/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/array-industry-pattern/array_of_struct_single_elem_init.i -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 18:20:06,433 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 18:20:06,435 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 18:20:06,501 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 18:20:06,548 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 18:20:06,548 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 18:20:06,549 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 18:20:06,552 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/acceleratedInterpolation/acceleratedInterpolationJordan_32.epf [2022-01-31 18:20:06,562 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 18:20:06,562 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 18:20:06,564 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 18:20:06,564 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 18:20:06,564 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 18:20:06,564 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 18:20:06,564 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 18:20:06,564 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 18:20:06,565 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 18:20:06,565 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 18:20:06,565 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 18:20:06,566 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 18:20:06,566 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 18:20:06,566 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 18:20:06,566 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 18:20:06,566 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 18:20:06,567 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 18:20:06,567 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 18:20:06,567 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:20:06,567 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 18:20:06,567 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 18:20:06,567 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 18:20:06,567 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 18:20:06,568 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 18:20:06,786 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 18:20:06,805 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 18:20:06,807 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 18:20:06,808 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 18:20:06,809 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 18:20:06,810 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i [2022-01-31 18:20:06,865 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afb17918/0fbd7bef7d794830b7edc01202236db9/FLAGce4c761d9 [2022-01-31 18:20:07,250 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 18:20:07,251 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i [2022-01-31 18:20:07,260 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afb17918/0fbd7bef7d794830b7edc01202236db9/FLAGce4c761d9 [2022-01-31 18:20:07,274 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7afb17918/0fbd7bef7d794830b7edc01202236db9 [2022-01-31 18:20:07,276 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 18:20:07,279 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 18:20:07,283 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 18:20:07,283 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 18:20:07,285 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 18:20:07,286 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:20:07" (1/1) ... [2022-01-31 18:20:07,287 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@576fb2c5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:07, skipping insertion in model container [2022-01-31 18:20:07,287 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 06:20:07" (1/1) ... [2022-01-31 18:20:07,292 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 18:20:07,304 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 18:20:07,493 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2022-01-31 18:20:07,509 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:20:08,850 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 18:20:08,858 WARN L230 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/trunk/examples/svcomp/array-industry-pattern/array_of_struct_single_elem_init.i[865,878] [2022-01-31 18:20:08,864 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 18:20:08,914 INFO L208 MainTranslator]: Completed translation [2022-01-31 18:20:08,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08 WrapperNode [2022-01-31 18:20:08,914 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 18:20:08,916 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 18:20:08,916 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 18:20:08,916 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 18:20:08,927 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,928 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,942 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,942 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,954 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,956 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,957 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,959 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 18:20:08,959 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 18:20:08,960 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 18:20:08,960 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 18:20:08,962 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (1/1) ... [2022-01-31 18:20:08,968 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 18:20:08,976 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 18:20:08,988 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) [2022-01-31 18:20:09,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 18:20:09,023 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 18:20:09,024 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 18:20:09,024 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 18:20:09,024 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 18:20:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 18:20:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 18:20:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_perror_fail [2022-01-31 18:20:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure __assert [2022-01-31 18:20:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 18:20:09,024 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 18:20:09,025 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 18:20:09,032 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 [2022-01-31 18:20:09,103 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 18:20:09,104 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 18:20:09,294 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 18:20:09,313 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 18:20:09,313 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 18:20:09,315 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:20:09 BoogieIcfgContainer [2022-01-31 18:20:09,315 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 18:20:09,316 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 18:20:09,316 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 18:20:09,319 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 18:20:09,319 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 06:20:07" (1/3) ... [2022-01-31 18:20:09,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e11131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:20:09, skipping insertion in model container [2022-01-31 18:20:09,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 06:20:08" (2/3) ... [2022-01-31 18:20:09,320 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73e11131 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 06:20:09, skipping insertion in model container [2022-01-31 18:20:09,320 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 06:20:09" (3/3) ... [2022-01-31 18:20:09,321 INFO L111 eAbstractionObserver]: Analyzing ICFG array_of_struct_single_elem_init.i [2022-01-31 18:20:09,325 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 18:20:09,325 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 18:20:09,389 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 18:20:09,396 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 [2022-01-31 18:20:09,396 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 18:20:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2022-01-31 18:20:09,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 18:20:09,416 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:09,417 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:09,417 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:09,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:09,423 INFO L85 PathProgramCache]: Analyzing trace with hash 1771181604, now seen corresponding path program 1 times [2022-01-31 18:20:09,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:09,431 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1079041854] [2022-01-31 18:20:09,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:09,443 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:09,489 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:09,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:09,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:09,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:09,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:09,656 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:09,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1079041854] [2022-01-31 18:20:09,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1079041854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:09,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:09,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 18:20:09,660 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984396167] [2022-01-31 18:20:09,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:09,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 18:20:09,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:09,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 18:20:09,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:20:09,692 INFO L87 Difference]: Start difference. First operand has 28 states, 20 states have (on average 1.45) internal successors, (29), 21 states have internal predecessors, (29), 3 states have call successors, (3), 3 states have call predecessors, (3), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:09,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:09,749 INFO L93 Difference]: Finished difference Result 48 states and 62 transitions. [2022-01-31 18:20:09,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 18:20:09,751 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 18:20:09,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:09,755 INFO L225 Difference]: With dead ends: 48 [2022-01-31 18:20:09,756 INFO L226 Difference]: Without dead ends: 25 [2022-01-31 18:20:09,758 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 18:20:09,760 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 7 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:09,761 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [7 Valid, 33 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:20:09,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2022-01-31 18:20:09,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 23. [2022-01-31 18:20:09,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:09,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2022-01-31 18:20:09,788 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 15 [2022-01-31 18:20:09,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:09,788 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2022-01-31 18:20:09,788 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 2 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:09,788 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2022-01-31 18:20:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2022-01-31 18:20:09,789 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:09,789 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:09,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 18:20:09,789 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:09,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:09,790 INFO L85 PathProgramCache]: Analyzing trace with hash -501714153, now seen corresponding path program 1 times [2022-01-31 18:20:09,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:09,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [580291479] [2022-01-31 18:20:09,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:09,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:09,793 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:09,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:09,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:09,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:09,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:09,846 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:09,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [580291479] [2022-01-31 18:20:09,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [580291479] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:09,847 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:09,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-01-31 18:20:09,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793950993] [2022-01-31 18:20:09,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:09,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-01-31 18:20:09,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:09,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-01-31 18:20:09,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-01-31 18:20:09,849 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:09,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:09,908 INFO L93 Difference]: Finished difference Result 46 states and 57 transitions. [2022-01-31 18:20:09,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 18:20:09,909 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 15 [2022-01-31 18:20:09,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:09,910 INFO L225 Difference]: With dead ends: 46 [2022-01-31 18:20:09,911 INFO L226 Difference]: Without dead ends: 33 [2022-01-31 18:20:09,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:20:09,912 INFO L933 BasicCegarLoop]: 22 mSDtfsCounter, 15 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 16 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:09,913 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [16 Valid, 36 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 18:20:09,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2022-01-31 18:20:09,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 24. [2022-01-31 18:20:09,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:09,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2022-01-31 18:20:09,921 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 15 [2022-01-31 18:20:09,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:09,922 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2022-01-31 18:20:09,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 3 states have internal predecessors, (11), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:09,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2022-01-31 18:20:09,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2022-01-31 18:20:09,924 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:09,924 INFO L514 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:09,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 18:20:09,925 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:09,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:09,929 INFO L85 PathProgramCache]: Analyzing trace with hash 792367698, now seen corresponding path program 1 times [2022-01-31 18:20:09,933 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:09,934 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [538938520] [2022-01-31 18:20:09,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:09,956 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:09,957 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:09,957 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:09,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:09,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:10,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,033 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:10,033 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:10,033 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [538938520] [2022-01-31 18:20:10,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [538938520] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:10,033 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:10,033 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-01-31 18:20:10,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807624507] [2022-01-31 18:20:10,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:10,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-01-31 18:20:10,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:10,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-01-31 18:20:10,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2022-01-31 18:20:10,035 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:10,143 INFO L93 Difference]: Finished difference Result 56 states and 71 transitions. [2022-01-31 18:20:10,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-01-31 18:20:10,144 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2022-01-31 18:20:10,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:10,144 INFO L225 Difference]: With dead ends: 56 [2022-01-31 18:20:10,145 INFO L226 Difference]: Without dead ends: 43 [2022-01-31 18:20:10,145 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:20:10,147 INFO L933 BasicCegarLoop]: 23 mSDtfsCounter, 32 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:10,147 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [34 Valid, 44 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:10,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2022-01-31 18:20:10,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2022-01-31 18:20:10,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 33 transitions. [2022-01-31 18:20:10,153 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 33 transitions. Word has length 19 [2022-01-31 18:20:10,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:10,153 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 33 transitions. [2022-01-31 18:20:10,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 4 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 33 transitions. [2022-01-31 18:20:10,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2022-01-31 18:20:10,154 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:10,154 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:10,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 18:20:10,155 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:10,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:10,155 INFO L85 PathProgramCache]: Analyzing trace with hash -747332595, now seen corresponding path program 2 times [2022-01-31 18:20:10,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:10,155 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930574987] [2022-01-31 18:20:10,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:10,162 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:10,163 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:10,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:10,164 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:10,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:10,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,254 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:10,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:10,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930574987] [2022-01-31 18:20:10,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930574987] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:10,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:10,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 18:20:10,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128163863] [2022-01-31 18:20:10,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:10,256 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 18:20:10,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:10,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 18:20:10,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2022-01-31 18:20:10,257 INFO L87 Difference]: Start difference. First operand 28 states and 33 transitions. Second operand has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:10,337 INFO L93 Difference]: Finished difference Result 66 states and 85 transitions. [2022-01-31 18:20:10,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-01-31 18:20:10,337 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 23 [2022-01-31 18:20:10,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:10,338 INFO L225 Difference]: With dead ends: 66 [2022-01-31 18:20:10,339 INFO L226 Difference]: Without dead ends: 53 [2022-01-31 18:20:10,339 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:20:10,340 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 58 SdHoareTripleChecker+Invalid, 72 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:10,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 58 Invalid, 72 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2022-01-31 18:20:10,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 32. [2022-01-31 18:20:10,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 26 states have (on average 1.2692307692307692) internal successors, (33), 26 states have internal predecessors, (33), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:10,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 38 transitions. [2022-01-31 18:20:10,347 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 38 transitions. Word has length 23 [2022-01-31 18:20:10,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:10,348 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 38 transitions. [2022-01-31 18:20:10,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.1666666666666665) internal successors, (19), 5 states have internal predecessors, (19), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,348 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 38 transitions. [2022-01-31 18:20:10,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2022-01-31 18:20:10,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:10,349 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:10,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 18:20:10,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:10,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:10,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1405964360, now seen corresponding path program 3 times [2022-01-31 18:20:10,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:10,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1452604491] [2022-01-31 18:20:10,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:10,357 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:10,357 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:10,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:10,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:10,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:10,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:10,557 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:10,557 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1452604491] [2022-01-31 18:20:10,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1452604491] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:10,558 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:10,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-01-31 18:20:10,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990966545] [2022-01-31 18:20:10,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:10,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-01-31 18:20:10,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:10,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-01-31 18:20:10,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2022-01-31 18:20:10,559 INFO L87 Difference]: Start difference. First operand 32 states and 38 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:10,668 INFO L93 Difference]: Finished difference Result 76 states and 99 transitions. [2022-01-31 18:20:10,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 18:20:10,669 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 27 [2022-01-31 18:20:10,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:10,670 INFO L225 Difference]: With dead ends: 76 [2022-01-31 18:20:10,670 INFO L226 Difference]: Without dead ends: 63 [2022-01-31 18:20:10,671 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:20:10,672 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 59 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 65 SdHoareTripleChecker+Invalid, 82 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:10,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 65 Invalid, 82 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:10,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2022-01-31 18:20:10,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 36. [2022-01-31 18:20:10,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 30 states have (on average 1.2666666666666666) internal successors, (38), 30 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:10,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 43 transitions. [2022-01-31 18:20:10,681 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 43 transitions. Word has length 27 [2022-01-31 18:20:10,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:10,681 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 43 transitions. [2022-01-31 18:20:10,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 6 states have internal predecessors, (23), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,681 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 43 transitions. [2022-01-31 18:20:10,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2022-01-31 18:20:10,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:10,682 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:10,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 18:20:10,683 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:10,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:10,683 INFO L85 PathProgramCache]: Analyzing trace with hash -739545341, now seen corresponding path program 4 times [2022-01-31 18:20:10,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:10,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [78286137] [2022-01-31 18:20:10,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:10,690 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:10,691 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:10,691 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:10,692 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:10,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:10,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:10,800 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:10,800 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:10,800 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [78286137] [2022-01-31 18:20:10,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [78286137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:10,801 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:10,801 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 18:20:10,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [592353502] [2022-01-31 18:20:10,801 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:10,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 18:20:10,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:10,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 18:20:10,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2022-01-31 18:20:10,803 INFO L87 Difference]: Start difference. First operand 36 states and 43 transitions. Second operand has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:10,904 INFO L93 Difference]: Finished difference Result 86 states and 113 transitions. [2022-01-31 18:20:10,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-01-31 18:20:10,904 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 31 [2022-01-31 18:20:10,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:10,906 INFO L225 Difference]: With dead ends: 86 [2022-01-31 18:20:10,906 INFO L226 Difference]: Without dead ends: 73 [2022-01-31 18:20:10,906 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:20:10,907 INFO L933 BasicCegarLoop]: 26 mSDtfsCounter, 75 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 96 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:10,908 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 74 Invalid, 96 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:10,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2022-01-31 18:20:10,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 40. [2022-01-31 18:20:10,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 34 states have (on average 1.2647058823529411) internal successors, (43), 34 states have internal predecessors, (43), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:10,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 48 transitions. [2022-01-31 18:20:10,916 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 48 transitions. Word has length 31 [2022-01-31 18:20:10,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:10,916 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 48 transitions. [2022-01-31 18:20:10,916 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.375) internal successors, (27), 7 states have internal predecessors, (27), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:10,916 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 48 transitions. [2022-01-31 18:20:10,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2022-01-31 18:20:10,917 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:10,917 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:10,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 18:20:10,918 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:10,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:10,918 INFO L85 PathProgramCache]: Analyzing trace with hash -971655106, now seen corresponding path program 5 times [2022-01-31 18:20:10,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:10,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1896232672] [2022-01-31 18:20:10,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:10,925 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:10,925 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:10,925 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:10,926 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:10,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:11,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:11,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:11,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:11,039 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1896232672] [2022-01-31 18:20:11,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1896232672] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:11,039 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:11,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2022-01-31 18:20:11,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095568110] [2022-01-31 18:20:11,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:11,040 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2022-01-31 18:20:11,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:11,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2022-01-31 18:20:11,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2022-01-31 18:20:11,042 INFO L87 Difference]: Start difference. First operand 40 states and 48 transitions. Second operand has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:11,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:11,171 INFO L93 Difference]: Finished difference Result 96 states and 127 transitions. [2022-01-31 18:20:11,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-01-31 18:20:11,173 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 35 [2022-01-31 18:20:11,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:11,175 INFO L225 Difference]: With dead ends: 96 [2022-01-31 18:20:11,175 INFO L226 Difference]: Without dead ends: 83 [2022-01-31 18:20:11,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:20:11,181 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 131 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 118 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:11,182 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [137 Valid, 82 Invalid, 118 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:11,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2022-01-31 18:20:11,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 44. [2022-01-31 18:20:11,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 states have internal predecessors, (48), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:11,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 53 transitions. [2022-01-31 18:20:11,191 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 53 transitions. Word has length 35 [2022-01-31 18:20:11,191 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:11,191 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 53 transitions. [2022-01-31 18:20:11,192 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.4444444444444446) internal successors, (31), 8 states have internal predecessors, (31), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:11,192 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 53 transitions. [2022-01-31 18:20:11,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2022-01-31 18:20:11,193 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:11,193 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:11,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 18:20:11,193 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:11,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:11,194 INFO L85 PathProgramCache]: Analyzing trace with hash -1691161607, now seen corresponding path program 6 times [2022-01-31 18:20:11,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:11,194 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [664516910] [2022-01-31 18:20:11,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:11,205 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:11,206 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:11,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:11,208 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:11,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:11,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:11,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:11,347 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:11,347 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:11,348 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [664516910] [2022-01-31 18:20:11,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [664516910] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:11,348 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:11,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 18:20:11,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259211349] [2022-01-31 18:20:11,348 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:11,349 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 18:20:11,349 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:11,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 18:20:11,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2022-01-31 18:20:11,350 INFO L87 Difference]: Start difference. First operand 44 states and 53 transitions. Second operand has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:11,489 INFO L93 Difference]: Finished difference Result 106 states and 141 transitions. [2022-01-31 18:20:11,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 18:20:11,490 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2022-01-31 18:20:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:11,492 INFO L225 Difference]: With dead ends: 106 [2022-01-31 18:20:11,492 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 18:20:11,492 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:20:11,495 INFO L933 BasicCegarLoop]: 28 mSDtfsCounter, 108 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 96 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:11,498 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 96 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:11,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 18:20:11,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 48. [2022-01-31 18:20:11,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 42 states have (on average 1.2619047619047619) internal successors, (53), 42 states have internal predecessors, (53), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 58 transitions. [2022-01-31 18:20:11,513 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 58 transitions. Word has length 39 [2022-01-31 18:20:11,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:11,513 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 58 transitions. [2022-01-31 18:20:11,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:11,513 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 58 transitions. [2022-01-31 18:20:11,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2022-01-31 18:20:11,514 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:11,514 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:11,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 18:20:11,515 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:11,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:11,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1925827124, now seen corresponding path program 7 times [2022-01-31 18:20:11,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:11,515 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194303370] [2022-01-31 18:20:11,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:11,524 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:11,524 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:11,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:11,526 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:11,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:11,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:11,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:11,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:11,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194303370] [2022-01-31 18:20:11,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194303370] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:11,704 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:11,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2022-01-31 18:20:11,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133686163] [2022-01-31 18:20:11,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:11,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2022-01-31 18:20:11,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:11,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2022-01-31 18:20:11,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=63, Unknown=0, NotChecked=0, Total=110 [2022-01-31 18:20:11,706 INFO L87 Difference]: Start difference. First operand 48 states and 58 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:11,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:11,848 INFO L93 Difference]: Finished difference Result 116 states and 155 transitions. [2022-01-31 18:20:11,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2022-01-31 18:20:11,850 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 43 [2022-01-31 18:20:11,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:11,852 INFO L225 Difference]: With dead ends: 116 [2022-01-31 18:20:11,855 INFO L226 Difference]: Without dead ends: 103 [2022-01-31 18:20:11,855 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=74, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:20:11,857 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 136 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 110 mSolverCounterSat, 39 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 149 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 39 IncrementalHoareTripleChecker+Valid, 110 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:11,857 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 105 Invalid, 149 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [39 Valid, 110 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:11,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2022-01-31 18:20:11,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 52. [2022-01-31 18:20:11,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:11,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 63 transitions. [2022-01-31 18:20:11,868 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 63 transitions. Word has length 43 [2022-01-31 18:20:11,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:11,869 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 63 transitions. [2022-01-31 18:20:11,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 10 states have internal predecessors, (39), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:11,870 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 63 transitions. [2022-01-31 18:20:11,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2022-01-31 18:20:11,873 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:11,873 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:11,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 18:20:11,874 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:11,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:11,874 INFO L85 PathProgramCache]: Analyzing trace with hash -889122065, now seen corresponding path program 8 times [2022-01-31 18:20:11,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:11,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [242460009] [2022-01-31 18:20:11,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:11,884 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:11,884 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:11,885 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:11,886 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:11,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:12,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:12,037 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:12,037 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [242460009] [2022-01-31 18:20:12,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [242460009] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:12,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:12,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 18:20:12,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431811897] [2022-01-31 18:20:12,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:12,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 18:20:12,038 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:12,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 18:20:12,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=75, Unknown=0, NotChecked=0, Total=132 [2022-01-31 18:20:12,039 INFO L87 Difference]: Start difference. First operand 52 states and 63 transitions. Second operand has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:12,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:12,196 INFO L93 Difference]: Finished difference Result 126 states and 169 transitions. [2022-01-31 18:20:12,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2022-01-31 18:20:12,197 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 47 [2022-01-31 18:20:12,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:12,198 INFO L225 Difference]: With dead ends: 126 [2022-01-31 18:20:12,198 INFO L226 Difference]: Without dead ends: 113 [2022-01-31 18:20:12,199 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=69, Invalid=87, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:20:12,199 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 142 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 115 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 115 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:12,200 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 112 Invalid, 152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 115 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:12,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2022-01-31 18:20:12,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 56. [2022-01-31 18:20:12,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 50 states have (on average 1.26) internal successors, (63), 50 states have internal predecessors, (63), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:12,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 68 transitions. [2022-01-31 18:20:12,219 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 68 transitions. Word has length 47 [2022-01-31 18:20:12,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:12,221 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 68 transitions. [2022-01-31 18:20:12,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.5833333333333335) internal successors, (43), 11 states have internal predecessors, (43), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:12,221 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 68 transitions. [2022-01-31 18:20:12,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2022-01-31 18:20:12,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:12,222 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:12,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 18:20:12,223 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:12,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:12,224 INFO L85 PathProgramCache]: Analyzing trace with hash 815760938, now seen corresponding path program 9 times [2022-01-31 18:20:12,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:12,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [139318270] [2022-01-31 18:20:12,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:12,234 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:12,234 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:12,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:12,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:12,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:12,393 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:12,393 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [139318270] [2022-01-31 18:20:12,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [139318270] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:12,393 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:12,393 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [] total 13 [2022-01-31 18:20:12,393 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525894618] [2022-01-31 18:20:12,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:12,394 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-01-31 18:20:12,394 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:12,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-01-31 18:20:12,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2022-01-31 18:20:12,395 INFO L87 Difference]: Start difference. First operand 56 states and 68 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:12,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:12,535 INFO L93 Difference]: Finished difference Result 136 states and 183 transitions. [2022-01-31 18:20:12,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 18:20:12,536 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 51 [2022-01-31 18:20:12,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:12,537 INFO L225 Difference]: With dead ends: 136 [2022-01-31 18:20:12,537 INFO L226 Difference]: Without dead ends: 123 [2022-01-31 18:20:12,537 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:20:12,538 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 194 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 120 mSolverCounterSat, 56 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 56 IncrementalHoareTripleChecker+Valid, 120 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:12,538 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 116 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [56 Valid, 120 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:12,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2022-01-31 18:20:12,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 60. [2022-01-31 18:20:12,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 54 states have (on average 1.2592592592592593) internal successors, (68), 54 states have internal predecessors, (68), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:12,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 73 transitions. [2022-01-31 18:20:12,543 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 73 transitions. Word has length 51 [2022-01-31 18:20:12,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:12,543 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 73 transitions. [2022-01-31 18:20:12,543 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 12 states have internal predecessors, (47), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:12,543 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 73 transitions. [2022-01-31 18:20:12,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2022-01-31 18:20:12,544 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:12,544 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:12,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 18:20:12,544 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:12,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:12,545 INFO L85 PathProgramCache]: Analyzing trace with hash -284433435, now seen corresponding path program 10 times [2022-01-31 18:20:12,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:12,545 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [16180223] [2022-01-31 18:20:12,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:12,549 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:12,549 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:12,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:12,551 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:12,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:12,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:12,692 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:12,692 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [16180223] [2022-01-31 18:20:12,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [16180223] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:12,693 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:12,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 