresponding path program 5 times [2022-02-15 01:39:16,510 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:16,511 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1271242223] [2022-02-15 01:39:16,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:16,513 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:16,514 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:16,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:16,516 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:16,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:16,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:16,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:16,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:16,659 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:16,659 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1271242223] [2022-02-15 01:39:16,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1271242223] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:16,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:16,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-02-15 01:39:16,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126615548] [2022-02-15 01:39:16,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:16,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-02-15 01:39:16,660 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:16,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-02-15 01:39:16,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=73, Unknown=0, NotChecked=0, Total=90 [2022-02-15 01:39:16,661 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:16,915 INFO L93 Difference]: Finished difference Result 64 states and 67 transitions. [2022-02-15 01:39:16,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-02-15 01:39:16,916 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-02-15 01:39:16,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:16,917 INFO L225 Difference]: With dead ends: 64 [2022-02-15 01:39:16,917 INFO L226 Difference]: Without dead ends: 54 [2022-02-15 01:39:16,918 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:39:16,918 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 29 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 215 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:16,918 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 137 Invalid, 215 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:39:16,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-02-15 01:39:16,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2022-02-15 01:39:16,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 states have internal predecessors, (48), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2022-02-15 01:39:16,926 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 43 [2022-02-15 01:39:16,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:16,926 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2022-02-15 01:39:16,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 9 states have internal predecessors, (40), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:16,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2022-02-15 01:39:16,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2022-02-15 01:39:16,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:16,928 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:16,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-02-15 01:39:16,928 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:16,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:16,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1687782254, now seen corresponding path program 6 times [2022-02-15 01:39:16,929 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:16,929 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [986405115] [2022-02-15 01:39:16,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:16,932 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:16,932 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:16,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:16,934 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:16,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:17,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:17,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:17,102 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:17,102 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [986405115] [2022-02-15 01:39:17,102 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [986405115] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:17,102 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:17,102 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-02-15 01:39:17,102 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832367313] [2022-02-15 01:39:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:17,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-02-15 01:39:17,102 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-02-15 01:39:17,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=91, Unknown=0, NotChecked=0, Total=110 [2022-02-15 01:39:17,103 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:17,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:17,376 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2022-02-15 01:39:17,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-02-15 01:39:17,376 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 49 [2022-02-15 01:39:17,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:17,377 INFO L225 Difference]: With dead ends: 70 [2022-02-15 01:39:17,377 INFO L226 Difference]: Without dead ends: 60 [2022-02-15 01:39:17,377 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:39:17,378 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 32 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 32 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 277 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:17,378 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [32 Valid, 171 Invalid, 277 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:39:17,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2022-02-15 01:39:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2022-02-15 01:39:17,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2022-02-15 01:39:17,387 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 49 [2022-02-15 01:39:17,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:17,388 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2022-02-15 01:39:17,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.181818181818182) internal successors, (46), 10 states have internal predecessors, (46), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:17,388 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2022-02-15 01:39:17,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-02-15 01:39:17,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:17,389 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:17,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-02-15 01:39:17,389 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:17,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:17,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1722513766, now seen corresponding path program 7 times [2022-02-15 01:39:17,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:17,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [337894818] [2022-02-15 01:39:17,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:17,392 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:17,392 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:17,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:17,393 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:17,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:17,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:17,554 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:17,554 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [337894818] [2022-02-15 01:39:17,554 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [337894818] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:17,554 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:17,554 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-02-15 01:39:17,554 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [134422831] [2022-02-15 01:39:17,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:17,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-02-15 01:39:17,555 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-02-15 01:39:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2022-02-15 01:39:17,555 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:17,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:17,866 INFO L93 Difference]: Finished difference Result 76 states and 79 transitions. [2022-02-15 01:39:17,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-02-15 01:39:17,867 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-02-15 01:39:17,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:17,868 INFO L225 Difference]: With dead ends: 76 [2022-02-15 01:39:17,868 INFO L226 Difference]: Without dead ends: 66 [2022-02-15 01:39:17,868 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:39:17,868 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 35 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 329 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 347 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 329 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:17,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [35 Valid, 209 Invalid, 347 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 329 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:39:17,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2022-02-15 01:39:17,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 62. [2022-02-15 01:39:17,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:17,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 63 transitions. [2022-02-15 01:39:17,886 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 63 transitions. Word has length 55 [2022-02-15 01:39:17,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:17,887 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 63 transitions. [2022-02-15 01:39:17,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 4.333333333333333) internal successors, (52), 11 states have internal predecessors, (52), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:17,887 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 63 transitions. [2022-02-15 01:39:17,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2022-02-15 01:39:17,888 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:17,888 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:17,888 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-02-15 01:39:17,888 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:17,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash -1840977246, now seen corresponding path program 8 times [2022-02-15 01:39:17,888 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:17,888 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [274235322] [2022-02-15 01:39:17,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:17,891 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:17,891 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:17,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:17,893 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:17,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:18,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:18,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:18,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:18,080 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:18,080 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [274235322] [2022-02-15 01:39:18,080 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [274235322] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:18,080 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:18,080 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-02-15 01:39:18,080 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074225909] [2022-02-15 01:39:18,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:18,080 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-02-15 01:39:18,080 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:18,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-02-15 01:39:18,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=133, Unknown=0, NotChecked=0, Total=156 [2022-02-15 01:39:18,081 INFO L87 Difference]: Start difference. First operand 62 states and 63 transitions. Second operand has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:18,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:18,413 INFO L93 Difference]: Finished difference Result 82 states and 85 transitions. [2022-02-15 01:39:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-02-15 01:39:18,414 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 61 [2022-02-15 01:39:18,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:18,414 INFO L225 Difference]: With dead ends: 82 [2022-02-15 01:39:18,414 INFO L226 Difference]: Without dead ends: 72 [2022-02-15 01:39:18,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:39:18,415 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 38 mSDsluCounter, 223 mSDsCounter, 0 mSdLazyCounter, 405 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 425 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:18,416 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [38 Valid, 251 Invalid, 425 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 405 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:39:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2022-02-15 01:39:18,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 68. [2022-02-15 01:39:18,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 64 states have (on average 1.03125) internal successors, (66), 64 states have internal predecessors, (66), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:18,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2022-02-15 01:39:18,428 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 61 [2022-02-15 01:39:18,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:18,428 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2022-02-15 01:39:18,428 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.461538461538462) internal successors, (58), 12 states have internal predecessors, (58), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:18,428 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2022-02-15 01:39:18,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-02-15 01:39:18,429 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:18,429 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:18,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-02-15 01:39:18,429 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:18,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:18,429 INFO L85 PathProgramCache]: Analyzing trace with hash -1383323478, now seen corresponding path program 9 times [2022-02-15 01:39:18,429 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:18,429 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328207048] [2022-02-15 01:39:18,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:18,431 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:18,431 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:18,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:18,433 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:18,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:18,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:18,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:18,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:18,605 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:18,605 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328207048] [2022-02-15 01:39:18,605 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [328207048] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:18,605 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:18,605 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-02-15 01:39:18,605 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735724245] [2022-02-15 01:39:18,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:18,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-02-15 01:39:18,606 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:18,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-02-15 01:39:18,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2022-02-15 01:39:18,607 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:18,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:18,976 INFO L93 Difference]: Finished difference Result 88 states and 91 transitions. [2022-02-15 01:39:18,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-02-15 01:39:18,977 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-02-15 01:39:18,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:18,977 INFO L225 Difference]: With dead ends: 88 [2022-02-15 01:39:18,977 INFO L226 Difference]: Without dead ends: 78 [2022-02-15 01:39:18,978 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=76, Invalid=574, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:39:18,978 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 41 mSDsluCounter, 267 mSDsCounter, 0 mSdLazyCounter, 489 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 297 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:18,978 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [41 Valid, 297 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 489 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-02-15 01:39:18,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2022-02-15 01:39:18,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2022-02-15 01:39:18,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 70 states have (on average 1.0285714285714285) internal successors, (72), 70 states have internal predecessors, (72), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:18,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 75 transitions. [2022-02-15 01:39:18,987 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 75 transitions. Word has length 67 [2022-02-15 01:39:18,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:18,988 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 75 transitions. [2022-02-15 01:39:18,988 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 4.571428571428571) internal successors, (64), 13 states have internal predecessors, (64), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:18,988 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 75 transitions. [2022-02-15 01:39:18,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2022-02-15 01:39:18,988 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:18,989 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:18,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-02-15 01:39:18,989 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:18,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:18,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1629405362, now seen corresponding path program 10 times [2022-02-15 01:39:18,989 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:18,989 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1067390761] [2022-02-15 01:39:18,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:18,991 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:18,991 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:18,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:18,993 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:19,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:19,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:19,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:19,174 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:19,174 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1067390761] [2022-02-15 01:39:19,174 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1067390761] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:19,174 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:19,174 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-02-15 01:39:19,174 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1606247387] [2022-02-15 01:39:19,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:19,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-02-15 01:39:19,174 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:19,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-02-15 01:39:19,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=183, Unknown=0, NotChecked=0, Total=210 [2022-02-15 01:39:19,175 INFO L87 Difference]: Start difference. First