18:20:12,693 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047088335] [2022-01-31 18:20:12,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:12,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 18:20:12,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:12,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 18:20:12,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=102, Unknown=0, NotChecked=0, Total=182 [2022-01-31 18:20:12,694 INFO L87 Difference]: Start difference. First operand 60 states and 73 transitions. Second operand has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:12,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:12,857 INFO L93 Difference]: Finished difference Result 146 states and 197 transitions. [2022-01-31 18:20:12,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2022-01-31 18:20:12,858 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 55 [2022-01-31 18:20:12,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:12,859 INFO L225 Difference]: With dead ends: 146 [2022-01-31 18:20:12,859 INFO L226 Difference]: Without dead ends: 133 [2022-01-31 18:20:12,859 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=94, Invalid=116, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:20:12,860 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 218 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 131 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 128 SdHoareTripleChecker+Invalid, 192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:12,860 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [229 Valid, 128 Invalid, 192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [61 Valid, 131 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:12,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2022-01-31 18:20:12,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 64. [2022-01-31 18:20:12,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 58 states have (on average 1.2586206896551724) internal successors, (73), 58 states have internal predecessors, (73), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:12,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 78 transitions. [2022-01-31 18:20:12,866 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 78 transitions. Word has length 55 [2022-01-31 18:20:12,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:12,867 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 78 transitions. [2022-01-31 18:20:12,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.642857142857143) internal successors, (51), 13 states have internal predecessors, (51), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:12,867 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 78 transitions. [2022-01-31 18:20:12,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2022-01-31 18:20:12,868 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:12,868 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:12,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 18:20:12,868 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:12,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:12,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1068700640, now seen corresponding path program 11 times [2022-01-31 18:20:12,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:12,869 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912262789] [2022-01-31 18:20:12,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:12,875 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:12,875 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:12,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:12,878 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:12,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:13,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:13,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:13,051 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:13,052 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912262789] [2022-01-31 18:20:13,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912262789] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:13,052 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:13,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 18:20:13,052 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624421278] [2022-01-31 18:20:13,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:13,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 18:20:13,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:13,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 18:20:13,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=117, Unknown=0, NotChecked=0, Total=210 [2022-01-31 18:20:13,054 INFO L87 Difference]: Start difference. First operand 64 states and 78 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:13,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:13,202 INFO L93 Difference]: Finished difference Result 156 states and 211 transitions. [2022-01-31 18:20:13,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 18:20:13,202 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 59 [2022-01-31 18:20:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:13,203 INFO L225 Difference]: With dead ends: 156 [2022-01-31 18:20:13,203 INFO L226 Difference]: Without dead ends: 143 [2022-01-31 18:20:13,204 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=108, Invalid=132, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:20:13,205 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 237 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 140 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 249 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 140 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:13,205 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [249 Valid, 132 Invalid, 205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [65 Valid, 140 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 18:20:13,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2022-01-31 18:20:13,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 68. [2022-01-31 18:20:13,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 62 states have (on average 1.2580645161290323) internal successors, (78), 62 states have internal predecessors, (78), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:13,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 83 transitions. [2022-01-31 18:20:13,214 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 83 transitions. Word has length 59 [2022-01-31 18:20:13,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:13,214 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 83 transitions. [2022-01-31 18:20:13,215 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 14 states have internal predecessors, (55), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:13,215 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 83 transitions. [2022-01-31 18:20:13,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2022-01-31 18:20:13,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:13,216 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:13,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 18:20:13,217 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:13,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:13,217 INFO L85 PathProgramCache]: Analyzing trace with hash 2097766107, now seen corresponding path program 12 times [2022-01-31 18:20:13,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:13,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1909164933] [2022-01-31 18:20:13,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:13,222 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:13,222 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:13,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:13,224 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:13,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:13,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:13,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:13,429 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:13,429 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:13,430 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1909164933] [2022-01-31 18:20:13,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1909164933] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:13,430 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:13,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 18:20:13,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706380544] [2022-01-31 18:20:13,430 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:13,430 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 18:20:13,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:13,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 18:20:13,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=133, Unknown=0, NotChecked=0, Total=240 [2022-01-31 18:20:13,431 INFO L87 Difference]: Start difference. First operand 68 states and 83 transitions. Second operand has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:13,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:13,629 INFO L93 Difference]: Finished difference Result 166 states and 225 transitions. [2022-01-31 18:20:13,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 18:20:13,630 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 63 [2022-01-31 18:20:13,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:13,631 INFO L225 Difference]: With dead ends: 166 [2022-01-31 18:20:13,632 INFO L226 Difference]: Without dead ends: 153 [2022-01-31 18:20:13,632 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=123, Invalid=149, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:20:13,632 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 224 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 151 mSolverCounterSat, 60 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 237 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 211 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 60 IncrementalHoareTripleChecker+Valid, 151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:13,633 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [237 Valid, 149 Invalid, 211 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [60 Valid, 151 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:13,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2022-01-31 18:20:13,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 72. [2022-01-31 18:20:13,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 66 states have (on average 1.2575757575757576) internal successors, (83), 66 states have internal predecessors, (83), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:13,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 88 transitions. [2022-01-31 18:20:13,640 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 88 transitions. Word has length 63 [2022-01-31 18:20:13,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:13,640 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 88 transitions. [2022-01-31 18:20:13,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.6875) internal successors, (59), 15 states have internal predecessors, (59), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:13,640 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 88 transitions. [2022-01-31 18:20:13,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2022-01-31 18:20:13,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:13,641 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:13,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 18:20:13,642 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:13,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:13,642 INFO L85 PathProgramCache]: Analyzing trace with hash -863503338, now seen corresponding path program 13 times [2022-01-31 18:20:13,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:13,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [150719671] [2022-01-31 18:20:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:13,651 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:13,651 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:13,651 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:13,653 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:13,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:13,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:13,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:13,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:13,872 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:13,872 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [150719671] [2022-01-31 18:20:13,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [150719671] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:13,873 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:13,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2022-01-31 18:20:13,873 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990759432] [2022-01-31 18:20:13,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:13,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-01-31 18:20:13,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:13,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-01-31 18:20:13,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=150, Unknown=0, NotChecked=0, Total=272 [2022-01-31 18:20:13,874 INFO L87 Difference]: Start difference. First operand 72 states and 88 transitions. Second operand has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:14,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:14,081 INFO L93 Difference]: Finished difference Result 176 states and 239 transitions. [2022-01-31 18:20:14,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 18:20:14,081 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 67 [2022-01-31 18:20:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:14,083 INFO L225 Difference]: With dead ends: 176 [2022-01-31 18:20:14,083 INFO L226 Difference]: Without dead ends: 163 [2022-01-31 18:20:14,083 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=167, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:20:14,084 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 204 mSDsluCounter, 140 mSDsCounter, 0 mSdLazyCounter, 198 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 175 SdHoareTripleChecker+Invalid, 249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:14,084 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [218 Valid, 175 Invalid, 249 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 198 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:14,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2022-01-31 18:20:14,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 76. [2022-01-31 18:20:14,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 70 states have (on average 1.2571428571428571) internal successors, (88), 70 states have internal predecessors, (88), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:14,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 93 transitions. [2022-01-31 18:20:14,090 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 93 transitions. Word has length 67 [2022-01-31 18:20:14,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:14,090 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 93 transitions. [2022-01-31 18:20:14,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 16 states have internal predecessors, (63), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:14,090 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 93 transitions. [2022-01-31 18:20:14,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2022-01-31 18:20:14,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:14,091 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:14,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 18:20:14,091 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:14,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:14,092 INFO L85 PathProgramCache]: Analyzing trace with hash -726694959, now seen corresponding path program 14 times [2022-01-31 18:20:14,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:14,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [188619476] [2022-01-31 18:20:14,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:14,097 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:14,097 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:14,097 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:14,099 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:14,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:14,333 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:14,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:14,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:14,338 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:14,338 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [188619476] [2022-01-31 18:20:14,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [188619476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:14,338 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:14,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 18:20:14,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994996343] [2022-01-31 18:20:14,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:14,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 18:20:14,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:14,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 18:20:14,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=168, Unknown=0, NotChecked=0, Total=306 [2022-01-31 18:20:14,339 INFO L87 Difference]: Start difference. First operand 76 states and 93 transitions. Second operand has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:14,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:14,549 INFO L93 Difference]: Finished difference Result 186 states and 253 transitions. [2022-01-31 18:20:14,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2022-01-31 18:20:14,551 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 71 [2022-01-31 18:20:14,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:14,552 INFO L225 Difference]: With dead ends: 186 [2022-01-31 18:20:14,552 INFO L226 Difference]: Without dead ends: 173 [2022-01-31 18:20:14,552 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:20:14,553 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 256 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 271 SdHoareTripleChecker+Valid, 182 SdHoareTripleChecker+Invalid, 261 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:14,553 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [271 Valid, 182 Invalid, 261 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 192 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:14,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2022-01-31 18:20:14,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 80. [2022-01-31 18:20:14,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 74 states have (on average 1.2567567567567568) internal successors, (93), 74 states have internal predecessors, (93), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:14,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 98 transitions. [2022-01-31 18:20:14,558 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 98 transitions. Word has length 71 [2022-01-31 18:20:14,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:14,558 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 98 transitions. [2022-01-31 18:20:14,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.7222222222222223) internal successors, (67), 17 states have internal predecessors, (67), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:14,558 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 98 transitions. [2022-01-31 18:20:14,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2022-01-31 18:20:14,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:14,559 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:14,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 18:20:14,559 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:14,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:14,560 INFO L85 PathProgramCache]: Analyzing trace with hash -368658932, now seen corresponding path program 15 times [2022-01-31 18:20:14,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:14,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [412077170] [2022-01-31 18:20:14,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:14,568 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:14,568 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:14,568 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:14,570 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:14,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:14,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:14,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:14,792 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:14,792 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [412077170] [2022-01-31 18:20:14,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [412077170] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:14,792 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:14,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 18:20:14,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011852125] [2022-01-31 18:20:14,792 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:14,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 18:20:14,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:14,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 18:20:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=187, Unknown=0, NotChecked=0, Total=342 [2022-01-31 18:20:14,793 INFO L87 Difference]: Start difference. First operand 80 states and 98 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:15,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:15,014 INFO L93 Difference]: Finished difference Result 196 states and 267 transitions. [2022-01-31 18:20:15,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 18:20:15,015 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 75 [2022-01-31 18:20:15,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:15,016 INFO L225 Difference]: With dead ends: 196 [2022-01-31 18:20:15,016 INFO L226 Difference]: Without dead ends: 183 [2022-01-31 18:20:15,016 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=174, Invalid=206, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:20:15,017 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 267 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 283 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 266 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:15,017 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [283 Valid, 186 Invalid, 266 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [70 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:15,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2022-01-31 18:20:15,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 84. [2022-01-31 18:20:15,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 78 states have (on average 1.2564102564102564) internal successors, (98), 78 states have internal predecessors, (98), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:15,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 103 transitions. [2022-01-31 18:20:15,022 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 103 transitions. Word has length 75 [2022-01-31 18:20:15,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:15,022 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 103 transitions. [2022-01-31 18:20:15,022 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 18 states have internal predecessors, (71), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:15,022 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 103 transitions. [2022-01-31 18:20:15,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2022-01-31 18:20:15,022 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:15,023 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:15,023 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 18:20:15,023 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:15,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:15,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1068782279, now seen corresponding path program 16 times [2022-01-31 18:20:15,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:15,023 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [278076067] [2022-01-31 18:20:15,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:15,027 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:15,027 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:15,028 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:15,030 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:15,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,278 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:15,278 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:15,278 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [278076067] [2022-01-31 18:20:15,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [278076067] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:15,278 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:15,278 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 18:20:15,278 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083114769] [2022-01-31 18:20:15,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:15,279 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 18:20:15,279 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:15,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 18:20:15,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=207, Unknown=0, NotChecked=0, Total=380 [2022-01-31 18:20:15,280 INFO L87 Difference]: Start difference. First operand 84 states and 103 transitions. Second operand has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:15,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:15,522 INFO L93 Difference]: Finished difference Result 206 states and 281 transitions. [2022-01-31 18:20:15,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 18:20:15,523 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 79 [2022-01-31 18:20:15,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:15,524 INFO L225 Difference]: With dead ends: 206 [2022-01-31 18:20:15,524 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 18:20:15,524 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=227, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:20:15,525 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 373 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 224 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 390 SdHoareTripleChecker+Valid, 187 SdHoareTripleChecker+Invalid, 324 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 224 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:15,525 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [390 Valid, 187 Invalid, 324 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 224 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:15,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 18:20:15,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 88. [2022-01-31 18:20:15,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 82 states have (on average 1.2560975609756098) internal successors, (103), 82 states have internal predecessors, (103), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:15,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 108 transitions. [2022-01-31 18:20:15,530 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 108 transitions. Word has length 79 [2022-01-31 18:20:15,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:15,530 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 108 transitions. [2022-01-31 18:20:15,530 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.75) internal successors, (75), 19 states have internal predecessors, (75), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:15,530 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 108 transitions. [2022-01-31 18:20:15,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2022-01-31 18:20:15,531 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:15,531 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:15,531 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 18:20:15,531 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:15,531 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:15,531 INFO L85 PathProgramCache]: Analyzing trace with hash -1753277950, now seen corresponding path program 17 times [2022-01-31 18:20:15,531 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:15,532 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1340055821] [2022-01-31 18:20:15,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:15,539 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:15,539 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:15,540 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:15,544 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:15,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:15,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:15,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:15,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:15,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1340055821] [2022-01-31 18:20:15,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1340055821] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:15,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:15,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 18:20:15,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961068446] [2022-01-31 18:20:15,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:15,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 18:20:15,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:15,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 18:20:15,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=228, Unknown=0, NotChecked=0, Total=420 [2022-01-31 18:20:15,824 INFO L87 Difference]: Start difference. First operand 88 states and 108 transitions. Second operand has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:16,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:16,070 INFO L93 Difference]: Finished difference Result 216 states and 295 transitions. [2022-01-31 18:20:16,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 18:20:16,071 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 83 [2022-01-31 18:20:16,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:16,072 INFO L225 Difference]: With dead ends: 216 [2022-01-31 18:20:16,072 INFO L226 Difference]: Without dead ends: 203 [2022-01-31 18:20:16,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=249, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:20:16,073 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 464 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 190 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 482 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 320 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:16,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [482 Valid, 191 Invalid, 320 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 190 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:16,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2022-01-31 18:20:16,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 92. [2022-01-31 18:20:16,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 86 states have (on average 1.255813953488372) internal successors, (108), 86 states have internal predecessors, (108), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:16,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 113 transitions. [2022-01-31 18:20:16,080 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 113 transitions. Word has length 83 [2022-01-31 18:20:16,080 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:16,080 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 113 transitions. [2022-01-31 18:20:16,081 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.761904761904762) internal successors, (79), 20 states have internal predecessors, (79), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:16,081 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 113 transitions. [2022-01-31 18:20:16,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2022-01-31 18:20:16,081 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:16,082 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:16,082 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 18:20:16,082 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:16,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:16,082 INFO L85 PathProgramCache]: Analyzing trace with hash -238171203, now seen corresponding path program 18 times [2022-01-31 18:20:16,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:16,082 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [455956712] [2022-01-31 18:20:16,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:16,087 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:16,087 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:16,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:16,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:16,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:16,410 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:16,410 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [455956712] [2022-01-31 18:20:16,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [455956712] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:16,411 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:16,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 18:20:16,411 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049643210] [2022-01-31 18:20:16,411 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:16,411 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 18:20:16,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:16,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 18:20:16,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=250, Unknown=0, NotChecked=0, Total=462 [2022-01-31 18:20:16,412 INFO L87 Difference]: Start difference. First operand 92 states and 113 transitions. Second operand has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:16,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:16,669 INFO L93 Difference]: Finished difference Result 226 states and 309 transitions. [2022-01-31 18:20:16,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 18:20:16,670 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 87 [2022-01-31 18:20:16,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:16,671 INFO L225 Difference]: With dead ends: 226 [2022-01-31 18:20:16,672 INFO L226 Difference]: Without dead ends: 213 [2022-01-31 18:20:16,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=234, Invalid=272, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:20:16,673 INFO L933 BasicCegarLoop]: 40 mSDtfsCounter, 354 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 220 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 373 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:16,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [373 Valid, 202 Invalid, 313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 220 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:16,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2022-01-31 18:20:16,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 96. [2022-01-31 18:20:16,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 90 states have (on average 1.2555555555555555) internal successors, (113), 90 states have internal predecessors, (113), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 118 transitions. [2022-01-31 18:20:16,679 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 118 transitions. Word has length 87 [2022-01-31 18:20:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:16,679 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 118 transitions. [2022-01-31 18:20:16,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.772727272727273) internal successors, (83), 21 states have internal predecessors, (83), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 118 transitions. [2022-01-31 18:20:16,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2022-01-31 18:20:16,680 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:16,680 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:16,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 18:20:16,681 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:16,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:16,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1034364920, now seen corresponding path program 19 times [2022-01-31 18:20:16,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:16,681 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1485574924] [2022-01-31 18:20:16,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:16,685 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:16,685 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:16,686 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:16,688 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:16,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:17,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:17,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:17,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:17,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:17,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1485574924] [2022-01-31 18:20:17,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1485574924] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:17,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:17,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 18:20:17,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763992221] [2022-01-31 18:20:17,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:17,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 18:20:17,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:17,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 18:20:17,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=273, Unknown=0, NotChecked=0, Total=506 [2022-01-31 18:20:17,018 INFO L87 Difference]: Start difference. First operand 96 states and 118 transitions. Second operand has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:17,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:17,288 INFO L93 Difference]: Finished difference Result 236 states and 323 transitions. [2022-01-31 18:20:17,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 18:20:17,288 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 91 [2022-01-31 18:20:17,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:17,290 INFO L225 Difference]: With dead ends: 236 [2022-01-31 18:20:17,290 INFO L226 Difference]: Without dead ends: 223 [2022-01-31 18:20:17,290 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=256, Invalid=296, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:20:17,291 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 458 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 478 SdHoareTripleChecker+Valid, 211 SdHoareTripleChecker+Invalid, 345 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:17,291 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [478 Valid, 211 Invalid, 345 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:17,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2022-01-31 18:20:17,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 100. [2022-01-31 18:20:17,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 94 states have (on average 1.2553191489361701) internal successors, (118), 94 states have internal predecessors, (118), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:17,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 123 transitions. [2022-01-31 18:20:17,299 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 123 transitions. Word has length 91 [2022-01-31 18:20:17,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:17,299 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 123 transitions. [2022-01-31 18:20:17,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.782608695652174) internal successors, (87), 22 states have internal predecessors, (87), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:17,300 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 123 transitions. [2022-01-31 18:20:17,310 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2022-01-31 18:20:17,310 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:17,311 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:17,311 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 18:20:17,311 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:17,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:17,311 INFO L85 PathProgramCache]: Analyzing trace with hash 145878707, now seen corresponding path program 20 times [2022-01-31 18:20:17,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:17,312 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [307748054] [2022-01-31 18:20:17,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:17,316 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:17,316 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:17,316 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:17,320 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:17,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:17,658 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:17,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:17,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:17,662 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:17,662 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [307748054] [2022-01-31 18:20:17,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [307748054] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:17,662 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:17,662 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 18:20:17,662 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552451721] [2022-01-31 18:20:17,662 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:17,663 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 18:20:17,663 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:17,663 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 18:20:17,663 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=255, Invalid=297, Unknown=0, NotChecked=0, Total=552 [2022-01-31 18:20:17,664 INFO L87 Difference]: Start difference. First operand 100 states and 123 transitions. Second operand has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:17,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:17,964 INFO L93 Difference]: Finished difference Result 246 states and 337 transitions. [2022-01-31 18:20:17,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 18:20:17,964 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 95 [2022-01-31 18:20:17,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:17,967 INFO L225 Difference]: With dead ends: 246 [2022-01-31 18:20:17,967 INFO L226 Difference]: Without dead ends: 233 [2022-01-31 18:20:17,967 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=279, Invalid=321, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:20:17,968 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 483 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 227 mSolverCounterSat, 135 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 504 SdHoareTripleChecker+Valid, 218 SdHoareTripleChecker+Invalid, 362 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 135 IncrementalHoareTripleChecker+Valid, 227 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:17,968 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [504 Valid, 218 Invalid, 362 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [135 Valid, 227 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:17,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2022-01-31 18:20:17,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 104. [2022-01-31 18:20:17,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 98 states have (on average 1.2551020408163265) internal successors, (123), 98 states have internal predecessors, (123), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:17,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 128 transitions. [2022-01-31 18:20:17,976 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 128 transitions. Word has length 95 [2022-01-31 18:20:17,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:17,976 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 128 transitions. [2022-01-31 18:20:17,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.7916666666666665) internal successors, (91), 23 states have internal predecessors, (91), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:17,976 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 128 transitions. [2022-01-31 18:20:17,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2022-01-31 18:20:17,977 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:17,977 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:17,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 18:20:17,977 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:17,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:17,978 INFO L85 PathProgramCache]: Analyzing trace with hash 791994350, now seen corresponding path program 21 times [2022-01-31 18:20:17,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:17,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [411251427] [2022-01-31 18:20:17,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:17,986 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:17,986 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:17,986 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:17,990 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:18,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:18,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:18,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:18,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:18,351 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:18,351 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [411251427] [2022-01-31 18:20:18,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [411251427] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:18,351 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:18,351 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 18:20:18,351 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024706678] [2022-01-31 18:20:18,351 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:18,351 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 18:20:18,352 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:18,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 18:20:18,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=322, Unknown=0, NotChecked=0, Total=600 [2022-01-31 18:20:18,352 INFO L87 Difference]: Start difference. First operand 104 states and 128 transitions. Second operand has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:18,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:18,646 INFO L93 Difference]: Finished difference Result 256 states and 351 transitions. [2022-01-31 18:20:18,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 18:20:18,646 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 99 [2022-01-31 18:20:18,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:18,648 INFO L225 Difference]: With dead ends: 256 [2022-01-31 18:20:18,648 INFO L226 Difference]: Without dead ends: 243 [2022-01-31 18:20:18,648 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=303, Invalid=347, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:20:18,648 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 443 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 247 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 465 SdHoareTripleChecker+Valid, 229 SdHoareTripleChecker+Invalid, 364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 247 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:18,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [465 Valid, 229 Invalid, 364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 247 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:18,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2022-01-31 18:20:18,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 108. [2022-01-31 18:20:18,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 102 states have (on average 1.2549019607843137) internal successors, (128), 102 states have internal predecessors, (128), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:18,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 133 transitions. [2022-01-31 18:20:18,654 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 133 transitions. Word has length 99 [2022-01-31 18:20:18,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:18,654 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 133 transitions. [2022-01-31 18:20:18,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.8) internal successors, (95), 24 states have internal predecessors, (95), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:18,654 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 133 transitions. [2022-01-31 18:20:18,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2022-01-31 18:20:18,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:18,658 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:18,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 18:20:18,659 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:18,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:18,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1944667223, now seen corresponding path program 22 times [2022-01-31 18:20:18,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:18,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [702671742] [2022-01-31 18:20:18,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:18,663 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:18,663 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:18,663 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:18,666 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:18,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:19,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:19,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:19,043 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:19,044 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:19,044 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [702671742] [2022-01-31 18:20:19,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [702671742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:19,044 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:19,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 18:20:19,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143684134] [2022-01-31 18:20:19,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:19,044 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 18:20:19,044 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:19,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 18:20:19,045 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=302, Invalid=348, Unknown=0, NotChecked=0, Total=650 [2022-01-31 18:20:19,045 INFO L87 Difference]: Start difference. First operand 108 states and 133 transitions. Second operand has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:19,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:19,328 INFO L93 Difference]: Finished difference Result 