operand 74 states and 75 transitions. Second operand has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:19,616 INFO L93 Difference]: Finished difference Result 94 states and 97 transitions. [2022-02-15 01:39:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-02-15 01:39:19,618 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 73 [2022-02-15 01:39:19,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:19,618 INFO L225 Difference]: With dead ends: 94 [2022-02-15 01:39:19,618 INFO L226 Difference]: Without dead ends: 84 [2022-02-15 01:39:19,619 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=674, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:39:19,619 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 44 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 581 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 347 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 581 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:19,619 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 347 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 581 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:39:19,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2022-02-15 01:39:19,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 80. [2022-02-15 01:39:19,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 76 states have (on average 1.0263157894736843) internal successors, (78), 76 states have internal predecessors, (78), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:19,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2022-02-15 01:39:19,629 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 73 [2022-02-15 01:39:19,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:19,630 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2022-02-15 01:39:19,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.666666666666667) internal successors, (70), 14 states have internal predecessors, (70), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:19,630 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2022-02-15 01:39:19,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-02-15 01:39:19,631 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:19,631 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:19,631 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-02-15 01:39:19,631 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:19,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:19,631 INFO L85 PathProgramCache]: Analyzing trace with hash -107924806, now seen corresponding path program 11 times [2022-02-15 01:39:19,631 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:19,631 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1144581643] [2022-02-15 01:39:19,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:19,637 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:19,637 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:19,637 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:19,641 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:19,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:19,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:19,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:19,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:19,900 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:19,900 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1144581643] [2022-02-15 01:39:19,900 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1144581643] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:19,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:19,901 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-02-15 01:39:19,901 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850437383] [2022-02-15 01:39:19,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:19,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-02-15 01:39:19,901 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:19,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-02-15 01:39:19,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=211, Unknown=0, NotChecked=0, Total=240 [2022-02-15 01:39:19,903 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:20,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:20,424 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2022-02-15 01:39:20,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-02-15 01:39:20,425 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-02-15 01:39:20,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:20,425 INFO L225 Difference]: With dead ends: 100 [2022-02-15 01:39:20,426 INFO L226 Difference]: Without dead ends: 90 [2022-02-15 01:39:20,426 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=88, Invalid=782, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:39:20,427 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 47 mSDsluCounter, 367 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 401 SdHoareTripleChecker+Invalid, 707 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:20,427 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [47 Valid, 401 Invalid, 707 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-02-15 01:39:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2022-02-15 01:39:20,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 86. [2022-02-15 01:39:20,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 82 states have (on average 1.024390243902439) internal successors, (84), 82 states have internal predecessors, (84), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:20,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 87 transitions. [2022-02-15 01:39:20,443 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 87 transitions. Word has length 79 [2022-02-15 01:39:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:20,443 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 87 transitions. [2022-02-15 01:39:20,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 4.75) internal successors, (76), 15 states have internal predecessors, (76), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 87 transitions. [2022-02-15 01:39:20,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2022-02-15 01:39:20,447 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:20,447 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:20,447 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-02-15 01:39:20,447 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:20,447 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:20,447 INFO L85 PathProgramCache]: Analyzing trace with hash 571997890, now seen corresponding path program 12 times [2022-02-15 01:39:20,447 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:20,448 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1039019307] [2022-02-15 01:39:20,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:20,455 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:20,456 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:20,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:20,458 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:20,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:20,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:20,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:20,681 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:20,682 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:20,682 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1039019307] [2022-02-15 01:39:20,682 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1039019307] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:20,682 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:20,682 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-02-15 01:39:20,682 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913581170] [2022-02-15 01:39:20,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:20,682 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-02-15 01:39:20,682 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:20,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-02-15 01:39:20,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=241, Unknown=0, NotChecked=0, Total=272 [2022-02-15 01:39:20,683 INFO L87 Difference]: Start difference. First operand 86 states and 87 transitions. Second operand has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:21,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:21,275 INFO L93 Difference]: Finished difference Result 106 states and 109 transitions. [2022-02-15 01:39:21,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-02-15 01:39:21,275 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 85 [2022-02-15 01:39:21,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:21,276 INFO L225 Difference]: With dead ends: 106 [2022-02-15 01:39:21,276 INFO L226 Difference]: Without dead ends: 96 [2022-02-15 01:39:21,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=94, Invalid=898, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:39:21,277 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 50 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 789 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 50 SdHoareTripleChecker+Valid, 459 SdHoareTripleChecker+Invalid, 817 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 789 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:21,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [50 Valid, 459 Invalid, 817 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 789 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:39:21,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2022-02-15 01:39:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 92. [2022-02-15 01:39:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 88 states have (on average 1.0227272727272727) internal successors, (90), 88 states have internal predecessors, (90), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2022-02-15 01:39:21,290 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 85 [2022-02-15 01:39:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:21,290 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2022-02-15 01:39:21,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 4.823529411764706) internal successors, (82), 16 states have internal predecessors, (82), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2022-02-15 01:39:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-02-15 01:39:21,291 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:21,291 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:21,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-02-15 01:39:21,292 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:21,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:21,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1820828874, now seen corresponding path program 13 times [2022-02-15 01:39:21,292 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:21,292 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1680686231] [2022-02-15 01:39:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:21,294 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:21,294 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:21,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:21,296 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:21,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:21,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:21,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:21,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:21,548 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:21,548 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1680686231] [2022-02-15 01:39:21,548 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1680686231] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:21,548 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:21,549 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-02-15 01:39:21,549 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574332253] [2022-02-15 01:39:21,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:21,549 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-02-15 01:39:21,549 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:21,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-02-15 01:39:21,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=273, Unknown=0, NotChecked=0, Total=306 [2022-02-15 01:39:21,550 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:22,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:22,176 INFO L93 Difference]: Finished difference Result 112 states and 115 transitions. [2022-02-15 01:39:22,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-02-15 01:39:22,177 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-02-15 01:39:22,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:22,177 INFO L225 Difference]: With dead ends: 112 [2022-02-15 01:39:22,177 INFO L226 Difference]: Without dead ends: 102 [2022-02-15 01:39:22,178 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=1022, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:39:22,178 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 53 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 521 SdHoareTripleChecker+Invalid, 935 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:22,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [53 Valid, 521 Invalid, 935 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-02-15 01:39:22,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2022-02-15 01:39:22,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 98. [2022-02-15 01:39:22,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 94 states have (on average 1.0212765957446808) internal successors, (96), 94 states have internal predecessors, (96), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:22,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 99 transitions. [2022-02-15 01:39:22,191 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 99 transitions. Word has length 91 [2022-02-15 01:39:22,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:22,192 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 99 transitions. [2022-02-15 01:39:22,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 4.888888888888889) internal successors, (88), 17 states have internal predecessors, (88), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:22,192 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 99 transitions. [2022-02-15 01:39:22,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2022-02-15 01:39:22,192 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:22,192 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:22,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-02-15 01:39:22,193 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:22,193 INFO L85 PathProgramCache]: Analyzing trace with hash -648764206, now seen corresponding path program 14 times [2022-02-15 01:39:22,193 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:22,193 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [731086151] [2022-02-15 01:39:22,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:22,195 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:22,195 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:22,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:22,197 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:22,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:22,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:22,436 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:22,436 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [731086151] [2022-02-15 01:39:22,436 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [731086151] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:22,437 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:22,437 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-02-15 01:39:22,437 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619887502] [2022-02-15 01:39:22,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:22,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-02-15 01:39:22,437 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:22,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-02-15 01:39:22,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=307, Unknown=0, NotChecked=0, Total=342 [2022-02-15 01:39:22,438 INFO L87 Difference]: Start difference. First operand 98 states and 99 transitions. Second operand has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 18 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:23,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:23,122 INFO L93 Difference]: Finished difference Result 118 states and 121 transitions. [2022-02-15 01:39:23,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-02-15 01:39:23,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 18 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 97 [2022-02-15 01:39:23,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:23,123 INFO L225 Difference]: With dead ends: 118 [2022-02-15 01:39:23,123 INFO L226 Difference]: Without dead ends: 108 [2022-02-15 01:39:23,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=106, Invalid=1154, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:39:23,124 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 56 mSDsluCounter, 547 mSDsCounter, 0 mSdLazyCounter, 1029 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 587 SdHoareTripleChecker+Invalid, 1061 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 1029 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:23,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [56 Valid, 587 Invalid, 1061 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 1029 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2022-02-15 01:39:23,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 104. [2022-02-15 01:39:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 100 states have (on average 1.02) internal successors, (102), 100 states have internal predecessors, (102), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:23,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2022-02-15 01:39:23,161 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 97 [2022-02-15 01:39:23,161 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:23,162 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2022-02-15 01:39:23,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 4.947368421052632) internal successors, (94), 18 states have internal predecessors, (94), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:23,162 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2022-02-15 01:39:23,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-02-15 01:39:23,162 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:23,162 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:23,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-02-15 01:39:23,163 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:23,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:23,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1603501786, now seen corresponding path program 15 times [2022-02-15 01:39:23,163 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:23,163 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [144161122] [2022-02-15 01:39:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:23,167 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:23,167 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:23,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:23,169 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:23,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:23,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:23,471 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:23,471 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [144161122] [2022-02-15 01:39:23,471 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [144161122] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:23,471 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:23,471 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-02-15 01:39:23,472 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201256969] [2022-02-15 01:39:23,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:23,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-02-15 01:39:23,472 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:23,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-02-15 01:39:23,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=343, Unknown=0, NotChecked=0, Total=380 [2022-02-15 01:39:23,472 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 20 states, 20 states have (on average 5.0) internal successors, (100), 19 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:24,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:24,219 INFO L93 