266 states and 365 transitions. [2022-01-31 18:20:19,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 18:20:19,328 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 103 [2022-01-31 18:20:19,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:19,330 INFO L225 Difference]: With dead ends: 266 [2022-01-31 18:20:19,330 INFO L226 Difference]: Without dead ends: 253 [2022-01-31 18:20:19,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=328, Invalid=374, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:20:19,331 INFO L933 BasicCegarLoop]: 44 mSDtfsCounter, 479 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 502 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:19,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [502 Valid, 239 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 18:20:19,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2022-01-31 18:20:19,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 112. [2022-01-31 18:20:19,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 106 states have (on average 1.2547169811320755) internal successors, (133), 106 states have internal predecessors, (133), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:19,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 138 transitions. [2022-01-31 18:20:19,336 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 138 transitions. Word has length 103 [2022-01-31 18:20:19,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:19,336 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 138 transitions. [2022-01-31 18:20:19,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.8076923076923075) internal successors, (99), 25 states have internal predecessors, (99), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:19,337 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 138 transitions. [2022-01-31 18:20:19,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2022-01-31 18:20:19,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:19,337 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:19,338 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 18:20:19,338 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:19,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:19,338 INFO L85 PathProgramCache]: Analyzing trace with hash -1461829148, now seen corresponding path program 23 times [2022-01-31 18:20:19,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:19,338 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1770513357] [2022-01-31 18:20:19,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:19,342 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:19,342 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:19,342 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:19,345 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:19,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:19,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:19,726 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:19,726 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1770513357] [2022-01-31 18:20:19,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1770513357] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:19,727 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:19,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 18:20:19,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106426363] [2022-01-31 18:20:19,727 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:19,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 18:20:19,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:19,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 18:20:19,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=327, Invalid=375, Unknown=0, NotChecked=0, Total=702 [2022-01-31 18:20:19,728 INFO L87 Difference]: Start difference. First operand 112 states and 138 transitions. Second operand has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:20,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:20,037 INFO L93 Difference]: Finished difference Result 276 states and 379 transitions. [2022-01-31 18:20:20,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 18:20:20,038 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 107 [2022-01-31 18:20:20,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:20,039 INFO L225 Difference]: With dead ends: 276 [2022-01-31 18:20:20,039 INFO L226 Difference]: Without dead ends: 263 [2022-01-31 18:20:20,040 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=354, Invalid=402, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:20:20,040 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 543 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 567 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 412 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:20,043 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [567 Valid, 241 Invalid, 412 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:20,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2022-01-31 18:20:20,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 116. [2022-01-31 18:20:20,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 110 states have (on average 1.2545454545454546) internal successors, (138), 110 states have internal predecessors, (138), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:20,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 143 transitions. [2022-01-31 18:20:20,049 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 143 transitions. Word has length 107 [2022-01-31 18:20:20,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:20,049 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 143 transitions. [2022-01-31 18:20:20,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.814814814814815) internal successors, (103), 26 states have internal predecessors, (103), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:20,049 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 143 transitions. [2022-01-31 18:20:20,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2022-01-31 18:20:20,050 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:20,050 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:20,050 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 18:20:20,050 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:20,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:20,050 INFO L85 PathProgramCache]: Analyzing trace with hash 1840394911, now seen corresponding path program 24 times [2022-01-31 18:20:20,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:20,052 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2137750575] [2022-01-31 18:20:20,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:20,057 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:20,057 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:20,057 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:20,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:20,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:20,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:20,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:20,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:20,479 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:20,479 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2137750575] [2022-01-31 18:20:20,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2137750575] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:20,480 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:20,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 18:20:20,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783959221] [2022-01-31 18:20:20,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:20,480 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 18:20:20,480 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:20,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 18:20:20,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=353, Invalid=403, Unknown=0, NotChecked=0, Total=756 [2022-01-31 18:20:20,481 INFO L87 Difference]: Start difference. First operand 116 states and 143 transitions. Second operand has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 27 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:20,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:20,818 INFO L93 Difference]: Finished difference Result 286 states and 393 transitions. [2022-01-31 18:20:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 18:20:20,819 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 27 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 111 [2022-01-31 18:20:20,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:20,821 INFO L225 Difference]: With dead ends: 286 [2022-01-31 18:20:20,821 INFO L226 Difference]: Without dead ends: 273 [2022-01-31 18:20:20,821 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=381, Invalid=431, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:20:20,822 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 622 mSDsluCounter, 200 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 175 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 647 SdHoareTripleChecker+Valid, 246 SdHoareTripleChecker+Invalid, 450 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 175 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:20,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [647 Valid, 246 Invalid, 450 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [175 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:20,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2022-01-31 18:20:20,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 120. [2022-01-31 18:20:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 114 states have (on average 1.2543859649122806) internal successors, (143), 114 states have internal predecessors, (143), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 148 transitions. [2022-01-31 18:20:20,828 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 148 transitions. Word has length 111 [2022-01-31 18:20:20,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:20,829 INFO L470 AbstractCegarLoop]: Abstraction has 120 states and 148 transitions. [2022-01-31 18:20:20,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.8214285714285716) internal successors, (107), 27 states have internal predecessors, (107), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:20,829 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 148 transitions. [2022-01-31 18:20:20,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2022-01-31 18:20:20,830 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:20,830 INFO L514 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:20,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 18:20:20,830 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:20,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash -782676518, now seen corresponding path program 25 times [2022-01-31 18:20:20,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:20,830 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2140372859] [2022-01-31 18:20:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:20,834 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:20,834 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:20,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:20,838 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:20,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:21,257 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:21,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:21,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:21,261 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:21,261 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2140372859] [2022-01-31 18:20:21,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2140372859] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:21,261 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:21,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 18:20:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267747408] [2022-01-31 18:20:21,261 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:21,262 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 18:20:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 18:20:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=380, Invalid=432, Unknown=0, NotChecked=0, Total=812 [2022-01-31 18:20:21,263 INFO L87 Difference]: Start difference. First operand 120 states and 148 transitions. Second operand has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:21,604 INFO L93 Difference]: Finished difference Result 296 states and 407 transitions. [2022-01-31 18:20:21,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 18:20:21,605 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 115 [2022-01-31 18:20:21,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:21,607 INFO L225 Difference]: With dead ends: 296 [2022-01-31 18:20:21,607 INFO L226 Difference]: Without dead ends: 283 [2022-01-31 18:20:21,607 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=409, Invalid=461, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:20:21,608 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 647 mSDsluCounter, 210 mSDsCounter, 0 mSdLazyCounter, 265 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 673 SdHoareTripleChecker+Valid, 257 SdHoareTripleChecker+Invalid, 446 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 265 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:21,608 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [673 Valid, 257 Invalid, 446 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 265 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:21,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2022-01-31 18:20:21,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 124. [2022-01-31 18:20:21,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 118 states have (on average 1.2542372881355932) internal successors, (148), 118 states have internal predecessors, (148), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:21,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 153 transitions. [2022-01-31 18:20:21,615 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 153 transitions. Word has length 115 [2022-01-31 18:20:21,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:21,615 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 153 transitions. [2022-01-31 18:20:21,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.8275862068965516) internal successors, (111), 28 states have internal predecessors, (111), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 153 transitions. [2022-01-31 18:20:21,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2022-01-31 18:20:21,616 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:21,616 INFO L514 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:21,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 18:20:21,617 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:21,617 INFO L85 PathProgramCache]: Analyzing trace with hash -1992666219, now seen corresponding path program 26 times [2022-01-31 18:20:21,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:21,618 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [243065015] [2022-01-31 18:20:21,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:21,621 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:21,621 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:21,621 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:21,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:21,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:22,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:22,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:22,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:22,074 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:22,074 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [243065015] [2022-01-31 18:20:22,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [243065015] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:22,074 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:22,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 18:20:22,075 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722039214] [2022-01-31 18:20:22,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:22,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 18:20:22,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:22,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 18:20:22,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=408, Invalid=462, Unknown=0, NotChecked=0, Total=870 [2022-01-31 18:20:22,076 INFO L87 Difference]: Start difference. First operand 124 states and 153 transitions. Second operand has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 29 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:22,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:22,432 INFO L93 Difference]: Finished difference Result 306 states and 421 transitions. [2022-01-31 18:20:22,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 18:20:22,433 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 29 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 119 [2022-01-31 18:20:22,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:22,435 INFO L225 Difference]: With dead ends: 306 [2022-01-31 18:20:22,435 INFO L226 Difference]: Without dead ends: 293 [2022-01-31 18:20:22,435 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=438, Invalid=492, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:20:22,436 INFO L933 BasicCegarLoop]: 48 mSDtfsCounter, 622 mSDsluCounter, 230 mSDsCounter, 0 mSdLazyCounter, 291 mSolverCounterSat, 172 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 649 SdHoareTripleChecker+Valid, 278 SdHoareTripleChecker+Invalid, 463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 172 IncrementalHoareTripleChecker+Valid, 291 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:22,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [649 Valid, 278 Invalid, 463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [172 Valid, 291 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:22,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2022-01-31 18:20:22,442 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 128. [2022-01-31 18:20:22,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 122 states have (on average 1.2540983606557377) internal successors, (153), 122 states have internal predecessors, (153), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:22,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 158 transitions. [2022-01-31 18:20:22,443 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 158 transitions. Word has length 119 [2022-01-31 18:20:22,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:22,443 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 158 transitions. [2022-01-31 18:20:22,444 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.8333333333333335) internal successors, (115), 29 states have internal predecessors, (115), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:22,444 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 158 transitions. [2022-01-31 18:20:22,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2022-01-31 18:20:22,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:22,445 INFO L514 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:22,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 18:20:22,445 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:22,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:22,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1185152048, now seen corresponding path program 27 times [2022-01-31 18:20:22,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:22,445 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1830564937] [2022-01-31 18:20:22,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:22,449 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:22,449 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:22,449 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:22,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:22,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:22,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:22,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:22,947 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:22,947 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:22,947 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1830564937] [2022-01-31 18:20:22,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1830564937] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:22,948 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:22,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 18:20:22,948 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998536020] [2022-01-31 18:20:22,948 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:22,948 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 18:20:22,948 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:22,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 18:20:22,949 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=437, Invalid=493, Unknown=0, NotChecked=0, Total=930 [2022-01-31 18:20:22,949 INFO L87 Difference]: Start difference. First operand 128 states and 158 transitions. Second operand has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 30 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:23,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:23,338 INFO L93 Difference]: Finished difference Result 316 states and 435 transitions. [2022-01-31 18:20:23,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 18:20:23,339 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 30 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 123 [2022-01-31 18:20:23,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:23,340 INFO L225 Difference]: With dead ends: 316 [2022-01-31 18:20:23,340 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 18:20:23,341 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=468, Invalid=524, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:20:23,341 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 770 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 798 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 498 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:23,341 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [798 Valid, 270 Invalid, 498 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:23,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 18:20:23,347 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 132. [2022-01-31 18:20:23,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 126 states have (on average 1.253968253968254) internal successors, (158), 126 states have internal predecessors, (158), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:23,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 163 transitions. [2022-01-31 18:20:23,348 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 163 transitions. Word has length 123 [2022-01-31 18:20:23,348 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:23,348 INFO L470 AbstractCegarLoop]: Abstraction has 132 states and 163 transitions. [2022-01-31 18:20:23,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 3.838709677419355) internal successors, (119), 30 states have internal predecessors, (119), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:23,348 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 163 transitions. [2022-01-31 18:20:23,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2022-01-31 18:20:23,349 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:23,349 INFO L514 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:23,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 18:20:23,349 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:23,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:23,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1536876917, now seen corresponding path program 28 times [2022-01-31 18:20:23,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:23,350 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081075220] [2022-01-31 18:20:23,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:23,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:23,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:23,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:23,358 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:23,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:23,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:23,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:23,870 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:23,870 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:23,870 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081075220] [2022-01-31 18:20:23,870 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081075220] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:23,870 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:23,870 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 18:20:23,870 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334914353] [2022-01-31 18:20:23,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:23,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 18:20:23,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:23,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 18:20:23,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=467, Invalid=525, Unknown=0, NotChecked=0, Total=992 [2022-01-31 18:20:23,872 INFO L87 Difference]: Start difference. First operand 132 states and 163 transitions. Second operand has 32 states, 32 states have (on average 3.84375) internal successors, (123), 31 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:24,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:24,261 INFO L93 Difference]: Finished difference Result 326 states and 449 transitions. [2022-01-31 18:20:24,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 18:20:24,261 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 31 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 127 [2022-01-31 18:20:24,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:24,263 INFO L225 Difference]: With dead ends: 326 [2022-01-31 18:20:24,263 INFO L226 Difference]: Without dead ends: 313 [2022-01-31 18:20:24,263 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=499, Invalid=557, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:20:24,264 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 798 mSDsluCounter, 226 mSDsCounter, 0 mSdLazyCounter, 281 mSolverCounterSat, 226 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 827 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 507 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 226 IncrementalHoareTripleChecker+Valid, 281 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:24,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [827 Valid, 276 Invalid, 507 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [226 Valid, 281 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:24,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2022-01-31 18:20:24,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 136. [2022-01-31 18:20:24,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 130 states have (on average 1.2538461538461538) internal successors, (163), 130 states have internal predecessors, (163), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:24,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 168 transitions. [2022-01-31 18:20:24,270 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 168 transitions. Word has length 127 [2022-01-31 18:20:24,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:24,271 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 168 transitions. [2022-01-31 18:20:24,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.84375) internal successors, (123), 31 states have internal predecessors, (123), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:24,271 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 168 transitions. [2022-01-31 18:20:24,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2022-01-31 18:20:24,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:24,272 INFO L514 BasicCegarLoop]: trace histogram [29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:24,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 18:20:24,272 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:24,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:24,273 INFO L85 PathProgramCache]: Analyzing trace with hash 1536975814, now seen corresponding path program 29 times [2022-01-31 18:20:24,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:24,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [110863332] [2022-01-31 18:20:24,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:24,276 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:24,276 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:24,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:24,281 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:24,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:24,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:24,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:24,862 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:24,862 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [110863332] [2022-01-31 18:20:24,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [110863332] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:24,862 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:24,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 18:20:24,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748623395] [2022-01-31 18:20:24,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:24,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 18:20:24,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:24,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 18:20:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=498, Invalid=558, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 18:20:24,864 INFO L87 Difference]: Start difference. First operand 136 states and 168 transitions. Second operand has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 32 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:25,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:25,284 INFO L93 Difference]: Finished difference Result 336 states and 463 transitions. [2022-01-31 18:20:25,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 18:20:25,285 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 32 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 131 [2022-01-31 18:20:25,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:25,287 INFO L225 Difference]: With dead ends: 336 [2022-01-31 18:20:25,287 INFO L226 Difference]: Without dead ends: 323 [2022-01-31 18:20:25,287 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=531, Invalid=591, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:20:25,288 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 507 mSDsluCounter, 276 mSDsCounter, 0 mSdLazyCounter, 398 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 537 SdHoareTripleChecker+Valid, 327 SdHoareTripleChecker+Invalid, 528 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:25,288 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [537 Valid, 327 Invalid, 528 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 398 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:25,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2022-01-31 18:20:25,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 140. [2022-01-31 18:20:25,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 134 states have (on average 1.2537313432835822) internal successors, (168), 134 states have internal predecessors, (168), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:25,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 173 transitions. [2022-01-31 18:20:25,295 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 173 transitions. Word has length 131 [2022-01-31 18:20:25,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:25,295 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 173 transitions. [2022-01-31 18:20:25,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.8484848484848486) internal successors, (127), 32 states have internal predecessors, (127), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:25,295 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 173 transitions. [2022-01-31 18:20:25,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2022-01-31 18:20:25,296 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:25,296 INFO L514 BasicCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:25,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 18:20:25,297 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:25,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:25,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1860735873, now seen corresponding path program 30 times [2022-01-31 18:20:25,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:25,297 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [952697764] [2022-01-31 18:20:25,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:25,301 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:25,301 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:25,301 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:25,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:25,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:25,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:25,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:25,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:25,897 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:25,897 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [952697764] [2022-01-31 18:20:25,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [952697764] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:25,898 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:25,898 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 18:20:25,898 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641432193] [2022-01-31 18:20:25,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:25,898 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 18:20:25,898 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:25,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 18:20:25,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=592, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 18:20:25,899 INFO L87 Difference]: Start difference. First operand 140 states and 173 transitions. Second operand has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 33 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:26,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:26,285 INFO L93 Difference]: Finished difference Result 346 states and 477 transitions. [2022-01-31 18:20:26,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 18:20:26,286 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 33 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 135 [2022-01-31 18:20:26,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:26,288 INFO L225 Difference]: With dead ends: 346 [2022-01-31 18:20:26,288 INFO L226 Difference]: Without dead ends: 333 [2022-01-31 18:20:26,288 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=564, Invalid=626, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:20:26,289 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 717 mSDsluCounter, 258 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 195 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 748 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 195 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:26,289 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [748 Valid, 310 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [195 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 18:20:26,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 333 states. [2022-01-31 18:20:26,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 333 to 144. [2022-01-31 18:20:26,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 138 states have (on average 1.2536231884057971) internal successors, (173), 138 states have internal predecessors, (173), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:26,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 178 transitions. [2022-01-31 18:20:26,297 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 178 transitions. Word has length 135 [2022-01-31 18:20:26,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:26,297 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 178 transitions. [2022-01-31 18:20:26,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 3.8529411764705883) internal successors, (131), 33 states have internal predecessors, (131), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:26,297 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 178 transitions. [2022-01-31 18:20:26,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2022-01-31 18:20:26,298 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:26,299 INFO L514 BasicCegarLoop]: trace histogram [31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:26,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 18:20:26,299 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:26,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:26,299 INFO L85 PathProgramCache]: Analyzing trace with hash -1664062020, now seen corresponding path program 31 times [2022-01-31 18:20:26,299 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:26,299 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280498679] [2022-01-31 18:20:26,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:26,303 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:26,303 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:26,303 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:26,308 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:26,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:26,908 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:26,908 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:26,908 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280498679] [2022-01-31 18:20:26,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280498679] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:26,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:26,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 18:20:26,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436287923] [2022-01-31 18:20:26,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:26,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 18:20:26,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:26,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 18:20:26,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=563, Invalid=627, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 18:20:26,911 INFO L87 Difference]: Start difference. First operand 144 states and 178 transitions. Second operand has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 34 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:27,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:27,383 INFO L93 Difference]: Finished difference Result 356 states and 491 transitions. [2022-01-31 18:20:27,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 18:20:27,384 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 34 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 139 [2022-01-31 18:20:27,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:27,386 INFO L225 Difference]: With dead ends: 356 [2022-01-31 18:20:27,386 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 18:20:27,386 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=598, Invalid=662, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:20:27,387 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 696 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 351 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 728 SdHoareTripleChecker+Valid, 306 SdHoareTripleChecker+Invalid, 538 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 351 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:27,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [728 Valid, 306 Invalid, 538 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 351 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:27,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 18:20:27,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 148. [2022-01-31 18:20:27,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 142 states have (on average 1.2535211267605635) internal successors, (178), 142 states have internal predecessors, (178), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:27,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 183 transitions. [2022-01-31 18:20:27,395 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 183 transitions. Word has length 139 [2022-01-31 18:20:27,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:27,395 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 183 transitions. [2022-01-31 18:20:27,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.857142857142857) internal successors, (135), 34 states have internal predecessors, (135), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:27,396 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 183 transitions. [2022-01-31 18:20:27,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2022-01-31 18:20:27,397 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:27,397 INFO L514 BasicCegarLoop]: trace histogram [32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:27,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 18:20:27,397 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:27,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:27,397 INFO L85 PathProgramCache]: Analyzing trace with hash -2105888137, now seen corresponding path program 32 times [2022-01-31 18:20:27,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:27,398 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1518334331] [2022-01-31 18:20:27,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:27,402 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:27,402 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:27,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:27,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:28,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:28,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:28,092 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:28,093 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:28,093 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1518334331] [2022-01-31 18:20:28,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1518334331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:28,093 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:28,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 18:20:28,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240099916] [2022-01-31 18:20:28,093 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:28,094 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 18:20:28,094 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:28,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 18:20:28,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=597, Invalid=663, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 18:20:28,095 INFO L87 Difference]: Start difference. First operand 148 states and 183 transitions. Second operand has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 35 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:28,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:28,556 INFO L93 Difference]: Finished difference Result 366 states and 505 transitions. [2022-01-31 18:20:28,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 18:20:28,557 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 35 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 143 [2022-01-31 18:20:28,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:28,559 INFO L225 Difference]: With dead ends: 366 [2022-01-31 18:20:28,559 INFO L226 Difference]: Without dead ends: 353 [2022-01-31 18:20:28,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=633, Invalid=699, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:20:28,560 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 733 mSDsluCounter, 281 mSDsCounter, 0 mSdLazyCounter, 376 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 766 SdHoareTripleChecker+Valid, 335 SdHoareTripleChecker+Invalid, 573 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 376 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:28,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [766 Valid, 335 Invalid, 573 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 376 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2022-01-31 18:20:28,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 152. [2022-01-31 18:20:28,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 146 states have (on average 1.2534246575342465) internal successors, (183), 146 states have internal predecessors, (183), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:28,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 188 transitions. [2022-01-31 18:20:28,567 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 188 transitions. Word has length 143 [2022-01-31 18:20:28,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:28,567 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 188 transitions. [2022-01-31 18:20:28,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.861111111111111) internal successors, (139), 35 states have internal predecessors, (139), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:28,567 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 188 transitions. [2022-01-31 18:20:28,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2022-01-31 18:20:28,568 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:28,568 INFO L514 BasicCegarLoop]: trace histogram [33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:28,568 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 18:20:28,569 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:28,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:28,569 INFO L85 PathProgramCache]: Analyzing trace with hash 1269703090, now seen corresponding path program 33 times [2022-01-31 18:20:28,569 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:28,569 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1206192868] [2022-01-31 18:20:28,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:28,574 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:28,574 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:28,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:28,579 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:28,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:29,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:29,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:29,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:29,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:29,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1206192868] [2022-01-31 18:20:29,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1206192868] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:29,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:29,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 18:20:29,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476744357] [2022-01-31 18:20:29,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:29,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 18:20:29,161 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 18:20:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=632, Invalid=700, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 18:20:29,163 INFO L87 Difference]: Start difference. First operand 152 states and 188 transitions. Second operand has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 36 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:29,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:29,634 INFO L93 Difference]: Finished difference Result 376 states and 519 transitions. [2022-01-31 18:20:29,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 18:20:29,635 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 36 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 147 [2022-01-31 18:20:29,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:29,637 INFO L225 Difference]: With dead ends: 376 [2022-01-31 18:20:29,637 INFO L226 Difference]: Without dead ends: 363 [2022-01-31 18:20:29,638 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=669, Invalid=737, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:20:29,638 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 600 mSDsluCounter, 314 mSDsCounter, 0 mSdLazyCounter, 440 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 634 SdHoareTripleChecker+Valid, 369 SdHoareTripleChecker+Invalid, 596 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:29,638 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [634 Valid, 369 Invalid, 596 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 440 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:29,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2022-01-31 18:20:29,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 156. [2022-01-31 18:20:29,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 150 states have (on average 1.2533333333333334) internal successors, (188), 150 states have internal predecessors, (188), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:29,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 193 transitions. [2022-01-31 18:20:29,646 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 193 transitions. Word has length 147 [2022-01-31 18:20:29,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:29,646 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 193 transitions. [2022-01-31 18:20:29,646 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.864864864864865) internal successors, (143), 36 states have internal predecessors, (143), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:29,646 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 193 transitions. [2022-01-31 18:20:29,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2022-01-31 18:20:29,647 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:29,647 INFO L514 BasicCegarLoop]: trace histogram [34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:29,647 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 18:20:29,647 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:29,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:29,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1657895789, now seen corresponding path program 34 times [2022-01-31 18:20:29,648 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:29,648 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [350877819] [2022-01-31 18:20:29,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:29,652 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:29,652 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:29,652 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:29,656 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:30,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:30,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:30,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:30,310 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:30,310 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [350877819] [2022-01-31 18:20:30,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [350877819] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:30,311 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:30,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 18:20:30,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767030053] [2022-01-31 18:20:30,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:30,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 18:20:30,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:30,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 18:20:30,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=668, Invalid=738, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 18:20:30,312 INFO L87 Difference]: Start difference. First operand 156 states and 193 transitions. Second operand has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 37 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:30,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:30,768 INFO L93 Difference]: Finished difference Result 386 states and 533 transitions. [2022-01-31 18:20:30,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2022-01-31 18:20:30,768 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 37 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 151 [2022-01-31 18:20:30,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:30,770 INFO L225 Difference]: With dead ends: 386 [2022-01-31 18:20:30,770 INFO L226 Difference]: Without dead ends: 373 [2022-01-31 18:20:30,771 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=706, Invalid=776, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:20:30,771 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 725 mSDsluCounter, 283 mSDsCounter, 0 mSdLazyCounter, 389 mSolverCounterSat, 191 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 760 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 580 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 191 IncrementalHoareTripleChecker+Valid, 389 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:30,771 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [760 Valid, 339 Invalid, 580 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [191 Valid, 389 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:30,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2022-01-31 18:20:30,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 160. [2022-01-31 18:20:30,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 154 states have (on average 1.2532467532467533) internal successors, (193), 154 states have internal predecessors, (193), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:30,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 198 transitions. [2022-01-31 18:20:30,779 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 198 transitions. Word has length 151 [2022-01-31 18:20:30,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:30,780 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 198 transitions. [2022-01-31 18:20:30,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 3.8684210526315788) internal successors, (147), 37 states have internal predecessors, (147), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:30,780 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 198 transitions. [2022-01-31 18:20:30,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2022-01-31 18:20:30,781 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:30,781 INFO L514 BasicCegarLoop]: trace histogram [35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:30,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 18:20:30,781 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:30,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:30,782 INFO L85 PathProgramCache]: Analyzing trace with hash 552304552, now seen corresponding path program 35 times [2022-01-31 18:20:30,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:30,782 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [577261062] [2022-01-31 18:20:30,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:30,785 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:30,786 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:30,786 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:30,791 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:31,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:31,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:31,475 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:31,475 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [577261062] [2022-01-31 18:20:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [577261062] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:31,475 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:31,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 18:20:31,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284410819] [2022-01-31 18:20:31,476 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:31,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 18:20:31,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:31,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 18:20:31,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=705, Invalid=777, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 18:20:31,477 INFO L87 Difference]: Start difference. First operand 160 states and 198 transitions. Second operand has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 38 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:31,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:31,965 INFO L93 Difference]: Finished difference Result 396 states and 547 transitions. [2022-01-31 18:20:31,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 18:20:31,965 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 38 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 155 [2022-01-31 18:20:31,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:31,967 INFO L225 Difference]: With dead ends: 396 [2022-01-31 18:20:31,968 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 18:20:31,968 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=744, Invalid=816, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:20:31,969 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 975 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 356 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 356 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:31,969 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 346 Invalid, 630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 356 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:31,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 18:20:31,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 164. [2022-01-31 18:20:31,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 158 states have (on average 1.2531645569620253) internal successors, (198), 158 states have internal predecessors, (198), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:31,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 203 transitions. [2022-01-31 18:20:31,977 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 203 transitions. Word has length 155 [2022-01-31 18:20:31,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:31,977 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 203 transitions. [2022-01-31 18:20:31,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.871794871794872) internal successors, (151), 38 states have internal predecessors, (151), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:31,977 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 203 transitions. [2022-01-31 18:20:31,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2022-01-31 18:20:31,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:31,979 INFO L514 BasicCegarLoop]: trace histogram [36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:31,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 18:20:31,979 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:31,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:31,979 INFO L85 PathProgramCache]: Analyzing trace with hash 2107829859, now seen corresponding path program 36 times [2022-01-31 18:20:31,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:31,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1060248379] [2022-01-31 18:20:31,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:31,983 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:31,983 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:31,983 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:31,988 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:32,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:32,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:32,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:32,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:32,706 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:32,706 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1060248379] [2022-01-31 18:20:32,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1060248379] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:32,706 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:32,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 18:20:32,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964706895] [2022-01-31 18:20:32,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:32,708 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 18:20:32,708 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 18:20:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=817, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 18:20:32,709 INFO L87 Difference]: Start difference. First operand 164 states and 203 transitions. Second operand has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:33,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:33,172 INFO L93 Difference]: Finished difference Result 406 states and 561 transitions. [2022-01-31 18:20:33,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 18:20:33,173 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 159 [2022-01-31 18:20:33,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:33,175 INFO L225 Difference]: With dead ends: 406 [2022-01-31 18:20:33,175 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 18:20:33,176 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=783, Invalid=857, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:20:33,176 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 831 mSDsluCounter, 315 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 227 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 868 SdHoareTripleChecker+Valid, 373 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 227 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:33,176 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [868 Valid, 373 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [227 Valid, 407 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:33,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 18:20:33,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 168. [2022-01-31 18:20:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 162 states have (on average 1.2530864197530864) internal successors, (203), 162 states have internal predecessors, (203), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 208 transitions. [2022-01-31 18:20:33,184 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 208 transitions. Word has length 159 [2022-01-31 18:20:33,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:33,184 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 208 transitions. [2022-01-31 18:20:33,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.875) internal successors, (155), 39 states have internal predecessors, (155), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:33,184 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 208 transitions. [2022-01-31 18:20:33,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2022-01-31 18:20:33,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:33,185 INFO L514 BasicCegarLoop]: trace histogram [37, 37, 37, 37, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:33,186 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 18:20:33,186 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:33,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:33,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1086421090, now seen corresponding path program 37 times [2022-01-31 18:20:33,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:33,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [424086526] [2022-01-31 18:20:33,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:33,190 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:33,190 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:33,190 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:33,195 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:33,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:33,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:33,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:33,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:33,913 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:33,913 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [424086526] [2022-01-31 18:20:33,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [424086526] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:33,913 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:33,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 18:20:33,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469843565] [2022-01-31 18:20:33,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:33,914 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 18:20:33,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:33,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 18:20:33,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=782, Invalid=858, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 18:20:33,915 INFO L87 Difference]: Start difference. First operand 168 states and 208 transitions. Second operand has 41 states, 41 states have (on average 3.8780487804878048) internal successors, (159), 40 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:34,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:34,398 INFO L93 Difference]: Finished difference Result 416 states and 575 transitions. [2022-01-31 18:20:34,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 18:20:34,399 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 3.8780487804878048) internal successors, (159), 40 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 163 [2022-01-31 18:20:34,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:34,401 INFO L225 Difference]: With dead ends: 416 [2022-01-31 18:20:34,401 INFO L226 Difference]: Without dead ends: 403 [2022-01-31 18:20:34,402 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=823, Invalid=899, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:20:34,402 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 991 mSDsluCounter, 305 mSDsCounter, 0 mSdLazyCounter, 415 mSolverCounterSat, 276 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1029 SdHoareTripleChecker+Valid, 364 SdHoareTripleChecker+Invalid, 691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 276 IncrementalHoareTripleChecker+Valid, 415 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:34,402 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1029 Valid, 364 Invalid, 691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [276 Valid, 415 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 403 states. [2022-01-31 18:20:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 403 to 172. [2022-01-31 18:20:34,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 166 states have (on average 1.2530120481927711) internal successors, (208), 166 states have internal predecessors, (208), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:34,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 213 transitions. [2022-01-31 18:20:34,409 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 213 transitions. Word has length 163 [2022-01-31 18:20:34,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:34,410 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 213 transitions. [2022-01-31 18:20:34,410 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 3.8780487804878048) internal successors, (159), 40 states have internal predecessors, (159), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:34,410 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 213 transitions. [2022-01-31 18:20:34,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2022-01-31 18:20:34,411 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:34,411 INFO L514 BasicCegarLoop]: trace histogram [38, 38, 38, 38, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:34,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 18:20:34,412 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:34,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:34,412 INFO L85 PathProgramCache]: Analyzing trace with hash 715459417, now seen corresponding path program 38 times [2022-01-31 18:20:34,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:34,412 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1616823991] [2022-01-31 18:20:34,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:34,416 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:34,416 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:34,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:34,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:34,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:35,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:35,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:35,263 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:35,263 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1616823991] [2022-01-31 18:20:35,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1616823991] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:35,263 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:35,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 18:20:35,264 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907718866] [2022-01-31 18:20:35,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:35,264 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 18:20:35,264 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:35,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 18:20:35,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=822, Invalid=900, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 18:20:35,265 INFO L87 Difference]: Start difference. First operand 172 states and 213 transitions. Second operand has 42 states, 42 states have (on average 3.880952380952381) internal successors, (163), 41 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:35,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:35,820 INFO L93 Difference]: Finished difference Result 426 states and 589 transitions. [2022-01-31 18:20:35,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 18:20:35,820 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.880952380952381) internal successors, (163), 41 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 167 [2022-01-31 18:20:35,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:35,822 INFO L225 Difference]: With dead ends: 426 [2022-01-31 18:20:35,822 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 18:20:35,823 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=864, Invalid=942, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:20:35,823 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 896 mSDsluCounter, 317 mSDsCounter, 0 mSdLazyCounter, 434 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 935 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 677 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 434 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:35,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [935 Valid, 377 Invalid, 677 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 434 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:35,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 18:20:35,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 176. [2022-01-31 18:20:35,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 170 states have (on average 1.2529411764705882) internal successors, (213), 170 states have internal predecessors, (213), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:35,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 218 transitions. [2022-01-31 18:20:35,831 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 218 transitions. Word has length 167 [2022-01-31 18:20:35,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:35,831 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 218 transitions. [2022-01-31 18:20:35,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.880952380952381) internal successors, (163), 41 states have internal predecessors, (163), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:35,831 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 218 transitions. [2022-01-31 18:20:35,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2022-01-31 18:20:35,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:35,832 INFO L514 BasicCegarLoop]: trace histogram [39, 39, 39, 39, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:35,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 18:20:35,833 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:35,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:35,833 INFO L85 PathProgramCache]: Analyzing trace with hash -1285736044, now seen corresponding path program 39 times [2022-01-31 18:20:35,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:35,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1844415753] [2022-01-31 18:20:35,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:35,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:35,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:35,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:35,843 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:35,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:36,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:36,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:36,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:36,612 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:36,612 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1844415753] [2022-01-31 18:20:36,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1844415753] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:36,613 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:36,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 18:20:36,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350571777] [2022-01-31 18:20:36,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:36,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 18:20:36,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:36,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 18:20:36,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=863, Invalid=943, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 18:20:36,615 INFO L87 Difference]: Start difference. First operand 176 states and 218 transitions. Second operand has 43 states, 43 states have (on average 3.883720930232558) internal successors, (167), 42 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:37,185 INFO L93 Difference]: Finished difference Result 436 states and 603 transitions. [2022-01-31 18:20:37,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 18:20:37,185 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.883720930232558) internal successors, (167), 42 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 171 [2022-01-31 18:20:37,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:37,187 INFO L225 Difference]: With dead ends: 436 [2022-01-31 18:20:37,187 INFO L226 Difference]: Without dead ends: 423 [2022-01-31 18:20:37,188 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=906, Invalid=986, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:20:37,189 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 984 mSDsluCounter, 324 mSDsCounter, 0 mSdLazyCounter, 426 mSolverCounterSat, 272 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1024 SdHoareTripleChecker+Valid, 385 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 272 IncrementalHoareTripleChecker+Valid, 426 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:37,189 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1024 Valid, 385 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [272 Valid, 426 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:37,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2022-01-31 18:20:37,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 180. [2022-01-31 18:20:37,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 174 states have (on average 1.2528735632183907) internal successors, (218), 174 states have internal predecessors, (218), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 223 transitions. [2022-01-31 18:20:37,197 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 223 transitions. Word has length 171 [2022-01-31 18:20:37,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:37,198 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 223 transitions. [2022-01-31 18:20:37,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.883720930232558) internal successors, (167), 42 states have internal predecessors, (167), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:37,198 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 223 transitions. [2022-01-31 18:20:37,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2022-01-31 18:20:37,199 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:37,199 INFO L514 BasicCegarLoop]: trace histogram [40, 40, 40, 40, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:37,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 18:20:37,199 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:37,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:37,200 INFO L85 PathProgramCache]: Analyzing trace with hash -1416768945, now seen corresponding path program 40 times [2022-01-31 18:20:37,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:37,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1697543373] [2022-01-31 18:20:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:37,204 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:37,204 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:37,204 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:37,214 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:37,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:37,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:37,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:37,986 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:37,986 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:37,986 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1697543373] [2022-01-31 18:20:37,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1697543373] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:37,986 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:37,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 18:20:37,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329375298] [2022-01-31 18:20:37,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:37,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 18:20:37,986 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:37,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 18:20:37,987 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=905, Invalid=987, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 18:20:37,988 INFO L87 Difference]: Start difference. First operand 180 states and 223 transitions. Second operand has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 43 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:38,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:38,462 INFO L93 Difference]: Finished difference Result 446 states and 617 transitions. [2022-01-31 18:20:38,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 18:20:38,462 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 43 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 175 [2022-01-31 18:20:38,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:38,464 INFO L225 Difference]: With dead ends: 446 [2022-01-31 18:20:38,464 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 18:20:38,465 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=949, Invalid=1031, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:20:38,466 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 869 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 450 mSolverCounterSat, 233 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 910 SdHoareTripleChecker+Valid, 400 SdHoareTripleChecker+Invalid, 683 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 233 IncrementalHoareTripleChecker+Valid, 450 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:38,466 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [910 Valid, 400 Invalid, 683 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [233 Valid, 450 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:38,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 18:20:38,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 184. [2022-01-31 18:20:38,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 178 states have (on average 1.252808988764045) internal successors, (223), 178 states have internal predecessors, (223), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:38,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 228 transitions. [2022-01-31 18:20:38,473 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 228 transitions. Word has length 175 [2022-01-31 18:20:38,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:38,473 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 228 transitions. [2022-01-31 18:20:38,474 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 3.8863636363636362) internal successors, (171), 43 states have internal predecessors, (171), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:38,474 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 228 transitions. [2022-01-31 18:20:38,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2022-01-31 18:20:38,475 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:38,475 INFO L514 BasicCegarLoop]: trace histogram [41, 41, 41, 41, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:38,475 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 18:20:38,475 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:38,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1945998730, now seen corresponding path program 41 times [2022-01-31 18:20:38,476 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:38,476 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1850947134] [2022-01-31 18:20:38,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:38,479 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:38,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:38,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:38,486 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:38,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:39,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:39,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:39,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:39,276 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:39,276 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1850947134] [2022-01-31 18:20:39,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1850947134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:39,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:39,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 18:20:39,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766578701] [2022-01-31 18:20:39,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:39,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 18:20:39,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:39,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 18:20:39,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=948, Invalid=1032, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 18:20:39,279 INFO L87 Difference]: Start difference. First operand 184 states and 228 transitions. Second operand has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:39,819 INFO L93 Difference]: Finished difference Result 456 states and 631 transitions. [2022-01-31 18:20:39,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 18:20:39,820 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 179 [2022-01-31 18:20:39,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:39,821 INFO L225 Difference]: With dead ends: 456 [2022-01-31 18:20:39,822 INFO L226 Difference]: Without dead ends: 443 [2022-01-31 18:20:39,822 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=993, Invalid=1077, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:20:39,823 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 831 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 521 mSolverCounterSat, 219 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 873 SdHoareTripleChecker+Valid, 414 SdHoareTripleChecker+Invalid, 740 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 219 IncrementalHoareTripleChecker+Valid, 521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:39,823 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [873 Valid, 414 Invalid, 740 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [219 Valid, 521 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:39,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2022-01-31 18:20:39,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 188. [2022-01-31 18:20:39,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 182 states have (on average 1.2527472527472527) internal successors, (228), 182 states have internal predecessors, (228), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:39,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 233 transitions. [2022-01-31 18:20:39,830 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 233 transitions. Word has length 179 [2022-01-31 18:20:39,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:39,831 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 233 transitions. [2022-01-31 18:20:39,831 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.888888888888889) internal successors, (175), 44 states have internal predecessors, (175), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:39,831 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 233 transitions. [2022-01-31 18:20:39,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2022-01-31 18:20:39,832 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:39,833 INFO L514 BasicCegarLoop]: trace histogram [42, 42, 42, 42, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:39,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 18:20:39,833 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:39,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:39,833 INFO L85 PathProgramCache]: Analyzing trace with hash 739459909, now seen corresponding path program 42 times [2022-01-31 18:20:39,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:39,833 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [58400617] [2022-01-31 18:20:39,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:39,837 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:39,837 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:39,837 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:39,844 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:39,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:40,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:40,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:40,677 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:40,678 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:40,678 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [58400617] [2022-01-31 18:20:40,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [58400617] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:40,678 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:40,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 18:20:40,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756135179] [2022-01-31 18:20:40,678 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:40,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 18:20:40,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:40,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 18:20:40,679 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=992, Invalid=1078, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 18:20:40,680 INFO L87 Difference]: Start difference. First operand 188 states and 233 transitions. Second operand has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 45 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:41,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:41,202 INFO L93 Difference]: Finished difference Result 466 states and 645 transitions. [2022-01-31 18:20:41,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 18:20:41,202 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 45 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 183 [2022-01-31 18:20:41,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:41,204 INFO L225 Difference]: With dead ends: 466 [2022-01-31 18:20:41,204 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 18:20:41,205 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1038, Invalid=1124, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:20:41,206 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 1342 mSDsluCounter, 353 mSDsCounter, 0 mSdLazyCounter, 447 mSolverCounterSat, 390 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1385 SdHoareTripleChecker+Valid, 417 SdHoareTripleChecker+Invalid, 837 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 390 IncrementalHoareTripleChecker+Valid, 447 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:41,206 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1385 Valid, 417 Invalid, 837 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [390 Valid, 447 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:41,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 18:20:41,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 192. [2022-01-31 18:20:41,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 186 states have (on average 1.2526881720430108) internal successors, (233), 186 states have internal predecessors, (233), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 238 transitions. [2022-01-31 18:20:41,214 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 238 transitions. Word has length 183 [2022-01-31 18:20:41,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:41,214 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 238 transitions. [2022-01-31 18:20:41,214 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.891304347826087) internal successors, (179), 45 states have internal predecessors, (179), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:41,214 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 238 transitions. [2022-01-31 18:20:41,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2022-01-31 18:20:41,216 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:41,216 INFO L514 BasicCegarLoop]: trace histogram [43, 43, 43, 43, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:41,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 18:20:41,216 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:41,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:41,216 INFO L85 PathProgramCache]: Analyzing trace with hash 1641388928, now seen corresponding path program 43 times [2022-01-31 18:20:41,216 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:41,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [656268946] [2022-01-31 18:20:41,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:41,221 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:41,222 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:41,222 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:41,229 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:41,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:42,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:42,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:42,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:42,088 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:42,088 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [656268946] [2022-01-31 18:20:42,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [656268946] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:42,089 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:42,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 18:20:42,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159677290] [2022-01-31 18:20:42,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:42,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 18:20:42,089 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:42,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 18:20:42,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1037, Invalid=1125, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 18:20:42,091 INFO L87 Difference]: Start difference. First operand 192 states and 238 transitions. Second operand has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 46 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:42,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:42,633 INFO L93 Difference]: Finished difference Result 476 states and 659 transitions. [2022-01-31 18:20:42,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 18:20:42,634 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 46 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 187 [2022-01-31 18:20:42,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:42,636 INFO L225 Difference]: With dead ends: 476 [2022-01-31 18:20:42,636 INFO L226 Difference]: Without dead ends: 463 [2022-01-31 18:20:42,636 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1084, Invalid=1172, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:20:42,637 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 1032 mSDsluCounter, 372 mSDsCounter, 0 mSdLazyCounter, 494 mSolverCounterSat, 284 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1076 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 778 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 284 IncrementalHoareTripleChecker+Valid, 494 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:42,637 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1076 Valid, 437 Invalid, 778 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [284 Valid, 494 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:42,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 463 states. [2022-01-31 18:20:42,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 463 to 196. [2022-01-31 18:20:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 190 states have (on average 1.2526315789473683) internal successors, (238), 190 states have internal predecessors, (238), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:42,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 243 transitions. [2022-01-31 18:20:42,647 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 243 transitions. Word has length 187 [2022-01-31 18:20:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:42,647 INFO L470 AbstractCegarLoop]: Abstraction has 196 states and 243 transitions. [2022-01-31 18:20:42,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 3.893617021276596) internal successors, (183), 46 states have internal predecessors, (183), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 243 transitions. [2022-01-31 18:20:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2022-01-31 18:20:42,648 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:42,648 INFO L514 BasicCegarLoop]: trace histogram [44, 44, 44, 44, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:42,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 18:20:42,648 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:42,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:42,649 INFO L85 PathProgramCache]: Analyzing trace with hash -1041539525, now seen corresponding path program 44 times [2022-01-31 18:20:42,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:42,649 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [179227165] [2022-01-31 18:20:42,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:42,656 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:42,656 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:42,656 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:42,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:42,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:43,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:43,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:43,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:43,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:43,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [179227165] [2022-01-31 18:20:43,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [179227165] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:43,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:43,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 18:20:43,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115573894] [2022-01-31 18:20:43,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:43,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 18:20:43,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:43,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 18:20:43,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1083, Invalid=1173, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 18:20:43,623 INFO L87 Difference]: Start difference. First operand 196 states and 243 transitions. Second operand has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 47 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:44,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:44,152 INFO L93 Difference]: Finished difference Result 486 states and 673 transitions. [2022-01-31 18:20:44,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 18:20:44,152 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 47 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 191 [2022-01-31 18:20:44,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:44,154 INFO L225 Difference]: With dead ends: 486 [2022-01-31 18:20:44,154 INFO L226 Difference]: Without dead ends: 473 [2022-01-31 18:20:44,154 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1131, Invalid=1221, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:20:44,155 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 1092 mSDsluCounter, 376 mSDsCounter, 0 mSdLazyCounter, 485 mSolverCounterSat, 302 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1137 SdHoareTripleChecker+Valid, 442 SdHoareTripleChecker+Invalid, 787 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 302 IncrementalHoareTripleChecker+Valid, 485 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:44,155 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1137 Valid, 442 Invalid, 787 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [302 Valid, 485 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:44,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 473 states. [2022-01-31 18:20:44,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 473 to 200. [2022-01-31 18:20:44,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 194 states have (on average 1.2525773195876289) internal successors, (243), 194 states have internal predecessors, (243), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:44,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 248 transitions. [2022-01-31 18:20:44,167 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 248 transitions. Word has length 191 [2022-01-31 18:20:44,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:44,168 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 248 transitions. [2022-01-31 18:20:44,168 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.8958333333333335) internal successors, (187), 47 states have internal predecessors, (187), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:44,168 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 248 transitions. [2022-01-31 18:20:44,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 196 [2022-01-31 18:20:44,169 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:44,169 INFO L514 BasicCegarLoop]: trace histogram [45, 45, 45, 45, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:44,169 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 18:20:44,169 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:44,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:44,169 INFO L85 PathProgramCache]: Analyzing trace with hash -946123914, now seen corresponding path program 45 times [2022-01-31 18:20:44,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:44,170 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1880733131] [2022-01-31 18:20:44,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:44,180 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:44,180 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:44,180 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:44,188 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:44,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:45,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1880733131] [2022-01-31 18:20:45,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1880733131] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:45,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:45,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 18:20:45,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723218984] [2022-01-31 18:20:45,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:45,102 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 18:20:45,102 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:45,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 18:20:45,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1130, Invalid=1222, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 18:20:45,103 INFO L87 Difference]: Start difference. First operand 200 states and 248 transitions. Second operand has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:45,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:45,669 INFO L93 Difference]: Finished difference Result 496 states and 687 transitions. [2022-01-31 18:20:45,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 18:20:45,670 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 195 [2022-01-31 18:20:45,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:45,672 INFO L225 Difference]: With dead ends: 496 [2022-01-31 18:20:45,672 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 18:20:45,672 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1179, Invalid=1271, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:20:45,672 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 1393 mSDsluCounter, 354 mSDsCounter, 0 mSdLazyCounter, 446 mSolverCounterSat, 396 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1439 SdHoareTripleChecker+Valid, 421 SdHoareTripleChecker+Invalid, 842 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 396 IncrementalHoareTripleChecker+Valid, 446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:45,673 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1439 Valid, 421 Invalid, 842 