Difference]: Finished difference Result 124 states and 127 transitions. [2022-02-15 01:39:24,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-02-15 01:39:24,219 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 19 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-02-15 01:39:24,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:24,220 INFO L225 Difference]: With dead ends: 124 [2022-02-15 01:39:24,220 INFO L226 Difference]: Without dead ends: 114 [2022-02-15 01:39:24,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=112, Invalid=1294, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:39:24,221 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 59 mSDsluCounter, 615 mSDsCounter, 0 mSdLazyCounter, 1161 mSolverCounterSat, 34 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 59 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 34 IncrementalHoareTripleChecker+Valid, 1161 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:24,221 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [59 Valid, 657 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [34 Valid, 1161 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:24,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2022-02-15 01:39:24,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 110. [2022-02-15 01:39:24,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 106 states have (on average 1.0188679245283019) internal successors, (108), 106 states have internal predecessors, (108), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:24,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 111 transitions. [2022-02-15 01:39:24,235 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 111 transitions. Word has length 103 [2022-02-15 01:39:24,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:24,236 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 111 transitions. [2022-02-15 01:39:24,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 5.0) internal successors, (100), 19 states have internal predecessors, (100), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:24,236 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 111 transitions. [2022-02-15 01:39:24,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2022-02-15 01:39:24,236 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:24,236 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:24,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-02-15 01:39:24,237 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:24,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:24,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1962455778, now seen corresponding path program 16 times [2022-02-15 01:39:24,237 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:24,237 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [654159789] [2022-02-15 01:39:24,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:24,239 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:24,239 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:24,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:24,241 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:24,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:24,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:24,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:24,520 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:24,520 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [654159789] [2022-02-15 01:39:24,520 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [654159789] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:24,520 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:24,520 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-02-15 01:39:24,520 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214855840] [2022-02-15 01:39:24,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:24,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-02-15 01:39:24,520 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:24,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-02-15 01:39:24,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=381, Unknown=0, NotChecked=0, Total=420 [2022-02-15 01:39:24,521 INFO L87 Difference]: Start difference. First operand 110 states and 111 transitions. Second operand has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 20 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:25,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:25,338 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2022-02-15 01:39:25,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-02-15 01:39:25,339 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 20 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 109 [2022-02-15 01:39:25,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:25,340 INFO L225 Difference]: With dead ends: 130 [2022-02-15 01:39:25,340 INFO L226 Difference]: Without dead ends: 120 [2022-02-15 01:39:25,340 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=118, Invalid=1442, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:39:25,341 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 62 mSDsluCounter, 687 mSDsCounter, 0 mSdLazyCounter, 1301 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 731 SdHoareTripleChecker+Invalid, 1337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 1301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:25,343 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 731 Invalid, 1337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 1301 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-02-15 01:39:25,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2022-02-15 01:39:25,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 116. [2022-02-15 01:39:25,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 112 states have (on average 1.0178571428571428) internal successors, (114), 112 states have internal predecessors, (114), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:25,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2022-02-15 01:39:25,358 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 109 [2022-02-15 01:39:25,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:25,358 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2022-02-15 01:39:25,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 5.0476190476190474) internal successors, (106), 20 states have internal predecessors, (106), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:25,359 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2022-02-15 01:39:25,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-02-15 01:39:25,359 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:25,359 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:25,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-02-15 01:39:25,359 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:25,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:25,360 INFO L85 PathProgramCache]: Analyzing trace with hash -1780956950, now seen corresponding path program 17 times [2022-02-15 01:39:25,360 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:25,360 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [120637158] [2022-02-15 01:39:25,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:25,361 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:25,362 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:25,362 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:25,363 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:25,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:25,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:25,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:25,660 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:25,660 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [120637158] [2022-02-15 01:39:25,660 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [120637158] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:25,660 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:25,660 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-02-15 01:39:25,660 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546968642] [2022-02-15 01:39:25,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:25,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-02-15 01:39:25,661 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:25,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-02-15 01:39:25,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=421, Unknown=0, NotChecked=0, Total=462 [2022-02-15 01:39:25,661 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 21 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:26,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:26,554 INFO L93 Difference]: Finished difference Result 136 states and 139 transitions. [2022-02-15 01:39:26,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-02-15 01:39:26,554 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 21 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-02-15 01:39:26,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:26,555 INFO L225 Difference]: With dead ends: 136 [2022-02-15 01:39:26,555 INFO L226 Difference]: Without dead ends: 126 [2022-02-15 01:39:26,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=124, Invalid=1598, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:39:26,556 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 65 mSDsluCounter, 763 mSDsCounter, 0 mSdLazyCounter, 1449 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 1449 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:26,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [65 Valid, 809 Invalid, 1487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 1449 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:39:26,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2022-02-15 01:39:26,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 122. [2022-02-15 01:39:26,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 118 states have (on average 1.0169491525423728) internal successors, (120), 118 states have internal predecessors, (120), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:26,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 123 transitions. [2022-02-15 01:39:26,578 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 123 transitions. Word has length 115 [2022-02-15 01:39:26,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:26,578 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 123 transitions. [2022-02-15 01:39:26,578 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 5.090909090909091) internal successors, (112), 21 states have internal predecessors, (112), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:26,579 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 123 transitions. [2022-02-15 01:39:26,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2022-02-15 01:39:26,579 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:26,579 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:26,579 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-02-15 01:39:26,580 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:26,580 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -853006094, now seen corresponding path program 18 times [2022-02-15 01:39:26,580 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:26,580 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [221900631] [2022-02-15 01:39:26,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:26,583 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:26,583 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:26,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:26,585 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:26,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:26,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:26,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:26,901 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:26,901 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [221900631] [2022-02-15 01:39:26,901 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [221900631] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:26,901 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:26,902 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-02-15 01:39:26,902 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605008365] [2022-02-15 01:39:26,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:26,902 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-02-15 01:39:26,902 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:26,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-02-15 01:39:26,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=463, Unknown=0, NotChecked=0, Total=506 [2022-02-15 01:39:26,902 INFO L87 Difference]: Start difference. First operand 122 states and 123 transitions. Second operand has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 22 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:27,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:27,837 INFO L93 Difference]: Finished difference Result 142 states and 145 transitions. [2022-02-15 01:39:27,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-02-15 01:39:27,837 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 22 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 121 [2022-02-15 01:39:27,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:27,838 INFO L225 Difference]: With dead ends: 142 [2022-02-15 01:39:27,838 INFO L226 Difference]: Without dead ends: 132 [2022-02-15 01:39:27,839 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=130, Invalid=1762, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:39:27,839 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 68 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 1605 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 891 SdHoareTripleChecker+Invalid, 1645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 1605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:27,840 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [68 Valid, 891 Invalid, 1645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 1605 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-02-15 01:39:27,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2022-02-15 01:39:27,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 128. [2022-02-15 01:39:27,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 124 states have (on average 1.0161290322580645) internal successors, (126), 124 states have internal predecessors, (126), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:27,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2022-02-15 01:39:27,857 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 121 [2022-02-15 01:39:27,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:27,857 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2022-02-15 01:39:27,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 5.130434782608695) internal successors, (118), 22 states have internal predecessors, (118), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:27,857 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2022-02-15 01:39:27,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-02-15 01:39:27,858 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:27,858 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:27,858 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-02-15 01:39:27,858 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:27,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:27,858 INFO L85 PathProgramCache]: Analyzing trace with hash 1014721274, now seen corresponding path program 19 times [2022-02-15 01:39:27,858 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:27,858 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [933477203] [2022-02-15 01:39:27,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:27,860 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:27,860 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:27,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:27,862 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:27,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:28,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:28,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:28,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:28,309 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:28,309 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [933477203] [2022-02-15 01:39:28,309 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [933477203] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:28,309 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:28,309 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-02-15 01:39:28,309 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005699366] [2022-02-15 01:39:28,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:28,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-02-15 01:39:28,309 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-02-15 01:39:28,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=507, Unknown=0, NotChecked=0, Total=552 [2022-02-15 01:39:28,310 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 23 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:29,315 INFO L93 Difference]: Finished difference Result 148 states and 151 transitions. [2022-02-15 01:39:29,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-02-15 01:39:29,317 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 23 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-02-15 01:39:29,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:29,318 INFO L225 Difference]: With dead ends: 148 [2022-02-15 01:39:29,318 INFO L226 Difference]: Without dead ends: 138 [2022-02-15 01:39:29,318 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=136, Invalid=1934, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:39:29,319 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 71 mSDsluCounter, 927 mSDsCounter, 0 mSdLazyCounter, 1769 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 977 SdHoareTripleChecker+Invalid, 1811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 1769 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:29,319 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 977 Invalid, 1811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 1769 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:39:29,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-02-15 01:39:29,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2022-02-15 01:39:29,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 130 states have (on average 1.0153846153846153) internal successors, (132), 130 states have internal predecessors, (132), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 135 transitions. [2022-02-15 01:39:29,337 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 135 transitions. Word has length 127 [2022-02-15 01:39:29,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:29,338 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 135 transitions. [2022-02-15 01:39:29,338 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 5.166666666666667) internal successors, (124), 23 states have internal predecessors, (124), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:29,338 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 135 transitions. [2022-02-15 01:39:29,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2022-02-15 01:39:29,338 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:29,338 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:29,339 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-02-15 01:39:29,339 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:29,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:29,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1543043326, now seen corresponding path program 20 times [2022-02-15 01:39:29,339 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:29,339 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579795580] [2022-02-15 01:39:29,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:29,341 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:29,341 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:29,341 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:29,343 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:29,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:29,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:29,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:29,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:29,684 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:29,684 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579795580] [2022-02-15 01:39:29,684 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579795580] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:29,684 