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [396 Valid, 446 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:45,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 18:20:45,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 204. [2022-01-31 18:20:45,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 198 states have (on average 1.2525252525252526) internal successors, (248), 198 states have internal predecessors, (248), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 253 transitions. [2022-01-31 18:20:45,681 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 253 transitions. Word has length 195 [2022-01-31 18:20:45,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:45,681 INFO L470 AbstractCegarLoop]: Abstraction has 204 states and 253 transitions. [2022-01-31 18:20:45,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.8979591836734695) internal successors, (191), 48 states have internal predecessors, (191), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:45,681 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 253 transitions. [2022-01-31 18:20:45,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2022-01-31 18:20:45,682 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:45,682 INFO L514 BasicCegarLoop]: trace histogram [46, 46, 46, 46, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:45,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 18:20:45,683 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:45,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:45,683 INFO L85 PathProgramCache]: Analyzing trace with hash 1825317681, now seen corresponding path program 46 times [2022-01-31 18:20:45,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:45,683 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1284185011] [2022-01-31 18:20:45,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:45,687 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:45,687 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:45,687 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:45,694 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:45,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:46,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:46,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:46,673 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:46,673 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:46,673 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1284185011] [2022-01-31 18:20:46,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1284185011] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:46,673 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:46,673 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 18:20:46,673 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312296400] [2022-01-31 18:20:46,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:46,674 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 18:20:46,674 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:46,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 18:20:46,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1178, Invalid=1272, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 18:20:46,675 INFO L87 Difference]: Start difference. First operand 204 states and 253 transitions. Second operand has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:47,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:47,263 INFO L93 Difference]: Finished difference Result 506 states and 701 transitions. [2022-01-31 18:20:47,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 18:20:47,263 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 199 [2022-01-31 18:20:47,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:47,265 INFO L225 Difference]: With dead ends: 506 [2022-01-31 18:20:47,265 INFO L226 Difference]: Without dead ends: 493 [2022-01-31 18:20:47,265 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1228, Invalid=1322, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:20:47,265 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 1367 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 384 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1414 SdHoareTripleChecker+Valid, 447 SdHoareTripleChecker+Invalid, 909 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 384 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:47,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1414 Valid, 447 Invalid, 909 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [384 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:47,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2022-01-31 18:20:47,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 208. [2022-01-31 18:20:47,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 202 states have (on average 1.2524752475247525) internal successors, (253), 202 states have internal predecessors, (253), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:47,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 258 transitions. [2022-01-31 18:20:47,274 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 258 transitions. Word has length 199 [2022-01-31 18:20:47,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:47,274 INFO L470 AbstractCegarLoop]: Abstraction has 208 states and 258 transitions. [2022-01-31 18:20:47,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 3.9) internal successors, (195), 49 states have internal predecessors, (195), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:47,275 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 258 transitions. [2022-01-31 18:20:47,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2022-01-31 18:20:47,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:47,275 INFO L514 BasicCegarLoop]: trace histogram [47, 47, 47, 47, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:47,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 18:20:47,276 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:47,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:47,276 INFO L85 PathProgramCache]: Analyzing trace with hash -637229716, now seen corresponding path program 47 times [2022-01-31 18:20:47,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:47,276 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [747398521] [2022-01-31 18:20:47,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:47,287 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:47,287 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:47,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:47,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:47,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:48,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:48,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:48,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:48,324 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:48,324 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [747398521] [2022-01-31 18:20:48,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [747398521] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:48,324 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:48,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 18:20:48,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527839787] [2022-01-31 18:20:48,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:48,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 18:20:48,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:48,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 18:20:48,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1227, Invalid=1323, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 18:20:48,325 INFO L87 Difference]: Start difference. First operand 208 states and 258 transitions. Second operand has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 50 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:48,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:48,933 INFO L93 Difference]: Finished difference Result 516 states and 715 transitions. [2022-01-31 18:20:48,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 18:20:48,934 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 50 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 203 [2022-01-31 18:20:48,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:48,935 INFO L225 Difference]: With dead ends: 516 [2022-01-31 18:20:48,935 INFO L226 Difference]: Without dead ends: 503 [2022-01-31 18:20:48,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1278, Invalid=1374, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:20:48,936 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 963 mSDsluCounter, 412 mSDsCounter, 0 mSdLazyCounter, 595 mSolverCounterSat, 253 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1011 SdHoareTripleChecker+Valid, 481 SdHoareTripleChecker+Invalid, 848 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 253 IncrementalHoareTripleChecker+Valid, 595 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:48,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1011 Valid, 481 Invalid, 848 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [253 Valid, 595 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:48,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2022-01-31 18:20:48,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 212. [2022-01-31 18:20:48,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 206 states have (on average 1.2524271844660195) internal successors, (258), 206 states have internal predecessors, (258), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 263 transitions. [2022-01-31 18:20:48,945 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 263 transitions. Word has length 203 [2022-01-31 18:20:48,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:48,946 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 263 transitions. [2022-01-31 18:20:48,946 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.9019607843137254) internal successors, (199), 50 states have internal predecessors, (199), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:48,946 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 263 transitions. [2022-01-31 18:20:48,947 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 208 [2022-01-31 18:20:48,947 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:48,947 INFO L514 BasicCegarLoop]: trace histogram [48, 48, 48, 48, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:48,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 18:20:48,949 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:48,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:48,949 INFO L85 PathProgramCache]: Analyzing trace with hash 376148519, now seen corresponding path program 48 times [2022-01-31 18:20:48,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:48,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234838137] [2022-01-31 18:20:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:48,952 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:48,953 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:48,953 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:48,960 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:49,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:50,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:50,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:50,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:50,036 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:50,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234838137] [2022-01-31 18:20:50,036 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234838137] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:50,036 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:50,037 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 18:20:50,037 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915411747] [2022-01-31 18:20:50,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:50,037 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 18:20:50,037 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:50,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 18:20:50,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1277, Invalid=1375, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 18:20:50,038 INFO L87 Difference]: Start difference. First operand 212 states and 263 transitions. Second operand has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 51 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:50,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:50,646 INFO L93 Difference]: Finished difference Result 526 states and 729 transitions. [2022-01-31 18:20:50,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 18:20:50,647 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 51 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 207 [2022-01-31 18:20:50,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:50,649 INFO L225 Difference]: With dead ends: 526 [2022-01-31 18:20:50,649 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 18:20:50,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1329, Invalid=1427, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:20:50,649 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 1248 mSDsluCounter, 392 mSDsCounter, 0 mSdLazyCounter, 531 mSolverCounterSat, 346 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1297 SdHoareTripleChecker+Valid, 462 SdHoareTripleChecker+Invalid, 877 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 346 IncrementalHoareTripleChecker+Valid, 531 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:50,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1297 Valid, 462 Invalid, 877 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [346 Valid, 531 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 18:20:50,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 18:20:50,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 216. [2022-01-31 18:20:50,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 210 states have (on average 1.2523809523809524) internal successors, (263), 210 states have internal predecessors, (263), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:50,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 268 transitions. [2022-01-31 18:20:50,658 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 268 transitions. Word has length 207 [2022-01-31 18:20:50,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:50,658 INFO L470 AbstractCegarLoop]: Abstraction has 216 states and 268 transitions. [2022-01-31 18:20:50,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.9038461538461537) internal successors, (203), 51 states have internal predecessors, (203), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:50,658 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 268 transitions. [2022-01-31 18:20:50,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2022-01-31 18:20:50,659 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:50,659 INFO L514 BasicCegarLoop]: trace histogram [49, 49, 49, 49, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:50,659 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 18:20:50,659 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:50,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:50,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1211651742, now seen corresponding path program 49 times [2022-01-31 18:20:50,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:50,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [631071185] [2022-01-31 18:20:50,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:50,666 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:50,666 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:50,666 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:50,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:51,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:51,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:51,813 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:51,813 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [631071185] [2022-01-31 18:20:51,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [631071185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:51,813 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:51,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [53] imperfect sequences [] total 53 [2022-01-31 18:20:51,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196499059] [2022-01-31 18:20:51,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:51,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2022-01-31 18:20:51,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:51,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2022-01-31 18:20:51,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1328, Invalid=1428, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 18:20:51,815 INFO L87 Difference]: Start difference. First operand 216 states and 268 transitions. Second operand has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:52,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:52,497 INFO L93 Difference]: Finished difference Result 536 states and 743 transitions. [2022-01-31 18:20:52,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 18:20:52,498 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 211 [2022-01-31 18:20:52,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:52,500 INFO L225 Difference]: With dead ends: 536 [2022-01-31 18:20:52,500 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 18:20:52,500 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1381, Invalid=1481, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:20:52,501 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 1098 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 664 mSolverCounterSat, 293 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1148 SdHoareTripleChecker+Valid, 493 SdHoareTripleChecker+Invalid, 957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 293 IncrementalHoareTripleChecker+Valid, 664 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:52,501 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1148 Valid, 493 Invalid, 957 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [293 Valid, 664 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:20:52,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 18:20:52,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 220. [2022-01-31 18:20:52,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 214 states have (on average 1.2523364485981308) internal successors, (268), 214 states have internal predecessors, (268), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:52,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 273 transitions. [2022-01-31 18:20:52,509 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 273 transitions. Word has length 211 [2022-01-31 18:20:52,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:52,510 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 273 transitions. [2022-01-31 18:20:52,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 3.9056603773584904) internal successors, (207), 52 states have internal predecessors, (207), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:52,510 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 273 transitions. [2022-01-31 18:20:52,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2022-01-31 18:20:52,511 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:52,511 INFO L514 BasicCegarLoop]: trace histogram [50, 50, 50, 50, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:52,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 18:20:52,511 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:52,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:52,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1837126883, now seen corresponding path program 50 times [2022-01-31 18:20:52,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:52,512 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1345487097] [2022-01-31 18:20:52,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:52,515 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:52,515 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:52,515 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:52,524 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:52,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:53,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:53,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:53,661 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:53,661 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1345487097] [2022-01-31 18:20:53,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1345487097] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:53,661 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:53,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [54] imperfect sequences [] total 54 [2022-01-31 18:20:53,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245597778] [2022-01-31 18:20:53,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:53,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2022-01-31 18:20:53,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2022-01-31 18:20:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1380, Invalid=1482, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 18:20:53,663 INFO L87 Difference]: Start difference. First operand 220 states and 273 transitions. Second operand has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 53 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:54,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:54,364 INFO L93 Difference]: Finished difference Result 546 states and 757 transitions. [2022-01-31 18:20:54,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 18:20:54,364 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 53 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 215 [2022-01-31 18:20:54,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:54,366 INFO L225 Difference]: With dead ends: 546 [2022-01-31 18:20:54,366 INFO L226 Difference]: Without dead ends: 533 [2022-01-31 18:20:54,367 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1434, Invalid=1536, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:20:54,367 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 999 mSDsluCounter, 427 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 260 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1050 SdHoareTripleChecker+Valid, 499 SdHoareTripleChecker+Invalid, 862 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 260 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:54,367 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1050 Valid, 499 Invalid, 862 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [260 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:20:54,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 533 states. [2022-01-31 18:20:54,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 533 to 224. [2022-01-31 18:20:54,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 218 states have (on average 1.2522935779816513) internal successors, (273), 218 states have internal predecessors, (273), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:54,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 278 transitions. [2022-01-31 18:20:54,377 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 278 transitions. Word has length 215 [2022-01-31 18:20:54,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:54,378 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 278 transitions. [2022-01-31 18:20:54,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.9074074074074074) internal successors, (211), 53 states have internal predecessors, (211), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:54,378 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 278 transitions. [2022-01-31 18:20:54,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2022-01-31 18:20:54,379 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:54,379 INFO L514 BasicCegarLoop]: trace histogram [51, 51, 51, 51, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:54,379 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 18:20:54,379 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:54,379 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:54,380 INFO L85 PathProgramCache]: Analyzing trace with hash 1771722584, now seen corresponding path program 51 times [2022-01-31 18:20:54,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:54,380 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1964890159] [2022-01-31 18:20:54,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:54,383 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:54,383 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:54,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:54,392 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:54,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:55,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:55,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:55,572 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:55,572 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1964890159] [2022-01-31 18:20:55,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1964890159] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:55,572 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:55,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [55] imperfect sequences [] total 55 [2022-01-31 18:20:55,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201841933] [2022-01-31 18:20:55,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:55,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2022-01-31 18:20:55,573 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:55,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2022-01-31 18:20:55,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1433, Invalid=1537, Unknown=0, NotChecked=0, Total=2970 [2022-01-31 18:20:55,574 INFO L87 Difference]: Start difference. First operand 224 states and 278 transitions. Second operand has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 54 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:56,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:56,251 INFO L93 Difference]: Finished difference Result 556 states and 771 transitions. [2022-01-31 18:20:56,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 18:20:56,252 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 54 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 219 [2022-01-31 18:20:56,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:56,253 INFO L225 Difference]: With dead ends: 556 [2022-01-31 18:20:56,253 INFO L226 Difference]: Without dead ends: 543 [2022-01-31 18:20:56,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1488, Invalid=1592, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:20:56,256 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 1121 mSDsluCounter, 433 mSDsCounter, 0 mSdLazyCounter, 580 mSolverCounterSat, 301 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1173 SdHoareTripleChecker+Valid, 506 SdHoareTripleChecker+Invalid, 881 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 301 IncrementalHoareTripleChecker+Valid, 580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:56,256 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1173 Valid, 506 Invalid, 881 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [301 Valid, 580 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:20:56,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2022-01-31 18:20:56,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 228. [2022-01-31 18:20:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 228 states, 222 states have (on average 1.2522522522522523) internal successors, (278), 222 states have internal predecessors, (278), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:56,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 228 states to 228 states and 283 transitions. [2022-01-31 18:20:56,269 INFO L78 Accepts]: Start accepts. Automaton has 228 states and 283 transitions. Word has length 219 [2022-01-31 18:20:56,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:56,269 INFO L470 AbstractCegarLoop]: Abstraction has 228 states and 283 transitions. [2022-01-31 18:20:56,269 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.909090909090909) internal successors, (215), 54 states have internal predecessors, (215), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:56,269 INFO L276 IsEmpty]: Start isEmpty. Operand 228 states and 283 transitions. [2022-01-31 18:20:56,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 224 [2022-01-31 18:20:56,273 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:56,274 INFO L514 BasicCegarLoop]: trace histogram [52, 52, 52, 52, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:56,274 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 18:20:56,274 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:56,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:56,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1631687149, now seen corresponding path program 52 times [2022-01-31 18:20:56,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:56,274 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [51516355] [2022-01-31 18:20:56,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:56,278 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:56,278 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:56,278 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:56,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:56,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:57,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:57,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:57,498 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:57,498 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [51516355] [2022-01-31 18:20:57,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [51516355] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:57,498 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:57,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [56] imperfect sequences [] total 56 [2022-01-31 18:20:57,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378160353] [2022-01-31 18:20:57,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:57,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2022-01-31 18:20:57,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:57,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2022-01-31 18:20:57,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1487, Invalid=1593, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 18:20:57,500 INFO L87 Difference]: Start difference. First operand 228 states and 283 transitions. Second operand has 56 states, 56 states have (on average 3.9107142857142856) internal successors, (219), 55 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:20:58,277 INFO L93 Difference]: Finished difference Result 566 states and 785 transitions. [2022-01-31 18:20:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 18:20:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 3.9107142857142856) internal successors, (219), 55 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 223 [2022-01-31 18:20:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:20:58,280 INFO L225 Difference]: With dead ends: 566 [2022-01-31 18:20:58,280 INFO L226 Difference]: Without dead ends: 553 [2022-01-31 18:20:58,280 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1543, Invalid=1649, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:20:58,281 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 1532 mSDsluCounter, 414 mSDsCounter, 0 mSdLazyCounter, 530 mSolverCounterSat, 433 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1585 SdHoareTripleChecker+Valid, 488 SdHoareTripleChecker+Invalid, 963 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 433 IncrementalHoareTripleChecker+Valid, 530 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:20:58,281 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1585 Valid, 488 Invalid, 963 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [433 Valid, 530 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:20:58,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 553 states. [2022-01-31 18:20:58,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 553 to 232. [2022-01-31 18:20:58,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 226 states have (on average 1.252212389380531) internal successors, (283), 226 states have internal predecessors, (283), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:20:58,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 288 transitions. [2022-01-31 18:20:58,289 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 288 transitions. Word has length 223 [2022-01-31 18:20:58,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:20:58,290 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 288 transitions. [2022-01-31 18:20:58,290 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 3.9107142857142856) internal successors, (219), 55 states have internal predecessors, (219), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:20:58,290 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 288 transitions. [2022-01-31 18:20:58,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 228 [2022-01-31 18:20:58,291 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:20:58,291 INFO L514 BasicCegarLoop]: trace histogram [53, 53, 53, 53, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:20:58,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 18:20:58,291 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:20:58,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:20:58,292 INFO L85 PathProgramCache]: Analyzing trace with hash -499994802, now seen corresponding path program 53 times [2022-01-31 18:20:58,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:20:58,292 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [635606339] [2022-01-31 18:20:58,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:20:58,295 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:20:58,295 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:20:58,295 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:20:58,304 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:20:58,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:59,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:20:59,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:20:59,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:20:59,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:20:59,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [635606339] [2022-01-31 18:20:59,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [635606339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:20:59,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:20:59,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [57] imperfect sequences [] total 57 [2022-01-31 18:20:59,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [187833651] [2022-01-31 18:20:59,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:20:59,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2022-01-31 18:20:59,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:20:59,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2022-01-31 18:20:59,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1542, Invalid=1650, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 18:20:59,525 INFO L87 Difference]: Start difference. First operand 232 states and 288 transitions. Second operand has 57 states, 57 states have (on average 3.912280701754386) internal successors, (223), 56 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:00,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:00,274 INFO L93 Difference]: Finished difference Result 576 states and 799 transitions. [2022-01-31 18:21:00,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 18:21:00,274 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.912280701754386) internal successors, (223), 56 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 227 [2022-01-31 18:21:00,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:00,276 INFO L225 Difference]: With dead ends: 576 [2022-01-31 18:21:00,276 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 18:21:00,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1599, Invalid=1707, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:21:00,277 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 1342 mSDsluCounter, 428 mSDsCounter, 0 mSdLazyCounter, 582 mSolverCounterSat, 368 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1396 SdHoareTripleChecker+Valid, 503 SdHoareTripleChecker+Invalid, 950 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 368 IncrementalHoareTripleChecker+Valid, 582 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:00,277 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1396 Valid, 503 Invalid, 950 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [368 Valid, 582 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:21:00,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 18:21:00,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 236. [2022-01-31 18:21:00,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 230 states have (on average 1.2521739130434784) internal successors, (288), 230 states have internal predecessors, (288), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:00,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 293 transitions. [2022-01-31 18:21:00,285 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 293 transitions. Word has length 227 [2022-01-31 18:21:00,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:00,286 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 293 transitions. [2022-01-31 18:21:00,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.912280701754386) internal successors, (223), 56 states have internal predecessors, (223), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:00,286 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 293 transitions. [2022-01-31 18:21:00,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2022-01-31 18:21:00,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:00,287 INFO L514 BasicCegarLoop]: trace histogram [54, 54, 54, 54, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:00,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 18:21:00,287 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:00,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:00,288 INFO L85 PathProgramCache]: Analyzing trace with hash -488776951, now seen corresponding path program 54 times [2022-01-31 18:21:00,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:00,288 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1771635287] [2022-01-31 18:21:00,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:00,291 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:00,291 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:00,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:00,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:00,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:01,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:01,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:01,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:01,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:01,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1771635287] [2022-01-31 18:21:01,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1771635287] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:01,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:01,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [58] imperfect sequences [] total 58 [2022-01-31 18:21:01,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476093193] [2022-01-31 18:21:01,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:01,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2022-01-31 18:21:01,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:01,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2022-01-31 18:21:01,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1598, Invalid=1708, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 18:21:01,517 INFO L87 Difference]: Start difference. First operand 236 states and 293 transitions. Second operand has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 57 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:02,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:02,258 INFO L93 Difference]: Finished difference Result 586 states and 813 transitions. [2022-01-31 18:21:02,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 18:21:02,259 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 57 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 231 [2022-01-31 18:21:02,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:02,261 INFO L225 Difference]: With dead ends: 586 [2022-01-31 18:21:02,261 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 18:21:02,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1656, Invalid=1766, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:21:02,262 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 1517 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 594 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1572 SdHoareTripleChecker+Valid, 523 SdHoareTripleChecker+Invalid, 1021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 594 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:02,262 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1572 Valid, 523 Invalid, 1021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 594 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:21:02,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 18:21:02,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 240. [2022-01-31 18:21:02,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 234 states have (on average 1.2521367521367521) internal successors, (293), 234 states have internal predecessors, (293), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:02,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 298 transitions. [2022-01-31 18:21:02,271 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 298 transitions. Word has length 231 [2022-01-31 18:21:02,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:02,271 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 298 transitions. [2022-01-31 18:21:02,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 3.913793103448276) internal successors, (227), 57 states have internal predecessors, (227), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:02,271 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 298 transitions. [2022-01-31 18:21:02,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 236 [2022-01-31 18:21:02,272 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:02,273 INFO L514 BasicCegarLoop]: trace histogram [55, 55, 55, 55, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:02,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 18:21:02,273 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:02,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:02,273 INFO L85 PathProgramCache]: Analyzing trace with hash -28921532, now seen corresponding path program 55 times [2022-01-31 18:21:02,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:02,273 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [426137180] [2022-01-31 18:21:02,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:02,279 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:02,279 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:02,279 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:02,289 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:03,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:03,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:03,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:03,552 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:03,552 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [426137180] [2022-01-31 18:21:03,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [426137180] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:03,552 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:03,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [59] imperfect sequences [] total 59 [2022-01-31 18:21:03,552 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978536247] [2022-01-31 18:21:03,552 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:03,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2022-01-31 18:21:03,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:03,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2022-01-31 18:21:03,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1655, Invalid=1767, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 18:21:03,554 INFO L87 Difference]: Start difference. First operand 240 states and 298 transitions. Second operand has 59 states, 59 states have (on average 3.9152542372881354) internal successors, (231), 58 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:04,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:04,299 INFO L93 Difference]: Finished difference Result 596 states and 827 transitions. [2022-01-31 18:21:04,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 18:21:04,299 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 3.9152542372881354) internal successors, (231), 58 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 235 [2022-01-31 18:21:04,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:04,301 INFO L225 Difference]: With dead ends: 596 [2022-01-31 18:21:04,301 INFO L226 Difference]: Without dead ends: 583 [2022-01-31 18:21:04,301 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1714, Invalid=1826, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:21:04,302 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 1473 mSDsluCounter, 447 mSDsCounter, 0 mSdLazyCounter, 605 mSolverCounterSat, 410 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1529 SdHoareTripleChecker+Valid, 524 SdHoareTripleChecker+Invalid, 1015 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 410 IncrementalHoareTripleChecker+Valid, 605 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:04,302 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1529 Valid, 524 Invalid, 1015 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [410 Valid, 605 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:21:04,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 583 states. [2022-01-31 18:21:04,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 583 to 244. [2022-01-31 18:21:04,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 238 states have (on average 1.2521008403361344) internal successors, (298), 238 states have internal predecessors, (298), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:04,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 303 transitions. [2022-01-31 18:21:04,311 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 303 transitions. Word has length 235 [2022-01-31 18:21:04,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:04,311 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 303 transitions. [2022-01-31 18:21:04,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 3.9152542372881354) internal successors, (231), 58 states have internal predecessors, (231), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:04,312 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 303 transitions. [2022-01-31 18:21:04,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2022-01-31 18:21:04,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:04,313 INFO L514 BasicCegarLoop]: trace histogram [56, 56, 56, 56, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:04,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 18:21:04,313 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:04,313 INFO L85 PathProgramCache]: Analyzing trace with hash -258739713, now seen corresponding path program 56 times [2022-01-31 18:21:04,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:04,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [161825121] [2022-01-31 18:21:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:04,318 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:04,318 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:04,318 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:04,328 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:05,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:05,629 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:05,629 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [161825121] [2022-01-31 18:21:05,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [161825121] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:05,629 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:05,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [60] imperfect sequences [] total 60 [2022-01-31 18:21:05,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383006785] [2022-01-31 18:21:05,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:05,630 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2022-01-31 18:21:05,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:05,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2022-01-31 18:21:05,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1713, Invalid=1827, Unknown=0, NotChecked=0, Total=3540 [2022-01-31 18:21:05,631 INFO L87 Difference]: Start difference. First operand 244 states and 303 transitions. Second operand has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 59 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:06,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:06,455 INFO L93 Difference]: Finished difference Result 606 states and 841 transitions. [2022-01-31 18:21:06,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 18:21:06,455 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 59 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 239 [2022-01-31 18:21:06,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:06,458 INFO L225 Difference]: With dead ends: 606 [2022-01-31 18:21:06,458 INFO L226 Difference]: Without dead ends: 593 [2022-01-31 18:21:06,458 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1773, Invalid=1887, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:21:06,458 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 1922 mSDsluCounter, 431 mSDsCounter, 0 mSdLazyCounter, 532 mSolverCounterSat, 558 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1979 SdHoareTripleChecker+Valid, 509 SdHoareTripleChecker+Invalid, 1090 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 558 IncrementalHoareTripleChecker+Valid, 532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:06,459 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1979 Valid, 509 Invalid, 1090 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [558 Valid, 532 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:21:06,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 593 states. [2022-01-31 18:21:06,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 593 to 248. [2022-01-31 18:21:06,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 242 states have (on average 1.2520661157024793) internal successors, (303), 242 states have internal predecessors, (303), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:06,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 308 transitions. [2022-01-31 18:21:06,468 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 308 transitions. Word has length 239 [2022-01-31 18:21:06,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:06,468 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 308 transitions. [2022-01-31 18:21:06,468 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.9166666666666665) internal successors, (235), 59 states have internal predecessors, (235), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:06,469 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 308 transitions. [2022-01-31 18:21:06,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2022-01-31 18:21:06,470 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:06,470 INFO L514 BasicCegarLoop]: trace histogram [57, 57, 57, 57, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:06,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 18:21:06,470 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:06,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:06,470 INFO L85 PathProgramCache]: Analyzing trace with hash -2071175878, now seen corresponding path program 57 times [2022-01-31 18:21:06,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:06,471 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1300447151] [2022-01-31 18:21:06,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:06,474 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:06,474 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:06,474 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:06,485 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:06,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:07,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:07,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:07,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:07,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:07,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1300447151] [2022-01-31 18:21:07,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1300447151] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:07,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:07,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [61] imperfect sequences [] total 61 [2022-01-31 18:21:07,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279737840] [2022-01-31 18:21:07,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:07,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2022-01-31 18:21:07,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:07,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2022-01-31 18:21:07,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1772, Invalid=1888, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 18:21:07,825 INFO L87 Difference]: Start difference. First operand 248 states and 308 transitions. Second operand has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 60 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:08,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:08,679 INFO L93 Difference]: Finished difference Result 616 states and 855 transitions. [2022-01-31 18:21:08,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 18:21:08,680 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 60 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 243 [2022-01-31 18:21:08,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:08,682 INFO L225 Difference]: With dead ends: 616 [2022-01-31 18:21:08,682 INFO L226 Difference]: Without dead ends: 603 [2022-01-31 18:21:08,682 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1833, Invalid=1949, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:21:08,683 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 1999 mSDsluCounter, 449 mSDsCounter, 0 mSdLazyCounter, 566 mSolverCounterSat, 586 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2057 SdHoareTripleChecker+Valid, 528 SdHoareTripleChecker+Invalid, 1152 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 586 IncrementalHoareTripleChecker+Valid, 566 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:08,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2057 Valid, 528 Invalid, 1152 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [586 Valid, 566 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:08,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 603 states. [2022-01-31 18:21:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 603 to 252. [2022-01-31 18:21:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 246 states have (on average 1.2520325203252032) internal successors, (308), 246 states have internal predecessors, (308), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 313 transitions. [2022-01-31 18:21:08,691 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 313 transitions. Word has length 243 [2022-01-31 18:21:08,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:08,692 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 313 transitions. [2022-01-31 18:21:08,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 3.918032786885246) internal successors, (239), 60 states have internal predecessors, (239), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 313 transitions. [2022-01-31 18:21:08,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 248 [2022-01-31 18:21:08,693 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:08,693 INFO L514 BasicCegarLoop]: trace histogram [58, 58, 58, 58, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:08,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 18:21:08,693 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:08,694 INFO L85 PathProgramCache]: Analyzing trace with hash 1133949685, now seen corresponding path program 58 times [2022-01-31 18:21:08,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:08,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [553850938] [2022-01-31 18:21:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:08,704 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:08,704 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:08,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:08,714 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:08,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:10,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:10,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:10,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:10,113 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:10,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [553850938] [2022-01-31 18:21:10,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [553850938] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:10,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:10,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [62] imperfect sequences [] total 62 [2022-01-31 18:21:10,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950732907] [2022-01-31 18:21:10,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:10,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2022-01-31 18:21:10,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:10,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2022-01-31 18:21:10,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1832, Invalid=1950, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 18:21:10,115 INFO L87 Difference]: Start difference. First operand 252 states and 313 transitions. Second operand has 62 states, 62 states have (on average 3.9193548387096775) internal successors, (243), 61 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:10,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:10,986 INFO L93 Difference]: Finished difference Result 626 states and 869 transitions. [2022-01-31 18:21:10,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 18:21:10,987 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 3.9193548387096775) internal successors, (243), 61 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 247 [2022-01-31 18:21:10,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:10,989 INFO L225 Difference]: With dead ends: 626 [2022-01-31 18:21:10,989 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 18:21:10,990 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1894, Invalid=2012, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:21:10,990 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 1652 mSDsluCounter, 492 mSDsCounter, 0 mSdLazyCounter, 635 mSolverCounterSat, 464 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1711 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 1099 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 464 IncrementalHoareTripleChecker+Valid, 635 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:10,991 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1711 Valid, 572 Invalid, 1099 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [464 Valid, 635 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 18:21:10,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 18:21:11,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 256. [2022-01-31 18:21:11,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 250 states have (on average 1.252) internal successors, (313), 250 states have internal predecessors, (313), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 318 transitions. [2022-01-31 18:21:11,001 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 318 transitions. Word has length 247 [2022-01-31 18:21:11,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:11,002 INFO L470 AbstractCegarLoop]: Abstraction has 256 states and 318 transitions. [2022-01-31 18:21:11,002 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 3.9193548387096775) internal successors, (243), 61 states have internal predecessors, (243), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:11,002 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 318 transitions. [2022-01-31 18:21:11,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2022-01-31 18:21:11,003 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:11,003 INFO L514 BasicCegarLoop]: trace histogram [59, 59, 59, 59, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:11,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 18:21:11,004 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:11,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:11,004 INFO L85 PathProgramCache]: Analyzing trace with hash 632927024, now seen corresponding path program 59 times [2022-01-31 18:21:11,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:11,004 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1617928254] [2022-01-31 18:21:11,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:11,007 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:11,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:11,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:11,017 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:11,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:12,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:12,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:12,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:12,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1617928254] [2022-01-31 18:21:12,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1617928254] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:12,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:12,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [63] imperfect sequences [] total 63 [2022-01-31 18:21:12,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021654143] [2022-01-31 18:21:12,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:12,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2022-01-31 18:21:12,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:12,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2022-01-31 18:21:12,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1893, Invalid=2013, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 18:21:12,449 INFO L87 Difference]: Start difference. First operand 256 states and 318 transitions. Second operand has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 62 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:13,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:13,370 INFO L93 Difference]: Finished difference Result 636 states and 883 transitions. [2022-01-31 18:21:13,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 18:21:13,370 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 62 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 251 [2022-01-31 18:21:13,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:13,373 INFO L225 Difference]: With dead ends: 636 [2022-01-31 18:21:13,373 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 18:21:13,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1956, Invalid=2076, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:21:13,373 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 1606 mSDsluCounter, 503 mSDsCounter, 0 mSdLazyCounter, 639 mSolverCounterSat, 455 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1666 SdHoareTripleChecker+Valid, 584 SdHoareTripleChecker+Invalid, 1094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 455 IncrementalHoareTripleChecker+Valid, 639 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:13,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1666 Valid, 584 Invalid, 1094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [455 Valid, 639 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:13,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 18:21:13,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 260. [2022-01-31 18:21:13,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 254 states have (on average 1.2519685039370079) internal successors, (318), 254 states have internal predecessors, (318), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:13,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 323 transitions. [2022-01-31 18:21:13,382 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 323 transitions. Word has length 251 [2022-01-31 18:21:13,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:13,383 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 323 transitions. [2022-01-31 18:21:13,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.9206349206349205) internal successors, (247), 62 states have internal predecessors, (247), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:13,383 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 323 transitions. [2022-01-31 18:21:13,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 256 [2022-01-31 18:21:13,384 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:13,384 INFO L514 BasicCegarLoop]: trace histogram [60, 60, 60, 60, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:13,384 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 18:21:13,384 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:13,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:13,385 INFO L85 PathProgramCache]: Analyzing trace with hash 1100750315, now seen corresponding path program 60 times [2022-01-31 18:21:13,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:13,385 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [176140674] [2022-01-31 18:21:13,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:13,396 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:13,397 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:13,397 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:13,407 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:13,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:14,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:14,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:14,940 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:14,941 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:14,941 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [176140674] [2022-01-31 18:21:14,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [176140674] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:14,941 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:14,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [64] imperfect sequences [] total 64 [2022-01-31 18:21:14,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2108575329] [2022-01-31 18:21:14,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:14,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2022-01-31 18:21:14,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:14,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2022-01-31 18:21:14,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1955, Invalid=2077, Unknown=0, NotChecked=0, Total=4032 [2022-01-31 18:21:14,943 INFO L87 Difference]: Start difference. First operand 260 states and 323 transitions. Second operand has 64 states, 64 states have (on average 3.921875) internal successors, (251), 63 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:16,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:16,029 INFO L93 Difference]: Finished difference Result 646 states and 897 transitions. [2022-01-31 18:21:16,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 18:21:16,030 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.921875) internal successors, (251), 63 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 255 [2022-01-31 18:21:16,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:16,032 INFO L225 Difference]: With dead ends: 646 [2022-01-31 18:21:16,032 INFO L226 Difference]: Without dead ends: 633 [2022-01-31 18:21:16,033 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2019, Invalid=2141, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:21:16,033 INFO L933 BasicCegarLoop]: 82 mSDtfsCounter, 1724 mSDsluCounter, 463 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 483 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1785 SdHoareTripleChecker+Valid, 545 SdHoareTripleChecker+Invalid, 1082 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 483 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:16,033 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1785 Valid, 545 Invalid, 1082 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [483 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:16,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 633 states. [2022-01-31 18:21:16,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 633 to 264. [2022-01-31 18:21:16,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 258 states have (on average 1.251937984496124) internal successors, (323), 258 states have internal predecessors, (323), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:16,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 328 transitions. [2022-01-31 18:21:16,043 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 328 transitions. Word has length 255 [2022-01-31 18:21:16,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:16,043 INFO L470 AbstractCegarLoop]: Abstraction has 264 states and 328 transitions. [2022-01-31 18:21:16,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.921875) internal successors, (251), 63 states have internal predecessors, (251), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:16,044 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 328 transitions. [2022-01-31 18:21:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2022-01-31 18:21:16,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:16,045 INFO L514 BasicCegarLoop]: trace histogram [61, 61, 61, 61, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:16,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 18:21:16,045 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:16,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:16,045 INFO L85 PathProgramCache]: Analyzing trace with hash 2089071398, now seen corresponding path program 61 times [2022-01-31 18:21:16,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:16,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1027249454] [2022-01-31 18:21:16,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:16,049 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:16,049 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:16,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:16,064 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:16,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:17,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:17,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:17,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:17,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:17,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1027249454] [2022-01-31 18:21:17,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1027249454] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:17,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:17,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [65] imperfect sequences [] total 65 [2022-01-31 18:21:17,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067386062] [2022-01-31 18:21:17,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:17,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2022-01-31 18:21:17,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:17,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2022-01-31 18:21:17,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2018, Invalid=2142, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 18:21:17,634 INFO L87 Difference]: Start difference. First operand 264 states and 328 transitions. Second operand has 65 states, 65 states have (on average 3.923076923076923) internal successors, (255), 64 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:18,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:18,626 INFO L93 Difference]: Finished difference Result 656 states and 911 transitions. [2022-01-31 18:21:18,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 18:21:18,626 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.923076923076923) internal successors, (255), 64 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 259 [2022-01-31 18:21:18,626 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:18,628 INFO L225 Difference]: With dead ends: 656 [2022-01-31 18:21:18,628 INFO L226 Difference]: Without dead ends: 643 [2022-01-31 18:21:18,629 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2083, Invalid=2207, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:21:18,629 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 1558 mSDsluCounter, 488 mSDsCounter, 0 mSdLazyCounter, 675 mSolverCounterSat, 427 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1620 SdHoareTripleChecker+Valid, 571 SdHoareTripleChecker+Invalid, 1102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 427 IncrementalHoareTripleChecker+Valid, 675 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:18,629 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1620 Valid, 571 Invalid, 1102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [427 Valid, 675 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:18,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2022-01-31 18:21:18,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 268. [2022-01-31 18:21:18,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 268 states, 262 states have (on average 1.251908396946565) internal successors, (328), 262 states have internal predecessors, (328), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:18,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 268 states to 268 states and 333 transitions. [2022-01-31 18:21:18,639 INFO L78 Accepts]: Start accepts. Automaton has 268 states and 333 transitions. Word has length 259 [2022-01-31 18:21:18,639 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:18,639 INFO L470 AbstractCegarLoop]: Abstraction has 268 states and 333 transitions. [2022-01-31 18:21:18,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.923076923076923) internal successors, (255), 64 states have internal predecessors, (255), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:18,640 INFO L276 IsEmpty]: Start isEmpty. Operand 268 states and 333 transitions. [2022-01-31 18:21:18,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 264 [2022-01-31 18:21:18,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:18,641 INFO L514 BasicCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:18,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 18:21:18,641 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:18,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:18,642 INFO L85 PathProgramCache]: Analyzing trace with hash 978989793, now seen corresponding path program 62 times [2022-01-31 18:21:18,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:18,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1244350086] [2022-01-31 18:21:18,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:18,646 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:18,646 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:18,646 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:18,661 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:20,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:20,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:20,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:20,225 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:20,225 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1244350086] [2022-01-31 18:21:20,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1244350086] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:20,226 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:20,226 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [66] imperfect sequences [] total 66 [2022-01-31 18:21:20,226 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140368685] [2022-01-31 18:21:20,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:20,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2022-01-31 18:21:20,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:20,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2022-01-31 18:21:20,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2082, Invalid=2208, Unknown=0, NotChecked=0, Total=4290 [2022-01-31 18:21:20,228 INFO L87 Difference]: Start difference. First operand 268 states and 333 transitions. Second operand has 66 states, 66 states have (on average 3.9242424242424243) internal successors, (259), 65 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:21,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:21,396 INFO L93 Difference]: Finished difference Result 666 states and 925 transitions. [2022-01-31 18:21:21,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 18:21:21,397 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.9242424242424243) internal successors, (259), 65 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 263 [2022-01-31 18:21:21,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:21,400 INFO L225 Difference]: With dead ends: 666 [2022-01-31 18:21:21,400 INFO L226 Difference]: Without dead ends: 653 [2022-01-31 18:21:21,400 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2148, Invalid=2274, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:21:21,400 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 1680 mSDsluCounter, 501 mSDsCounter, 0 mSdLazyCounter, 681 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1743 SdHoareTripleChecker+Valid, 585 SdHoareTripleChecker+Invalid, 1151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 681 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:21,401 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1743 Valid, 585 Invalid, 1151 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 681 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:21,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2022-01-31 18:21:21,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 272. [2022-01-31 18:21:21,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 266 states have (on average 1.2518796992481203) internal successors, (333), 266 states have internal predecessors, (333), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:21,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 338 transitions. [2022-01-31 18:21:21,413 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 338 transitions. Word has length 263 [2022-01-31 18:21:21,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:21,413 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 338 transitions. [2022-01-31 18:21:21,413 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.9242424242424243) internal successors, (259), 65 states have internal predecessors, (259), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:21,413 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 338 transitions. [2022-01-31 18:21:21,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2022-01-31 18:21:21,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:21,415 INFO L514 BasicCegarLoop]: trace histogram [63, 63, 63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:21,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 18:21:21,415 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:21,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:21,415 INFO L85 PathProgramCache]: Analyzing trace with hash 228810012, now seen corresponding path program 63 times [2022-01-31 18:21:21,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:21,415 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2022188305] [2022-01-31 18:21:21,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:21,418 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:21,418 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:21,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:21,427 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:21,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:23,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:23,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:23,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:23,046 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:23,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2022188305] [2022-01-31 18:21:23,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2022188305] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:23,046 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:23,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [67] imperfect sequences [] total 67 [2022-01-31 18:21:23,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542948214] [2022-01-31 18:21:23,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:23,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2022-01-31 18:21:23,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:23,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2022-01-31 18:21:23,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2147, Invalid=2275, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 18:21:23,048 INFO L87 Difference]: Start difference. First operand 272 states and 338 transitions. Second operand has 67 states, 67 states have (on average 3.925373134328358) internal successors, (263), 66 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:24,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:24,074 INFO L93 Difference]: Finished difference Result 676 states and 939 transitions. [2022-01-31 18:21:24,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 18:21:24,075 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.925373134328358) internal successors, (263), 66 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 267 [2022-01-31 18:21:24,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:24,077 INFO L225 Difference]: With dead ends: 676 [2022-01-31 18:21:24,077 INFO L226 Difference]: Without dead ends: 663 [2022-01-31 18:21:24,077 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2214, Invalid=2342, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:21:24,077 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 2131 mSDsluCounter, 491 mSDsCounter, 0 mSdLazyCounter, 638 mSolverCounterSat, 614 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2195 SdHoareTripleChecker+Valid, 576 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 614 IncrementalHoareTripleChecker+Valid, 638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:24,077 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2195 Valid, 576 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [614 Valid, 638 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:24,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 663 states. [2022-01-31 18:21:24,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 663 to 276. [2022-01-31 18:21:24,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 270 states have (on average 1.2518518518518518) internal successors, (338), 270 states have internal predecessors, (338), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:24,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 343 transitions. [2022-01-31 18:21:24,087 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 343 transitions. Word has length 267 [2022-01-31 18:21:24,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:24,087 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 343 transitions. [2022-01-31 18:21:24,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.925373134328358) internal successors, (263), 66 states have internal predecessors, (263), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:24,088 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 343 transitions. [2022-01-31 18:21:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 272 [2022-01-31 18:21:24,089 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:24,089 INFO L514 BasicCegarLoop]: trace histogram [64, 64, 64, 64, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:24,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 18:21:24,089 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:24,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:24,089 INFO L85 PathProgramCache]: Analyzing trace with hash 1736896983, now seen corresponding path program 64 times [2022-01-31 18:21:24,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:24,090 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [912757663] [2022-01-31 18:21:24,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:24,093 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:24,093 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:24,093 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:24,107 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:24,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:25,746 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:25,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:25,749 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:25,749 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:25,749 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [912757663] [2022-01-31 18:21:25,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [912757663] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:25,749 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:25,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [68] imperfect sequences [] total 68 [2022-01-31 18:21:25,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939487290] [2022-01-31 18:21:25,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:25,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2022-01-31 18:21:25,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:25,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2022-01-31 18:21:25,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2213, Invalid=2343, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 18:21:25,751 INFO L87 Difference]: Start difference. First operand 276 states and 343 transitions. Second operand has 68 states, 68 states have (on average 3.926470588235294) internal successors, (267), 67 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:26,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:26,815 INFO L93 Difference]: Finished difference Result 686 states and 953 transitions. [2022-01-31 18:21:26,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 18:21:26,816 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 3.926470588235294) internal successors, (267), 67 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 271 [2022-01-31 18:21:26,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:26,818 INFO L225 Difference]: With dead ends: 686 [2022-01-31 18:21:26,818 INFO L226 Difference]: Without dead ends: 673 [2022-01-31 18:21:26,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2281, Invalid=2411, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:21:26,819 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 1987 mSDsluCounter, 512 mSDsCounter, 0 mSdLazyCounter, 687 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2052 SdHoareTripleChecker+Valid, 598 SdHoareTripleChecker+Invalid, 1257 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 687 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:26,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2052 Valid, 598 Invalid, 1257 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 687 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:26,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 673 states. [2022-01-31 18:21:26,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 673 to 280. [2022-01-31 18:21:26,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 274 states have (on average 1.2518248175182483) internal successors, (343), 274 states have internal predecessors, (343), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:26,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 348 transitions. [2022-01-31 18:21:26,827 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 348 transitions. Word has length 271 [2022-01-31 18:21:26,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:26,827 INFO L470 AbstractCegarLoop]: Abstraction has 280 states and 348 transitions. [2022-01-31 18:21:26,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 3.926470588235294) internal successors, (267), 67 states have internal predecessors, (267), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:26,827 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 348 transitions. [2022-01-31 18:21:26,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 276 [2022-01-31 18:21:26,828 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:26,828 INFO L514 BasicCegarLoop]: trace histogram [65, 65, 65, 65, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:26,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 18:21:26,829 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:26,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:26,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1204531474, now seen corresponding path program 65 times [2022-01-31 18:21:26,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:26,829 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1923995098] [2022-01-31 18:21:26,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:26,833 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:26,833 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:26,833 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:26,844 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:27,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,535 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:28,537 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:28,538 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:28,538 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1923995098] [2022-01-31 18:21:28,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1923995098] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:28,538 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:28,538 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [69] imperfect sequences [] total 69 [2022-01-31 18:21:28,538 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658656787] [2022-01-31 18:21:28,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:28,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2022-01-31 18:21:28,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:28,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2022-01-31 18:21:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2280, Invalid=2412, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 18:21:28,540 INFO L87 Difference]: Start difference. First operand 280 states and 348 transitions. Second operand has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 68 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:29,636 INFO L93 Difference]: Finished difference Result 696 states and 967 transitions. [2022-01-31 18:21:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 18:21:29,637 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 68 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 275 [2022-01-31 18:21:29,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:29,645 INFO L225 Difference]: With dead ends: 696 [2022-01-31 18:21:29,645 INFO L226 Difference]: Without dead ends: 683 [2022-01-31 18:21:29,645 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2349, Invalid=2481, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 18:21:29,646 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 1691 mSDsluCounter, 539 mSDsCounter, 0 mSdLazyCounter, 683 mSolverCounterSat, 470 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1757 SdHoareTripleChecker+Valid, 626 SdHoareTripleChecker+Invalid, 1153 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 470 IncrementalHoareTripleChecker+Valid, 683 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:29,646 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1757 Valid, 626 Invalid, 1153 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [470 Valid, 683 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2022-01-31 18:21:29,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 284. [2022-01-31 18:21:29,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 278 states have (on average 1.2517985611510791) internal successors, (348), 278 states have internal predecessors, (348), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:29,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 353 transitions. [2022-01-31 18:21:29,655 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 353 transitions. Word has length 275 [2022-01-31 18:21:29,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:29,655 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 353 transitions. [2022-01-31 18:21:29,655 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.927536231884058) internal successors, (271), 68 states have internal predecessors, (271), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:29,655 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 353 transitions. [2022-01-31 18:21:29,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 280 [2022-01-31 18:21:29,656 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:29,656 INFO L514 BasicCegarLoop]: trace histogram [66, 66, 66, 66, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:29,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 18:21:29,657 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:29,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:29,657 INFO L85 PathProgramCache]: Analyzing trace with hash -321365299, now seen corresponding path program 66 times [2022-01-31 18:21:29,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:29,657 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1094659375] [2022-01-31 18:21:29,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:29,660 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:29,660 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:29,660 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:29,673 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:29,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:32,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:32,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:32,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:32,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:32,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1094659375] [2022-01-31 18:21:32,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1094659375] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:32,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:32,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [70] imperfect sequences [] total 70 [2022-01-31 18:21:32,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [819166097] [2022-01-31 18:21:32,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:32,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:21:32,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:32,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:21:32,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:21:32,566 INFO L87 Difference]: Start difference. First operand 284 states and 353 transitions. Second operand has 71 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 69 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:34,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:34,109 INFO L93 Difference]: Finished difference Result 706 states and 981 transitions. [2022-01-31 18:21:34,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:21:34,110 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 69 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 279 [2022-01-31 18:21:34,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:34,112 INFO L225 Difference]: With dead ends: 706 [2022-01-31 18:21:34,112 INFO L226 Difference]: Without dead ends: 693 [2022-01-31 18:21:34,113 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=2493, Invalid=2763, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:21:34,113 INFO L933 BasicCegarLoop]: 19 mSDtfsCounter, 1936 mSDsluCounter, 525 mSDsCounter, 0 mSdLazyCounter, 883 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2004 SdHoareTripleChecker+Valid, 544 SdHoareTripleChecker+Invalid, 1490 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 883 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:34,113 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2004 Valid, 544 Invalid, 1490 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 883 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:21:34,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 693 states. [2022-01-31 18:21:34,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 693 to 288. [2022-01-31 18:21:34,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 282 states have (on average 1.25177304964539) internal successors, (353), 282 states have internal predecessors, (353), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:34,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 358 transitions. [2022-01-31 18:21:34,143 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 358 transitions. Word has length 279 [2022-01-31 18:21:34,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:34,144 INFO L470 AbstractCegarLoop]: Abstraction has 288 states and 358 transitions. [2022-01-31 18:21:34,144 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 70 states have (on average 3.9285714285714284) internal successors, (275), 69 states have internal predecessors, (275), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:34,144 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 358 transitions. [2022-01-31 18:21:34,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 284 [2022-01-31 18:21:34,145 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:34,145 INFO L514 BasicCegarLoop]: trace histogram [67, 67, 67, 67, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:34,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 18:21:34,146 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:34,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:34,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2085376248, now seen corresponding path program 67 times [2022-01-31 18:21:34,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:34,146 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1302213065] [2022-01-31 18:21:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:34,150 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:34,150 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:34,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:34,163 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:36,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:36,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:36,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:36,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:36,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1302213065] [2022-01-31 18:21:36,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1302213065] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:36,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:36,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [71] imperfect sequences [] total 71 [2022-01-31 18:21:36,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743225965] [2022-01-31 18:21:36,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:36,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2022-01-31 18:21:36,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:36,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2022-01-31 18:21:36,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2417, Invalid=2553, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 18:21:36,027 INFO L87 Difference]: Start difference. First operand 288 states and 358 transitions. Second operand has 71 states, 71 states have (on average 3.9295774647887325) internal successors, (279), 70 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:37,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:37,690 INFO L93 Difference]: Finished difference Result 716 states and 995 transitions. [2022-01-31 18:21:37,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 18:21:37,690 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 3.9295774647887325) internal successors, (279), 70 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 283 [2022-01-31 18:21:37,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:37,692 INFO L225 Difference]: With dead ends: 716 [2022-01-31 18:21:37,692 INFO L226 Difference]: Without dead ends: 703 [2022-01-31 18:21:37,692 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2488, Invalid=2624, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:21:37,692 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 2276 mSDsluCounter, 526 mSDsCounter, 0 mSdLazyCounter, 645 mSolverCounterSat, 662 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2344 SdHoareTripleChecker+Valid, 615 SdHoareTripleChecker+Invalid, 1307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 662 IncrementalHoareTripleChecker+Valid, 645 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:37,692 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2344 Valid, 615 Invalid, 1307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [662 Valid, 645 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 18:21:37,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 703 states. [2022-01-31 18:21:37,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 703 to 292. [2022-01-31 18:21:37,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 286 states have (on average 1.2517482517482517) internal successors, (358), 286 states have internal predecessors, (358), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:37,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 363 transitions. [2022-01-31 18:21:37,724 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 363 transitions. Word has length 283 [2022-01-31 18:21:37,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:37,724 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 363 transitions. [2022-01-31 18:21:37,725 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 3.9295774647887325) internal successors, (279), 70 states have internal predecessors, (279), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:37,725 