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:29,684 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-02-15 01:39:29,684 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663587620] [2022-02-15 01:39:29,684 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:29,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-02-15 01:39:29,685 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:29,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-02-15 01:39:29,685 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=553, Unknown=0, NotChecked=0, Total=600 [2022-02-15 01:39:29,685 INFO L87 Difference]: Start difference. First operand 134 states and 135 transitions. Second operand has 25 states, 25 states have (on average 5.2) internal successors, (130), 24 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:30,768 INFO L93 Difference]: Finished difference Result 154 states and 157 transitions. [2022-02-15 01:39:30,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-02-15 01:39:30,770 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 24 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 133 [2022-02-15 01:39:30,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:30,771 INFO L225 Difference]: With dead ends: 154 [2022-02-15 01:39:30,771 INFO L226 Difference]: Without dead ends: 144 [2022-02-15 01:39:30,772 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=142, Invalid=2114, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:39:30,772 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 74 mSDsluCounter, 1015 mSDsCounter, 0 mSdLazyCounter, 1941 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 1067 SdHoareTripleChecker+Invalid, 1985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 1941 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:30,772 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 1067 Invalid, 1985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 1941 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-02-15 01:39:30,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2022-02-15 01:39:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 140. [2022-02-15 01:39:30,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 136 states have (on average 1.0147058823529411) internal successors, (138), 136 states have internal predecessors, (138), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2022-02-15 01:39:30,793 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 133 [2022-02-15 01:39:30,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:30,793 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2022-02-15 01:39:30,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 5.2) internal successors, (130), 24 states have internal predecessors, (130), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:30,793 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2022-02-15 01:39:30,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-02-15 01:39:30,794 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:30,794 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:30,794 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-02-15 01:39:30,794 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:30,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:30,794 INFO L85 PathProgramCache]: Analyzing trace with hash -358646518, now seen corresponding path program 21 times [2022-02-15 01:39:30,794 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:30,794 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [3216667] [2022-02-15 01:39:30,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:30,796 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:30,796 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:30,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:30,798 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:30,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:31,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:31,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:31,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:31,196 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:31,196 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [3216667] [2022-02-15 01:39:31,196 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [3216667] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:31,196 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:31,196 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-02-15 01:39:31,196 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142005860] [2022-02-15 01:39:31,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:31,197 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-02-15 01:39:31,197 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:31,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-02-15 01:39:31,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=601, Unknown=0, NotChecked=0, Total=650 [2022-02-15 01:39:31,197 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 25 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:32,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:32,365 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2022-02-15 01:39:32,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-02-15 01:39:32,365 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 25 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-02-15 01:39:32,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:32,366 INFO L225 Difference]: With dead ends: 160 [2022-02-15 01:39:32,366 INFO L226 Difference]: Without dead ends: 150 [2022-02-15 01:39:32,366 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=148, Invalid=2302, Unknown=0, NotChecked=0, Total=2450 [2022-02-15 01:39:32,366 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 77 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 2121 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 77 SdHoareTripleChecker+Valid, 1161 SdHoareTripleChecker+Invalid, 2167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 2121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:32,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [77 Valid, 1161 Invalid, 2167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 2121 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-02-15 01:39:32,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2022-02-15 01:39:32,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 146. [2022-02-15 01:39:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 142 states have (on average 1.0140845070422535) internal successors, (144), 142 states have internal predecessors, (144), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 147 transitions. [2022-02-15 01:39:32,388 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 147 transitions. Word has length 139 [2022-02-15 01:39:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:32,388 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 147 transitions. [2022-02-15 01:39:32,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 5.230769230769231) internal successors, (136), 25 states have internal predecessors, (136), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 147 transitions. [2022-02-15 01:39:32,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2022-02-15 01:39:32,389 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:32,389 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:32,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-02-15 01:39:32,389 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:32,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:32,389 INFO L85 PathProgramCache]: Analyzing trace with hash -1514582766, now seen corresponding path program 22 times [2022-02-15 01:39:32,389 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:32,389 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1137241849] [2022-02-15 01:39:32,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:32,391 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:32,391 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:32,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:32,393 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:32,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:32,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:32,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:32,768 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:32,768 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:32,768 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1137241849] [2022-02-15 01:39:32,768 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1137241849] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:32,768 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:32,768 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-02-15 01:39:32,768 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011078680] [2022-02-15 01:39:32,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:32,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-02-15 01:39:32,769 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:32,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-02-15 01:39:32,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=651, Unknown=0, NotChecked=0, Total=702 [2022-02-15 01:39:32,770 INFO L87 Difference]: Start difference. First operand 146 states and 147 transitions. Second operand has 27 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 26 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:34,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:34,054 INFO L93 Difference]: Finished difference Result 166 states and 169 transitions. [2022-02-15 01:39:34,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-02-15 01:39:34,054 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 26 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 145 [2022-02-15 01:39:34,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:34,055 INFO L225 Difference]: With dead ends: 166 [2022-02-15 01:39:34,055 INFO L226 Difference]: Without dead ends: 156 [2022-02-15 01:39:34,056 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 299 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=154, Invalid=2498, Unknown=0, NotChecked=0, Total=2652 [2022-02-15 01:39:34,056 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 80 mSDsluCounter, 1203 mSDsCounter, 0 mSdLazyCounter, 2309 mSolverCounterSat, 48 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 1259 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 48 IncrementalHoareTripleChecker+Valid, 2309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:34,056 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 1259 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [48 Valid, 2309 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:39:34,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2022-02-15 01:39:34,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 152. [2022-02-15 01:39:34,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 148 states have (on average 1.0135135135135136) internal successors, (150), 148 states have internal predecessors, (150), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:34,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2022-02-15 01:39:34,079 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 145 [2022-02-15 01:39:34,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:34,079 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2022-02-15 01:39:34,079 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 5.2592592592592595) internal successors, (142), 26 states have internal predecessors, (142), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:34,079 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2022-02-15 01:39:34,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-02-15 01:39:34,083 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:34,083 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:34,083 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-02-15 01:39:34,084 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:34,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:34,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1586956518, now seen corresponding path program 23 times [2022-02-15 01:39:34,084 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:34,085 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1499171063] [2022-02-15 01:39:34,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:34,087 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:34,088 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:34,088 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:34,090 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:34,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:34,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:34,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:34,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:34,547 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:34,547 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1499171063] [2022-02-15 01:39:34,547 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1499171063] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:34,547 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:34,547 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-02-15 01:39:34,547 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95952177] [2022-02-15 01:39:34,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:34,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-02-15 01:39:34,547 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:34,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-02-15 01:39:34,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=703, Unknown=0, NotChecked=0, Total=756 [2022-02-15 01:39:34,548 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 27 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:35,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:35,930 INFO L93 Difference]: Finished difference Result 172 states and 175 transitions. [2022-02-15 01:39:35,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-02-15 01:39:35,931 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 27 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-02-15 01:39:35,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:35,932 INFO L225 Difference]: With dead ends: 172 [2022-02-15 01:39:35,932 INFO L226 Difference]: Without dead ends: 162 [2022-02-15 01:39:35,932 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=160, Invalid=2702, Unknown=0, NotChecked=0, Total=2862 [2022-02-15 01:39:35,933 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 83 mSDsluCounter, 1303 mSDsCounter, 0 mSdLazyCounter, 2505 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 1361 SdHoareTripleChecker+Invalid, 2555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 2505 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:35,933 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 1361 Invalid, 2555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 2505 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-02-15 01:39:35,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2022-02-15 01:39:35,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 158. [2022-02-15 01:39:35,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 154 states have (on average 1.0129870129870129) internal successors, (156), 154 states have internal predecessors, (156), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:35,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 159 transitions. [2022-02-15 01:39:35,958 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 159 transitions. Word has length 151 [2022-02-15 01:39:35,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:35,959 INFO L470 AbstractCegarLoop]: Abstraction has 158 states and 159 transitions. [2022-02-15 01:39:35,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 5.285714285714286) internal successors, (148), 27 states have internal predecessors, (148), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:35,959 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 159 transitions. [2022-02-15 01:39:35,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2022-02-15 01:39:35,959 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:35,959 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:35,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-02-15 01:39:35,960 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:35,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:35,960 INFO L85 PathProgramCache]: Analyzing trace with hash 1751317282, now seen corresponding path program 24 times [2022-02-15 01:39:35,960 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:35,960 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1624740081] [2022-02-15 01:39:35,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:35,962 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:35,962 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:35,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:35,964 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:36,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:36,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:36,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:36,414 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:36,415 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1624740081] [2022-02-15 01:39:36,415 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1624740081] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:36,415 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:36,415 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-02-15 01:39:36,415 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265808813] [2022-02-15 01:39:36,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:36,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-02-15 01:39:36,415 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:36,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-02-15 01:39:36,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=757, Unknown=0, NotChecked=0, Total=812 [2022-02-15 01:39:36,416 INFO L87 Difference]: Start difference. First operand 158 states and 159 transitions. Second operand has 29 states, 29 states have (on average 5.310344827586207) internal successors, (154), 28 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:37,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:37,897 INFO L93 Difference]: Finished difference Result 178 states and 181 transitions. [2022-02-15 01:39:37,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-02-15 01:39:37,897 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 5.310344827586207) internal successors, (154), 28 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 157 [2022-02-15 01:39:37,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:37,898 INFO L225 Difference]: With dead ends: 178 [2022-02-15 01:39:37,898 INFO L226 Difference]: Without dead ends: 168 [2022-02-15 01:39:37,899 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=166, Invalid=2914, Unknown=0, NotChecked=0, Total=3080 [2022-02-15 01:39:37,899 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 86 mSDsluCounter, 1407 mSDsCounter, 0 mSdLazyCounter, 2709 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 1467 SdHoareTripleChecker+Invalid, 2761 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 2709 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:37,899 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 1467 Invalid, 2761 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 2709 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:39:37,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-02-15 01:39:37,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2022-02-15 01:39:37,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 160 states have (on average 1.0125) internal successors, (162), 160 states have internal predecessors, (162), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:37,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2022-02-15 01:39:37,927 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 157 [2022-02-15 01:39:37,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:37,927 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2022-02-15 01:39:37,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 5.310344827586207) internal successors, (154), 28 states have internal predecessors, (154), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:37,927 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2022-02-15 01:39:37,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-02-15 01:39:37,928 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:37,928 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:37,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-02-15 