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 363 transitions. [2022-01-31 18:21:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 288 [2022-01-31 18:21:37,726 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:37,726 INFO L514 BasicCegarLoop]: trace histogram [68, 68, 68, 68, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:37,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 18:21:37,726 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:37,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:37,727 INFO L85 PathProgramCache]: Analyzing trace with hash -670798397, now seen corresponding path program 68 times [2022-01-31 18:21:37,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:37,727 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290097033] [2022-01-31 18:21:37,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:37,731 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:37,732 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:37,732 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:37,746 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:37,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:39,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:39,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:39,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:39,657 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:39,657 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290097033] [2022-01-31 18:21:39,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [290097033] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:39,657 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:39,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [72] imperfect sequences [] total 72 [2022-01-31 18:21:39,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914631827] [2022-01-31 18:21:39,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:39,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2022-01-31 18:21:39,658 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:39,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2022-01-31 18:21:39,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2487, Invalid=2625, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 18:21:39,660 INFO L87 Difference]: Start difference. First operand 292 states and 363 transitions. Second operand has 72 states, 72 states have (on average 3.9305555555555554) internal successors, (283), 71 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:41,953 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:41,953 INFO L93 Difference]: Finished difference Result 726 states and 1009 transitions. [2022-01-31 18:21:41,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 18:21:41,953 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.9305555555555554) internal successors, (283), 71 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 287 [2022-01-31 18:21:41,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:41,955 INFO L225 Difference]: With dead ends: 726 [2022-01-31 18:21:41,956 INFO L226 Difference]: Without dead ends: 713 [2022-01-31 18:21:41,956 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2559, Invalid=2697, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:21:41,956 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 1997 mSDsluCounter, 556 mSDsCounter, 0 mSdLazyCounter, 762 mSolverCounterSat, 567 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2066 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 1329 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 567 IncrementalHoareTripleChecker+Valid, 762 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:41,957 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2066 Valid, 646 Invalid, 1329 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [567 Valid, 762 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:21:41,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 713 states. [2022-01-31 18:21:41,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 713 to 296. [2022-01-31 18:21:41,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 290 states have (on average 1.2517241379310344) internal successors, (363), 290 states have internal predecessors, (363), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:41,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 368 transitions. [2022-01-31 18:21:41,998 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 368 transitions. Word has length 287 [2022-01-31 18:21:41,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:41,999 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 368 transitions. [2022-01-31 18:21:41,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.9305555555555554) internal successors, (283), 71 states have internal predecessors, (283), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:41,999 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 368 transitions. [2022-01-31 18:21:42,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 292 [2022-01-31 18:21:42,000 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:42,000 INFO L514 BasicCegarLoop]: trace histogram [69, 69, 69, 69, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:42,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 18:21:42,001 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:42,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:42,001 INFO L85 PathProgramCache]: Analyzing trace with hash 68245246, now seen corresponding path program 69 times [2022-01-31 18:21:42,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:42,001 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1022285929] [2022-01-31 18:21:42,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:42,006 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:42,007 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:42,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:42,020 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:42,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:43,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:43,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:43,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:43,990 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:43,990 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1022285929] [2022-01-31 18:21:43,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1022285929] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:43,991 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:43,991 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [73] imperfect sequences [] total 73 [2022-01-31 18:21:43,991 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737211642] [2022-01-31 18:21:43,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:43,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-01-31 18:21:43,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:43,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-01-31 18:21:43,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2558, Invalid=2698, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 18:21:43,993 INFO L87 Difference]: Start difference. First operand 296 states and 368 transitions. Second operand has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 72 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:46,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:46,501 INFO L93 Difference]: Finished difference Result 736 states and 1023 transitions. [2022-01-31 18:21:46,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 18:21:46,501 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 72 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 291 [2022-01-31 18:21:46,502 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:46,507 INFO L225 Difference]: With dead ends: 736 [2022-01-31 18:21:46,507 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 18:21:46,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2631, Invalid=2771, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:21:46,508 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 2273 mSDsluCounter, 542 mSDsCounter, 0 mSdLazyCounter, 783 mSolverCounterSat, 655 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2343 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 1438 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 655 IncrementalHoareTripleChecker+Valid, 783 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:46,508 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2343 Valid, 633 Invalid, 1438 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [655 Valid, 783 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:21:46,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 18:21:46,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 300. [2022-01-31 18:21:46,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 294 states have (on average 1.251700680272109) internal successors, (368), 294 states have internal predecessors, (368), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:46,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 373 transitions. [2022-01-31 18:21:46,557 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 373 transitions. Word has length 291 [2022-01-31 18:21:46,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:46,557 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 373 transitions. [2022-01-31 18:21:46,558 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.9315068493150687) internal successors, (287), 72 states have internal predecessors, (287), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:46,558 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 373 transitions. [2022-01-31 18:21:46,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 296 [2022-01-31 18:21:46,559 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:46,559 INFO L514 BasicCegarLoop]: trace histogram [70, 70, 70, 70, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:46,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 18:21:46,559 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:46,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:46,560 INFO L85 PathProgramCache]: Analyzing trace with hash 549530297, now seen corresponding path program 70 times [2022-01-31 18:21:46,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:46,560 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [537458885] [2022-01-31 18:21:46,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:46,563 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:46,563 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:46,563 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:46,581 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:46,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:48,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:48,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:48,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:48,703 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:48,703 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [537458885] [2022-01-31 18:21:48,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [537458885] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:48,703 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:48,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [74] imperfect sequences [] total 74 [2022-01-31 18:21:48,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74381282] [2022-01-31 18:21:48,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:48,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-01-31 18:21:48,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:48,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-01-31 18:21:48,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2630, Invalid=2772, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 18:21:48,706 INFO L87 Difference]: Start difference. First operand 300 states and 373 transitions. Second operand has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 73 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:51,626 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:51,626 INFO L93 Difference]: Finished difference Result 746 states and 1037 transitions. [2022-01-31 18:21:51,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2022-01-31 18:21:51,627 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 73 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 295 [2022-01-31 18:21:51,627 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:51,629 INFO L225 Difference]: With dead ends: 746 [2022-01-31 18:21:51,629 INFO L226 Difference]: Without dead ends: 733 [2022-01-31 18:21:51,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2704, Invalid=2846, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:21:51,630 INFO L933 BasicCegarLoop]: 92 mSDtfsCounter, 1664 mSDsluCounter, 577 mSDsCounter, 0 mSdLazyCounter, 852 mSolverCounterSat, 453 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1735 SdHoareTripleChecker+Valid, 669 SdHoareTripleChecker+Invalid, 1305 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 453 IncrementalHoareTripleChecker+Valid, 852 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:51,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [1735 Valid, 669 Invalid, 1305 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [453 Valid, 852 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:21:51,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 733 states. [2022-01-31 18:21:51,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 733 to 304. [2022-01-31 18:21:51,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 298 states have (on average 1.2516778523489933) internal successors, (373), 298 states have internal predecessors, (373), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:51,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 378 transitions. [2022-01-31 18:21:51,695 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 378 transitions. Word has length 295 [2022-01-31 18:21:51,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:51,696 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 378 transitions. [2022-01-31 18:21:51,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 3.9324324324324325) internal successors, (291), 73 states have internal predecessors, (291), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:51,696 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 378 transitions. [2022-01-31 18:21:51,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 300 [2022-01-31 18:21:51,697 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:51,697 INFO L514 BasicCegarLoop]: trace histogram [71, 71, 71, 71, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:51,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 18:21:51,698 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:51,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:51,698 INFO L85 PathProgramCache]: Analyzing trace with hash -174413580, now seen corresponding path program 71 times [2022-01-31 18:21:51,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:51,698 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2045395783] [2022-01-31 18:21:51,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:51,701 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:51,701 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:51,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:51,719 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:51,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:53,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:53,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:53,679 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:53,679 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:53,679 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2045395783] [2022-01-31 18:21:53,679 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2045395783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:53,679 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:53,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [75] imperfect sequences [] total 75 [2022-01-31 18:21:53,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970218707] [2022-01-31 18:21:53,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:53,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2022-01-31 18:21:53,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:53,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2022-01-31 18:21:53,681 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2703, Invalid=2847, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 18:21:53,681 INFO L87 Difference]: Start difference. First operand 304 states and 378 transitions. Second operand has 75 states, 75 states have (on average 3.933333333333333) internal successors, (295), 74 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:21:57,680 INFO L93 Difference]: Finished difference Result 756 states and 1051 transitions. [2022-01-31 18:21:57,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 18:21:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.933333333333333) internal successors, (295), 74 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 299 [2022-01-31 18:21:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:21:57,682 INFO L225 Difference]: With dead ends: 756 [2022-01-31 18:21:57,682 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 18:21:57,683 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2778, Invalid=2922, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:21:57,683 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 2087 mSDsluCounter, 564 mSDsCounter, 0 mSdLazyCounter, 724 mSolverCounterSat, 592 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2159 SdHoareTripleChecker+Valid, 657 SdHoareTripleChecker+Invalid, 1316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 592 IncrementalHoareTripleChecker+Valid, 724 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:21:57,683 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2159 Valid, 657 Invalid, 1316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [592 Valid, 724 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:21:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 18:21:57,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 308. [2022-01-31 18:21:57,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 302 states have (on average 1.2516556291390728) internal successors, (378), 302 states have internal predecessors, (378), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:21:57,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 383 transitions. [2022-01-31 18:21:57,755 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 383 transitions. Word has length 299 [2022-01-31 18:21:57,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:21:57,756 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 383 transitions. [2022-01-31 18:21:57,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.933333333333333) internal successors, (295), 74 states have internal predecessors, (295), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:21:57,756 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 383 transitions. [2022-01-31 18:21:57,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 304 [2022-01-31 18:21:57,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:21:57,757 INFO L514 BasicCegarLoop]: trace histogram [72, 72, 72, 72, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:21:57,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 18:21:57,757 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:21:57,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:21:57,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1463512657, now seen corresponding path program 72 times [2022-01-31 18:21:57,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:21:57,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1592689232] [2022-01-31 18:21:57,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:21:57,762 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:21:57,762 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:21:57,762 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:21:57,779 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:21:57,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:59,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:21:59,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:21:59,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:21:59,885 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:21:59,885 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1592689232] [2022-01-31 18:21:59,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1592689232] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:21:59,885 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:21:59,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [76] imperfect sequences [] total 76 [2022-01-31 18:21:59,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335753500] [2022-01-31 18:21:59,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:21:59,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2022-01-31 18:21:59,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:21:59,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2022-01-31 18:21:59,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2777, Invalid=2923, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 18:21:59,887 INFO L87 Difference]: Start difference. First operand 308 states and 383 transitions. Second operand has 76 states, 76 states have (on average 3.9342105263157894) internal successors, (299), 75 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:05,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:05,259 INFO L93 Difference]: Finished difference Result 766 states and 1065 transitions. [2022-01-31 18:22:05,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 18:22:05,259 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.9342105263157894) internal successors, (299), 75 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 303 [2022-01-31 18:22:05,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:05,261 INFO L225 Difference]: With dead ends: 766 [2022-01-31 18:22:05,261 INFO L226 Difference]: Without dead ends: 753 [2022-01-31 18:22:05,261 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=2853, Invalid=2999, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:22:05,261 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 2321 mSDsluCounter, 574 mSDsCounter, 0 mSdLazyCounter, 778 mSolverCounterSat, 664 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2394 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1442 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 664 IncrementalHoareTripleChecker+Valid, 778 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:05,261 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2394 Valid, 668 Invalid, 1442 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [664 Valid, 778 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:22:05,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 753 states. [2022-01-31 18:22:05,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 753 to 312. [2022-01-31 18:22:05,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 306 states have (on average 1.2516339869281046) internal successors, (383), 306 states have internal predecessors, (383), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:05,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 388 transitions. [2022-01-31 18:22:05,350 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 388 transitions. Word has length 303 [2022-01-31 18:22:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:05,350 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 388 transitions. [2022-01-31 18:22:05,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.9342105263157894) internal successors, (299), 75 states have internal predecessors, (299), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 388 transitions. [2022-01-31 18:22:05,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 308 [2022-01-31 18:22:05,351 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:05,351 INFO L514 BasicCegarLoop]: trace histogram [73, 73, 73, 73, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:05,351 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 18:22:05,351 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:05,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:05,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1862640874, now seen corresponding path program 73 times [2022-01-31 18:22:05,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:05,352 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081553238] [2022-01-31 18:22:05,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:05,354 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:05,354 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:05,354 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:05,372 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:05,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:07,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:07,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:07,380 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:07,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081553238] [2022-01-31 18:22:07,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081553238] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:07,380 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:07,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [77] imperfect sequences [] total 77 [2022-01-31 18:22:07,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089148086] [2022-01-31 18:22:07,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:07,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2022-01-31 18:22:07,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:07,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2022-01-31 18:22:07,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2852, Invalid=3000, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 18:22:07,382 INFO L87 Difference]: Start difference. First operand 312 states and 388 transitions. Second operand has 77 states, 77 states have (on average 3.935064935064935) internal successors, (303), 76 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:13,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:13,720 INFO L93 Difference]: Finished difference Result 776 states and 1079 transitions. [2022-01-31 18:22:13,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2022-01-31 18:22:13,721 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.935064935064935) internal successors, (303), 76 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 307 [2022-01-31 18:22:13,721 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:13,723 INFO L225 Difference]: With dead ends: 776 [2022-01-31 18:22:13,723 INFO L226 Difference]: Without dead ends: 763 [2022-01-31 18:22:13,723 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2929, Invalid=3077, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:22:13,724 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 2247 mSDsluCounter, 573 mSDsCounter, 0 mSdLazyCounter, 842 mSolverCounterSat, 637 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2321 SdHoareTripleChecker+Valid, 668 SdHoareTripleChecker+Invalid, 1479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 637 IncrementalHoareTripleChecker+Valid, 842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:13,724 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2321 Valid, 668 Invalid, 1479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [637 Valid, 842 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:22:13,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 763 states. [2022-01-31 18:22:13,874 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 763 to 316. [2022-01-31 18:22:13,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 310 states have (on average 1.2516129032258065) internal successors, (388), 310 states have internal predecessors, (388), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:13,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 393 transitions. [2022-01-31 18:22:13,875 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 393 transitions. Word has length 307 [2022-01-31 18:22:13,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:13,876 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 393 transitions. [2022-01-31 18:22:13,876 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.935064935064935) internal successors, (303), 76 states have internal predecessors, (303), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:13,876 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 393 transitions. [2022-01-31 18:22:13,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 312 [2022-01-31 18:22:13,877 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:13,877 INFO L514 BasicCegarLoop]: trace histogram [74, 74, 74, 74, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:13,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 18:22:13,878 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:13,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:13,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1002742437, now seen corresponding path program 74 times [2022-01-31 18:22:13,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:13,878 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1866319027] [2022-01-31 18:22:13,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:13,881 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:13,881 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:13,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:13,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:14,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:16,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:16,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:16,167 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:16,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1866319027] [2022-01-31 18:22:16,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1866319027] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:16,167 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:16,167 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [78] imperfect sequences [] total 78 [2022-01-31 18:22:16,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227379186] [2022-01-31 18:22:16,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:16,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2022-01-31 18:22:16,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:16,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2022-01-31 18:22:16,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2928, Invalid=3078, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 18:22:16,169 INFO L87 Difference]: Start difference. First operand 316 states and 393 transitions. Second operand has 78 states, 78 states have (on average 3.9358974358974357) internal successors, (307), 77 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:24,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:24,085 INFO L93 Difference]: Finished difference Result 786 states and 1093 transitions. [2022-01-31 18:22:24,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 18:22:24,086 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.9358974358974357) internal successors, (307), 77 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 311 [2022-01-31 18:22:24,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:24,087 INFO L225 Difference]: With dead ends: 786 [2022-01-31 18:22:24,087 INFO L226 Difference]: Without dead ends: 773 [2022-01-31 18:22:24,088 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3006, Invalid=3156, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:22:24,088 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 1950 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 897 mSolverCounterSat, 540 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2025 SdHoareTripleChecker+Valid, 690 SdHoareTripleChecker+Invalid, 1437 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 540 IncrementalHoareTripleChecker+Valid, 897 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:24,088 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2025 Valid, 690 Invalid, 1437 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [540 Valid, 897 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:22:24,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 773 states. [2022-01-31 18:22:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 773 to 320. [2022-01-31 18:22:24,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 314 states have (on average 1.2515923566878981) internal successors, (393), 314 states have internal predecessors, (393), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:24,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 398 transitions. [2022-01-31 18:22:24,241 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 398 transitions. Word has length 311 [2022-01-31 18:22:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:24,241 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 398 transitions. [2022-01-31 18:22:24,241 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.9358974358974357) internal successors, (307), 77 states have internal predecessors, (307), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 398 transitions. [2022-01-31 18:22:24,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 316 [2022-01-31 18:22:24,243 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:24,243 INFO L514 BasicCegarLoop]: trace histogram [75, 75, 75, 75, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:24,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 18:22:24,243 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:24,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1896368864, now seen corresponding path program 75 times [2022-01-31 18:22:24,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:24,244 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [856009099] [2022-01-31 18:22:24,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:24,247 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:24,247 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:24,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:24,264 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:26,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:26,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:26,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:26,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [856009099] [2022-01-31 18:22:26,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [856009099] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:26,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:26,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [79] imperfect sequences [] total 79 [2022-01-31 18:22:26,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474737890] [2022-01-31 18:22:26,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:26,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2022-01-31 18:22:26,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2022-01-31 18:22:26,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3005, Invalid=3157, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 18:22:26,486 INFO L87 Difference]: Start difference. First operand 320 states and 398 transitions. Second operand has 79 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 78 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:36,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:36,942 INFO L93 Difference]: Finished difference Result 796 states and 1107 transitions. [2022-01-31 18:22:36,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 18:22:36,943 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 78 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 315 [2022-01-31 18:22:36,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:36,944 INFO L225 Difference]: With dead ends: 796 [2022-01-31 18:22:36,944 INFO L226 Difference]: Without dead ends: 783 [2022-01-31 18:22:36,944 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3084, Invalid=3236, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:22:36,945 INFO L933 BasicCegarLoop]: 97 mSDtfsCounter, 2013 mSDsluCounter, 594 mSDsCounter, 0 mSdLazyCounter, 837 mSolverCounterSat, 556 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2089 SdHoareTripleChecker+Valid, 691 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 556 IncrementalHoareTripleChecker+Valid, 837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:36,945 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2089 Valid, 691 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [556 Valid, 837 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:22:36,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2022-01-31 18:22:37,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 324. [2022-01-31 18:22:37,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 324 states, 318 states have (on average 1.251572327044025) internal successors, (398), 318 states have internal predecessors, (398), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:37,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 324 states to 324 states and 403 transitions. [2022-01-31 18:22:37,139 INFO L78 Accepts]: Start accepts. Automaton has 324 states and 403 transitions. Word has length 315 [2022-01-31 18:22:37,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:37,140 INFO L470 AbstractCegarLoop]: Abstraction has 324 states and 403 transitions. [2022-01-31 18:22:37,140 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.9367088607594938) internal successors, (311), 78 states have internal predecessors, (311), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:37,140 INFO L276 IsEmpty]: Start isEmpty. Operand 324 states and 403 transitions. [2022-01-31 18:22:37,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 320 [2022-01-31 18:22:37,141 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:37,142 INFO L514 BasicCegarLoop]: trace histogram [76, 76, 76, 76, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:37,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 18:22:37,142 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:37,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash -1888002661, now seen corresponding path program 76 times [2022-01-31 18:22:37,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:37,142 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [212063292] [2022-01-31 18:22:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:37,145 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:37,146 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:37,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:37,164 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:37,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:39,337 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:39,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:39,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:39,340 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:39,340 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [212063292] [2022-01-31 18:22:39,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [212063292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:39,340 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:39,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [80] imperfect sequences [] total 80 [2022-01-31 18:22:39,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993914396] [2022-01-31 18:22:39,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:39,343 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2022-01-31 18:22:39,343 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:39,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2022-01-31 18:22:39,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3083, Invalid=3237, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 18:22:39,345 INFO L87 Difference]: Start difference. First operand 324 states and 403 transitions. Second operand has 80 states, 80 states have (on average 3.9375) internal successors, (315), 79 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:52,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:22:52,529 INFO L93 Difference]: Finished difference Result 806 states and 1121 transitions. [2022-01-31 18:22:52,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2022-01-31 18:22:52,529 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 3.9375) internal successors, (315), 79 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 319 [2022-01-31 18:22:52,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:22:52,531 INFO L225 Difference]: With dead ends: 806 [2022-01-31 18:22:52,531 INFO L226 Difference]: Without dead ends: 793 [2022-01-31 18:22:52,531 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3163, Invalid=3317, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:22:52,531 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 2047 mSDsluCounter, 634 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 570 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2124 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 1395 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 570 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:22:52,531 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2124 Valid, 732 Invalid, 1395 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [570 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:22:52,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2022-01-31 18:22:52,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 328. [2022-01-31 18:22:52,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 322 states have (on average 1.2515527950310559) internal successors, (403), 322 states have internal predecessors, (403), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:22:52,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 408 transitions. [2022-01-31 18:22:52,767 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 408 transitions. Word has length 319 [2022-01-31 18:22:52,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:22:52,767 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 408 transitions. [2022-01-31 18:22:52,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 3.9375) internal successors, (315), 79 states have internal predecessors, (315), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:22:52,767 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 408 transitions. [2022-01-31 18:22:52,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 324 [2022-01-31 18:22:52,769 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:22:52,769 INFO L514 BasicCegarLoop]: trace histogram [77, 77, 77, 77, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:22:52,769 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 18:22:52,769 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:22:52,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:22:52,770 INFO L85 PathProgramCache]: Analyzing trace with hash -430400810, now seen corresponding path program 77 times [2022-01-31 18:22:52,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:22:52,770 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1081792561] [2022-01-31 18:22:52,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:22:52,773 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:22:52,773 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:22:52,773 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:22:52,794 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:22:52,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:55,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:22:55,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:22:55,025 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:22:55,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:22:55,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1081792561] [2022-01-31 18:22:55,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1081792561] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:22:55,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:22:55,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [81] imperfect sequences [] total 81 [2022-01-31 18:22:55,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370601836] [2022-01-31 18:22:55,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:22:55,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2022-01-31 18:22:55,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:22:55,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2022-01-31 18:22:55,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3162, Invalid=3318, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 18:22:55,029 INFO L87 Difference]: Start difference. First operand 328 states and 408 transitions. Second operand has 81 states, 81 states have (on average 3.9382716049382718) internal successors, (319), 80 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:12,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:12,919 INFO L93 Difference]: Finished difference Result 816 states and 1135 transitions. [2022-01-31 18:23:12,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2022-01-31 18:23:12,920 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.9382716049382718) internal successors, (319), 80 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 323 [2022-01-31 18:23:12,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:12,921 INFO L225 Difference]: With dead ends: 816 [2022-01-31 18:23:12,921 INFO L226 Difference]: Without dead ends: 803 [2022-01-31 18:23:12,922 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3243, Invalid=3399, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:23:12,922 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 1930 mSDsluCounter, 629 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 534 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2008 SdHoareTripleChecker+Valid, 728 SdHoareTripleChecker+Invalid, 1393 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 534 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:12,922 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2008 Valid, 728 Invalid, 1393 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [534 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 18:23:12,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 803 states. [2022-01-31 18:23:13,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 803 to 332. [2022-01-31 18:23:13,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 326 states have (on average 1.2515337423312884) internal successors, (408), 326 states have internal predecessors, (408), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:13,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 413 transitions. [2022-01-31 18:23:13,207 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 413 transitions. Word has length 323 [2022-01-31 18:23:13,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:13,207 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 413 transitions. [2022-01-31 18:23:13,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.9382716049382718) internal successors, (319), 80 states have internal predecessors, (319), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:13,208 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 413 transitions. [2022-01-31 18:23:13,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 328 [2022-01-31 18:23:13,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:13,209 INFO L514 BasicCegarLoop]: trace histogram [78, 78, 78, 78, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:13,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 18:23:13,210 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:13,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:13,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1133691537, now seen corresponding path program 78 times [2022-01-31 18:23:13,211 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:13,211 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1234920336] [2022-01-31 18:23:13,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:13,215 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:13,215 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:13,215 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:13,236 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:13,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:15,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:15,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:15,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:15,690 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:15,690 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1234920336] [2022-01-31 18:23:15,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1234920336] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:15,690 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:15,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [82] imperfect sequences [] total 82 [2022-01-31 18:23:15,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044094225] [2022-01-31 18:23:15,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:15,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2022-01-31 18:23:15,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:15,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2022-01-31 18:23:15,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3242, Invalid=3400, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 18:23:15,692 INFO L87 Difference]: Start difference. First operand 332 states and 413 transitions. Second operand has 82 states, 82 states have (on average 3.9390243902439024) internal successors, (323), 81 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:37,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:23:37,442 INFO L93 Difference]: Finished difference Result 826 states and 1149 transitions. [2022-01-31 18:23:37,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2022-01-31 18:23:37,442 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.9390243902439024) internal successors, (323), 81 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 327 [2022-01-31 18:23:37,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:23:37,444 INFO L225 Difference]: With dead ends: 826 [2022-01-31 18:23:37,444 INFO L226 Difference]: Without dead ends: 813 [2022-01-31 18:23:37,444 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3324, Invalid=3482, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:23:37,444 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 2172 mSDsluCounter, 621 mSDsCounter, 0 mSdLazyCounter, 912 mSolverCounterSat, 607 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2251 SdHoareTripleChecker+Valid, 721 SdHoareTripleChecker+Invalid, 1519 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 607 IncrementalHoareTripleChecker+Valid, 912 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:23:37,445 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2251 Valid, 721 Invalid, 1519 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [607 Valid, 912 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:23:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 813 states. [2022-01-31 18:23:37,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 813 to 336. [2022-01-31 18:23:37,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 330 states have (on average 1.2515151515151515) internal successors, (413), 330 states have internal predecessors, (413), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:23:37,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 418 transitions. [2022-01-31 18:23:37,776 