01:39:37,928 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:37,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:37,928 INFO L85 PathProgramCache]: Analyzing trace with hash -872687318, now seen corresponding path program 25 times [2022-02-15 01:39:37,928 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:37,928 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400584276] [2022-02-15 01:39:37,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:37,930 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:37,930 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:37,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:37,933 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:37,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:38,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:38,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:38,494 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:38,494 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400584276] [2022-02-15 01:39:38,494 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [400584276] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:38,494 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:38,494 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-02-15 01:39:38,494 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786069008] [2022-02-15 01:39:38,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:38,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-02-15 01:39:38,496 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:38,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-02-15 01:39:38,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=813, Unknown=0, NotChecked=0, Total=870 [2022-02-15 01:39:38,497 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 30 states, 30 states have (on average 5.333333333333333) internal successors, (160), 29 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:40,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:40,042 INFO L93 Difference]: Finished difference Result 184 states and 187 transitions. [2022-02-15 01:39:40,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-02-15 01:39:40,043 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 5.333333333333333) internal successors, (160), 29 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-02-15 01:39:40,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:40,046 INFO L225 Difference]: With dead ends: 184 [2022-02-15 01:39:40,047 INFO L226 Difference]: Without dead ends: 174 [2022-02-15 01:39:40,047 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=172, Invalid=3134, Unknown=0, NotChecked=0, Total=3306 [2022-02-15 01:39:40,048 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 89 mSDsluCounter, 1515 mSDsCounter, 0 mSdLazyCounter, 2921 mSolverCounterSat, 54 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 1577 SdHoareTripleChecker+Invalid, 2975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 54 IncrementalHoareTripleChecker+Valid, 2921 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:40,049 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 1577 Invalid, 2975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [54 Valid, 2921 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-02-15 01:39:40,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-02-15 01:39:40,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 170. [2022-02-15 01:39:40,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 170 states, 166 states have (on average 1.0120481927710843) internal successors, (168), 166 states have internal predecessors, (168), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:40,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 170 states to 170 states and 171 transitions. [2022-02-15 01:39:40,080 INFO L78 Accepts]: Start accepts. Automaton has 170 states and 171 transitions. Word has length 163 [2022-02-15 01:39:40,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:40,080 INFO L470 AbstractCegarLoop]: Abstraction has 170 states and 171 transitions. [2022-02-15 01:39:40,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 5.333333333333333) internal successors, (160), 29 states have internal predecessors, (160), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:40,081 INFO L276 IsEmpty]: Start isEmpty. Operand 170 states and 171 transitions. [2022-02-15 01:39:40,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2022-02-15 01:39:40,081 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:40,081 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:40,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-02-15 01:39:40,081 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:40,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:40,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1814565170, now seen corresponding path program 26 times [2022-02-15 01:39:40,082 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:40,082 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [962630735] [2022-02-15 01:39:40,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:40,084 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:40,084 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:40,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:40,086 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:40,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:40,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:40,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:40,588 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:40,588 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [962630735] [2022-02-15 01:39:40,588 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [962630735] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:40,588 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:40,588 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-02-15 01:39:40,588 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308325370] [2022-02-15 01:39:40,588 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:40,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-02-15 01:39:40,589 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:40,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-02-15 01:39:40,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=871, Unknown=0, NotChecked=0, Total=930 [2022-02-15 01:39:40,590 INFO L87 Difference]: Start difference. First operand 170 states and 171 transitions. Second operand has 31 states, 31 states have (on average 5.354838709677419) internal successors, (166), 30 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:42,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:42,319 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2022-02-15 01:39:42,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-02-15 01:39:42,319 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 5.354838709677419) internal successors, (166), 30 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 169 [2022-02-15 01:39:42,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:42,320 INFO L225 Difference]: With dead ends: 190 [2022-02-15 01:39:42,320 INFO L226 Difference]: Without dead ends: 180 [2022-02-15 01:39:42,321 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 405 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=178, Invalid=3362, Unknown=0, NotChecked=0, Total=3540 [2022-02-15 01:39:42,321 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 92 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 3141 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1691 SdHoareTripleChecker+Invalid, 3197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 3141 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:42,321 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 1691 Invalid, 3197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 3141 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:39:42,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2022-02-15 01:39:42,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 176. [2022-02-15 01:39:42,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 172 states have (on average 1.0116279069767442) internal successors, (174), 172 states have internal predecessors, (174), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:42,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2022-02-15 01:39:42,353 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 169 [2022-02-15 01:39:42,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:42,353 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2022-02-15 01:39:42,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 5.354838709677419) internal successors, (166), 30 states have internal predecessors, (166), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:42,353 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2022-02-15 01:39:42,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-02-15 01:39:42,354 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:42,354 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:42,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-02-15 01:39:42,354 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:42,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:42,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1065100090, now seen corresponding path program 27 times [2022-02-15 01:39:42,354 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:42,354 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1858938990] [2022-02-15 01:39:42,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:42,356 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:42,356 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:42,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:42,359 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:42,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:42,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:42,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:42,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:42,868 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:42,868 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1858938990] [2022-02-15 01:39:42,868 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1858938990] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:42,868 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:42,868 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-02-15 01:39:42,868 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149965221] [2022-02-15 01:39:42,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:42,869 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-02-15 01:39:42,869 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:42,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-02-15 01:39:42,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=931, Unknown=0, NotChecked=0, Total=992 [2022-02-15 01:39:42,870 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 32 states, 32 states have (on average 5.375) internal successors, (172), 31 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:44,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:44,677 INFO L93 Difference]: Finished difference Result 196 states and 199 transitions. [2022-02-15 01:39:44,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-02-15 01:39:44,678 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 5.375) internal successors, (172), 31 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-02-15 01:39:44,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:44,679 INFO L225 Difference]: With dead ends: 196 [2022-02-15 01:39:44,679 INFO L226 Difference]: Without dead ends: 186 [2022-02-15 01:39:44,680 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 434 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=184, Invalid=3598, Unknown=0, NotChecked=0, Total=3782 [2022-02-15 01:39:44,680 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 95 mSDsluCounter, 1743 mSDsCounter, 0 mSdLazyCounter, 3369 mSolverCounterSat, 58 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 1809 SdHoareTripleChecker+Invalid, 3427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 58 IncrementalHoareTripleChecker+Valid, 3369 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:44,680 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 1809 Invalid, 3427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [58 Valid, 3369 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-02-15 01:39:44,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-02-15 01:39:44,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 182. [2022-02-15 01:39:44,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 178 states have (on average 1.0112359550561798) internal successors, (180), 178 states have internal predecessors, (180), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:44,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 183 transitions. [2022-02-15 01:39:44,715 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 183 transitions. Word has length 175 [2022-02-15 01:39:44,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:44,715 INFO L470 AbstractCegarLoop]: Abstraction has 182 states and 183 transitions. [2022-02-15 01:39:44,715 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 5.375) internal successors, (172), 31 states have internal predecessors, (172), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:44,715 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 183 transitions. [2022-02-15 01:39:44,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2022-02-15 01:39:44,716 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:44,716 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:44,716 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-02-15 01:39:44,716 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:44,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:44,717 INFO L85 PathProgramCache]: Analyzing trace with hash 455905090, now seen corresponding path program 28 times [2022-02-15 01:39:44,717 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:44,717 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [200009709] [2022-02-15 01:39:44,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:44,719 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:44,719 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:44,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:44,721 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:44,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:45,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:45,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:45,294 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:45,294 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [200009709] [2022-02-15 01:39:45,294 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [200009709] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:45,294 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:45,294 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-02-15 01:39:45,294 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323769414] [2022-02-15 01:39:45,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:45,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-02-15 01:39:45,294 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-02-15 01:39:45,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=993, Unknown=0, NotChecked=0, Total=1056 [2022-02-15 01:39:45,295 INFO L87 Difference]: Start difference. First operand 182 states and 183 transitions. Second operand has 33 states, 33 states have (on average 5.393939393939394) internal successors, (178), 32 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:47,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:47,157 INFO L93 Difference]: Finished difference Result 202 states and 205 transitions. [2022-02-15 01:39:47,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-02-15 01:39:47,157 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 5.393939393939394) internal successors, (178), 32 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 181 [2022-02-15 01:39:47,157 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:47,158 INFO L225 Difference]: With dead ends: 202 [2022-02-15 01:39:47,158 INFO L226 Difference]: Without dead ends: 192 [2022-02-15 01:39:47,159 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=190, Invalid=3842, Unknown=0, NotChecked=0, Total=4032 [2022-02-15 01:39:47,159 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 98 mSDsluCounter, 1863 mSDsCounter, 0 mSdLazyCounter, 3605 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 1931 SdHoareTripleChecker+Invalid, 3665 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 3605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:47,159 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 1931 Invalid, 3665 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 3605 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:39:47,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-02-15 01:39:47,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 188. [2022-02-15 01:39:47,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 184 states have (on average 1.0108695652173914) internal successors, (186), 184 states have internal predecessors, (186), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:47,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2022-02-15 01:39:47,195 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 181 [2022-02-15 01:39:47,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:47,195 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2022-02-15 01:39:47,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 5.393939393939394) internal successors, (178), 32 states have internal predecessors, (178), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:47,195 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2022-02-15 01:39:47,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-02-15 01:39:47,196 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:47,196 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:47,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-02-15 01:39:47,196 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:47,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:47,196 INFO L85 PathProgramCache]: Analyzing trace with hash 990762314, now seen corresponding path program 29 times [2022-02-15 01:39:47,196 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:47,196 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [450156911] [2022-02-15 01:39:47,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:47,198 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:47,198 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:47,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:47,201 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:47,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:47,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:47,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:47,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:47,772 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:47,772 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [450156911] [2022-02-15 01:39:47,772 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [450156911] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:47,772 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:47,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-02-15 01:39:47,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959427923] [2022-02-15 01:39:47,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-02-15 01:39:47,773 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:47,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-02-15 01:39:47,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=1057, Unknown=0, NotChecked=0, Total=1122 [2022-02-15 01:39:47,774 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 33 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:49,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:49,716 INFO L93 Difference]: Finished difference Result 208 states and 211 transitions. [2022-02-15 01:39:49,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-02-15 01:39:49,716 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 33 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-02-15 01:39:49,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:49,717 INFO L225 Difference]: With dead ends: 208 [2022-02-15 01:39:49,717 INFO L226 Difference]: Without dead ends: 198 [2022-02-15 01:39:49,718 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=4094, Unknown=0, NotChecked=0, Total=4290 [2022-02-15 01:39:49,719 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 101 mSDsluCounter, 1987 mSDsCounter, 0 mSdLazyCounter, 3849 