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 418 transitions. Word has length 327 [2022-01-31 18:23:37,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:23:37,776 INFO L470 AbstractCegarLoop]: Abstraction has 336 states and 418 transitions. [2022-01-31 18:23:37,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.9390243902439024) internal successors, (323), 81 states have internal predecessors, (323), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:23:37,776 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 418 transitions. [2022-01-31 18:23:37,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 332 [2022-01-31 18:23:37,777 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:23:37,778 INFO L514 BasicCegarLoop]: trace histogram [79, 79, 79, 79, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:23:37,778 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 18:23:37,778 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:23:37,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:23:37,778 INFO L85 PathProgramCache]: Analyzing trace with hash -1548970804, now seen corresponding path program 79 times [2022-01-31 18:23:37,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:23:37,778 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687364634] [2022-01-31 18:23:37,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:23:37,780 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:23:37,780 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:23:37,781 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:23:37,795 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:23:37,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:40,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:23:40,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:23:40,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:23:40,131 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:23:40,131 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687364634] [2022-01-31 18:23:40,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687364634] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:23:40,131 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:23:40,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [83] imperfect sequences [] total 83 [2022-01-31 18:23:40,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725545502] [2022-01-31 18:23:40,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:23:40,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2022-01-31 18:23:40,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:23:40,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2022-01-31 18:23:40,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3323, Invalid=3483, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 18:23:40,133 INFO L87 Difference]: Start difference. First operand 336 states and 418 transitions. Second operand has 83 states, 83 states have (on average 3.9397590361445785) internal successors, (327), 82 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:07,430 INFO L93 Difference]: Finished difference Result 836 states and 1163 transitions. [2022-01-31 18:24:07,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2022-01-31 18:24:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 3.9397590361445785) internal successors, (327), 82 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 331 [2022-01-31 18:24:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:07,431 INFO L225 Difference]: With dead ends: 836 [2022-01-31 18:24:07,432 INFO L226 Difference]: Without dead ends: 823 [2022-01-31 18:24:07,432 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3406, Invalid=3566, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:24:07,432 INFO L933 BasicCegarLoop]: 101 mSDtfsCounter, 2223 mSDsluCounter, 632 mSDsCounter, 0 mSdLazyCounter, 825 mSolverCounterSat, 623 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2303 SdHoareTripleChecker+Valid, 733 SdHoareTripleChecker+Invalid, 1448 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 623 IncrementalHoareTripleChecker+Valid, 825 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:07,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2303 Valid, 733 Invalid, 1448 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [623 Valid, 825 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:07,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2022-01-31 18:24:07,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 340. [2022-01-31 18:24:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 334 states have (on average 1.251497005988024) internal successors, (418), 334 states have internal predecessors, (418), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 423 transitions. [2022-01-31 18:24:07,989 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 423 transitions. Word has length 331 [2022-01-31 18:24:07,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:07,989 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 423 transitions. [2022-01-31 18:24:07,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 3.9397590361445785) internal successors, (327), 82 states have internal predecessors, (327), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 423 transitions. [2022-01-31 18:24:07,990 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 336 [2022-01-31 18:24:07,991 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:07,991 INFO L514 BasicCegarLoop]: trace histogram [80, 80, 80, 80, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:07,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 18:24:07,991 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:07,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:07,991 INFO L85 PathProgramCache]: Analyzing trace with hash -506670713, now seen corresponding path program 80 times [2022-01-31 18:24:07,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:07,991 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1472486057] [2022-01-31 18:24:07,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:07,994 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:07,995 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:07,995 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:08,010 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:08,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:10,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:10,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:10,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:10,397 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:10,398 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1472486057] [2022-01-31 18:24:10,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1472486057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:10,398 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:10,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [84] imperfect sequences [] total 84 [2022-01-31 18:24:10,398 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831731444] [2022-01-31 18:24:10,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:10,398 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2022-01-31 18:24:10,398 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:10,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2022-01-31 18:24:10,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3405, Invalid=3567, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 18:24:10,400 INFO L87 Difference]: Start difference. First operand 340 states and 423 transitions. Second operand has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 83 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:24:43,920 INFO L93 Difference]: Finished difference Result 846 states and 1177 transitions. [2022-01-31 18:24:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2022-01-31 18:24:43,921 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 83 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 335 [2022-01-31 18:24:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:24:43,922 INFO L225 Difference]: With dead ends: 846 [2022-01-31 18:24:43,922 INFO L226 Difference]: Without dead ends: 833 [2022-01-31 18:24:43,923 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3489, Invalid=3651, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:24:43,923 INFO L933 BasicCegarLoop]: 102 mSDtfsCounter, 2380 mSDsluCounter, 642 mSDsCounter, 0 mSdLazyCounter, 832 mSolverCounterSat, 678 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2461 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 1510 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 678 IncrementalHoareTripleChecker+Valid, 832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:24:43,923 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2461 Valid, 744 Invalid, 1510 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [678 Valid, 832 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:24:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 833 states. [2022-01-31 18:24:44,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 833 to 344. [2022-01-31 18:24:44,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 338 states have (on average 1.2514792899408285) internal successors, (423), 338 states have internal predecessors, (423), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:24:44,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 428 transitions. [2022-01-31 18:24:44,374 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 428 transitions. Word has length 335 [2022-01-31 18:24:44,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:24:44,375 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 428 transitions. [2022-01-31 18:24:44,375 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.9404761904761907) internal successors, (331), 83 states have internal predecessors, (331), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:24:44,375 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 428 transitions. [2022-01-31 18:24:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 340 [2022-01-31 18:24:44,376 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:24:44,376 INFO L514 BasicCegarLoop]: trace histogram [81, 81, 81, 81, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:24:44,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 18:24:44,377 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:24:44,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:24:44,377 INFO L85 PathProgramCache]: Analyzing trace with hash 1740257474, now seen corresponding path program 81 times [2022-01-31 18:24:44,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:24:44,377 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [64306513] [2022-01-31 18:24:44,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:24:44,380 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:24:44,380 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:24:44,380 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:24:44,401 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:24:44,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:46,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:24:46,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:24:46,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:24:46,855 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:24:46,855 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [64306513] [2022-01-31 18:24:46,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [64306513] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:24:46,855 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:24:46,855 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [85] imperfect sequences [] total 85 [2022-01-31 18:24:46,855 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963591327] [2022-01-31 18:24:46,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:24:46,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2022-01-31 18:24:46,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:24:46,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2022-01-31 18:24:46,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3488, Invalid=3652, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 18:24:46,858 INFO L87 Difference]: Start difference. First operand 344 states and 428 transitions. Second operand has 85 states, 85 states have (on average 3.9411764705882355) internal successors, (335), 84 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:22,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:25:22,981 INFO L93 Difference]: Finished difference Result 856 states and 1191 transitions. [2022-01-31 18:25:22,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2022-01-31 18:25:22,981 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 3.9411764705882355) internal successors, (335), 84 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 339 [2022-01-31 18:25:22,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:25:22,983 INFO L225 Difference]: With dead ends: 856 [2022-01-31 18:25:22,983 INFO L226 Difference]: Without dead ends: 843 [2022-01-31 18:25:22,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3573, Invalid=3737, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:25:22,983 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 2210 mSDsluCounter, 664 mSDsCounter, 0 mSdLazyCounter, 877 mSolverCounterSat, 619 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2292 SdHoareTripleChecker+Valid, 767 SdHoareTripleChecker+Invalid, 1496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 619 IncrementalHoareTripleChecker+Valid, 877 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:25:22,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2292 Valid, 767 Invalid, 1496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [619 Valid, 877 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:25:22,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 843 states. [2022-01-31 18:25:23,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 843 to 348. [2022-01-31 18:25:23,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 342 states have (on average 1.2514619883040936) internal successors, (428), 342 states have internal predecessors, (428), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:25:23,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 433 transitions. [2022-01-31 18:25:23,430 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 433 transitions. Word has length 339 [2022-01-31 18:25:23,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:25:23,430 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 433 transitions. [2022-01-31 18:25:23,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 3.9411764705882355) internal successors, (335), 84 states have internal predecessors, (335), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:25:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 433 transitions. [2022-01-31 18:25:23,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 344 [2022-01-31 18:25:23,432 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:25:23,432 INFO L514 BasicCegarLoop]: trace histogram [82, 82, 82, 82, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:25:23,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 18:25:23,432 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:25:23,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:25:23,433 INFO L85 PathProgramCache]: Analyzing trace with hash -572814723, now seen corresponding path program 82 times [2022-01-31 18:25:23,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:25:23,433 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [354054134] [2022-01-31 18:25:23,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:25:23,436 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:25:23,436 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:25:23,437 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:25:23,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:25:23,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:26,047 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:25:26,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:25:26,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:25:26,050 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:25:26,050 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [354054134] [2022-01-31 18:25:26,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [354054134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:25:26,050 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:25:26,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [86] imperfect sequences [] total 86 [2022-01-31 18:25:26,050 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430740543] [2022-01-31 18:25:26,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:25:26,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2022-01-31 18:25:26,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:25:26,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2022-01-31 18:25:26,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3572, Invalid=3738, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 18:25:26,053 INFO L87 Difference]: Start difference. First operand 348 states and 433 transitions. Second operand has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 85 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:03,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:03,908 INFO L93 Difference]: Finished difference Result 866 states and 1205 transitions. [2022-01-31 18:26:03,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-01-31 18:26:03,909 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 85 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 343 [2022-01-31 18:26:03,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:03,910 INFO L225 Difference]: With dead ends: 866 [2022-01-31 18:26:03,910 INFO L226 Difference]: Without dead ends: 853 [2022-01-31 18:26:03,911 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3658, Invalid=3824, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:26:03,911 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 2655 mSDsluCounter, 665 mSDsCounter, 0 mSdLazyCounter, 1055 mSolverCounterSat, 760 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2738 SdHoareTripleChecker+Valid, 769 SdHoareTripleChecker+Invalid, 1815 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 760 IncrementalHoareTripleChecker+Valid, 1055 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:03,911 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2738 Valid, 769 Invalid, 1815 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [760 Valid, 1055 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:26:03,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 853 states. [2022-01-31 18:26:04,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 853 to 352. [2022-01-31 18:26:04,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 352 states, 346 states have (on average 1.2514450867052023) internal successors, (433), 346 states have internal predecessors, (433), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:04,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 352 states to 352 states and 438 transitions. [2022-01-31 18:26:04,388 INFO L78 Accepts]: Start accepts. Automaton has 352 states and 438 transitions. Word has length 343 [2022-01-31 18:26:04,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:04,389 INFO L470 AbstractCegarLoop]: Abstraction has 352 states and 438 transitions. [2022-01-31 18:26:04,389 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 3.941860465116279) internal successors, (339), 85 states have internal predecessors, (339), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:04,389 INFO L276 IsEmpty]: Start isEmpty. Operand 352 states and 438 transitions. [2022-01-31 18:26:04,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 348 [2022-01-31 18:26:04,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:04,390 INFO L514 BasicCegarLoop]: trace histogram [83, 83, 83, 83, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:04,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 18:26:04,391 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:04,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:04,391 INFO L85 PathProgramCache]: Analyzing trace with hash -617118024, now seen corresponding path program 83 times [2022-01-31 18:26:04,391 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:04,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [719826501] [2022-01-31 18:26:04,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:04,394 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:04,394 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:04,394 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:04,409 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:04,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:06,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:06,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:06,922 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:06,922 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [719826501] [2022-01-31 18:26:06,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [719826501] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:06,922 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:06,922 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [87] imperfect sequences [] total 87 [2022-01-31 18:26:06,922 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176728604] [2022-01-31 18:26:06,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:06,923 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2022-01-31 18:26:06,923 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:06,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2022-01-31 18:26:06,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3657, Invalid=3825, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 18:26:06,925 INFO L87 Difference]: Start difference. First operand 352 states and 438 transitions. Second operand has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 86 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:26:46,848 INFO L93 Difference]: Finished difference Result 876 states and 1219 transitions. [2022-01-31 18:26:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2022-01-31 18:26:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 86 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 347 [2022-01-31 18:26:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:26:46,850 INFO L225 Difference]: With dead ends: 876 [2022-01-31 18:26:46,850 INFO L226 Difference]: Without dead ends: 863 [2022-01-31 18:26:46,850 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3744, Invalid=3912, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:26:46,851 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 2472 mSDsluCounter, 645 mSDsCounter, 0 mSdLazyCounter, 952 mSolverCounterSat, 697 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2556 SdHoareTripleChecker+Valid, 750 SdHoareTripleChecker+Invalid, 1649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 697 IncrementalHoareTripleChecker+Valid, 952 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:26:46,851 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2556 Valid, 750 Invalid, 1649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [697 Valid, 952 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:26:46,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2022-01-31 18:26:47,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 356. [2022-01-31 18:26:47,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 350 states have (on average 1.2514285714285713) internal successors, (438), 350 states have internal predecessors, (438), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:26:47,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 443 transitions. [2022-01-31 18:26:47,437 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 443 transitions. Word has length 347 [2022-01-31 18:26:47,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:26:47,437 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 443 transitions. [2022-01-31 18:26:47,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.942528735632184) internal successors, (343), 86 states have internal predecessors, (343), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:26:47,438 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 443 transitions. [2022-01-31 18:26:47,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 352 [2022-01-31 18:26:47,439 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:26:47,439 INFO L514 BasicCegarLoop]: trace histogram [84, 84, 84, 84, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:26:47,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 18:26:47,439 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:26:47,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:26:47,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1787499149, now seen corresponding path program 84 times [2022-01-31 18:26:47,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:26:47,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119274951] [2022-01-31 18:26:47,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:26:47,444 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:26:47,444 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:26:47,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:26:47,466 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:26:47,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:49,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:26:49,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:26:49,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:26:49,996 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:26:49,996 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119274951] [2022-01-31 18:26:49,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [119274951] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:26:49,996 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:26:49,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [88] imperfect sequences [] total 88 [2022-01-31 18:26:49,996 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018278568] [2022-01-31 18:26:49,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:26:49,997 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2022-01-31 18:26:49,997 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:26:49,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2022-01-31 18:26:49,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3743, Invalid=3913, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 18:26:49,999 INFO L87 Difference]: Start difference. First operand 356 states and 443 transitions. Second operand has 88 states, 88 states have (on average 3.9431818181818183) internal successors, (347), 87 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:40,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:27:40,063 INFO L93 Difference]: Finished difference Result 886 states and 1233 transitions. [2022-01-31 18:27:40,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2022-01-31 18:27:40,064 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 3.9431818181818183) internal successors, (347), 87 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 351 [2022-01-31 18:27:40,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:27:40,066 INFO L225 Difference]: With dead ends: 886 [2022-01-31 18:27:40,066 INFO L226 Difference]: Without dead ends: 873 [2022-01-31 18:27:40,066 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3831, Invalid=4001, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:27:40,067 INFO L933 BasicCegarLoop]: 106 mSDtfsCounter, 2505 mSDsluCounter, 670 mSDsCounter, 0 mSdLazyCounter, 887 mSolverCounterSat, 708 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2590 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 1595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 708 IncrementalHoareTripleChecker+Valid, 887 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:27:40,067 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2590 Valid, 776 Invalid, 1595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [708 Valid, 887 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:27:40,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 873 states. [2022-01-31 18:27:40,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 873 to 360. [2022-01-31 18:27:40,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 354 states have (on average 1.2514124293785311) internal successors, (443), 354 states have internal predecessors, (443), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:27:40,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 448 transitions. [2022-01-31 18:27:40,712 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 448 transitions. Word has length 351 [2022-01-31 18:27:40,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:27:40,712 INFO L470 AbstractCegarLoop]: Abstraction has 360 states and 448 transitions. [2022-01-31 18:27:40,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 3.9431818181818183) internal successors, (347), 87 states have internal predecessors, (347), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:27:40,712 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 448 transitions. [2022-01-31 18:27:40,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 356 [2022-01-31 18:27:40,714 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:27:40,714 INFO L514 BasicCegarLoop]: trace histogram [85, 85, 85, 85, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:27:40,714 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 18:27:40,714 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:27:40,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:27:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1864728914, now seen corresponding path program 85 times [2022-01-31 18:27:40,714 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:27:40,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [21150697] [2022-01-31 18:27:40,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:27:40,717 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:27:40,717 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:27:40,717 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:27:40,733 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:27:40,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:43,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:27:43,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:27:43,406 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:27:43,407 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:27:43,407 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [21150697] [2022-01-31 18:27:43,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [21150697] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:27:43,407 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:27:43,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [89] imperfect sequences [] total 89 [2022-01-31 18:27:43,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505002] [2022-01-31 18:27:43,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:27:43,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2022-01-31 18:27:43,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:27:43,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2022-01-31 18:27:43,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3830, Invalid=4002, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 18:27:43,409 INFO L87 Difference]: Start difference. First operand 360 states and 448 transitions. Second operand has 89 states, 89 states have (on average 3.943820224719101) internal successors, (351), 88 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:37,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:28:37,665 INFO L93 Difference]: Finished difference Result 896 states and 1247 transitions. [2022-01-31 18:28:37,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2022-01-31 18:28:37,666 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 3.943820224719101) internal successors, (351), 88 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 355 [2022-01-31 18:28:37,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:28:37,668 INFO L225 Difference]: With dead ends: 896 [2022-01-31 18:28:37,668 INFO L226 Difference]: Without dead ends: 883 [2022-01-31 18:28:37,669 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3919, Invalid=4091, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:28:37,669 INFO L933 BasicCegarLoop]: 107 mSDtfsCounter, 2531 mSDsluCounter, 672 mSDsCounter, 0 mSdLazyCounter, 903 mSolverCounterSat, 722 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2617 SdHoareTripleChecker+Valid, 779 SdHoareTripleChecker+Invalid, 1625 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 722 IncrementalHoareTripleChecker+Valid, 903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:28:37,669 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2617 Valid, 779 Invalid, 1625 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [722 Valid, 903 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:28:37,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 883 states. [2022-01-31 18:28:38,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 883 to 364. [2022-01-31 18:28:38,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 364 states, 358 states have (on average 1.2513966480446927) internal successors, (448), 358 states have internal predecessors, (448), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:28:38,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 364 states to 364 states and 453 transitions. [2022-01-31 18:28:38,474 INFO L78 Accepts]: Start accepts. Automaton has 364 states and 453 transitions. Word has length 355 [2022-01-31 18:28:38,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:28:38,474 INFO L470 AbstractCegarLoop]: Abstraction has 364 states and 453 transitions. [2022-01-31 18:28:38,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 3.943820224719101) internal successors, (351), 88 states have internal predecessors, (351), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:28:38,475 INFO L276 IsEmpty]: Start isEmpty. Operand 364 states and 453 transitions. [2022-01-31 18:28:38,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 360 [2022-01-31 18:28:38,476 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:28:38,476 INFO L514 BasicCegarLoop]: trace histogram [86, 86, 86, 86, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:28:38,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 18:28:38,476 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:28:38,476 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:28:38,476 INFO L85 PathProgramCache]: Analyzing trace with hash 1347353193, now seen corresponding path program 86 times [2022-01-31 18:28:38,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:28:38,477 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [449296111] [2022-01-31 18:28:38,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:28:38,480 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:28:38,480 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:28:38,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:28:38,504 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:28:38,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:41,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:28:41,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:28:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:28:41,215 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:28:41,215 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [449296111] [2022-01-31 18:28:41,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [449296111] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:28:41,215 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:28:41,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [90] imperfect sequences [] total 90 [2022-01-31 18:28:41,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569956798] [2022-01-31 18:28:41,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:28:41,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-01-31 18:28:41,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:28:41,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-01-31 18:28:41,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3918, Invalid=4092, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 18:28:41,217 INFO L87 Difference]: Start difference. First operand 364 states and 453 transitions. Second operand has 90 states, 90 states have (on average 3.9444444444444446) internal successors, (355), 89 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:43,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:29:43,553 INFO L93 Difference]: Finished difference Result 906 states and 1261 transitions. [2022-01-31 18:29:43,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2022-01-31 18:29:43,553 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 3.9444444444444446) internal successors, (355), 89 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 359 [2022-01-31 18:29:43,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:29:43,555 INFO L225 Difference]: With dead ends: 906 [2022-01-31 18:29:43,555 INFO L226 Difference]: Without dead ends: 893 [2022-01-31 18:29:43,556 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=4008, Invalid=4182, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:29:43,556 INFO L933 BasicCegarLoop]: 108 mSDtfsCounter, 2437 mSDsluCounter, 678 mSDsCounter, 0 mSdLazyCounter, 919 mSolverCounterSat, 683 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2524 SdHoareTripleChecker+Valid, 786 SdHoareTripleChecker+Invalid, 1602 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 683 IncrementalHoareTripleChecker+Valid, 919 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 18:29:43,556 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2524 Valid, 786 Invalid, 1602 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [683 Valid, 919 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 18:29:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2022-01-31 18:29:44,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 368. [2022-01-31 18:29:44,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 362 states have (on average 1.2513812154696133) internal successors, (453), 362 states have internal predecessors, (453), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:29:44,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 458 transitions. [2022-01-31 18:29:44,455 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 458 transitions. Word has length 359 [2022-01-31 18:29:44,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:29:44,456 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 458 transitions. [2022-01-31 18:29:44,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 3.9444444444444446) internal successors, (355), 89 states have internal predecessors, (355), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:29:44,456 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 458 transitions. [2022-01-31 18:29:44,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 364 [2022-01-31 18:29:44,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:29:44,457 INFO L514 BasicCegarLoop]: trace histogram [87, 87, 87, 87, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:29:44,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 18:29:44,457 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:29:44,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:29:44,458 INFO L85 PathProgramCache]: Analyzing trace with hash 89727140, now seen corresponding path program 87 times [2022-01-31 18:29:44,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:29:44,458 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1399712664] [2022-01-31 18:29:44,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:29:44,460 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:29:44,460 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:29:44,460 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:29:44,479 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:29:44,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:47,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:29:47,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:29:47,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:29:47,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:29:47,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1399712664] [2022-01-31 18:29:47,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1399712664] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:29:47,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:29:47,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [91] imperfect sequences [] total 91 [2022-01-31 18:29:47,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377319008] [2022-01-31 18:29:47,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:29:47,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-01-31 18:29:47,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:29:47,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-01-31 18:29:47,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4007, Invalid=4183, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 18:29:47,232 INFO L87 Difference]: Start difference. First operand 368 states and 458 transitions. Second operand has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 90 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:56,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:30:56,784 INFO L93 Difference]: Finished difference Result 916 states and 1275 transitions. [2022-01-31 18:30:56,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2022-01-31 18:30:56,784 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 90 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 363 [2022-01-31 18:30:56,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:30:56,786 INFO L225 Difference]: With dead ends: 916 [2022-01-31 18:30:56,786 INFO L226 Difference]: Without dead ends: 903 [2022-01-31 18:30:56,787 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4098, Invalid=4274, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:30:56,787 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 2776 mSDsluCounter, 700 mSDsCounter, 0 mSdLazyCounter, 994 mSolverCounterSat, 797 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2864 SdHoareTripleChecker+Valid, 809 SdHoareTripleChecker+Invalid, 1791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 797 IncrementalHoareTripleChecker+Valid, 994 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:30:56,787 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2864 Valid, 809 Invalid, 1791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [797 Valid, 994 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:30:56,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 903 states. [2022-01-31 18:30:57,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 903 to 372. [2022-01-31 18:30:57,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 372 states, 366 states have (on average 1.2513661202185793) internal successors, (458), 366 states have internal predecessors, (458), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:30:57,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 372 states to 372 states and 463 transitions. [2022-01-31 18:30:57,694 INFO L78 Accepts]: Start accepts. Automaton has 372 states and 463 transitions. Word has length 363 [2022-01-31 18:30:57,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:30:57,694 INFO L470 AbstractCegarLoop]: Abstraction has 372 states and 463 transitions. [2022-01-31 18:30:57,695 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.9450549450549453) internal successors, (359), 90 states have internal predecessors, (359), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:30:57,695 INFO L276 IsEmpty]: Start isEmpty. Operand 372 states and 463 transitions. [2022-01-31 18:30:57,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 368 [2022-01-31 18:30:57,696 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:30:57,696 INFO L514 BasicCegarLoop]: trace histogram [88, 88, 88, 88, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:30:57,696 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 18:30:57,696 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:30:57,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:30:57,696 INFO L85 PathProgramCache]: Analyzing trace with hash 1075818847, now seen corresponding path program 88 times [2022-01-31 18:30:57,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:30:57,697 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [576838010] [2022-01-31 18:30:57,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:30:57,699 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:30:57,699 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:30:57,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:30:57,718 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:30:57,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:00,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:31:00,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:31:00,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:31:00,500 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:31:00,500 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [576838010] [2022-01-31 18:31:00,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [576838010] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:31:00,501 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:31:00,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [92] imperfect sequences [] total 92 [2022-01-31 18:31:00,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065552526] [2022-01-31 18:31:00,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:31:00,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2022-01-31 18:31:00,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:31:00,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2022-01-31 18:31:00,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4097, Invalid=4275, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 18:31:00,503 INFO L87 Difference]: Start difference. First operand 372 states and 463 transitions. Second operand has 92 states, 92 states have (on average 3.9456521739130435) internal successors, (363), 91 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:28,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 18:32:28,646 INFO L93 Difference]: Finished difference Result 926 states and 1289 transitions. [2022-01-31 18:32:28,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2022-01-31 18:32:28,647 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 3.9456521739130435) internal successors, (363), 91 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 367 [2022-01-31 18:32:28,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 18:32:28,648 INFO L225 Difference]: With dead ends: 926 [2022-01-31 18:32:28,649 INFO L226 Difference]: Without dead ends: 913 [2022-01-31 18:32:28,649 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=4189, Invalid=4367, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 18:32:28,649 INFO L933 BasicCegarLoop]: 110 mSDtfsCounter, 2091 mSDsluCounter, 720 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 566 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2180 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 1558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 566 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 18:32:28,649 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [2180 Valid, 830 Invalid, 1558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [566 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 18:32:28,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 913 states. [2022-01-31 18:32:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 913 to 376. [2022-01-31 18:32:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 376 states, 370 states have (on average 1.2513513513513514) internal successors, (463), 370 states have internal predecessors, (463), 3 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2022-01-31 18:32:30,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 376 states to 376 states and 468 transitions. [2022-01-31 18:32:30,125 INFO L78 Accepts]: Start accepts. Automaton has 376 states and 468 transitions. Word has length 367 [2022-01-31 18:32:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 18:32:30,126 INFO L470 AbstractCegarLoop]: Abstraction has 376 states and 468 transitions. [2022-01-31 18:32:30,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 3.9456521739130435) internal successors, (363), 91 states have internal predecessors, (363), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2022-01-31 18:32:30,126 INFO L276 IsEmpty]: Start isEmpty. Operand 376 states and 468 transitions. [2022-01-31 18:32:30,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 372 [2022-01-31 18:32:30,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 18:32:30,127 INFO L514 BasicCegarLoop]: trace histogram [89, 89, 89, 89, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 18:32:30,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 18:32:30,128 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 18:32:30,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 18:32:30,128 INFO L85 PathProgramCache]: Analyzing trace with hash -1620480870, now seen corresponding path program 89 times [2022-01-31 18:32:30,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 18:32:30,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [914221045] [2022-01-31 18:32:30,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 18:32:30,131 INFO L87 AcceleratorJordan]: Jordan loop acceleration statistics: -1 HavocedVariables, -1 AssignedVariables, -1 ReadonlyVariables, Eigenvalues: {}, 0 SequentialAcceleration, 0 AlternatingAcceleration, 0 QuantifierFreeResult [2022-01-31 18:32:30,131 WARN L89 AcceleratorJordan]: Jordan acceleration failed, because SIMULTANEOUS_UPDATE_FAILED [2022-01-31 18:32:30,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 18:32:30,161 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 18:32:30,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:34,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 18:32:34,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 18:32:34,183 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-01-31 18:32:34,183 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 18:32:34,183 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [914221045] [2022-01-31 18:32:34,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [914221045] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 18:32:34,183 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 18:32:34,183 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [93] imperfect sequences [] total 93 [2022-01-31 18:32:34,183 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438397165] [2022-01-31 18:32:34,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 18:32:34,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2022-01-31 18:32:34,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 18:32:34,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2022-01-31 18:32:34,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4280, Invalid=4462, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 18:32:34,186 INFO L87 Difference]: Start difference. First operand 376 states and 468 transitions. Second operand has 94 states, 93 states have (on average 3.946236559139785) internal successors, (367), 92 states have internal predecessors, (367), 3 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1)