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 2057 SdHoareTripleChecker+Invalid, 3911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 3849 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:49,719 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 2057 Invalid, 3911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [62 Valid, 3849 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-02-15 01:39:49,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2022-02-15 01:39:49,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 194. [2022-02-15 01:39:49,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 194 states, 190 states have (on average 1.0105263157894737) internal successors, (192), 190 states have internal predecessors, (192), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:49,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 195 transitions. [2022-02-15 01:39:49,756 INFO L78 Accepts]: Start accepts. Automaton has 194 states and 195 transitions. Word has length 187 [2022-02-15 01:39:49,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:49,757 INFO L470 AbstractCegarLoop]: Abstraction has 194 states and 195 transitions. [2022-02-15 01:39:49,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 5.411764705882353) internal successors, (184), 33 states have internal predecessors, (184), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:49,757 INFO L276 IsEmpty]: Start isEmpty. Operand 194 states and 195 transitions. [2022-02-15 01:39:49,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 194 [2022-02-15 01:39:49,757 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:49,758 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:49,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-02-15 01:39:49,758 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:49,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:49,758 INFO L85 PathProgramCache]: Analyzing trace with hash -913017518, now seen corresponding path program 30 times [2022-02-15 01:39:49,758 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:49,758 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [471927207] [2022-02-15 01:39:49,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:49,760 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:49,760 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:49,760 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:49,762 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:49,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:50,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:50,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:50,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:50,351 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:50,351 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [471927207] [2022-02-15 01:39:50,351 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [471927207] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:50,351 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:50,352 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-02-15 01:39:50,352 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298323297] [2022-02-15 01:39:50,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:50,352 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-02-15 01:39:50,352 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:50,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-02-15 01:39:50,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=1123, Unknown=0, NotChecked=0, Total=1190 [2022-02-15 01:39:50,353 INFO L87 Difference]: Start difference. First operand 194 states and 195 transitions. Second operand has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 34 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:52,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:52,468 INFO L93 Difference]: Finished difference Result 214 states and 217 transitions. [2022-02-15 01:39:52,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-02-15 01:39:52,468 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 34 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 193 [2022-02-15 01:39:52,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:52,469 INFO L225 Difference]: With dead ends: 214 [2022-02-15 01:39:52,469 INFO L226 Difference]: Without dead ends: 204 [2022-02-15 01:39:52,470 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 527 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=202, Invalid=4354, Unknown=0, NotChecked=0, Total=4556 [2022-02-15 01:39:52,470 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 104 mSDsluCounter, 2115 mSDsCounter, 0 mSdLazyCounter, 4101 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 2187 SdHoareTripleChecker+Invalid, 4165 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 4101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:52,471 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 2187 Invalid, 4165 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 4101 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-02-15 01:39:52,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2022-02-15 01:39:52,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2022-02-15 01:39:52,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 196 states have (on average 1.010204081632653) internal successors, (198), 196 states have internal predecessors, (198), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:52,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2022-02-15 01:39:52,518 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 193 [2022-02-15 01:39:52,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:52,519 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2022-02-15 01:39:52,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 5.428571428571429) internal successors, (190), 34 states have internal predecessors, (190), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:52,519 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2022-02-15 01:39:52,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-02-15 01:39:52,519 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:52,519 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:52,520 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-02-15 01:39:52,520 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:52,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:52,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1742008154, now seen corresponding path program 31 times [2022-02-15 01:39:52,520 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:52,520 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [920999116] [2022-02-15 01:39:52,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:52,522 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: 1 HavocedVariables, 8 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:52,522 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because NONLINEAR_UPDATE [2022-02-15 01:39:52,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:52,525 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:52,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:53,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:53,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:53,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:53,141 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:53,141 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [920999116] [2022-02-15 01:39:53,141 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [920999116] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:53,141 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:53,141 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-02-15 01:39:53,141 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579322399] [2022-02-15 01:39:53,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:53,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-02-15 01:39:53,141 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:53,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-02-15 01:39:53,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1191, Unknown=0, NotChecked=0, Total=1260 [2022-02-15 01:39:53,142 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 36 states, 36 states have (on average 5.444444444444445) internal successors, (196), 35 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:55,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:55,376 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2022-02-15 01:39:55,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-02-15 01:39:55,376 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 5.444444444444445) internal successors, (196), 35 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-02-15 01:39:55,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:55,377 INFO L225 Difference]: With dead ends: 220 [2022-02-15 01:39:55,377 INFO L226 Difference]: Without dead ends: 210 [2022-02-15 01:39:55,378 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 560 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=208, Invalid=4622, Unknown=0, NotChecked=0, Total=4830 [2022-02-15 01:39:55,379 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 107 mSDsluCounter, 2247 mSDsCounter, 0 mSdLazyCounter, 4361 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 107 SdHoareTripleChecker+Valid, 2321 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 4361 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:55,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [107 Valid, 2321 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 4361 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:39:55,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2022-02-15 01:39:55,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 206. [2022-02-15 01:39:55,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 202 states have (on average 1.00990099009901) internal successors, (204), 202 states have internal predecessors, (204), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 207 transitions. [2022-02-15 01:39:55,432 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 207 transitions. Word has length 199 [2022-02-15 01:39:55,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:55,432 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 207 transitions. [2022-02-15 01:39:55,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 5.444444444444445) internal successors, (196), 35 states have internal predecessors, (196), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:55,432 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 207 transitions. [2022-02-15 01:39:55,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2022-02-15 01:39:55,433 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:55,433 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:55,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-02-15 01:39:55,433 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:55,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:55,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1249655966, now seen corresponding path program 32 times [2022-02-15 01:39:55,433 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:55,433 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1776880289] [2022-02-15 01:39:55,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:55,436 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:55,437 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:55,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:55,439 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:55,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:56,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:56,120 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:56,120 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:56,120 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1776880289] [2022-02-15 01:39:56,120 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1776880289] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:56,120 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:56,120 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-02-15 01:39:56,121 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289512647] [2022-02-15 01:39:56,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:56,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-02-15 01:39:56,121 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:56,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-02-15 01:39:56,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1261, Unknown=0, NotChecked=0, Total=1332 [2022-02-15 01:39:56,122 INFO L87 Difference]: Start difference. First operand 206 states and 207 transitions. Second operand has 37 states, 37 states have (on average 5.45945945945946) internal successors, (202), 36 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:58,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:39:58,452 INFO L93 Difference]: Finished difference Result 226 states and 229 transitions. [2022-02-15 01:39:58,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-02-15 01:39:58,452 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 5.45945945945946) internal successors, (202), 36 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 205 [2022-02-15 01:39:58,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:39:58,455 INFO L225 Difference]: With dead ends: 226 [2022-02-15 01:39:58,455 INFO L226 Difference]: Without dead ends: 216 [2022-02-15 01:39:58,455 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 594 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=4898, Unknown=0, NotChecked=0, Total=5112 [2022-02-15 01:39:58,456 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 110 mSDsluCounter, 2383 mSDsCounter, 0 mSdLazyCounter, 4629 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 2459 SdHoareTripleChecker+Invalid, 4697 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 4629 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-02-15 01:39:58,456 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 2459 Invalid, 4697 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 4629 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-02-15 01:39:58,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2022-02-15 01:39:58,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 212. [2022-02-15 01:39:58,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 208 states have (on average 1.0096153846153846) internal successors, (210), 208 states have internal predecessors, (210), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:58,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2022-02-15 01:39:58,505 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 205 [2022-02-15 01:39:58,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:39:58,505 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2022-02-15 01:39:58,505 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 5.45945945945946) internal successors, (202), 36 states have internal predecessors, (202), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:39:58,505 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2022-02-15 01:39:58,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-02-15 01:39:58,506 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:39:58,506 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:39:58,506 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-02-15 01:39:58,506 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:39:58,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:39:58,506 INFO L85 PathProgramCache]: Analyzing trace with hash -655003286, now seen corresponding path program 33 times [2022-02-15 01:39:58,506 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:39:58,506 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [213129919] [2022-02-15 01:39:58,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:39:58,508 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:39:58,508 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:39:58,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:39:58,511 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:39:58,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:59,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:39:59,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:39:59,162 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:39:59,162 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:39:59,162 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [213129919] [2022-02-15 01:39:59,162 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [213129919] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:39:59,162 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:39:59,162 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-02-15 01:39:59,162 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913376254] [2022-02-15 01:39:59,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:39:59,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-02-15 01:39:59,162 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:39:59,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-02-15 01:39:59,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1333, Unknown=0, NotChecked=0, Total=1406 [2022-02-15 01:39:59,163 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 37 states have internal predecessors, (208), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:01,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:01,584 INFO L93 Difference]: Finished difference Result 232 states and 235 transitions. [2022-02-15 01:40:01,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-02-15 01:40:01,584 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 37 states have internal predecessors, (208), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-02-15 01:40:01,584 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:01,585 INFO L225 Difference]: With dead ends: 232 [2022-02-15 01:40:01,585 INFO L226 Difference]: Without dead ends: 222 [2022-02-15 01:40:01,586 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 629 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=5182, Unknown=0, NotChecked=0, Total=5402 [2022-02-15 01:40:01,586 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 113 mSDsluCounter, 2523 mSDsCounter, 0 mSdLazyCounter, 4905 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 2601 SdHoareTripleChecker+Invalid, 4975 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 4905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:01,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 2601 Invalid, 4975 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 4905 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:40:01,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2022-02-15 01:40:01,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 218. [2022-02-15 01:40:01,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 214 states have (on average 1.0093457943925233) internal successors, (216), 214 states have internal predecessors, (216), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 219 transitions. [2022-02-15 01:40:01,640 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 219 transitions. Word has length 211 [2022-02-15 01:40:01,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:01,641 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 219 transitions. [2022-02-15 01:40:01,641 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 5.473684210526316) internal successors, (208), 37 states have internal predecessors, (208), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:01,641 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 219 transitions. [2022-02-15 01:40:01,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 218 [2022-02-15 01:40:01,641 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:01,641 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:01,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-02-15 01:40:01,642 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:01,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:01,642 INFO L85 PathProgramCache]: Analyzing trace with hash 119437682, now seen corresponding path program 34 times [2022-02-15 01:40:01,642 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:01,642 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1720620373] [2022-02-15 01:40:01,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:01,644 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:01,644 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:01,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:01,646 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:01,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:02,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:02,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:02,353 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:02,353 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:02,353 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1720620373] [2022-02-15 01:40:02,353 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1720620373] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:02,353 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:02,353 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-02-15 01:40:02,353 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573709055] [2022-02-15 01:40:02,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:02,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-02-15 01:40:02,354 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:02,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-02-15 01:40:02,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1407, Unknown=0, NotChecked=0, Total=1482 [2022-02-15 01:40:02,355 INFO L87 Difference]: Start difference. First operand 218 states and 219 transitions. Second operand has 39 states, 39 states have (on average 5.487179487179487) internal successors, (214), 38 states have internal predecessors, (214), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:04,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:04,840 INFO L93 Difference]: Finished difference Result 238 states and 241 transitions. [2022-02-15 01:40:04,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-02-15 01:40:04,841 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.487179487179487) internal successors, (214), 38 states have internal predecessors, (214), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 217 [2022-02-15 01:40:04,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:04,841 INFO L225 Difference]: With dead ends: 238 [2022-02-15 01:40:04,841 INFO L226 Difference]: Without dead ends: 228 [2022-02-15 01:40:04,842 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=226, Invalid=5474, Unknown=0, NotChecked=0, Total=5700 [2022-02-15 01:40:04,843 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 116 mSDsluCounter, 2667 mSDsCounter, 0 mSdLazyCounter, 5189 mSolverCounterSat, 72 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 2747 SdHoareTripleChecker+Invalid, 5261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 72 IncrementalHoareTripleChecker+Valid, 5189 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:04,843 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 2747 Invalid, 5261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [72 Valid, 5189 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-02-15 01:40:04,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2022-02-15 01:40:04,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 224. [2022-02-15 01:40:04,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 220 states have (on average 1.009090909090909) internal successors, (222), 220 states have internal predecessors, (222), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 225 transitions. [2022-02-15 01:40:04,895 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 225 transitions. Word has length 217 [2022-02-15 01:40:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 225 transitions. [2022-02-15 01:40:04,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.487179487179487) internal successors, (214), 38 states have internal predecessors, (214), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 225 transitions. [2022-02-15 01:40:04,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-02-15 01:40:04,896 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:04,896 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:04,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-02-15 01:40:04,903 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:04,903 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:04,903 INFO L85 PathProgramCache]: Analyzing trace with hash 194206586, now seen corresponding path program 35 times [2022-02-15 01:40:04,903 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:04,903 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [552254752] [2022-02-15 01:40:04,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:04,906 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:04,906 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:04,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:04,909 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:04,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:05,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:05,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:05,619 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:05,619 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [552254752] [2022-02-15 01:40:05,619 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [552254752] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:05,619 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:05,619 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-02-15 01:40:05,619 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76605813] [2022-02-15 01:40:05,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:05,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-02-15 01:40:05,620 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:05,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-02-15 01:40:05,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1483, Unknown=0, NotChecked=0, Total=1560 [2022-02-15 01:40:05,620 INFO L87 Difference]: Start difference. First operand 224 states and 225 transitions. Second operand has 40 states, 40 states have (on average 5.5) internal successors, (220), 39 states have internal predecessors, (220), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:08,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:08,306 INFO L93 Difference]: Finished difference Result 244 states and 247 transitions. [2022-02-15 01:40:08,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-02-15 01:40:08,307 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 5.5) internal successors, (220), 39 states have internal predecessors, (220), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-02-15 01:40:08,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:08,307 INFO L225 Difference]: With dead ends: 244 [2022-02-15 01:40:08,307 INFO L226 Difference]: Without dead ends: 234 [2022-02-15 01:40:08,308 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 702 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=232, Invalid=5774, Unknown=0, NotChecked=0, Total=6006 [2022-02-15 01:40:08,309 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 119 mSDsluCounter, 2815 mSDsCounter, 0 mSdLazyCounter, 5481 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 2897 SdHoareTripleChecker+Invalid, 5555 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 5481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:08,309 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 2897 Invalid, 5555 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 5481 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-02-15 01:40:08,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2022-02-15 01:40:08,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 230. [2022-02-15 01:40:08,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 226 states have (on average 1.008849557522124) internal successors, (228), 226 states have internal predecessors, (228), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:08,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 231 transitions. [2022-02-15 01:40:08,368 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 231 transitions. Word has length 223 [2022-02-15 01:40:08,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:08,369 INFO L470 AbstractCegarLoop]: Abstraction has 230 states and 231 transitions. [2022-02-15 01:40:08,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 5.5) internal successors, (220), 39 states have internal predecessors, (220), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:08,369 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 231 transitions. [2022-02-15 01:40:08,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2022-02-15 01:40:08,369 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:08,369 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:08,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-02-15 01:40:08,370 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:08,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:08,370 INFO L85 PathProgramCache]: Analyzing trace with hash -796354686, now seen corresponding path program 36 times [2022-02-15 01:40:08,370 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:08,370 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [117263518] [2022-02-15 01:40:08,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:08,372 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:08,372 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:08,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:08,374 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:08,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:09,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:09,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:09,137 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:09,137 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [117263518] [2022-02-15 01:40:09,137 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [117263518] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:09,137 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:09,137 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-02-15 01:40:09,137 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825899740] [2022-02-15 01:40:09,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:09,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-02-15 01:40:09,137 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:09,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-02-15 01:40:09,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1561, Unknown=0, NotChecked=0, Total=1640 [2022-02-15 01:40:09,138 INFO L87 Difference]: Start difference. First operand 230 states and 231 transitions. Second operand has 41 states, 41 states have (on average 5.512195121951219) internal successors, (226), 40 states have internal predecessors, (226), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:12,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:12,049 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2022-02-15 01:40:12,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-02-15 01:40:12,055 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 5.512195121951219) internal successors, (226), 40 states have internal predecessors, (226), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 229 [2022-02-15 01:40:12,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:12,056 INFO L225 Difference]: With dead ends: 250 [2022-02-15 01:40:12,056 INFO L226 Difference]: Without dead ends: 240 [2022-02-15 01:40:12,057 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 740 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=238, Invalid=6082, Unknown=0, NotChecked=0, Total=6320 [2022-02-15 01:40:12,058 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 122 mSDsluCounter, 2967 mSDsCounter, 0 mSdLazyCounter, 5781 mSolverCounterSat, 76 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 3051 SdHoareTripleChecker+Invalid, 5857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 5781 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:12,058 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 3051 Invalid, 5857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 5781 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:40:12,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2022-02-15 01:40:12,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 236. [2022-02-15 01:40:12,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 232 states have (on average 1.0086206896551724) internal successors, (234), 232 states have internal predecessors, (234), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:12,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 237 transitions. [2022-02-15 01:40:12,121 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 237 transitions. Word has length 229 [2022-02-15 01:40:12,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:12,121 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 237 transitions. [2022-02-15 01:40:12,121 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 5.512195121951219) internal successors, (226), 40 states have internal predecessors, (226), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:12,121 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 237 transitions. [2022-02-15 01:40:12,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-02-15 01:40:12,122 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:12,122 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:12,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-02-15 01:40:12,122 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:12,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:12,123 INFO L85 PathProgramCache]: Analyzing trace with hash -422400630, now seen corresponding path program 37 times [2022-02-15 01:40:12,123 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:12,123 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421834067] [2022-02-15 01:40:12,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:12,125 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:12,125 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:12,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:12,127 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:12,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:12,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:12,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:12,903 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:12,903 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421834067] [2022-02-15 01:40:12,903 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421834067] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:12,903 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:12,903 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-02-15 01:40:12,903 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104240570] [2022-02-15 01:40:12,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:12,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-02-15 01:40:12,903 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:12,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-02-15 01:40:12,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1641, Unknown=0, NotChecked=0, Total=1722 [2022-02-15 01:40:12,904 INFO L87 Difference]: Start difference. First operand 236 states and 237 transitions. Second operand has 42 states, 42 states have (on average 5.523809523809524) internal successors, (232), 41 states have internal predecessors, (232), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:15,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:15,805 INFO L93 Difference]: Finished difference Result 256 states and 259 transitions. [2022-02-15 01:40:15,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-02-15 01:40:15,806 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 5.523809523809524) internal successors, (232), 41 states have internal predecessors, (232), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-02-15 01:40:15,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:15,806 INFO L225 Difference]: With dead ends: 256 [2022-02-15 01:40:15,806 INFO L226 Difference]: Without dead ends: 246 [2022-02-15 01:40:15,807 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 779 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=244, Invalid=6398, Unknown=0, NotChecked=0, Total=6642 [2022-02-15 01:40:15,808 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 125 mSDsluCounter, 3123 mSDsCounter, 0 mSdLazyCounter, 6089 mSolverCounterSat, 78 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 3209 SdHoareTripleChecker+Invalid, 6167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 78 IncrementalHoareTripleChecker+Valid, 6089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:15,810 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 3209 Invalid, 6167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [78 Valid, 6089 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-02-15 01:40:15,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2022-02-15 01:40:15,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 242. [2022-02-15 01:40:15,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 238 states have (on average 1.0084033613445378) internal successors, (240), 238 states have internal predecessors, (240), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:15,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 243 transitions. [2022-02-15 01:40:15,875 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 243 transitions. Word has length 235 [2022-02-15 01:40:15,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:15,875 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 243 transitions. [2022-02-15 01:40:15,875 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 5.523809523809524) internal successors, (232), 41 states have internal predecessors, (232), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:15,875 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 243 transitions. [2022-02-15 01:40:15,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 242 [2022-02-15 01:40:15,876 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:15,876 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:15,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-02-15 01:40:15,876 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:15,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:15,876 INFO L85 PathProgramCache]: Analyzing trace with hash 233184658, now seen corresponding path program 38 times [2022-02-15 01:40:15,876 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:15,876 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [682943791] [2022-02-15 01:40:15,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:15,881 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:15,881 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:15,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:15,883 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:15,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:16,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:16,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:16,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:16,702 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:16,702 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [682943791] [2022-02-15 01:40:16,702 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [682943791] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:16,702 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:16,702 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-02-15 01:40:16,702 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386533912] [2022-02-15 01:40:16,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:16,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-02-15 01:40:16,702 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-02-15 01:40:16,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1723, Unknown=0, NotChecked=0, Total=1806 [2022-02-15 01:40:16,703 INFO L87 Difference]: Start difference. First operand 242 states and 243 transitions. Second operand has 43 states, 43 states have (on average 5.534883720930233) internal successors, (238), 42 states have internal predecessors, (238), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:19,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:19,754 INFO L93 Difference]: Finished difference Result 262 states and 265 transitions. [2022-02-15 01:40:19,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-02-15 01:40:19,754 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 5.534883720930233) internal successors, (238), 42 states have internal predecessors, (238), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 241 [2022-02-15 01:40:19,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:19,755 INFO L225 Difference]: With dead ends: 262 [2022-02-15 01:40:19,755 INFO L226 Difference]: Without dead ends: 252 [2022-02-15 01:40:19,756 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 819 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=250, Invalid=6722, Unknown=0, NotChecked=0, Total=6972 [2022-02-15 01:40:19,756 INFO L933 BasicCegarLoop]: 88 mSDtfsCounter, 128 mSDsluCounter, 3283 mSDsCounter, 0 mSdLazyCounter, 6405 mSolverCounterSat, 80 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 3371 SdHoareTripleChecker+Invalid, 6485 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 80 IncrementalHoareTripleChecker+Valid, 6405 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:19,757 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 3371 Invalid, 6485 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [80 Valid, 6405 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-02-15 01:40:19,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-02-15 01:40:19,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 248. [2022-02-15 01:40:19,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 244 states have (on average 1.0081967213114753) internal successors, (246), 244 states have internal predecessors, (246), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 249 transitions. [2022-02-15 01:40:19,825 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 249 transitions. Word has length 241 [2022-02-15 01:40:19,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:19,825 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 249 transitions. [2022-02-15 01:40:19,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 5.534883720930233) internal successors, (238), 42 states have internal predecessors, (238), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:19,825 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 249 transitions. [2022-02-15 01:40:19,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-02-15 01:40:19,826 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:19,826 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:19,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-02-15 01:40:19,826 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:19,826 INFO L85 PathProgramCache]: Analyzing trace with hash -1143511142, now seen corresponding path program 39 times [2022-02-15 01:40:19,827 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:19,827 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [279037094] [2022-02-15 01:40:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:19,829 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:19,829 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:19,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:19,831 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:19,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:20,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:20,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:20,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:20,695 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:20,695 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [279037094] [2022-02-15 01:40:20,695 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [279037094] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:20,695 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:20,695 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-02-15 01:40:20,695 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803604678] [2022-02-15 01:40:20,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:20,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-02-15 01:40:20,695 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:20,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-02-15 01:40:20,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1807, Unknown=0, NotChecked=0, Total=1892 [2022-02-15 01:40:20,696 INFO L87 Difference]: Start difference. First operand 248 states and 249 transitions. Second operand has 44 states, 44 states have (on average 5.545454545454546) internal successors, (244), 43 states have internal predecessors, (244), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:24,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:24,098 INFO L93 Difference]: Finished difference Result 268 states and 271 transitions. [2022-02-15 01:40:24,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-02-15 01:40:24,098 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 5.545454545454546) internal successors, (244), 43 states have internal predecessors, (244), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-02-15 01:40:24,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:24,099 INFO L225 Difference]: With dead ends: 268 [2022-02-15 01:40:24,099 INFO L226 Difference]: Without dead ends: 258 [2022-02-15 01:40:24,099 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 860 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=256, Invalid=7054, Unknown=0, NotChecked=0, Total=7310 [2022-02-15 01:40:24,100 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 131 mSDsluCounter, 3447 mSDsCounter, 0 mSdLazyCounter, 6729 mSolverCounterSat, 82 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 3537 SdHoareTripleChecker+Invalid, 6811 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 82 IncrementalHoareTripleChecker+Valid, 6729 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:24,100 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [131 Valid, 3537 Invalid, 6811 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [82 Valid, 6729 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:40:24,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2022-02-15 01:40:24,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 254. [2022-02-15 01:40:24,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 250 states have (on average 1.008) internal successors, (252), 250 states have internal predecessors, (252), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:24,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 255 transitions. [2022-02-15 01:40:24,167 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 255 transitions. Word has length 247 [2022-02-15 01:40:24,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:24,167 INFO L470 AbstractCegarLoop]: Abstraction has 254 states and 255 transitions. [2022-02-15 01:40:24,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 5.545454545454546) internal successors, (244), 43 states have internal predecessors, (244), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 255 transitions. [2022-02-15 01:40:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 254 [2022-02-15 01:40:24,168 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:24,168 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:24,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-02-15 01:40:24,168 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:24,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:24,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1520759902, now seen corresponding path program 40 times [2022-02-15 01:40:24,169 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:24,169 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [322980027] [2022-02-15 01:40:24,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:24,171 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:24,171 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:24,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:24,173 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:24,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:25,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:25,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:25,103 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:25,103 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [322980027] [2022-02-15 01:40:25,103 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [322980027] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:25,103 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:25,103 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-02-15 01:40:25,103 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390597235] [2022-02-15 01:40:25,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:25,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-02-15 01:40:25,103 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:25,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-02-15 01:40:25,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1893, Unknown=0, NotChecked=0, Total=1980 [2022-02-15 01:40:25,104 INFO L87 Difference]: Start difference. First operand 254 states and 255 transitions. Second operand has 45 states, 45 states have (on average 5.555555555555555) internal successors, (250), 44 states have internal predecessors, (250), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:28,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:28,437 INFO L93 Difference]: Finished difference Result 274 states and 277 transitions. [2022-02-15 01:40:28,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-02-15 01:40:28,438 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 5.555555555555555) internal successors, (250), 44 states have internal predecessors, (250), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 253 [2022-02-15 01:40:28,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:28,439 INFO L225 Difference]: With dead ends: 274 [2022-02-15 01:40:28,439 INFO L226 Difference]: Without dead ends: 264 [2022-02-15 01:40:28,440 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 902 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=262, Invalid=7394, Unknown=0, NotChecked=0, Total=7656 [2022-02-15 01:40:28,440 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 134 mSDsluCounter, 3615 mSDsCounter, 0 mSdLazyCounter, 7061 mSolverCounterSat, 84 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 3707 SdHoareTripleChecker+Invalid, 7145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 84 IncrementalHoareTripleChecker+Valid, 7061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:28,440 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 3707 Invalid, 7145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [84 Valid, 7061 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-02-15 01:40:28,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2022-02-15 01:40:28,521 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2022-02-15 01:40:28,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 256 states have (on average 1.0078125) internal successors, (258), 256 states have internal predecessors, (258), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:28,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 261 transitions. [2022-02-15 01:40:28,522 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 261 transitions. Word has length 253 [2022-02-15 01:40:28,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:28,523 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 261 transitions. [2022-02-15 01:40:28,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 5.555555555555555) internal successors, (250), 44 states have internal predecessors, (250), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:28,523 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 261 transitions. [2022-02-15 01:40:28,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-02-15 01:40:28,524 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:28,524 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:28,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-02-15 01:40:28,524 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:28,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:28,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1170573738, now seen corresponding path program 41 times [2022-02-15 01:40:28,524 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:28,524 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [11408838] [2022-02-15 01:40:28,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:28,527 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:28,527 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:28,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:28,529 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:28,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:29,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:29,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:29,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:29,440 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:29,441 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [11408838] [2022-02-15 01:40:29,441 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [11408838] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:29,441 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:29,441 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-02-15 01:40:29,441 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159586665] [2022-02-15 01:40:29,441 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:29,442 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-02-15 01:40:29,443 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:29,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-02-15 01:40:29,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1981, Unknown=0, NotChecked=0, Total=2070 [2022-02-15 01:40:29,443 INFO L87 Difference]: Start difference. First operand 260 states and 261 transitions. Second operand has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 45 states have internal predecessors, (256), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:32,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:32,911 INFO L93 Difference]: Finished difference Result 280 states and 283 transitions. [2022-02-15 01:40:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:40:32,911 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 45 states have internal predecessors, (256), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-02-15 01:40:32,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:32,916 INFO L225 Difference]: With dead ends: 280 [2022-02-15 01:40:32,916 INFO L226 Difference]: Without dead ends: 270 [2022-02-15 01:40:32,916 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=268, Invalid=7742, Unknown=0, NotChecked=0, Total=8010 [2022-02-15 01:40:32,922 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 137 mSDsluCounter, 3787 mSDsCounter, 0 mSdLazyCounter, 7401 mSolverCounterSat, 86 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 3881 SdHoareTripleChecker+Invalid, 7487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 86 IncrementalHoareTripleChecker+Valid, 7401 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:32,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 3881 Invalid, 7487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [86 Valid, 7401 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-02-15 01:40:32,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 270 states. [2022-02-15 01:40:32,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 270 to 266. [2022-02-15 01:40:32,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 262 states have (on average 1.0076335877862594) internal successors, (264), 262 states have internal predecessors, (264), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:32,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 267 transitions. [2022-02-15 01:40:32,997 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 267 transitions. Word has length 259 [2022-02-15 01:40:32,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:32,998 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 267 transitions. [2022-02-15 01:40:32,998 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 5.565217391304348) internal successors, (256), 45 states have internal predecessors, (256), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:32,998 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 267 transitions. [2022-02-15 01:40:32,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2022-02-15 01:40:32,998 INFO L506 BasicCegarLoop]: Found error trace [2022-02-15 01:40:32,999 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-02-15 01:40:32,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-02-15 01:40:32,999 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting mainErr0ASSERT_VIOLATIONERROR_FUNCTION === [mainErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-02-15 01:40:32,999 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-02-15 01:40:32,999 INFO L85 PathProgramCache]: Analyzing trace with hash 1728799154, now seen corresponding path program 42 times [2022-02-15 01:40:32,999 INFO L126 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-02-15 01:40:32,999 INFO L338 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1195508335] [2022-02-15 01:40:32,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-02-15 01:40:33,001 INFO L89 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-02-15 01:40:33,001 WARN L91 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-02-15 01:40:33,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-02-15 01:40:33,004 INFO L274 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-02-15 01:40:33,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:34,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-02-15 01:40:34,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-02-15 01:40:34,773 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-02-15 01:40:34,773 INFO L144 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-02-15 01:40:34,773 INFO L338 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1195508335] [2022-02-15 01:40:34,773 INFO L165 FreeRefinementEngine]: IpTcStrategyModulePreferences [1195508335] provided 1 perfect and 0 imperfect interpolant sequences [2022-02-15 01:40:34,773 INFO L191 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-02-15 01:40:34,773 INFO L204 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-02-15 01:40:34,773 INFO L118 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250705643] [2022-02-15 01:40:34,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-02-15 01:40:34,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-02-15 01:40:34,774 INFO L108 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-02-15 01:40:34,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-02-15 01:40:34,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=2162, Unknown=0, NotChecked=0, Total=2256 [2022-02-15 01:40:34,775 INFO L87 Difference]: Start difference. First operand 266 states and 267 transitions. Second operand has 48 states, 48 states have (on average 5.458333333333333) internal successors, (262), 47 states have internal predecessors, (262), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:37,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-02-15 01:40:37,523 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2022-02-15 01:40:37,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-02-15 01:40:37,523 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 5.458333333333333) internal successors, (262), 47 states have internal predecessors, (262), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 265 [2022-02-15 01:40:37,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-02-15 01:40:37,523 INFO L225 Difference]: With dead ends: 269 [2022-02-15 01:40:37,523 INFO L226 Difference]: Without dead ends: 0 [2022-02-15 01:40:37,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=110, Invalid=2440, Unknown=0, NotChecked=0, Total=2550 [2022-02-15 01:40:37,524 INFO L933 BasicCegarLoop]: 132 mSDtfsCounter, 12 mSDsluCounter, 5511 mSDsCounter, 0 mSdLazyCounter, 5963 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 5643 SdHoareTripleChecker+Invalid, 5965 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 5963 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-02-15 01:40:37,524 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [12 Valid, 5643 Invalid, 5965 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 5963 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-02-15 01:40:37,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2022-02-15 01:40:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2022-02-15 01:40:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-02-15 01:40:37,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2022-02-15 01:40:37,525 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 265 [2022-02-15 01:40:37,525 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-02-15 01:40:37,525 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2022-02-15 01:40:37,525 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 5.458333333333333) internal successors, (262), 47 states have internal predecessors, (262), 1 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-02-15 01:40:37,525 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2022-02-15 01:40:37,525 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2022-02-15 01:40:37,533 INFO L764 garLoopResultBuilder]: Registering result SAFE for location mainErr0ASSERT_VIOLATIONERROR_FUNCTION (0 of 1 remaining) [2022-02-15 01:40:37,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-02-15 01:40:37,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions.