/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-cav19/array_tiling_tcpy.c -------------------------------------------------------------------------------- This is Ultimate 0.2.2-dev-d966a43 [2022-01-31 19:54:51,574 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-01-31 19:54:51,576 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-01-31 19:54:51,618 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2022-01-31 19:54:51,632 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-01-31 19:54:51,632 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-01-31 19:54:51,633 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-01-31 19:54:51,634 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-01-31 19:54:51,634 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-01-31 19:54:51,635 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-01-31 19:54:51,636 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-01-31 19:54:51,637 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-01-31 19:54:51,638 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-01-31 19:54:51,652 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-01-31 19:54:51,652 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-01-31 19:54:51,653 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-01-31 19:54:51,654 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2022-01-31 19:54:51,659 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-01-31 19:54:51,660 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-01-31 19:54:51,660 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-01-31 19:54:51,664 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 19:54:51,669 INFO L113 SettingsManager]: Loading preferences was successful [2022-01-31 19:54:51,670 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-01-31 19:54:51,670 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-01-31 19:54:51,670 INFO L138 SettingsManager]: * sizeof long=4 [2022-01-31 19:54:51,670 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-01-31 19:54:51,671 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-01-31 19:54:51,671 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-01-31 19:54:51,671 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-01-31 19:54:51,671 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-01-31 19:54:51,671 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * sizeof long double=12 [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * Use constant arrays=true [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-01-31 19:54:51,672 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * To the following directory=./dump/ [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-01-31 19:54:51,672 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:54:51,673 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-01-31 19:54:51,673 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=AcceleratedInterpolation [2022-01-31 19:54:51,673 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-01-31 19:54:51,673 INFO L138 SettingsManager]: * Loop acceleration method that is used by accelerated interpolation=JORDAN [2022-01-31 19:54:51,673 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.core: Log level for class -> de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=WARN; [2022-01-31 19:54:51,842 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-01-31 19:54:51,867 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-01-31 19:54:51,868 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-01-31 19:54:51,869 INFO L271 PluginConnector]: Initializing CDTParser... [2022-01-31 19:54:51,870 INFO L275 PluginConnector]: CDTParser initialized [2022-01-31 19:54:51,871 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c [2022-01-31 19:54:51,933 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f300923/e103bc4628b045959b175e96608f6f35/FLAG15ec6c5c3 [2022-01-31 19:54:52,274 INFO L306 CDTParser]: Found 1 translation units. [2022-01-31 19:54:52,275 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/array-cav19/array_tiling_tcpy.c [2022-01-31 19:54:52,279 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f300923/e103bc4628b045959b175e96608f6f35/FLAG15ec6c5c3 [2022-01-31 19:54:52,290 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/01f300923/e103bc4628b045959b175e96608f6f35 [2022-01-31 19:54:52,292 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-01-31 19:54:52,293 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2022-01-31 19:54:52,294 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-01-31 19:54:52,294 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-01-31 19:54:52,297 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-01-31 19:54:52,297 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,298 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3538058c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52, skipping insertion in model container [2022-01-31 19:54:52,298 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,302 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-01-31 19:54:52,312 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-01-31 19:54:52,408 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-cav19/array_tiling_tcpy.c[408,421] [2022-01-31 19:54:52,455 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:54:52,459 INFO L203 MainTranslator]: Completed pre-run [2022-01-31 19:54:52,466 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-cav19/array_tiling_tcpy.c[408,421] [2022-01-31 19:54:52,471 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-01-31 19:54:52,479 INFO L208 MainTranslator]: Completed translation [2022-01-31 19:54:52,480 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52 WrapperNode [2022-01-31 19:54:52,480 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-01-31 19:54:52,480 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-01-31 19:54:52,480 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-01-31 19:54:52,481 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-01-31 19:54:52,489 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,489 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,494 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,495 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,499 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,505 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,507 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,508 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-01-31 19:54:52,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-01-31 19:54:52,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-01-31 19:54:52,508 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-01-31 19:54:52,515 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (1/1) ... [2022-01-31 19:54:52,520 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-01-31 19:54:52,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2022-01-31 19:54:52,545 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 19:54:52,552 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 19:54:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2022-01-31 19:54:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-01-31 19:54:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure reach_error [2022-01-31 19:54:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2022-01-31 19:54:52,574 INFO L138 BoogieDeclarations]: Found implementation of procedure __VERIFIER_assert [2022-01-31 19:54:52,575 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2022-01-31 19:54:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure abort [2022-01-31 19:54:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure __assert_fail [2022-01-31 19:54:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure reach_error [2022-01-31 19:54:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-01-31 19:54:52,575 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2022-01-31 19:54:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_assert [2022-01-31 19:54:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2022-01-31 19:54:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure main [2022-01-31 19:54:52,576 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-01-31 19:54:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-01-31 19:54:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-01-31 19:54:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-01-31 19:54:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2022-01-31 19:54:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-01-31 19:54:52,577 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-01-31 19:54:52,629 INFO L234 CfgBuilder]: Building ICFG [2022-01-31 19:54:52,630 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2022-01-31 19:54:52,786 INFO L275 CfgBuilder]: Performing block encoding [2022-01-31 19:54:52,790 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-01-31 19:54:52,790 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2022-01-31 19:54:52,791 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:54:52 BoogieIcfgContainer [2022-01-31 19:54:52,792 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-01-31 19:54:52,793 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-01-31 19:54:52,793 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-01-31 19:54:52,809 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-01-31 19:54:52,809 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.01 07:54:52" (1/3) ... [2022-01-31 19:54:52,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78e93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:54:52, skipping insertion in model container [2022-01-31 19:54:52,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.01 07:54:52" (2/3) ... [2022-01-31 19:54:52,810 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5c78e93e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.01 07:54:52, skipping insertion in model container [2022-01-31 19:54:52,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.01 07:54:52" (3/3) ... [2022-01-31 19:54:52,811 INFO L111 eAbstractionObserver]: Analyzing ICFG array_tiling_tcpy.c [2022-01-31 19:54:52,828 INFO L205 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:AcceleratedInterpolation Determinization: PREDICATE_ABSTRACTION [2022-01-31 19:54:52,829 INFO L164 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-01-31 19:54:52,866 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-01-31 19:54:52,870 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 19:54:52,870 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2022-01-31 19:54:52,879 INFO L276 IsEmpty]: Start isEmpty. Operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:54:52,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 19:54:52,885 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:52,885 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:52,886 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:52,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:52,889 INFO L85 PathProgramCache]: Analyzing trace with hash -250895125, now seen corresponding path program 1 times [2022-01-31 19:54:52,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:52,895 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1119497684] [2022-01-31 19:54:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:52,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:52,934 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:53,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:53,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,020 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:53,021 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:53,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1119497684] [2022-01-31 19:54:53,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1119497684] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:53,023 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:53,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-01-31 19:54:53,024 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962744423] [2022-01-31 19:54:53,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:53,027 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-01-31 19:54:53,027 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:53,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-01-31 19:54:53,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-01-31 19:54:53,049 INFO L87 Difference]: Start difference. First operand has 31 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 5 states have call successors, (5), 4 states have call predecessors, (5), 4 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) Second operand has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 19:54:53,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:53,108 INFO L93 Difference]: Finished difference Result 55 states and 69 transitions. [2022-01-31 19:54:53,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-01-31 19:54:53,110 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 24 [2022-01-31 19:54:53,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:53,117 INFO L225 Difference]: With dead ends: 55 [2022-01-31 19:54:53,117 INFO L226 Difference]: Without dead ends: 26 [2022-01-31 19:54:53,119 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 9 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 19:54:53,123 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 20 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 5 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 5 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:53,123 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [23 Valid, 33 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 5 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2022-01-31 19:54:53,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2022-01-31 19:54:53,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2022-01-31 19:54:53,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 19:54:53,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2022-01-31 19:54:53,156 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 24 [2022-01-31 19:54:53,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:53,156 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2022-01-31 19:54:53,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.333333333333333) internal successors, (13), 2 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 19:54:53,156 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2022-01-31 19:54:53,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2022-01-31 19:54:53,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:53,158 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:53,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-01-31 19:54:53,159 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:53,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash -570898901, now seen corresponding path program 1 times [2022-01-31 19:54:53,161 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:53,161 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777566339] [2022-01-31 19:54:53,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:53,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:53,171 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:53,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:53,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:53,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,317 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:53,318 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:53,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777566339] [2022-01-31 19:54:53,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777566339] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:53,318 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:53,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-01-31 19:54:53,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292637513] [2022-01-31 19:54:53,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:53,319 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-01-31 19:54:53,319 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:53,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-01-31 19:54:53,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-01-31 19:54:53,320 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 19:54:53,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:53,425 INFO L93 Difference]: Finished difference Result 44 states and 48 transitions. [2022-01-31 19:54:53,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2022-01-31 19:54:53,425 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 24 [2022-01-31 19:54:53,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:53,427 INFO L225 Difference]: With dead ends: 44 [2022-01-31 19:54:53,427 INFO L226 Difference]: Without dead ends: 32 [2022-01-31 19:54:53,430 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:54:53,432 INFO L933 BasicCegarLoop]: 20 mSDtfsCounter, 26 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 79 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 37 SdHoareTripleChecker+Invalid, 91 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 79 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:53,432 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [29 Valid, 37 Invalid, 91 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 79 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:54:53,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2022-01-31 19:54:53,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 27. [2022-01-31 19:54:53,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 19:54:53,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 29 transitions. [2022-01-31 19:54:53,447 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 29 transitions. Word has length 24 [2022-01-31 19:54:53,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:53,450 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 29 transitions. [2022-01-31 19:54:53,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 5 states have internal predecessors, (13), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 19:54:53,454 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 29 transitions. [2022-01-31 19:54:53,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2022-01-31 19:54:53,455 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:53,456 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:53,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-01-31 19:54:53,456 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:53,456 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:53,456 INFO L85 PathProgramCache]: Analyzing trace with hash 1004158473, now seen corresponding path program 1 times [2022-01-31 19:54:53,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:53,457 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1242456085] [2022-01-31 19:54:53,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:53,457 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:53,460 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:53,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:53,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:53,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,597 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-01-31 19:54:53,598 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:53,598 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1242456085] [2022-01-31 19:54:53,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1242456085] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:53,598 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:53,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2022-01-31 19:54:53,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651922439] [2022-01-31 19:54:53,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:53,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2022-01-31 19:54:53,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:53,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2022-01-31 19:54:53,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2022-01-31 19:54:53,600 INFO L87 Difference]: Start difference. First operand 27 states and 29 transitions. Second operand has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 19:54:53,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:53,733 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2022-01-31 19:54:53,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-01-31 19:54:53,733 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 26 [2022-01-31 19:54:53,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:53,734 INFO L225 Difference]: With dead ends: 48 [2022-01-31 19:54:53,735 INFO L226 Difference]: Without dead ends: 37 [2022-01-31 19:54:53,735 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2022-01-31 19:54:53,740 INFO L933 BasicCegarLoop]: 18 mSDtfsCounter, 43 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 100 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 100 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:53,741 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [44 Valid, 40 Invalid, 127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 100 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:54:53,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2022-01-31 19:54:53,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 29. [2022-01-31 19:54:53,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 5 states have call successors, (5), 4 states have call predecessors, (5), 3 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2022-01-31 19:54:53,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 31 transitions. [2022-01-31 19:54:53,756 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 31 transitions. Word has length 26 [2022-01-31 19:54:53,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:53,756 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 31 transitions. [2022-01-31 19:54:53,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.25) internal successors, (18), 6 states have internal predecessors, (18), 3 states have call successors, (5), 3 states have call predecessors, (5), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2022-01-31 19:54:53,756 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 31 transitions. [2022-01-31 19:54:53,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2022-01-31 19:54:53,757 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:53,758 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:53,758 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-01-31 19:54:53,758 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:53,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:53,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1489160601, now seen corresponding path program 2 times [2022-01-31 19:54:53,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:53,758 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [807396866] [2022-01-31 19:54:53,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:53,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:53,760 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:53,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:53,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:53,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:53,974 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:53,974 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:53,974 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [807396866] [2022-01-31 19:54:53,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [807396866] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:53,974 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:53,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2022-01-31 19:54:53,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817357139] [2022-01-31 19:54:53,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:53,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-01-31 19:54:53,975 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:53,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-01-31 19:54:53,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2022-01-31 19:54:53,975 INFO L87 Difference]: Start difference. First operand 29 states and 31 transitions. Second operand has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 19:54:54,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:54,236 INFO L93 Difference]: Finished difference Result 44 states and 47 transitions. [2022-01-31 19:54:54,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-01-31 19:54:54,237 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 28 [2022-01-31 19:54:54,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:54,237 INFO L225 Difference]: With dead ends: 44 [2022-01-31 19:54:54,237 INFO L226 Difference]: Without dead ends: 42 [2022-01-31 19:54:54,238 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:54:54,238 INFO L933 BasicCegarLoop]: 21 mSDtfsCounter, 41 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 199 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 199 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:54,239 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [43 Valid, 55 Invalid, 228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 199 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:54:54,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2022-01-31 19:54:54,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 35. [2022-01-31 19:54:54,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 25 states have internal predecessors, (26), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (5), 4 states have call predecessors, (5), 5 states have call successors, (5) [2022-01-31 19:54:54,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 37 transitions. [2022-01-31 19:54:54,246 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 37 transitions. Word has length 28 [2022-01-31 19:54:54,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:54,246 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 37 transitions. [2022-01-31 19:54:54,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 1.8888888888888888) internal successors, (17), 8 states have internal predecessors, (17), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2022-01-31 19:54:54,246 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 37 transitions. [2022-01-31 19:54:54,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2022-01-31 19:54:54,247 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:54,247 INFO L514 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:54,247 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-01-31 19:54:54,247 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:54,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:54,247 INFO L85 PathProgramCache]: Analyzing trace with hash -1914575047, now seen corresponding path program 1 times [2022-01-31 19:54:54,248 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:54,248 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [517331278] [2022-01-31 19:54:54,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:54,248 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:54,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:54,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:54,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:54,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:54,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 19:54:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,425 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:54,425 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:54,425 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [517331278] [2022-01-31 19:54:54,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [517331278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:54,425 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:54,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [12] imperfect sequences [] total 12 [2022-01-31 19:54:54,425 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319552721] [2022-01-31 19:54:54,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:54,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2022-01-31 19:54:54,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:54,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2022-01-31 19:54:54,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=106, Unknown=0, NotChecked=0, Total=132 [2022-01-31 19:54:54,427 INFO L87 Difference]: Start difference. First operand 35 states and 37 transitions. Second operand has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 19:54:54,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:54,690 INFO L93 Difference]: Finished difference Result 48 states and 50 transitions. [2022-01-31 19:54:54,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:54:54,691 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 36 [2022-01-31 19:54:54,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:54,694 INFO L225 Difference]: With dead ends: 48 [2022-01-31 19:54:54,694 INFO L226 Difference]: Without dead ends: 46 [2022-01-31 19:54:54,695 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:54:54,695 INFO L933 BasicCegarLoop]: 24 mSDtfsCounter, 38 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 59 SdHoareTripleChecker+Invalid, 253 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:54,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [40 Valid, 59 Invalid, 253 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:54:54,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2022-01-31 19:54:54,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 43. [2022-01-31 19:54:54,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 31 states have internal predecessors, (32), 7 states have call successors, (7), 6 states have call predecessors, (7), 5 states have return successors, (6), 5 states have call predecessors, (6), 6 states have call successors, (6) [2022-01-31 19:54:54,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2022-01-31 19:54:54,707 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 36 [2022-01-31 19:54:54,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:54,707 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2022-01-31 19:54:54,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 11 states have (on average 2.090909090909091) internal successors, (23), 10 states have internal predecessors, (23), 3 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2022-01-31 19:54:54,707 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2022-01-31 19:54:54,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2022-01-31 19:54:54,708 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:54,708 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:54,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-01-31 19:54:54,708 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:54,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:54,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1022993931, now seen corresponding path program 2 times [2022-01-31 19:54:54,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:54,709 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1549769779] [2022-01-31 19:54:54,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:54,709 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:54,710 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:54,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:54,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 19:54:54,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:54,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:54:54,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:55,002 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:55,002 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1549769779] [2022-01-31 19:54:55,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1549769779] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:55,002 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:55,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:54:55,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184431906] [2022-01-31 19:54:55,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:55,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:54:55,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:55,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:54:55,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:54:55,004 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 19:54:55,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:55,499 INFO L93 Difference]: Finished difference Result 69 states and 75 transitions. [2022-01-31 19:54:55,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:54:55,499 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 44 [2022-01-31 19:54:55,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:55,501 INFO L225 Difference]: With dead ends: 69 [2022-01-31 19:54:55,501 INFO L226 Difference]: Without dead ends: 67 [2022-01-31 19:54:55,501 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=145, Invalid=785, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:54:55,502 INFO L933 BasicCegarLoop]: 25 mSDtfsCounter, 51 mSDsluCounter, 47 mSDsCounter, 0 mSdLazyCounter, 387 mSolverCounterSat, 40 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 54 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 40 IncrementalHoareTripleChecker+Valid, 387 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:55,502 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [54 Valid, 72 Invalid, 427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [40 Valid, 387 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:54:55,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2022-01-31 19:54:55,530 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 60. [2022-01-31 19:54:55,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 43 states have (on average 1.069767441860465) internal successors, (46), 45 states have internal predecessors, (46), 10 states have call successors, (10), 7 states have call predecessors, (10), 6 states have return successors, (9), 7 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:54:55,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 65 transitions. [2022-01-31 19:54:55,533 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 65 transitions. Word has length 44 [2022-01-31 19:54:55,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:55,533 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 65 transitions. [2022-01-31 19:54:55,533 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 12 states have internal predecessors, (26), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 19:54:55,534 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 65 transitions. [2022-01-31 19:54:55,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2022-01-31 19:54:55,538 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:55,538 INFO L514 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:55,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-01-31 19:54:55,538 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:55,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:55,539 INFO L85 PathProgramCache]: Analyzing trace with hash -417430807, now seen corresponding path program 3 times [2022-01-31 19:54:55,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:55,539 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1758734051] [2022-01-31 19:54:55,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:55,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:55,540 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:55,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:55,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:55,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:55,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 19:54:55,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:54:55,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:55,906 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:55,906 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:55,906 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1758734051] [2022-01-31 19:54:55,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1758734051] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:55,906 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:55,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-01-31 19:54:55,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79786392] [2022-01-31 19:54:55,906 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:55,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-01-31 19:54:55,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:55,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-01-31 19:54:55,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2022-01-31 19:54:55,907 INFO L87 Difference]: Start difference. First operand 60 states and 65 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 19:54:56,342 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:56,342 INFO L93 Difference]: Finished difference Result 79 states and 85 transitions. [2022-01-31 19:54:56,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:54:56,343 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) Word has length 46 [2022-01-31 19:54:56,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:56,344 INFO L225 Difference]: With dead ends: 79 [2022-01-31 19:54:56,344 INFO L226 Difference]: Without dead ends: 77 [2022-01-31 19:54:56,345 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=111, Invalid=591, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:54:56,345 INFO L933 BasicCegarLoop]: 32 mSDtfsCounter, 48 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 512 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 76 SdHoareTripleChecker+Invalid, 559 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:56,345 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [51 Valid, 76 Invalid, 559 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [47 Valid, 512 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:54:56,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2022-01-31 19:54:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2022-01-31 19:54:56,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 37 states have internal predecessors, (38), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:54:56,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 53 transitions. [2022-01-31 19:54:56,355 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 53 transitions. Word has length 46 [2022-01-31 19:54:56,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:56,355 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 53 transitions. [2022-01-31 19:54:56,359 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 12 states have internal predecessors, (28), 4 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 3 states have call predecessors, (5), 3 states have call successors, (5) [2022-01-31 19:54:56,359 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 53 transitions. [2022-01-31 19:54:56,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2022-01-31 19:54:56,360 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:56,361 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:56,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-01-31 19:54:56,361 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:56,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:56,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1335259869, now seen corresponding path program 4 times [2022-01-31 19:54:56,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:56,361 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [887122849] [2022-01-31 19:54:56,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:56,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:56,363 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,809 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:56,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,813 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:56,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:56,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,819 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 24 [2022-01-31 19:54:56,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,822 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:54:56,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,825 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:54:56,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:56,827 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:56,827 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:56,827 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [887122849] [2022-01-31 19:54:56,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [887122849] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:56,828 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:56,828 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:54:56,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520049875] [2022-01-31 19:54:56,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:56,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:54:56,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:56,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:54:56,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=199, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:54:56,829 INFO L87 Difference]: Start difference. First operand 51 states and 53 transitions. Second operand has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 19:54:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:57,393 INFO L93 Difference]: Finished difference Result 77 states and 83 transitions. [2022-01-31 19:54:57,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:54:57,393 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 52 [2022-01-31 19:54:57,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:57,394 INFO L225 Difference]: With dead ends: 77 [2022-01-31 19:54:57,394 INFO L226 Difference]: Without dead ends: 54 [2022-01-31 19:54:57,395 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:54:57,395 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 60 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 373 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 63 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 424 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 373 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:57,395 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [63 Valid, 69 Invalid, 424 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 373 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:54:57,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2022-01-31 19:54:57,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2022-01-31 19:54:57,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 39 states have internal predecessors, (40), 8 states have call successors, (8), 7 states have call predecessors, (8), 6 states have return successors, (7), 6 states have call predecessors, (7), 7 states have call successors, (7) [2022-01-31 19:54:57,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 55 transitions. [2022-01-31 19:54:57,405 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 55 transitions. Word has length 52 [2022-01-31 19:54:57,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:57,406 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 55 transitions. [2022-01-31 19:54:57,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.9333333333333333) internal successors, (29), 14 states have internal predecessors, (29), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 19:54:57,406 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 55 transitions. [2022-01-31 19:54:57,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2022-01-31 19:54:57,406 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:57,406 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:57,406 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-01-31 19:54:57,407 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:57,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:57,407 INFO L85 PathProgramCache]: Analyzing trace with hash -126381637, now seen corresponding path program 5 times [2022-01-31 19:54:57,407 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:57,407 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151504678] [2022-01-31 19:54:57,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:57,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:57,408 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:57,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:57,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,812 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:57,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:57,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,816 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 19:54:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:54:57,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,820 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:54:57,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:57,823 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:57,823 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151504678] [2022-01-31 19:54:57,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151504678] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:57,823 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:57,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2022-01-31 19:54:57,824 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793723667] [2022-01-31 19:54:57,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:57,824 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-01-31 19:54:57,824 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:57,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-01-31 19:54:57,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2022-01-31 19:54:57,825 INFO L87 Difference]: Start difference. First operand 53 states and 55 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 19:54:58,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:58,277 INFO L93 Difference]: Finished difference Result 83 states and 90 transitions. [2022-01-31 19:54:58,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-01-31 19:54:58,277 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 54 [2022-01-31 19:54:58,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:58,278 INFO L225 Difference]: With dead ends: 83 [2022-01-31 19:54:58,278 INFO L226 Difference]: Without dead ends: 81 [2022-01-31 19:54:58,279 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:54:58,279 INFO L933 BasicCegarLoop]: 27 mSDtfsCounter, 71 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 391 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 67 SdHoareTripleChecker+Invalid, 444 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:58,280 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 67 Invalid, 444 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 391 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:54:58,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2022-01-31 19:54:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2022-01-31 19:54:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 54 states have (on average 1.0555555555555556) internal successors, (57), 56 states have internal predecessors, (57), 12 states have call successors, (12), 8 states have call predecessors, (12), 7 states have return successors, (11), 9 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 19:54:58,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 80 transitions. [2022-01-31 19:54:58,302 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 80 transitions. Word has length 54 [2022-01-31 19:54:58,302 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:58,302 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 80 transitions. [2022-01-31 19:54:58,302 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 14 states have internal predecessors, (31), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 19:54:58,303 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 80 transitions. [2022-01-31 19:54:58,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2022-01-31 19:54:58,304 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:58,304 INFO L514 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:58,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-01-31 19:54:58,304 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:58,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:58,304 INFO L85 PathProgramCache]: Analyzing trace with hash -309563111, now seen corresponding path program 6 times [2022-01-31 19:54:58,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:58,305 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1417012325] [2022-01-31 19:54:58,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:58,305 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:58,306 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:58,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,676 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:58,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:58,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:58,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 19:54:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:54:58,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,698 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:54:58,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:58,704 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:58,704 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:58,704 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1417012325] [2022-01-31 19:54:58,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1417012325] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:58,705 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:58,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:54:58,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464190945] [2022-01-31 19:54:58,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:58,707 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:54:58,707 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:58,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:54:58,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=175, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:54:58,708 INFO L87 Difference]: Start difference. First operand 74 states and 80 transitions. Second operand has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 19:54:59,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:54:59,239 INFO L93 Difference]: Finished difference Result 93 states and 100 transitions. [2022-01-31 19:54:59,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2022-01-31 19:54:59,239 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2022-01-31 19:54:59,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:54:59,240 INFO L225 Difference]: With dead ends: 93 [2022-01-31 19:54:59,240 INFO L226 Difference]: Without dead ends: 91 [2022-01-31 19:54:59,241 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=112, Invalid=644, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:54:59,241 INFO L933 BasicCegarLoop]: 36 mSDtfsCounter, 59 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 614 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 667 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 614 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:54:59,242 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [62 Valid, 81 Invalid, 667 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 614 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:54:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2022-01-31 19:54:59,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 61. [2022-01-31 19:54:59,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 45 states have internal predecessors, (46), 9 states have call successors, (9), 8 states have call predecessors, (9), 7 states have return successors, (8), 7 states have call predecessors, (8), 8 states have call successors, (8) [2022-01-31 19:54:59,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 63 transitions. [2022-01-31 19:54:59,257 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 63 transitions. Word has length 56 [2022-01-31 19:54:59,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:54:59,257 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 63 transitions. [2022-01-31 19:54:59,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 2.357142857142857) internal successors, (33), 13 states have internal predecessors, (33), 5 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 4 states have call predecessors, (6), 4 states have call successors, (6) [2022-01-31 19:54:59,257 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 63 transitions. [2022-01-31 19:54:59,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2022-01-31 19:54:59,258 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:54:59,258 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:54:59,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-01-31 19:54:59,258 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:54:59,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:54:59,258 INFO L85 PathProgramCache]: Analyzing trace with hash -16404851, now seen corresponding path program 7 times [2022-01-31 19:54:59,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:54:59,258 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1731939436] [2022-01-31 19:54:59,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:54:59,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:54:59,259 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:54:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,694 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:54:59,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:54:59,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:54:59,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 19:54:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:54:59,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:54:59,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:54:59,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:54:59,735 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:54:59,735 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:54:59,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1731939436] [2022-01-31 19:54:59,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1731939436] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:54:59,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:54:59,735 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:54:59,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1510722460] [2022-01-31 19:54:59,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:54:59,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:54:59,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:54:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:54:59,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:54:59,736 INFO L87 Difference]: Start difference. First operand 61 states and 63 transitions. Second operand has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 19:55:00,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:00,625 INFO L93 Difference]: Finished difference Result 95 states and 103 transitions. [2022-01-31 19:55:00,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-01-31 19:55:00,625 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2022-01-31 19:55:00,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:00,626 INFO L225 Difference]: With dead ends: 95 [2022-01-31 19:55:00,626 INFO L226 Difference]: Without dead ends: 93 [2022-01-31 19:55:00,626 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=161, Invalid=1171, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:55:00,627 INFO L933 BasicCegarLoop]: 29 mSDtfsCounter, 58 mSDsluCounter, 59 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 50 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 61 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 50 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:00,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [61 Valid, 88 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [50 Valid, 662 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:55:00,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2022-01-31 19:55:00,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 86. [2022-01-31 19:55:00,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 65 states have internal predecessors, (66), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 19:55:00,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 93 transitions. [2022-01-31 19:55:00,650 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 93 transitions. Word has length 62 [2022-01-31 19:55:00,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:00,663 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 93 transitions. [2022-01-31 19:55:00,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0) internal successors, (34), 16 states have internal predecessors, (34), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 19:55:00,663 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 93 transitions. [2022-01-31 19:55:00,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2022-01-31 19:55:00,663 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:00,663 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:00,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-01-31 19:55:00,664 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:00,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:00,664 INFO L85 PathProgramCache]: Analyzing trace with hash -1377021973, now seen corresponding path program 8 times [2022-01-31 19:55:00,664 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:00,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352074260] [2022-01-31 19:55:00,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:00,664 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:00,665 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:00,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:01,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:01,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:01,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 19:55:01,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:01,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:01,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:01,072 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:01,072 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:01,072 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352074260] [2022-01-31 19:55:01,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1352074260] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:01,072 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:01,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:55:01,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25954965] [2022-01-31 19:55:01,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:01,073 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:55:01,073 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:01,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:55:01,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:55:01,073 INFO L87 Difference]: Start difference. First operand 86 states and 93 transitions. Second operand has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 19:55:02,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:02,060 INFO L93 Difference]: Finished difference Result 120 states and 133 transitions. [2022-01-31 19:55:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:55:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 64 [2022-01-31 19:55:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:02,062 INFO L225 Difference]: With dead ends: 120 [2022-01-31 19:55:02,062 INFO L226 Difference]: Without dead ends: 118 [2022-01-31 19:55:02,063 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=216, Invalid=1590, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 19:55:02,063 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 64 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 979 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1048 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 979 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:02,063 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 99 Invalid, 1048 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 979 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:55:02,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2022-01-31 19:55:02,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2022-01-31 19:55:02,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 67 states have internal predecessors, (69), 14 states have call successors, (14), 9 states have call predecessors, (14), 8 states have return successors, (13), 11 states have call predecessors, (13), 13 states have call successors, (13) [2022-01-31 19:55:02,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 96 transitions. [2022-01-31 19:55:02,086 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 96 transitions. Word has length 64 [2022-01-31 19:55:02,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:02,086 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 96 transitions. [2022-01-31 19:55:02,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 19:55:02,086 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 96 transitions. [2022-01-31 19:55:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2022-01-31 19:55:02,087 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:02,087 INFO L514 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 4, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:02,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-01-31 19:55:02,087 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:02,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:02,088 INFO L85 PathProgramCache]: Analyzing trace with hash 1034949065, now seen corresponding path program 9 times [2022-01-31 19:55:02,088 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:02,088 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [841917999] [2022-01-31 19:55:02,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:02,088 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:02,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:02,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:02,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:02,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:02,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:02,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:02,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:02,411 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:02,412 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [841917999] [2022-01-31 19:55:02,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [841917999] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:02,412 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:02,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:55:02,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731794203] [2022-01-31 19:55:02,412 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:02,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:55:02,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:02,412 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:55:02,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:55:02,413 INFO L87 Difference]: Start difference. First operand 88 states and 96 transitions. Second operand has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 19:55:03,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:03,198 INFO L93 Difference]: Finished difference Result 108 states and 117 transitions. [2022-01-31 19:55:03,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:55:03,199 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 66 [2022-01-31 19:55:03,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:03,200 INFO L225 Difference]: With dead ends: 108 [2022-01-31 19:55:03,200 INFO L226 Difference]: Without dead ends: 106 [2022-01-31 19:55:03,201 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1259, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:55:03,201 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 62 mSDsCounter, 0 mSdLazyCounter, 1128 mSolverCounterSat, 67 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 104 SdHoareTripleChecker+Invalid, 1195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 67 IncrementalHoareTripleChecker+Valid, 1128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:03,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 104 Invalid, 1195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [67 Valid, 1128 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:55:03,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2022-01-31 19:55:03,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 69. [2022-01-31 19:55:03,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 50 states have (on average 1.04) internal successors, (52), 51 states have internal predecessors, (52), 10 states have call successors, (10), 9 states have call predecessors, (10), 8 states have return successors, (9), 8 states have call predecessors, (9), 9 states have call successors, (9) [2022-01-31 19:55:03,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 71 transitions. [2022-01-31 19:55:03,220 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 71 transitions. Word has length 66 [2022-01-31 19:55:03,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:03,220 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 71 transitions. [2022-01-31 19:55:03,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.235294117647059) internal successors, (38), 16 states have internal predecessors, (38), 6 states have call successors, (9), 3 states have call predecessors, (9), 1 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2022-01-31 19:55:03,221 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 71 transitions. [2022-01-31 19:55:03,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2022-01-31 19:55:03,223 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:03,223 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:03,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-01-31 19:55:03,224 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:03,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:03,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1277503137, now seen corresponding path program 10 times [2022-01-31 19:55:03,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:03,224 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1765425877] [2022-01-31 19:55:03,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:03,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:03,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:03,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,702 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:03,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:03,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 19:55:03,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:55:03,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:55:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:55:03,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:55:03,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:03,729 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:03,729 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:03,729 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1765425877] [2022-01-31 19:55:03,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1765425877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:03,730 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:03,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:55:03,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163909205] [2022-01-31 19:55:03,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:03,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:55:03,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:03,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:55:03,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:55:03,731 INFO L87 Difference]: Start difference. First operand 69 states and 71 transitions. Second operand has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:04,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:04,447 INFO L93 Difference]: Finished difference Result 111 states and 121 transitions. [2022-01-31 19:55:04,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:55:04,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 70 [2022-01-31 19:55:04,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:04,450 INFO L225 Difference]: With dead ends: 111 [2022-01-31 19:55:04,450 INFO L226 Difference]: Without dead ends: 109 [2022-01-31 19:55:04,451 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1237, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:55:04,451 INFO L933 BasicCegarLoop]: 31 mSDtfsCounter, 87 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 536 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 621 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:04,451 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 69 Invalid, 621 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 536 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:55:04,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2022-01-31 19:55:04,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 98. [2022-01-31 19:55:04,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 72 states have (on average 1.0416666666666667) internal successors, (75), 74 states have internal predecessors, (75), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 19:55:04,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 106 transitions. [2022-01-31 19:55:04,477 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 106 transitions. Word has length 70 [2022-01-31 19:55:04,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:04,477 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 106 transitions. [2022-01-31 19:55:04,477 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:04,478 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 106 transitions. [2022-01-31 19:55:04,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2022-01-31 19:55:04,478 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:04,478 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:04,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-01-31 19:55:04,478 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:04,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:04,478 INFO L85 PathProgramCache]: Analyzing trace with hash -1749992259, now seen corresponding path program 11 times [2022-01-31 19:55:04,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:04,479 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [313821126] [2022-01-31 19:55:04,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:04,479 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:04,480 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:04,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:04,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:04,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:04,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 19:55:04,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:04,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:04,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:04,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:04,980 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:04,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:04,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [313821126] [2022-01-31 19:55:04,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [313821126] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:04,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:04,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:55:04,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850540813] [2022-01-31 19:55:04,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:04,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:55:04,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:04,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:55:04,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:55:04,982 INFO L87 Difference]: Start difference. First operand 98 states and 106 transitions. Second operand has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:05,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:05,765 INFO L93 Difference]: Finished difference Result 140 states and 156 transitions. [2022-01-31 19:55:05,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-01-31 19:55:05,766 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 72 [2022-01-31 19:55:05,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:05,767 INFO L225 Difference]: With dead ends: 140 [2022-01-31 19:55:05,767 INFO L226 Difference]: Without dead ends: 138 [2022-01-31 19:55:05,767 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 19:55:05,768 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 87 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 858 mSolverCounterSat, 90 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 948 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 90 IncrementalHoareTripleChecker+Valid, 858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:05,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 90 Invalid, 948 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [90 Valid, 858 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:55:05,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2022-01-31 19:55:05,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 100. [2022-01-31 19:55:05,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 74 states have (on average 1.054054054054054) internal successors, (78), 76 states have internal predecessors, (78), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 19:55:05,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 109 transitions. [2022-01-31 19:55:05,795 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 109 transitions. Word has length 72 [2022-01-31 19:55:05,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:05,795 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 109 transitions. [2022-01-31 19:55:05,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:05,795 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 109 transitions. [2022-01-31 19:55:05,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2022-01-31 19:55:05,795 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:05,796 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:05,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-01-31 19:55:05,796 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:05,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:05,796 INFO L85 PathProgramCache]: Analyzing trace with hash -545505125, now seen corresponding path program 12 times [2022-01-31 19:55:05,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:05,796 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2146979334] [2022-01-31 19:55:05,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:05,796 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:05,797 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:05,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:06,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:06,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:06,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:06,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:06,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:06,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:06,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:06,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:06,220 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:06,220 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:06,220 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2146979334] [2022-01-31 19:55:06,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2146979334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:06,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:06,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2022-01-31 19:55:06,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588032283] [2022-01-31 19:55:06,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:06,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2022-01-31 19:55:06,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:06,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2022-01-31 19:55:06,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2022-01-31 19:55:06,221 INFO L87 Difference]: Start difference. First operand 100 states and 109 transitions. Second operand has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:07,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:07,010 INFO L93 Difference]: Finished difference Result 139 states and 155 transitions. [2022-01-31 19:55:07,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-01-31 19:55:07,011 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 74 [2022-01-31 19:55:07,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:07,012 INFO L225 Difference]: With dead ends: 139 [2022-01-31 19:55:07,012 INFO L226 Difference]: Without dead ends: 137 [2022-01-31 19:55:07,012 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=1512, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 19:55:07,013 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 69 mSDsluCounter, 58 mSDsCounter, 0 mSdLazyCounter, 1045 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 1114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 1045 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:07,013 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 101 Invalid, 1114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 1045 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 19:55:07,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2022-01-31 19:55:07,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 102. [2022-01-31 19:55:07,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 76 states have (on average 1.0657894736842106) internal successors, (81), 78 states have internal predecessors, (81), 16 states have call successors, (16), 10 states have call predecessors, (16), 9 states have return successors, (15), 13 states have call predecessors, (15), 15 states have call successors, (15) [2022-01-31 19:55:07,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 112 transitions. [2022-01-31 19:55:07,044 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 112 transitions. Word has length 74 [2022-01-31 19:55:07,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:07,045 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 112 transitions. [2022-01-31 19:55:07,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 2.1578947368421053) internal successors, (41), 18 states have internal predecessors, (41), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:07,045 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 112 transitions. [2022-01-31 19:55:07,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2022-01-31 19:55:07,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:07,046 INFO L514 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 5, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:07,046 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-01-31 19:55:07,046 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:07,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:07,046 INFO L85 PathProgramCache]: Analyzing trace with hash 1620428025, now seen corresponding path program 13 times [2022-01-31 19:55:07,046 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:07,046 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [266536651] [2022-01-31 19:55:07,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:07,046 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:07,047 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:07,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:07,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:07,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:07,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:55:07,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:07,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:07,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:07,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:07,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:07,466 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:07,466 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [266536651] [2022-01-31 19:55:07,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [266536651] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:07,467 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:07,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [19] imperfect sequences [] total 19 [2022-01-31 19:55:07,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293849297] [2022-01-31 19:55:07,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:07,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2022-01-31 19:55:07,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:07,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2022-01-31 19:55:07,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=301, Unknown=0, NotChecked=0, Total=342 [2022-01-31 19:55:07,467 INFO L87 Difference]: Start difference. First operand 102 states and 112 transitions. Second operand has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:08,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:08,302 INFO L93 Difference]: Finished difference Result 123 states and 134 transitions. [2022-01-31 19:55:08,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2022-01-31 19:55:08,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) Word has length 76 [2022-01-31 19:55:08,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:08,304 INFO L225 Difference]: With dead ends: 123 [2022-01-31 19:55:08,304 INFO L226 Difference]: Without dead ends: 121 [2022-01-31 19:55:08,304 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=137, Invalid=1195, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:55:08,304 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 78 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 1488 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1556 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 1488 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:08,305 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 118 Invalid, 1556 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [68 Valid, 1488 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:55:08,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2022-01-31 19:55:08,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 77. [2022-01-31 19:55:08,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 57 states have internal predecessors, (58), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:55:08,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 79 transitions. [2022-01-31 19:55:08,324 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 79 transitions. Word has length 76 [2022-01-31 19:55:08,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:08,324 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 79 transitions. [2022-01-31 19:55:08,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 2.388888888888889) internal successors, (43), 17 states have internal predecessors, (43), 7 states have call successors, (10), 3 states have call predecessors, (10), 1 states have return successors, (8), 6 states have call predecessors, (8), 6 states have call successors, (8) [2022-01-31 19:55:08,325 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 79 transitions. [2022-01-31 19:55:08,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2022-01-31 19:55:08,325 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:08,325 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:08,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-01-31 19:55:08,326 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:08,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:08,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1643572687, now seen corresponding path program 14 times [2022-01-31 19:55:08,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:08,326 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [721625412] [2022-01-31 19:55:08,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:08,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:08,327 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:08,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:08,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:08,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:08,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 26 [2022-01-31 19:55:08,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:55:08,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:55:08,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:55:08,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:55:08,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:55:08,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:08,431 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:08,431 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:08,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [721625412] [2022-01-31 19:55:08,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [721625412] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:08,431 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:08,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-01-31 19:55:08,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037180815] [2022-01-31 19:55:08,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:08,432 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-01-31 19:55:08,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-01-31 19:55:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2022-01-31 19:55:08,432 INFO L87 Difference]: Start difference. First operand 77 states and 79 transitions. Second operand has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:08,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:08,692 INFO L93 Difference]: Finished difference Result 116 states and 125 transitions. [2022-01-31 19:55:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-01-31 19:55:08,692 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 78 [2022-01-31 19:55:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:08,693 INFO L225 Difference]: With dead ends: 116 [2022-01-31 19:55:08,693 INFO L226 Difference]: Without dead ends: 80 [2022-01-31 19:55:08,693 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=154, Invalid=496, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:55:08,694 INFO L933 BasicCegarLoop]: 30 mSDtfsCounter, 77 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:08,696 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [80 Valid, 62 Invalid, 357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2022-01-31 19:55:08,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2022-01-31 19:55:08,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2022-01-31 19:55:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 59 states have internal predecessors, (60), 11 states have call successors, (11), 10 states have call predecessors, (11), 9 states have return successors, (10), 9 states have call predecessors, (10), 10 states have call successors, (10) [2022-01-31 19:55:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 81 transitions. [2022-01-31 19:55:08,716 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 81 transitions. Word has length 78 [2022-01-31 19:55:08,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:08,717 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 81 transitions. [2022-01-31 19:55:08,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.6666666666666665) internal successors, (40), 14 states have internal predecessors, (40), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:08,717 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 81 transitions. [2022-01-31 19:55:08,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2022-01-31 19:55:08,718 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:08,718 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:08,718 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-01-31 19:55:08,718 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:08,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:08,718 INFO L85 PathProgramCache]: Analyzing trace with hash 871184271, now seen corresponding path program 15 times [2022-01-31 19:55:08,718 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:08,719 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [469742837] [2022-01-31 19:55:08,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:08,719 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:08,720 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:08,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:09,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:09,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 19:55:09,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:09,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:09,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:09,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:55:09,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:09,252 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:09,252 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [469742837] [2022-01-31 19:55:09,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [469742837] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:09,253 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:09,253 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:55:09,253 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718415340] [2022-01-31 19:55:09,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:09,253 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:55:09,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:09,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:55:09,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=377, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:55:09,254 INFO L87 Difference]: Start difference. First operand 79 states and 81 transitions. Second operand has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:10,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:10,261 INFO L93 Difference]: Finished difference Result 121 states and 131 transitions. [2022-01-31 19:55:10,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2022-01-31 19:55:10,262 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 80 [2022-01-31 19:55:10,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:10,263 INFO L225 Difference]: With dead ends: 121 [2022-01-31 19:55:10,263 INFO L226 Difference]: Without dead ends: 119 [2022-01-31 19:55:10,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=203, Invalid=1777, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 19:55:10,264 INFO L933 BasicCegarLoop]: 33 mSDtfsCounter, 64 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 1061 mSolverCounterSat, 66 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 67 SdHoareTripleChecker+Valid, 108 SdHoareTripleChecker+Invalid, 1127 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 66 IncrementalHoareTripleChecker+Valid, 1061 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:10,265 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [67 Valid, 108 Invalid, 1127 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [66 Valid, 1061 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:55:10,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2022-01-31 19:55:10,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 112. [2022-01-31 19:55:10,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 83 states have (on average 1.036144578313253) internal successors, (86), 85 states have internal predecessors, (86), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 19:55:10,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 121 transitions. [2022-01-31 19:55:10,329 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 121 transitions. Word has length 80 [2022-01-31 19:55:10,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:10,329 INFO L470 AbstractCegarLoop]: Abstraction has 112 states and 121 transitions. [2022-01-31 19:55:10,329 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 20 states have (on average 2.1) internal successors, (42), 19 states have internal predecessors, (42), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:10,329 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 121 transitions. [2022-01-31 19:55:10,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2022-01-31 19:55:10,329 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:10,329 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:10,330 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-01-31 19:55:10,330 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:10,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:10,330 INFO L85 PathProgramCache]: Analyzing trace with hash -513966739, now seen corresponding path program 16 times [2022-01-31 19:55:10,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:10,330 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280803095] [2022-01-31 19:55:10,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:10,330 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:10,331 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:10,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:10,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:10,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:10,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:10,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:10,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:10,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:10,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:10,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:10,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:10,778 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:10,778 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:10,778 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280803095] [2022-01-31 19:55:10,778 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280803095] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:10,778 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:10,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:55:10,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475742782] [2022-01-31 19:55:10,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:10,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:55:10,779 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:10,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:55:10,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=417, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:55:10,779 INFO L87 Difference]: Start difference. First operand 112 states and 121 transitions. Second operand has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:11,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:11,990 INFO L93 Difference]: Finished difference Result 154 states and 171 transitions. [2022-01-31 19:55:11,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2022-01-31 19:55:11,990 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 82 [2022-01-31 19:55:11,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:11,993 INFO L225 Difference]: With dead ends: 154 [2022-01-31 19:55:11,993 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 19:55:11,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=242, Invalid=2208, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:55:11,995 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 69 mSDsluCounter, 81 mSDsCounter, 0 mSdLazyCounter, 1536 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 123 SdHoareTripleChecker+Invalid, 1617 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:11,995 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 123 Invalid, 1617 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1536 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:55:12,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 19:55:12,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 114. [2022-01-31 19:55:12,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 87 states have internal predecessors, (89), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 19:55:12,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 124 transitions. [2022-01-31 19:55:12,036 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 124 transitions. Word has length 82 [2022-01-31 19:55:12,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:12,036 INFO L470 AbstractCegarLoop]: Abstraction has 114 states and 124 transitions. [2022-01-31 19:55:12,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.0952380952380953) internal successors, (44), 20 states have internal predecessors, (44), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:12,036 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 124 transitions. [2022-01-31 19:55:12,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2022-01-31 19:55:12,037 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:12,037 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:12,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-01-31 19:55:12,037 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:12,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:12,037 INFO L85 PathProgramCache]: Analyzing trace with hash -204225589, now seen corresponding path program 17 times [2022-01-31 19:55:12,037 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:12,037 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [271005057] [2022-01-31 19:55:12,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:12,038 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:12,039 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:12,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,533 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,536 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:12,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:12,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:55:12,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,541 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:12,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:12,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:12,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:55:12,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:12,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:12,550 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:12,550 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [271005057] [2022-01-31 19:55:12,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [271005057] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:12,550 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:12,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:55:12,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407363699] [2022-01-31 19:55:12,550 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:12,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:55:12,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:12,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:55:12,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=418, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:55:12,551 INFO L87 Difference]: Start difference. First operand 114 states and 124 transitions. Second operand has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:13,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:13,999 INFO L93 Difference]: Finished difference Result 157 states and 175 transitions. [2022-01-31 19:55:13,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-01-31 19:55:13,999 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 84 [2022-01-31 19:55:14,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:14,001 INFO L225 Difference]: With dead ends: 157 [2022-01-31 19:55:14,001 INFO L226 Difference]: Without dead ends: 155 [2022-01-31 19:55:14,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 490 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=266, Invalid=2490, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:55:14,003 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 79 mSDsluCounter, 83 mSDsCounter, 0 mSdLazyCounter, 1779 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 82 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1779 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:14,003 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [82 Valid, 130 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1779 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:55:14,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2022-01-31 19:55:14,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 116. [2022-01-31 19:55:14,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 89 states have internal predecessors, (92), 18 states have call successors, (18), 11 states have call predecessors, (18), 10 states have return successors, (17), 15 states have call predecessors, (17), 17 states have call successors, (17) [2022-01-31 19:55:14,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 127 transitions. [2022-01-31 19:55:14,055 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 127 transitions. Word has length 84 [2022-01-31 19:55:14,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:14,057 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 127 transitions. [2022-01-31 19:55:14,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 20 states have internal predecessors, (46), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:14,057 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 127 transitions. [2022-01-31 19:55:14,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2022-01-31 19:55:14,058 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:14,058 INFO L514 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 6, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:14,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-01-31 19:55:14,059 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:14,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:14,059 INFO L85 PathProgramCache]: Analyzing trace with hash 1104276137, now seen corresponding path program 18 times [2022-01-31 19:55:14,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:14,059 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2048247871] [2022-01-31 19:55:14,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:14,059 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:14,060 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:14,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:14,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:14,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:14,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:55:14,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:55:14,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:55:14,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:55:14,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:55:14,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:55:14,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:14,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:14,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:14,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2048247871] [2022-01-31 19:55:14,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2048247871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:14,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:14,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:55:14,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [485397658] [2022-01-31 19:55:14,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:14,631 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:55:14,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:14,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:55:14,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:55:14,632 INFO L87 Difference]: Start difference. First operand 116 states and 127 transitions. Second operand has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:16,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:16,127 INFO L93 Difference]: Finished difference Result 137 states and 149 transitions. [2022-01-31 19:55:16,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:55:16,129 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) Word has length 86 [2022-01-31 19:55:16,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:16,130 INFO L225 Difference]: With dead ends: 137 [2022-01-31 19:55:16,130 INFO L226 Difference]: Without dead ends: 135 [2022-01-31 19:55:16,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=199, Invalid=1963, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:55:16,131 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 82 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 1944 mSolverCounterSat, 92 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 85 SdHoareTripleChecker+Valid, 134 SdHoareTripleChecker+Invalid, 2036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 92 IncrementalHoareTripleChecker+Valid, 1944 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:16,131 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [85 Valid, 134 Invalid, 2036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [92 Valid, 1944 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:55:16,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2022-01-31 19:55:16,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 87. [2022-01-31 19:55:16,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 64 states have (on average 1.03125) internal successors, (66), 65 states have internal predecessors, (66), 12 states have call successors, (12), 11 states have call predecessors, (12), 10 states have return successors, (11), 10 states have call predecessors, (11), 11 states have call successors, (11) [2022-01-31 19:55:16,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 89 transitions. [2022-01-31 19:55:16,157 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 89 transitions. Word has length 86 [2022-01-31 19:55:16,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:16,157 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 89 transitions. [2022-01-31 19:55:16,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.2857142857142856) internal successors, (48), 20 states have internal predecessors, (48), 8 states have call successors, (11), 3 states have call predecessors, (11), 1 states have return successors, (9), 7 states have call predecessors, (9), 7 states have call successors, (9) [2022-01-31 19:55:16,157 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 89 transitions. [2022-01-31 19:55:16,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2022-01-31 19:55:16,158 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:16,158 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:16,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2022-01-31 19:55:16,158 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:16,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:16,158 INFO L85 PathProgramCache]: Analyzing trace with hash -642629535, now seen corresponding path program 19 times [2022-01-31 19:55:16,158 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:16,158 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [860286310] [2022-01-31 19:55:16,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:16,159 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:16,159 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:16,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:16,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:16,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:16,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:16,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:17,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 19:55:17,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:17,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:17,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:17,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:17,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:55:17,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:55:17,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:17,041 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:17,041 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:17,041 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [860286310] [2022-01-31 19:55:17,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [860286310] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:17,041 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:17,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [] total 22 [2022-01-31 19:55:17,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659503047] [2022-01-31 19:55:17,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:17,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-01-31 19:55:17,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:17,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-01-31 19:55:17,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2022-01-31 19:55:17,043 INFO L87 Difference]: Start difference. First operand 87 states and 89 transitions. Second operand has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:18,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:18,253 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2022-01-31 19:55:18,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2022-01-31 19:55:18,253 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 88 [2022-01-31 19:55:18,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:18,254 INFO L225 Difference]: With dead ends: 133 [2022-01-31 19:55:18,254 INFO L226 Difference]: Without dead ends: 131 [2022-01-31 19:55:18,254 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 368 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=214, Invalid=1948, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 19:55:18,255 INFO L933 BasicCegarLoop]: 35 mSDtfsCounter, 69 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 1087 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 105 SdHoareTripleChecker+Invalid, 1161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1087 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:18,255 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [72 Valid, 105 Invalid, 1161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1087 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2022-01-31 19:55:18,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2022-01-31 19:55:18,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 124. [2022-01-31 19:55:18,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 92 states have (on average 1.0326086956521738) internal successors, (95), 94 states have internal predecessors, (95), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 19:55:18,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2022-01-31 19:55:18,302 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 88 [2022-01-31 19:55:18,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:18,305 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2022-01-31 19:55:18,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 21 states have (on average 2.142857142857143) internal successors, (45), 20 states have internal predecessors, (45), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:18,305 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2022-01-31 19:55:18,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2022-01-31 19:55:18,305 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:18,306 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:18,306 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-01-31 19:55:18,306 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:18,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:18,306 INFO L85 PathProgramCache]: Analyzing trace with hash 476432447, now seen corresponding path program 20 times [2022-01-31 19:55:18,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:18,306 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [397029590] [2022-01-31 19:55:18,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:18,307 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:18,307 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:18,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:18,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:18,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:18,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,834 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:18,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:18,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:18,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:18,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,841 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:18,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,843 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,844 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:55:18,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:18,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:18,848 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:18,848 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [397029590] [2022-01-31 19:55:18,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [397029590] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:18,848 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:18,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [23] imperfect sequences [] total 23 [2022-01-31 19:55:18,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695255255] [2022-01-31 19:55:18,848 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:18,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2022-01-31 19:55:18,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:18,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2022-01-31 19:55:18,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=459, Unknown=0, NotChecked=0, Total=506 [2022-01-31 19:55:18,850 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:20,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:20,234 INFO L93 Difference]: Finished difference Result 170 states and 189 transitions. [2022-01-31 19:55:20,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:55:20,234 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 90 [2022-01-31 19:55:20,234 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:20,235 INFO L225 Difference]: With dead ends: 170 [2022-01-31 19:55:20,235 INFO L226 Difference]: Without dead ends: 168 [2022-01-31 19:55:20,236 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=255, Invalid=2501, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:55:20,236 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 68 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 1471 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 71 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 1554 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 1471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:20,236 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [71 Valid, 118 Invalid, 1554 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [83 Valid, 1471 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:55:20,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2022-01-31 19:55:20,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 126. [2022-01-31 19:55:20,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 96 states have internal predecessors, (98), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 19:55:20,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 137 transitions. [2022-01-31 19:55:20,298 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 137 transitions. Word has length 90 [2022-01-31 19:55:20,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:20,299 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 137 transitions. [2022-01-31 19:55:20,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 22 states have (on average 2.1363636363636362) internal successors, (47), 21 states have internal predecessors, (47), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:20,299 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 137 transitions. [2022-01-31 19:55:20,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2022-01-31 19:55:20,299 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:20,299 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:20,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2022-01-31 19:55:20,299 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:20,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:20,300 INFO L85 PathProgramCache]: Analyzing trace with hash -2141794147, now seen corresponding path program 21 times [2022-01-31 19:55:20,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:20,300 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [564364856] [2022-01-31 19:55:20,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:20,300 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:20,301 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:20,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:21,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:21,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:21,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:55:21,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:21,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:21,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:21,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:21,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:55:21,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:55:21,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:21,034 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:21,034 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:21,034 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [564364856] [2022-01-31 19:55:21,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [564364856] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:21,034 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:21,034 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:55:21,034 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752278871] [2022-01-31 19:55:21,034 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:21,034 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:55:21,034 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:21,035 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:55:21,035 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:55:21,035 INFO L87 Difference]: Start difference. First operand 126 states and 137 transitions. Second operand has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:22,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:22,659 INFO L93 Difference]: Finished difference Result 173 states and 193 transitions. [2022-01-31 19:55:22,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:55:22,659 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 92 [2022-01-31 19:55:22,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:22,660 INFO L225 Difference]: With dead ends: 173 [2022-01-31 19:55:22,660 INFO L226 Difference]: Without dead ends: 171 [2022-01-31 19:55:22,661 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 425 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=235, Invalid=2315, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:55:22,661 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 84 mSDsluCounter, 82 mSDsCounter, 0 mSdLazyCounter, 1794 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 87 SdHoareTripleChecker+Valid, 129 SdHoareTripleChecker+Invalid, 1887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 1794 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:22,662 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [87 Valid, 129 Invalid, 1887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 1794 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:55:22,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2022-01-31 19:55:22,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2022-01-31 19:55:22,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 96 states have (on average 1.0520833333333333) internal successors, (101), 98 states have internal predecessors, (101), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 19:55:22,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 140 transitions. [2022-01-31 19:55:22,712 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 140 transitions. Word has length 92 [2022-01-31 19:55:22,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:22,712 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 140 transitions. [2022-01-31 19:55:22,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.130434782608696) internal successors, (49), 22 states have internal predecessors, (49), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:22,712 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 140 transitions. [2022-01-31 19:55:22,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2022-01-31 19:55:22,713 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:22,713 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:22,713 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-01-31 19:55:22,713 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:22,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:22,713 INFO L85 PathProgramCache]: Analyzing trace with hash -1406715525, now seen corresponding path program 22 times [2022-01-31 19:55:22,713 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:22,714 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [435805640] [2022-01-31 19:55:22,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:22,714 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:22,715 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:22,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:23,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:23,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:23,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:55:23,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:55:23,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:55:23,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:55:23,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:55:23,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:55:23,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:55:23,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:23,221 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:23,221 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:23,221 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [435805640] [2022-01-31 19:55:23,221 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [435805640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:23,221 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:23,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:55:23,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887456430] [2022-01-31 19:55:23,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:23,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:55:23,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:23,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:55:23,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=504, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:55:23,223 INFO L87 Difference]: Start difference. First operand 128 states and 140 transitions. Second operand has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:24,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:24,873 INFO L93 Difference]: Finished difference Result 176 states and 197 transitions. [2022-01-31 19:55:24,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-01-31 19:55:24,875 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 94 [2022-01-31 19:55:24,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:24,876 INFO L225 Difference]: With dead ends: 176 [2022-01-31 19:55:24,876 INFO L226 Difference]: Without dead ends: 174 [2022-01-31 19:55:24,877 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 589 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=291, Invalid=3015, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:55:24,877 INFO L933 BasicCegarLoop]: 52 mSDtfsCounter, 89 mSDsluCounter, 92 mSDsCounter, 0 mSdLazyCounter, 2252 mSolverCounterSat, 105 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2357 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 105 IncrementalHoareTripleChecker+Valid, 2252 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:24,879 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 144 Invalid, 2357 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [105 Valid, 2252 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:24,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2022-01-31 19:55:24,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 130. [2022-01-31 19:55:24,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 98 states have (on average 1.0612244897959184) internal successors, (104), 100 states have internal predecessors, (104), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 19:55:24,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 143 transitions. [2022-01-31 19:55:24,927 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 143 transitions. Word has length 94 [2022-01-31 19:55:24,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:24,927 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 143 transitions. [2022-01-31 19:55:24,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.217391304347826) internal successors, (51), 22 states have internal predecessors, (51), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:24,928 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 143 transitions. [2022-01-31 19:55:24,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 19:55:24,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:24,928 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 4, 4, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:24,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-01-31 19:55:24,928 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:24,928 INFO L85 PathProgramCache]: Analyzing trace with hash -1374529741, now seen corresponding path program 23 times [2022-01-31 19:55:24,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:24,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1235712746] [2022-01-31 19:55:24,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:24,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:24,930 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:24,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:25,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:25,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,046 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,048 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 28 [2022-01-31 19:55:25,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,049 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:25,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,051 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:25,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,053 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:25,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,055 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:55:25,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:55:25,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:55:25,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:25,060 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:25,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1235712746] [2022-01-31 19:55:25,060 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1235712746] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:25,060 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:25,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2022-01-31 19:55:25,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307597515] [2022-01-31 19:55:25,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:25,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-01-31 19:55:25,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:25,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-01-31 19:55:25,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2022-01-31 19:55:25,061 INFO L87 Difference]: Start difference. First operand 130 states and 143 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:25,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:25,421 INFO L93 Difference]: Finished difference Result 174 states and 195 transitions. [2022-01-31 19:55:25,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2022-01-31 19:55:25,421 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 96 [2022-01-31 19:55:25,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:25,422 INFO L225 Difference]: With dead ends: 174 [2022-01-31 19:55:25,422 INFO L226 Difference]: Without dead ends: 130 [2022-01-31 19:55:25,423 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=226, Invalid=766, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:55:25,423 INFO L933 BasicCegarLoop]: 34 mSDtfsCounter, 109 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 359 mSolverCounterSat, 111 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 470 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 111 IncrementalHoareTripleChecker+Valid, 359 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:25,423 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 66 Invalid, 470 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [111 Valid, 359 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:55:25,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2022-01-31 19:55:25,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 130. [2022-01-31 19:55:25,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 98 states have (on average 1.0510204081632653) internal successors, (103), 100 states have internal predecessors, (103), 20 states have call successors, (20), 12 states have call predecessors, (20), 11 states have return successors, (19), 17 states have call predecessors, (19), 19 states have call successors, (19) [2022-01-31 19:55:25,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 142 transitions. [2022-01-31 19:55:25,479 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 142 transitions. Word has length 96 [2022-01-31 19:55:25,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:25,479 INFO L470 AbstractCegarLoop]: Abstraction has 130 states and 142 transitions. [2022-01-31 19:55:25,479 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:25,479 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 142 transitions. [2022-01-31 19:55:25,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2022-01-31 19:55:25,480 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:25,480 INFO L514 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 7, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:25,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2022-01-31 19:55:25,480 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:25,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash 629203673, now seen corresponding path program 24 times [2022-01-31 19:55:25,480 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:25,480 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1401137118] [2022-01-31 19:55:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:25,480 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:25,481 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:25,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:25,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:25,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:25,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:25,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:25,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:55:25,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:55:25,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:55:25,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:25,928 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:25,928 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:25,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1401137118] [2022-01-31 19:55:25,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1401137118] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:25,928 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:25,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:55:25,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151730972] [2022-01-31 19:55:25,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:25,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:55:25,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:25,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:55:25,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=502, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:55:25,929 INFO L87 Difference]: Start difference. First operand 130 states and 142 transitions. Second operand has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:27,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:27,140 INFO L93 Difference]: Finished difference Result 151 states and 164 transitions. [2022-01-31 19:55:27,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:55:27,140 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) Word has length 96 [2022-01-31 19:55:27,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:27,141 INFO L225 Difference]: With dead ends: 151 [2022-01-31 19:55:27,141 INFO L226 Difference]: Without dead ends: 149 [2022-01-31 19:55:27,142 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=2529, Unknown=0, NotChecked=0, Total=2756 [2022-01-31 19:55:27,142 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2269 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 2376 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:27,142 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 144 Invalid, 2376 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2269 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2022-01-31 19:55:27,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2022-01-31 19:55:27,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 97. [2022-01-31 19:55:27,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 72 states have (on average 1.0277777777777777) internal successors, (74), 73 states have internal predecessors, (74), 13 states have call successors, (13), 12 states have call predecessors, (13), 11 states have return successors, (12), 11 states have call predecessors, (12), 12 states have call successors, (12) [2022-01-31 19:55:27,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 99 transitions. [2022-01-31 19:55:27,173 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 99 transitions. Word has length 96 [2022-01-31 19:55:27,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:27,173 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 99 transitions. [2022-01-31 19:55:27,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 22 states have internal predecessors, (53), 9 states have call successors, (12), 3 states have call predecessors, (12), 1 states have return successors, (10), 8 states have call predecessors, (10), 8 states have call successors, (10) [2022-01-31 19:55:27,173 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 99 transitions. [2022-01-31 19:55:27,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2022-01-31 19:55:27,175 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:27,175 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:27,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-01-31 19:55:27,175 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:27,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:27,175 INFO L85 PathProgramCache]: Analyzing trace with hash 933699857, now seen corresponding path program 25 times [2022-01-31 19:55:27,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:27,175 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [30447585] [2022-01-31 19:55:27,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:27,176 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:27,177 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:27,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:27,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:27,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:27,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:27,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:27,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:27,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:55:27,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:55:27,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:27,876 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:27,876 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:27,876 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [30447585] [2022-01-31 19:55:27,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [30447585] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:27,877 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:27,877 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:55:27,877 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1652857397] [2022-01-31 19:55:27,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:27,877 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:55:27,877 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:27,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:55:27,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:55:27,877 INFO L87 Difference]: Start difference. First operand 97 states and 99 transitions. Second operand has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:29,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:29,389 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2022-01-31 19:55:29,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2022-01-31 19:55:29,389 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 98 [2022-01-31 19:55:29,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:29,390 INFO L225 Difference]: With dead ends: 147 [2022-01-31 19:55:29,390 INFO L226 Difference]: Without dead ends: 145 [2022-01-31 19:55:29,391 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 431 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=220, Invalid=2330, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 19:55:29,392 INFO L933 BasicCegarLoop]: 37 mSDtfsCounter, 71 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 1391 mSolverCounterSat, 74 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 74 SdHoareTripleChecker+Valid, 116 SdHoareTripleChecker+Invalid, 1465 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 74 IncrementalHoareTripleChecker+Valid, 1391 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:29,392 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [74 Valid, 116 Invalid, 1465 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [74 Valid, 1391 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:55:29,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2022-01-31 19:55:29,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 138. [2022-01-31 19:55:29,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 103 states have (on average 1.029126213592233) internal successors, (106), 105 states have internal predecessors, (106), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 19:55:29,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 149 transitions. [2022-01-31 19:55:29,449 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 149 transitions. Word has length 98 [2022-01-31 19:55:29,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:29,449 INFO L470 AbstractCegarLoop]: Abstraction has 138 states and 149 transitions. [2022-01-31 19:55:29,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 23 states have (on average 2.1739130434782608) internal successors, (50), 22 states have internal predecessors, (50), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:29,449 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 149 transitions. [2022-01-31 19:55:29,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2022-01-31 19:55:29,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:29,450 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:29,450 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-01-31 19:55:29,450 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:29,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:29,450 INFO L85 PathProgramCache]: Analyzing trace with hash -1355748497, now seen corresponding path program 26 times [2022-01-31 19:55:29,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:29,450 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1481121034] [2022-01-31 19:55:29,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:29,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:29,451 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:29,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:30,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:30,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:30,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:55:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:30,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:30,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:30,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:30,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:55:30,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:55:30,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:55:30,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:30,191 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:30,191 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:30,191 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1481121034] [2022-01-31 19:55:30,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1481121034] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:30,191 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:30,192 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:55:30,192 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601829575] [2022-01-31 19:55:30,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:30,192 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:55:30,192 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:30,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:55:30,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=547, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:55:30,192 INFO L87 Difference]: Start difference. First operand 138 states and 149 transitions. Second operand has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:32,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:32,206 INFO L93 Difference]: Finished difference Result 188 states and 209 transitions. [2022-01-31 19:55:32,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:55:32,206 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 100 [2022-01-31 19:55:32,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:32,207 INFO L225 Difference]: With dead ends: 188 [2022-01-31 19:55:32,207 INFO L226 Difference]: Without dead ends: 186 [2022-01-31 19:55:32,208 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 486 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=247, Invalid=2615, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:55:32,209 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 75 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 2132 mSolverCounterSat, 89 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 78 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 89 IncrementalHoareTripleChecker+Valid, 2132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:32,209 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [78 Valid, 143 Invalid, 2221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [89 Valid, 2132 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:55:32,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2022-01-31 19:55:32,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 140. [2022-01-31 19:55:32,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 107 states have internal predecessors, (109), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 19:55:32,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 152 transitions. [2022-01-31 19:55:32,281 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 152 transitions. Word has length 100 [2022-01-31 19:55:32,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:32,282 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 152 transitions. [2022-01-31 19:55:32,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.1666666666666665) internal successors, (52), 23 states have internal predecessors, (52), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:32,282 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 152 transitions. [2022-01-31 19:55:32,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2022-01-31 19:55:32,283 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:32,283 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:32,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2022-01-31 19:55:32,283 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:32,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:32,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1802606157, now seen corresponding path program 27 times [2022-01-31 19:55:32,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:32,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [440548418] [2022-01-31 19:55:32,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:32,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:32,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:32,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:32,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:32,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:32,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:32,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:32,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:32,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:32,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:55:32,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:32,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:55:32,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:55:33,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:55:33,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:55:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:55:33,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:55:33,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:55:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:33,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:33,025 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:33,025 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [440548418] [2022-01-31 19:55:33,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [440548418] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:33,025 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:33,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:55:33,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710285571] [2022-01-31 19:55:33,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:33,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:55:33,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:33,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:55:33,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:55:33,026 INFO L87 Difference]: Start difference. First operand 140 states and 152 transitions. Second operand has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:34,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:34,945 INFO L93 Difference]: Finished difference Result 191 states and 213 transitions. [2022-01-31 19:55:34,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:55:34,945 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 102 [2022-01-31 19:55:34,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:34,946 INFO L225 Difference]: With dead ends: 191 [2022-01-31 19:55:34,946 INFO L226 Difference]: Without dead ends: 189 [2022-01-31 19:55:34,947 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=274, Invalid=3032, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:55:34,949 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 83 mSDsluCounter, 99 mSDsCounter, 0 mSdLazyCounter, 2471 mSolverCounterSat, 100 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 150 SdHoareTripleChecker+Invalid, 2571 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 100 IncrementalHoareTripleChecker+Valid, 2471 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:34,949 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 150 Invalid, 2571 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [100 Valid, 2471 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:34,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2022-01-31 19:55:35,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 142. [2022-01-31 19:55:35,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 109 states have internal predecessors, (112), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 19:55:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 155 transitions. [2022-01-31 19:55:35,024 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 155 transitions. Word has length 102 [2022-01-31 19:55:35,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:35,024 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 155 transitions. [2022-01-31 19:55:35,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.16) internal successors, (54), 24 states have internal predecessors, (54), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:35,024 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 155 transitions. [2022-01-31 19:55:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2022-01-31 19:55:35,024 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:35,025 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:35,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-01-31 19:55:35,025 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:35,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:35,025 INFO L85 PathProgramCache]: Analyzing trace with hash 439550379, now seen corresponding path program 28 times [2022-01-31 19:55:35,025 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:35,025 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2070650713] [2022-01-31 19:55:35,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:35,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:35,027 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:35,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,607 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:35,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:35,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:35,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:35,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:35,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:35,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:55:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:55:35,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:55:35,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:55:35,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:35,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:35,622 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:35,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2070650713] [2022-01-31 19:55:35,623 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2070650713] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:35,623 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:35,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:55:35,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729516196] [2022-01-31 19:55:35,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:35,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:55:35,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:35,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:55:35,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:55:35,625 INFO L87 Difference]: Start difference. First operand 142 states and 155 transitions. Second operand has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:37,483 INFO L93 Difference]: Finished difference Result 194 states and 217 transitions. [2022-01-31 19:55:37,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:55:37,483 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 104 [2022-01-31 19:55:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:37,484 INFO L225 Difference]: With dead ends: 194 [2022-01-31 19:55:37,484 INFO L226 Difference]: Without dead ends: 192 [2022-01-31 19:55:37,486 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=272, Invalid=3034, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:55:37,487 INFO L933 BasicCegarLoop]: 56 mSDtfsCounter, 98 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2731 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 157 SdHoareTripleChecker+Invalid, 2844 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 2731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:37,487 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 157 Invalid, 2844 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 2731 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:55:37,488 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2022-01-31 19:55:37,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 144. [2022-01-31 19:55:37,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 109 states have (on average 1.055045871559633) internal successors, (115), 111 states have internal predecessors, (115), 22 states have call successors, (22), 13 states have call predecessors, (22), 12 states have return successors, (21), 19 states have call predecessors, (21), 21 states have call successors, (21) [2022-01-31 19:55:37,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2022-01-31 19:55:37,565 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 104 [2022-01-31 19:55:37,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:37,565 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2022-01-31 19:55:37,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.24) internal successors, (56), 24 states have internal predecessors, (56), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:37,565 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2022-01-31 19:55:37,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 19:55:37,566 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:37,566 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:37,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-01-31 19:55:37,567 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:37,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:37,567 INFO L85 PathProgramCache]: Analyzing trace with hash -1473017885, now seen corresponding path program 29 times [2022-01-31 19:55:37,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:37,567 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1479649192] [2022-01-31 19:55:37,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:37,567 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:37,568 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:37,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:38,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:38,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:38,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:38,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:38,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:38,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:38,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:38,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:38,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:55:38,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:55:38,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:55:38,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:38,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:38,210 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:38,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1479649192] [2022-01-31 19:55:38,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1479649192] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:38,210 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:38,210 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-01-31 19:55:38,210 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623411481] [2022-01-31 19:55:38,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:38,211 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-01-31 19:55:38,211 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:38,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-01-31 19:55:38,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=549, Unknown=0, NotChecked=0, Total=600 [2022-01-31 19:55:38,211 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:39,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:39,537 INFO L93 Difference]: Finished difference Result 195 states and 219 transitions. [2022-01-31 19:55:39,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 19:55:39,537 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 106 [2022-01-31 19:55:39,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:39,538 INFO L225 Difference]: With dead ends: 195 [2022-01-31 19:55:39,538 INFO L226 Difference]: Without dead ends: 193 [2022-01-31 19:55:39,539 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=240, Invalid=2622, Unknown=0, NotChecked=0, Total=2862 [2022-01-31 19:55:39,539 INFO L933 BasicCegarLoop]: 39 mSDtfsCounter, 70 mSDsluCounter, 86 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 81 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 125 SdHoareTripleChecker+Invalid, 1713 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 81 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:39,539 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [73 Valid, 125 Invalid, 1713 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [81 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2022-01-31 19:55:39,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2022-01-31 19:55:39,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 187. [2022-01-31 19:55:39,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:55:39,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 19:55:39,640 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 106 [2022-01-31 19:55:39,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:39,640 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 19:55:39,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 23 states have internal predecessors, (53), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:39,641 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 19:55:39,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2022-01-31 19:55:39,642 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:39,642 INFO L514 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 8, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:39,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-01-31 19:55:39,642 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:39,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:39,643 INFO L85 PathProgramCache]: Analyzing trace with hash 507973001, now seen corresponding path program 30 times [2022-01-31 19:55:39,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:39,643 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1864024188] [2022-01-31 19:55:39,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:39,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:39,644 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:39,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:40,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,199 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:40,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:40,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,203 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:40,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:40,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:40,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:40,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:55:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:55:40,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:55:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:40,214 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:40,214 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1864024188] [2022-01-31 19:55:40,214 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1864024188] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:40,214 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:40,214 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:55:40,214 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1538989449] [2022-01-31 19:55:40,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:40,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:55:40,214 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:40,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:55:40,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=596, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:55:40,215 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 26 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:41,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:41,696 INFO L93 Difference]: Finished difference Result 208 states and 232 transitions. [2022-01-31 19:55:41,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:55:41,698 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) Word has length 106 [2022-01-31 19:55:41,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:41,699 INFO L225 Difference]: With dead ends: 208 [2022-01-31 19:55:41,699 INFO L226 Difference]: Without dead ends: 206 [2022-01-31 19:55:41,700 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 568 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=249, Invalid=3057, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:55:41,700 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 99 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 116 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 116 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:41,700 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 166 Invalid, 3184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [116 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:41,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2022-01-31 19:55:41,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 187. [2022-01-31 19:55:41,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:55:41,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 19:55:41,801 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 106 [2022-01-31 19:55:41,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:41,801 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 19:55:41,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.32) internal successors, (58), 24 states have internal predecessors, (58), 10 states have call successors, (13), 3 states have call predecessors, (13), 1 states have return successors, (11), 9 states have call predecessors, (11), 9 states have call successors, (11) [2022-01-31 19:55:41,802 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 19:55:41,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2022-01-31 19:55:41,802 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:41,802 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:41,802 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2022-01-31 19:55:41,803 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:41,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:41,803 INFO L85 PathProgramCache]: Analyzing trace with hash -143387583, now seen corresponding path program 31 times [2022-01-31 19:55:41,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:41,803 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1667946772] [2022-01-31 19:55:41,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:41,803 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:41,804 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:41,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:42,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:42,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:42,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:55:42,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:42,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:42,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:42,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:55:42,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:55:42,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:55:42,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,528 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:55:42,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:42,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:42,530 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:42,530 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1667946772] [2022-01-31 19:55:42,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1667946772] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:42,530 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:42,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [] total 26 [2022-01-31 19:55:42,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146473988] [2022-01-31 19:55:42,530 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:42,533 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-01-31 19:55:42,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:42,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-01-31 19:55:42,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2022-01-31 19:55:42,533 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:44,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:44,613 INFO L93 Difference]: Finished difference Result 238 states and 271 transitions. [2022-01-31 19:55:44,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:55:44,613 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 108 [2022-01-31 19:55:44,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:44,614 INFO L225 Difference]: With dead ends: 238 [2022-01-31 19:55:44,614 INFO L226 Difference]: Without dead ends: 236 [2022-01-31 19:55:44,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 582 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=262, Invalid=3044, Unknown=0, NotChecked=0, Total=3306 [2022-01-31 19:55:44,614 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 72 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 2154 mSolverCounterSat, 85 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 2239 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 85 IncrementalHoareTripleChecker+Valid, 2154 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:44,615 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [75 Valid, 142 Invalid, 2239 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [85 Valid, 2154 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:55:44,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2022-01-31 19:55:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 187. [2022-01-31 19:55:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:55:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 19:55:44,710 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 108 [2022-01-31 19:55:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:44,710 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 19:55:44,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 25 states have (on average 2.2) internal successors, (55), 24 states have internal predecessors, (55), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 19:55:44,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2022-01-31 19:55:44,711 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:44,711 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:44,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2022-01-31 19:55:44,711 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:44,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:44,711 INFO L85 PathProgramCache]: Analyzing trace with hash 2026045727, now seen corresponding path program 32 times [2022-01-31 19:55:44,711 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:44,711 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1958040331] [2022-01-31 19:55:44,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:44,712 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:44,713 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:44,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:45,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:45,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:45,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:55:45,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:55:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:55:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:55:45,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,317 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:55:45,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:55:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,320 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:55:45,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:55:45,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:55:45,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:45,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:45,325 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:45,325 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1958040331] [2022-01-31 19:55:45,325 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1958040331] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:45,325 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:45,325 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:55:45,325 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [757185089] [2022-01-31 19:55:45,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:45,326 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:55:45,326 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:45,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:55:45,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:55:45,327 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:47,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:47,435 INFO L93 Difference]: Finished difference Result 239 states and 272 transitions. [2022-01-31 19:55:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 19:55:47,441 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 110 [2022-01-31 19:55:47,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:47,442 INFO L225 Difference]: With dead ends: 239 [2022-01-31 19:55:47,442 INFO L226 Difference]: Without dead ends: 237 [2022-01-31 19:55:47,442 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=272, Invalid=3150, Unknown=0, NotChecked=0, Total=3422 [2022-01-31 19:55:47,442 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 86 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2490 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 2593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2490 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:47,443 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 149 Invalid, 2593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2490 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:55:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2022-01-31 19:55:47,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 187. [2022-01-31 19:55:47,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 141 states have (on average 1.0425531914893618) internal successors, (147), 144 states have internal predecessors, (147), 32 states have call successors, (32), 14 states have call predecessors, (32), 13 states have return successors, (31), 28 states have call predecessors, (31), 31 states have call successors, (31) [2022-01-31 19:55:47,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 210 transitions. [2022-01-31 19:55:47,547 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 210 transitions. Word has length 110 [2022-01-31 19:55:47,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:47,547 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 210 transitions. [2022-01-31 19:55:47,547 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.1923076923076925) internal successors, (57), 25 states have internal predecessors, (57), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:47,547 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 210 transitions. [2022-01-31 19:55:47,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2022-01-31 19:55:47,548 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:47,548 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:47,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2022-01-31 19:55:47,548 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:47,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:47,548 INFO L85 PathProgramCache]: Analyzing trace with hash -502649219, now seen corresponding path program 33 times [2022-01-31 19:55:47,548 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:47,548 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1444386007] [2022-01-31 19:55:47,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:47,549 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:47,550 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:47,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:48,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:48,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:48,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:55:48,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:55:48,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,258 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:55:48,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:55:48,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:55:48,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:55:48,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,274 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:55:48,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:55:48,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:55:48,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:48,281 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:48,281 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:48,281 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1444386007] [2022-01-31 19:55:48,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1444386007] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:48,281 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:48,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:55:48,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365153522] [2022-01-31 19:55:48,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:48,282 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:55:48,282 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:48,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:55:48,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:55:48,284 INFO L87 Difference]: Start difference. First operand 187 states and 210 transitions. Second operand has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:50,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:50,198 INFO L93 Difference]: Finished difference Result 234 states and 265 transitions. [2022-01-31 19:55:50,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:55:50,198 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 112 [2022-01-31 19:55:50,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:50,199 INFO L225 Difference]: With dead ends: 234 [2022-01-31 19:55:50,199 INFO L226 Difference]: Without dead ends: 232 [2022-01-31 19:55:50,200 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 754 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=308, Invalid=3852, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:55:50,200 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 93 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 2985 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 163 SdHoareTripleChecker+Invalid, 3102 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 2985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:50,201 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [96 Valid, 163 Invalid, 3102 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 2985 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:55:50,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2022-01-31 19:55:50,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 152. [2022-01-31 19:55:50,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.0521739130434782) internal successors, (121), 117 states have internal predecessors, (121), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 19:55:50,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 166 transitions. [2022-01-31 19:55:50,283 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 166 transitions. Word has length 112 [2022-01-31 19:55:50,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:50,283 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 166 transitions. [2022-01-31 19:55:50,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.185185185185185) internal successors, (59), 26 states have internal predecessors, (59), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:50,283 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 166 transitions. [2022-01-31 19:55:50,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:55:50,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:50,284 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 5, 5, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:50,284 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2022-01-31 19:55:50,284 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:50,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:50,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1323500363, now seen corresponding path program 34 times [2022-01-31 19:55:50,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:50,284 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2141988239] [2022-01-31 19:55:50,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:50,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:50,285 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:50,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:50,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:50,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,442 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:50,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 30 [2022-01-31 19:55:50,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:50,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:50,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,447 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:50,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,448 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:50,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,449 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:50,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,450 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:55:50,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:55:50,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:55:50,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:55:50,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:50,455 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:50,455 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:50,455 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2141988239] [2022-01-31 19:55:50,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2141988239] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:50,455 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:50,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [21] imperfect sequences [] total 21 [2022-01-31 19:55:50,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254664741] [2022-01-31 19:55:50,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:50,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2022-01-31 19:55:50,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:50,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2022-01-31 19:55:50,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=314, Unknown=0, NotChecked=0, Total=420 [2022-01-31 19:55:50,457 INFO L87 Difference]: Start difference. First operand 152 states and 166 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:55:50,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:50,934 INFO L93 Difference]: Finished difference Result 204 states and 228 transitions. [2022-01-31 19:55:50,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-01-31 19:55:50,934 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 114 [2022-01-31 19:55:50,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:50,935 INFO L225 Difference]: With dead ends: 204 [2022-01-31 19:55:50,935 INFO L226 Difference]: Without dead ends: 152 [2022-01-31 19:55:50,935 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=312, Invalid=1094, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:55:50,935 INFO L933 BasicCegarLoop]: 38 mSDtfsCounter, 105 mSDsluCounter, 52 mSDsCounter, 0 mSdLazyCounter, 599 mSolverCounterSat, 110 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 90 SdHoareTripleChecker+Invalid, 709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 110 IncrementalHoareTripleChecker+Valid, 599 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:50,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 90 Invalid, 709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [110 Valid, 599 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:55:50,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2022-01-31 19:55:51,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2022-01-31 19:55:51,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 115 states have (on average 1.0434782608695652) internal successors, (120), 117 states have internal predecessors, (120), 23 states have call successors, (23), 14 states have call predecessors, (23), 13 states have return successors, (22), 20 states have call predecessors, (22), 22 states have call successors, (22) [2022-01-31 19:55:51,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 165 transitions. [2022-01-31 19:55:51,012 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 165 transitions. Word has length 114 [2022-01-31 19:55:51,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:51,012 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 165 transitions. [2022-01-31 19:55:51,013 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:55:51,013 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 165 transitions. [2022-01-31 19:55:51,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2022-01-31 19:55:51,013 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:51,013 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:51,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2022-01-31 19:55:51,013 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:51,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:51,014 INFO L85 PathProgramCache]: Analyzing trace with hash 372997211, now seen corresponding path program 35 times [2022-01-31 19:55:51,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:51,014 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [988857217] [2022-01-31 19:55:51,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:51,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:51,016 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:51,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,754 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:51,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:51,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:55:51,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:55:51,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:55:51,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:55:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:55:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,788 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:55:51,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:55:51,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,799 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:55:51,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:55:51,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:51,803 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:51,803 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [988857217] [2022-01-31 19:55:51,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [988857217] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:51,803 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:51,803 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:55:51,803 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924971720] [2022-01-31 19:55:51,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:51,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:55:51,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:51,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:55:51,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:55:51,804 INFO L87 Difference]: Start difference. First operand 152 states and 165 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:54,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:54,163 INFO L93 Difference]: Finished difference Result 210 states and 234 transitions. [2022-01-31 19:55:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:55:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 114 [2022-01-31 19:55:54,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:54,164 INFO L225 Difference]: With dead ends: 210 [2022-01-31 19:55:54,164 INFO L226 Difference]: Without dead ends: 208 [2022-01-31 19:55:54,165 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 814 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=341, Invalid=4215, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:55:54,166 INFO L933 BasicCegarLoop]: 60 mSDtfsCounter, 101 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 3187 mSolverCounterSat, 127 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 166 SdHoareTripleChecker+Invalid, 3314 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 127 IncrementalHoareTripleChecker+Valid, 3187 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:54,166 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 166 Invalid, 3314 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [127 Valid, 3187 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:55:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2022-01-31 19:55:54,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 197. [2022-01-31 19:55:54,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 149 states have (on average 1.0402684563758389) internal successors, (155), 152 states have internal predecessors, (155), 33 states have call successors, (33), 15 states have call predecessors, (33), 14 states have return successors, (32), 29 states have call predecessors, (32), 32 states have call successors, (32) [2022-01-31 19:55:54,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 220 transitions. [2022-01-31 19:55:54,266 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 220 transitions. Word has length 114 [2022-01-31 19:55:54,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:54,266 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 220 transitions. [2022-01-31 19:55:54,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:54,266 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 220 transitions. [2022-01-31 19:55:54,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:55:54,267 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:54,267 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:54,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2022-01-31 19:55:54,267 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:54,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:54,267 INFO L85 PathProgramCache]: Analyzing trace with hash -1640871149, now seen corresponding path program 36 times [2022-01-31 19:55:54,267 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:54,267 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [669101328] [2022-01-31 19:55:54,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:54,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:54,269 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:54,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:55,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:55,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:55,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:55:55,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:55,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:55,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:55,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:55,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:55:55,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:55:55,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:55:55,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:55:55,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:55:55,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:55,155 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:55,155 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [669101328] [2022-01-31 19:55:55,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [669101328] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:55,155 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:55,155 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:55:55,155 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700347694] [2022-01-31 19:55:55,155 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:55,155 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:55:55,155 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:55,155 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:55:55,156 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=645, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:55:55,156 INFO L87 Difference]: Start difference. First operand 197 states and 220 transitions. Second operand has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:55:56,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:56,950 INFO L93 Difference]: Finished difference Result 252 states and 286 transitions. [2022-01-31 19:55:56,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-01-31 19:55:56,950 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 116 [2022-01-31 19:55:56,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:56,953 INFO L225 Difference]: With dead ends: 252 [2022-01-31 19:55:56,953 INFO L226 Difference]: Without dead ends: 250 [2022-01-31 19:55:56,953 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=252, Invalid=2940, Unknown=0, NotChecked=0, Total=3192 [2022-01-31 19:55:56,954 INFO L933 BasicCegarLoop]: 41 mSDtfsCounter, 83 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 1905 mSolverCounterSat, 94 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 1999 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 94 IncrementalHoareTripleChecker+Valid, 1905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:56,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 136 Invalid, 1999 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [94 Valid, 1905 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:55:56,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2022-01-31 19:55:57,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 232. [2022-01-31 19:55:57,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 175 states have (on average 1.0342857142857143) internal successors, (181), 179 states have internal predecessors, (181), 42 states have call successors, (42), 15 states have call predecessors, (42), 14 states have return successors, (41), 37 states have call predecessors, (41), 41 states have call successors, (41) [2022-01-31 19:55:57,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 264 transitions. [2022-01-31 19:55:57,082 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 264 transitions. Word has length 116 [2022-01-31 19:55:57,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:57,082 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 264 transitions. [2022-01-31 19:55:57,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 2.230769230769231) internal successors, (58), 25 states have internal predecessors, (58), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:55:57,083 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 264 transitions. [2022-01-31 19:55:57,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2022-01-31 19:55:57,083 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:57,083 INFO L514 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 9, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:57,084 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2022-01-31 19:55:57,084 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:57,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:57,084 INFO L85 PathProgramCache]: Analyzing trace with hash 55626425, now seen corresponding path program 37 times [2022-01-31 19:55:57,084 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:57,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1876366419] [2022-01-31 19:55:57,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:57,084 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:57,085 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:57,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:55:57,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:55:57,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:55:57,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:55:57,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:55:57,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:55:57,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:55:57,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:55:57,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:55:57,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:55:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:55:57,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:55:57,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:55:57,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:55:57,642 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:55:57,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1876366419] [2022-01-31 19:55:57,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1876366419] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:55:57,642 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:55:57,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:55:57,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182474157] [2022-01-31 19:55:57,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:55:57,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:55:57,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:55:57,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:55:57,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:55:57,645 INFO L87 Difference]: Start difference. First operand 232 states and 264 transitions. Second operand has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:59,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:55:59,654 INFO L93 Difference]: Finished difference Result 264 states and 300 transitions. [2022-01-31 19:55:59,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:55:59,654 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) Word has length 116 [2022-01-31 19:55:59,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:55:59,655 INFO L225 Difference]: With dead ends: 264 [2022-01-31 19:55:59,655 INFO L226 Difference]: Without dead ends: 262 [2022-01-31 19:55:59,656 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 623 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=247, Invalid=3659, Unknown=0, NotChecked=0, Total=3906 [2022-01-31 19:55:59,656 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 109 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 3428 mSolverCounterSat, 119 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3547 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 119 IncrementalHoareTripleChecker+Valid, 3428 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:55:59,656 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 171 Invalid, 3547 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [119 Valid, 3428 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:55:59,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2022-01-31 19:55:59,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 199. [2022-01-31 19:55:59,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 153 states have internal predecessors, (155), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 19:55:59,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2022-01-31 19:55:59,770 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 116 [2022-01-31 19:55:59,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:55:59,770 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2022-01-31 19:55:59,770 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.3333333333333335) internal successors, (63), 26 states have internal predecessors, (63), 11 states have call successors, (14), 3 states have call predecessors, (14), 1 states have return successors, (12), 10 states have call predecessors, (12), 10 states have call successors, (12) [2022-01-31 19:55:59,770 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2022-01-31 19:55:59,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2022-01-31 19:55:59,771 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:55:59,771 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:55:59,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2022-01-31 19:55:59,771 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:55:59,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:55:59,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1691518479, now seen corresponding path program 38 times [2022-01-31 19:55:59,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:55:59,771 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1798613926] [2022-01-31 19:55:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:55:59,771 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:55:59,776 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:55:59,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:00,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:56:00,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:56:00,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:56:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:56:00,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:56:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:56:00,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:56:00,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:56:00,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:56:00,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:56:00,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:00,516 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:00,516 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1798613926] [2022-01-31 19:56:00,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1798613926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:00,516 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:56:00,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787250349] [2022-01-31 19:56:00,517 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:00,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:56:00,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:00,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:56:00,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:56:00,517 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:03,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:03,058 INFO L93 Difference]: Finished difference Result 254 states and 288 transitions. [2022-01-31 19:56:03,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:56:03,058 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 118 [2022-01-31 19:56:03,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:03,059 INFO L225 Difference]: With dead ends: 254 [2022-01-31 19:56:03,059 INFO L226 Difference]: Without dead ends: 252 [2022-01-31 19:56:03,060 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=311, Invalid=3849, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:56:03,060 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 78 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 2536 mSolverCounterSat, 104 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 81 SdHoareTripleChecker+Valid, 151 SdHoareTripleChecker+Invalid, 2640 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 104 IncrementalHoareTripleChecker+Valid, 2536 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:03,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [81 Valid, 151 Invalid, 2640 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [104 Valid, 2536 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:56:03,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2022-01-31 19:56:03,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 199. [2022-01-31 19:56:03,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 150 states have (on average 1.0333333333333334) internal successors, (155), 153 states have internal predecessors, (155), 34 states have call successors, (34), 15 states have call predecessors, (34), 14 states have return successors, (33), 30 states have call predecessors, (33), 33 states have call successors, (33) [2022-01-31 19:56:03,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 222 transitions. [2022-01-31 19:56:03,188 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 222 transitions. Word has length 118 [2022-01-31 19:56:03,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:03,188 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 222 transitions. [2022-01-31 19:56:03,188 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.2222222222222223) internal successors, (60), 26 states have internal predecessors, (60), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:03,188 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 222 transitions. [2022-01-31 19:56:03,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2022-01-31 19:56:03,189 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:03,189 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:03,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2022-01-31 19:56:03,189 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:03,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:03,190 INFO L85 PathProgramCache]: Analyzing trace with hash 1176004943, now seen corresponding path program 39 times [2022-01-31 19:56:03,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:03,190 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1076394835] [2022-01-31 19:56:03,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:03,191 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:03,192 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:03,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,839 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:03,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:03,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,858 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:56:03,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:56:03,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:56:03,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:56:03,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:56:03,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:56:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:56:03,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:56:03,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:56:03,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:56:03,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:03,874 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:03,874 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:03,875 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1076394835] [2022-01-31 19:56:03,875 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1076394835] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:03,875 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:03,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:56:03,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407900448] [2022-01-31 19:56:03,875 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:03,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:56:03,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:03,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:56:03,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:56:03,876 INFO L87 Difference]: Start difference. First operand 199 states and 222 transitions. Second operand has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:06,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:06,322 INFO L93 Difference]: Finished difference Result 217 states and 241 transitions. [2022-01-31 19:56:06,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2022-01-31 19:56:06,323 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 120 [2022-01-31 19:56:06,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:06,323 INFO L225 Difference]: With dead ends: 217 [2022-01-31 19:56:06,323 INFO L226 Difference]: Without dead ends: 215 [2022-01-31 19:56:06,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 837 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=330, Invalid=4226, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:56:06,331 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 87 mSDsluCounter, 107 mSDsCounter, 0 mSdLazyCounter, 2966 mSolverCounterSat, 115 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 162 SdHoareTripleChecker+Invalid, 3081 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 115 IncrementalHoareTripleChecker+Valid, 2966 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:06,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 162 Invalid, 3081 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [115 Valid, 2966 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:56:06,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2022-01-31 19:56:06,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 160. [2022-01-31 19:56:06,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 123 states have internal predecessors, (126), 24 states have call successors, (24), 15 states have call predecessors, (24), 14 states have return successors, (23), 21 states have call predecessors, (23), 23 states have call successors, (23) [2022-01-31 19:56:06,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 173 transitions. [2022-01-31 19:56:06,420 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 173 transitions. Word has length 120 [2022-01-31 19:56:06,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:06,421 INFO L470 AbstractCegarLoop]: Abstraction has 160 states and 173 transitions. [2022-01-31 19:56:06,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 27 states have internal predecessors, (62), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:06,421 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 173 transitions. [2022-01-31 19:56:06,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2022-01-31 19:56:06,422 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:06,422 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:06,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2022-01-31 19:56:06,422 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:06,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:06,422 INFO L85 PathProgramCache]: Analyzing trace with hash -502990547, now seen corresponding path program 40 times [2022-01-31 19:56:06,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:06,422 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1687137588] [2022-01-31 19:56:06,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:06,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:06,424 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:06,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:07,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:07,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:07,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:56:07,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:56:07,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:56:07,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:56:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:56:07,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:56:07,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:56:07,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:56:07,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:56:07,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:56:07,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:07,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:07,167 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:07,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1687137588] [2022-01-31 19:56:07,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1687137588] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:07,168 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:07,168 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:56:07,168 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1808561768] [2022-01-31 19:56:07,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:07,168 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:56:07,168 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:07,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:56:07,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:07,169 INFO L87 Difference]: Start difference. First operand 160 states and 173 transitions. Second operand has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:09,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:09,141 INFO L93 Difference]: Finished difference Result 220 states and 245 transitions. [2022-01-31 19:56:09,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:56:09,142 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 122 [2022-01-31 19:56:09,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:09,142 INFO L225 Difference]: With dead ends: 220 [2022-01-31 19:56:09,143 INFO L226 Difference]: Without dead ends: 218 [2022-01-31 19:56:09,143 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 958 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=356, Invalid=4756, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:56:09,143 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 100 mSDsluCounter, 121 mSDsCounter, 0 mSdLazyCounter, 3656 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3786 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 3656 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:09,144 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 180 Invalid, 3786 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 3656 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:56:09,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2022-01-31 19:56:09,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 209. [2022-01-31 19:56:09,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 158 states have (on average 1.0379746835443038) internal successors, (164), 161 states have internal predecessors, (164), 35 states have call successors, (35), 16 states have call predecessors, (35), 15 states have return successors, (34), 31 states have call predecessors, (34), 34 states have call successors, (34) [2022-01-31 19:56:09,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 233 transitions. [2022-01-31 19:56:09,292 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 233 transitions. Word has length 122 [2022-01-31 19:56:09,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:09,292 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 233 transitions. [2022-01-31 19:56:09,292 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.206896551724138) internal successors, (64), 28 states have internal predecessors, (64), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:09,292 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 233 transitions. [2022-01-31 19:56:09,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:56:09,293 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:09,293 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:09,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2022-01-31 19:56:09,293 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:09,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:09,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1233285147, now seen corresponding path program 41 times [2022-01-31 19:56:09,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:09,294 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [995270633] [2022-01-31 19:56:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:09,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:09,295 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:09,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:10,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:10,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:10,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:56:10,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:56:10,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:56:10,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:56:10,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:56:10,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:56:10,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:56:10,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:56:10,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:56:10,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:56:10,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:56:10,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:10,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:10,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [995270633] [2022-01-31 19:56:10,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [995270633] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:10,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:10,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [28] imperfect sequences [] total 28 [2022-01-31 19:56:10,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329286834] [2022-01-31 19:56:10,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:10,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2022-01-31 19:56:10,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:10,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2022-01-31 19:56:10,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=699, Unknown=0, NotChecked=0, Total=756 [2022-01-31 19:56:10,172 INFO L87 Difference]: Start difference. First operand 209 states and 233 transitions. Second operand has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:12,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:12,188 INFO L93 Difference]: Finished difference Result 268 states and 304 transitions. [2022-01-31 19:56:12,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:56:12,188 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 124 [2022-01-31 19:56:12,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:12,194 INFO L225 Difference]: With dead ends: 268 [2022-01-31 19:56:12,194 INFO L226 Difference]: Without dead ends: 266 [2022-01-31 19:56:12,195 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 628 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=3389, Unknown=0, NotChecked=0, Total=3660 [2022-01-31 19:56:12,195 INFO L933 BasicCegarLoop]: 43 mSDtfsCounter, 76 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 2108 mSolverCounterSat, 93 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 2201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 93 IncrementalHoareTripleChecker+Valid, 2108 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:12,195 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 141 Invalid, 2201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [93 Valid, 2108 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2022-01-31 19:56:12,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2022-01-31 19:56:12,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 244. [2022-01-31 19:56:12,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 244 states, 184 states have (on average 1.0326086956521738) internal successors, (190), 188 states have internal predecessors, (190), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:56:12,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 244 states to 244 states and 277 transitions. [2022-01-31 19:56:12,355 INFO L78 Accepts]: Start accepts. Automaton has 244 states and 277 transitions. Word has length 124 [2022-01-31 19:56:12,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:12,356 INFO L470 AbstractCegarLoop]: Abstraction has 244 states and 277 transitions. [2022-01-31 19:56:12,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 27 states have (on average 2.259259259259259) internal successors, (61), 26 states have internal predecessors, (61), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:12,356 INFO L276 IsEmpty]: Start isEmpty. Operand 244 states and 277 transitions. [2022-01-31 19:56:12,356 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2022-01-31 19:56:12,357 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:12,357 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:12,357 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2022-01-31 19:56:12,357 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:12,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:12,357 INFO L85 PathProgramCache]: Analyzing trace with hash 890046859, now seen corresponding path program 42 times [2022-01-31 19:56:12,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:12,357 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [239972700] [2022-01-31 19:56:12,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:12,357 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:12,359 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:12,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:12,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:12,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:12,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:56:12,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:56:12,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:56:12,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:56:12,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:56:12,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:56:12,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:56:12,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:56:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:56:12,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:56:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:12,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:12,943 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:12,943 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [239972700] [2022-01-31 19:56:12,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [239972700] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:12,943 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:12,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:56:12,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893715691] [2022-01-31 19:56:12,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:12,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:56:12,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:12,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:56:12,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:12,944 INFO L87 Difference]: Start difference. First operand 244 states and 277 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:15,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:15,256 INFO L93 Difference]: Finished difference Result 319 states and 367 transitions. [2022-01-31 19:56:15,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:56:15,256 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 124 [2022-01-31 19:56:15,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:15,257 INFO L225 Difference]: With dead ends: 319 [2022-01-31 19:56:15,257 INFO L226 Difference]: Without dead ends: 317 [2022-01-31 19:56:15,258 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 940 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=366, Invalid=4890, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:56:15,258 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 110 mSDsluCounter, 115 mSDsCounter, 0 mSdLazyCounter, 3812 mSolverCounterSat, 139 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3951 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 139 IncrementalHoareTripleChecker+Valid, 3812 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:15,258 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 180 Invalid, 3951 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [139 Valid, 3812 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:56:15,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 317 states. [2022-01-31 19:56:15,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 317 to 246. [2022-01-31 19:56:15,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 190 states have internal predecessors, (193), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:56:15,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 280 transitions. [2022-01-31 19:56:15,414 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 280 transitions. Word has length 124 [2022-01-31 19:56:15,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:15,414 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 280 transitions. [2022-01-31 19:56:15,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:15,414 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 280 transitions. [2022-01-31 19:56:15,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 19:56:15,415 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:15,415 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:15,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2022-01-31 19:56:15,415 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:15,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:15,415 INFO L85 PathProgramCache]: Analyzing trace with hash 1740832963, now seen corresponding path program 43 times [2022-01-31 19:56:15,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:15,416 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1579285655] [2022-01-31 19:56:15,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:15,416 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:15,417 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:15,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:16,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:16,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:56:16,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:56:16,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:56:16,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:56:16,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:56:16,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:56:16,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:56:16,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:56:16,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:56:16,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:56:16,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:56:16,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:16,150 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:16,150 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:16,150 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1579285655] [2022-01-31 19:56:16,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1579285655] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:16,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:16,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-01-31 19:56:16,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011699078] [2022-01-31 19:56:16,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:16,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-01-31 19:56:16,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:16,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-01-31 19:56:16,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2022-01-31 19:56:16,151 INFO L87 Difference]: Start difference. First operand 246 states and 280 transitions. Second operand has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:18,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:18,257 INFO L93 Difference]: Finished difference Result 305 states and 351 transitions. [2022-01-31 19:56:18,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:56:18,258 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 126 [2022-01-31 19:56:18,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:18,259 INFO L225 Difference]: With dead ends: 305 [2022-01-31 19:56:18,259 INFO L226 Difference]: Without dead ends: 303 [2022-01-31 19:56:18,259 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 803 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=317, Invalid=4105, Unknown=0, NotChecked=0, Total=4422 [2022-01-31 19:56:18,260 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 76 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 2651 mSolverCounterSat, 103 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 79 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 2754 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 103 IncrementalHoareTripleChecker+Valid, 2651 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:18,260 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [79 Valid, 154 Invalid, 2754 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [103 Valid, 2651 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2022-01-31 19:56:18,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 303 states. [2022-01-31 19:56:18,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 303 to 246. [2022-01-31 19:56:18,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 186 states have (on average 1.0376344086021505) internal successors, (193), 190 states have internal predecessors, (193), 44 states have call successors, (44), 16 states have call predecessors, (44), 15 states have return successors, (43), 39 states have call predecessors, (43), 43 states have call successors, (43) [2022-01-31 19:56:18,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 280 transitions. [2022-01-31 19:56:18,431 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 280 transitions. Word has length 126 [2022-01-31 19:56:18,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:18,431 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 280 transitions. [2022-01-31 19:56:18,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.25) internal successors, (63), 27 states have internal predecessors, (63), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:18,431 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 280 transitions. [2022-01-31 19:56:18,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2022-01-31 19:56:18,433 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:18,433 INFO L514 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 10, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:18,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2022-01-31 19:56:18,434 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:18,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:18,435 INFO L85 PathProgramCache]: Analyzing trace with hash -430802327, now seen corresponding path program 44 times [2022-01-31 19:56:18,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:18,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1541863995] [2022-01-31 19:56:18,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:18,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:18,436 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:18,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:19,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:19,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:56:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:56:19,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:56:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:56:19,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:56:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:56:19,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:56:19,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:56:19,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:56:19,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:56:19,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:19,038 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:19,038 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:19,038 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1541863995] [2022-01-31 19:56:19,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1541863995] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:19,038 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:19,038 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:56:19,038 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861129142] [2022-01-31 19:56:19,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:19,038 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:56:19,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:19,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:56:19,039 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=810, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:19,039 INFO L87 Difference]: Start difference. First operand 246 states and 280 transitions. Second operand has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:21,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:21,270 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2022-01-31 19:56:21,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:56:21,270 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) Word has length 126 [2022-01-31 19:56:21,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:21,275 INFO L225 Difference]: With dead ends: 287 [2022-01-31 19:56:21,275 INFO L226 Difference]: Without dead ends: 285 [2022-01-31 19:56:21,276 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 733 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=267, Invalid=4289, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:56:21,276 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 119 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 4075 mSolverCounterSat, 130 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 185 SdHoareTripleChecker+Invalid, 4205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 130 IncrementalHoareTripleChecker+Valid, 4075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:21,276 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 185 Invalid, 4205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [130 Valid, 4075 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2022-01-31 19:56:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 285 states. [2022-01-31 19:56:21,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 285 to 211. [2022-01-31 19:56:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 159 states have (on average 1.0314465408805031) internal successors, (164), 162 states have internal predecessors, (164), 36 states have call successors, (36), 16 states have call predecessors, (36), 15 states have return successors, (35), 32 states have call predecessors, (35), 35 states have call successors, (35) [2022-01-31 19:56:21,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 235 transitions. [2022-01-31 19:56:21,445 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 235 transitions. Word has length 126 [2022-01-31 19:56:21,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:21,446 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 235 transitions. [2022-01-31 19:56:21,446 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.3448275862068964) internal successors, (68), 28 states have internal predecessors, (68), 12 states have call successors, (15), 3 states have call predecessors, (15), 1 states have return successors, (13), 11 states have call predecessors, (13), 11 states have call successors, (13) [2022-01-31 19:56:21,446 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 235 transitions. [2022-01-31 19:56:21,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2022-01-31 19:56:21,460 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:21,460 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:21,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2022-01-31 19:56:21,460 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:21,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:21,460 INFO L85 PathProgramCache]: Analyzing trace with hash -579882463, now seen corresponding path program 45 times [2022-01-31 19:56:21,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:21,460 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1506790942] [2022-01-31 19:56:21,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:21,461 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:21,462 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:21,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,259 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:22,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:22,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:56:22,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:56:22,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:56:22,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:56:22,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:56:22,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:56:22,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:56:22,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:56:22,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:56:22,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:56:22,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:56:22,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:22,313 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:22,314 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:22,314 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1506790942] [2022-01-31 19:56:22,314 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1506790942] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:22,314 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:22,314 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:56:22,314 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653717059] [2022-01-31 19:56:22,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:22,314 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:56:22,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:22,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:56:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=809, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:22,315 INFO L87 Difference]: Start difference. First operand 211 states and 235 transitions. Second operand has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:24,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:24,510 INFO L93 Difference]: Finished difference Result 229 states and 254 transitions. [2022-01-31 19:56:24,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:56:24,510 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 128 [2022-01-31 19:56:24,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:24,511 INFO L225 Difference]: With dead ends: 229 [2022-01-31 19:56:24,511 INFO L226 Difference]: Without dead ends: 227 [2022-01-31 19:56:24,512 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 923 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=343, Invalid=4627, Unknown=0, NotChecked=0, Total=4970 [2022-01-31 19:56:24,512 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 87 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 3218 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 90 SdHoareTripleChecker+Valid, 169 SdHoareTripleChecker+Invalid, 3335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3218 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:24,512 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [90 Valid, 169 Invalid, 3335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3218 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:56:24,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2022-01-31 19:56:24,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 168. [2022-01-31 19:56:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 127 states have (on average 1.0393700787401574) internal successors, (132), 129 states have internal predecessors, (132), 25 states have call successors, (25), 16 states have call predecessors, (25), 15 states have return successors, (24), 22 states have call predecessors, (24), 24 states have call successors, (24) [2022-01-31 19:56:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 181 transitions. [2022-01-31 19:56:24,622 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 181 transitions. Word has length 128 [2022-01-31 19:56:24,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:24,623 INFO L470 AbstractCegarLoop]: Abstraction has 168 states and 181 transitions. [2022-01-31 19:56:24,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2413793103448274) internal successors, (65), 28 states have internal predecessors, (65), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:24,623 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 181 transitions. [2022-01-31 19:56:24,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2022-01-31 19:56:24,623 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:24,624 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:24,624 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2022-01-31 19:56:24,624 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:24,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:24,625 INFO L85 PathProgramCache]: Analyzing trace with hash -1699380225, now seen corresponding path program 46 times [2022-01-31 19:56:24,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:24,625 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2096525685] [2022-01-31 19:56:24,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:24,625 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:24,626 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:24,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:25,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:25,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:25,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:56:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:56:25,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:56:25,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:56:25,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:56:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:56:25,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:56:25,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:56:25,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:56:25,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:56:25,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:56:25,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:25,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:25,485 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:25,485 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2096525685] [2022-01-31 19:56:25,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2096525685] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:25,485 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:25,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:56:25,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311687083] [2022-01-31 19:56:25,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:25,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:56:25,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:25,486 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:56:25,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:56:25,486 INFO L87 Difference]: Start difference. First operand 168 states and 181 transitions. Second operand has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:28,493 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:28,493 INFO L93 Difference]: Finished difference Result 232 states and 258 transitions. [2022-01-31 19:56:28,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:56:28,494 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 130 [2022-01-31 19:56:28,494 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:28,495 INFO L225 Difference]: With dead ends: 232 [2022-01-31 19:56:28,495 INFO L226 Difference]: Without dead ends: 230 [2022-01-31 19:56:28,495 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1006 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=362, Invalid=5040, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:56:28,496 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 97 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 3668 mSolverCounterSat, 128 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 3796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 128 IncrementalHoareTripleChecker+Valid, 3668 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:28,496 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 179 Invalid, 3796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [128 Valid, 3668 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:56:28,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2022-01-31 19:56:28,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 221. [2022-01-31 19:56:28,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 167 states have (on average 1.035928143712575) internal successors, (173), 170 states have internal predecessors, (173), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:56:28,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 246 transitions. [2022-01-31 19:56:28,647 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 246 transitions. Word has length 130 [2022-01-31 19:56:28,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:28,648 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 246 transitions. [2022-01-31 19:56:28,648 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2333333333333334) internal successors, (67), 29 states have internal predecessors, (67), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:28,648 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 246 transitions. [2022-01-31 19:56:28,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:56:28,671 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:28,671 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 6, 6, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:28,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2022-01-31 19:56:28,672 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:28,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:28,672 INFO L85 PathProgramCache]: Analyzing trace with hash 560456375, now seen corresponding path program 47 times [2022-01-31 19:56:28,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:28,672 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1193666415] [2022-01-31 19:56:28,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:28,673 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:28,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:28,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:28,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:28,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 32 [2022-01-31 19:56:28,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:56:28,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:56:28,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:56:28,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:56:28,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:56:28,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:56:28,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:56:28,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:56:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:56:28,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:56:28,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:56:28,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:28,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:28,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:28,924 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1193666415] [2022-01-31 19:56:28,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1193666415] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:28,924 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:28,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-01-31 19:56:28,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167439106] [2022-01-31 19:56:28,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:28,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-01-31 19:56:28,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:28,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-01-31 19:56:28,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=412, Unknown=0, NotChecked=0, Total=552 [2022-01-31 19:56:28,925 INFO L87 Difference]: Start difference. First operand 221 states and 246 transitions. Second operand has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:29,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:29,406 INFO L93 Difference]: Finished difference Result 281 states and 318 transitions. [2022-01-31 19:56:29,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2022-01-31 19:56:29,407 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 132 [2022-01-31 19:56:29,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:29,407 INFO L225 Difference]: With dead ends: 281 [2022-01-31 19:56:29,408 INFO L226 Difference]: Without dead ends: 221 [2022-01-31 19:56:29,408 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=412, Invalid=1480, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 19:56:29,408 INFO L933 BasicCegarLoop]: 42 mSDtfsCounter, 153 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 451 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 74 SdHoareTripleChecker+Invalid, 614 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 451 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:29,408 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 74 Invalid, 614 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 451 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2022-01-31 19:56:29,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2022-01-31 19:56:29,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 221. [2022-01-31 19:56:29,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 167 states have (on average 1.029940119760479) internal successors, (172), 170 states have internal predecessors, (172), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:56:29,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 245 transitions. [2022-01-31 19:56:29,554 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 245 transitions. Word has length 132 [2022-01-31 19:56:29,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:29,554 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 245 transitions. [2022-01-31 19:56:29,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.6666666666666665) internal successors, (64), 23 states have internal predecessors, (64), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:29,555 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 245 transitions. [2022-01-31 19:56:29,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2022-01-31 19:56:29,555 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:29,555 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:29,555 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2022-01-31 19:56:29,555 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:29,556 INFO L85 PathProgramCache]: Analyzing trace with hash 500061789, now seen corresponding path program 48 times [2022-01-31 19:56:29,556 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:29,556 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119266747] [2022-01-31 19:56:29,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:29,556 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:29,557 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:29,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:30,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:30,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:30,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:56:30,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:56:30,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:56:30,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:56:30,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,248 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:56:30,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:56:30,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:56:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:56:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:56:30,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:56:30,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:56:30,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:30,257 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:30,257 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:30,257 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119266747] [2022-01-31 19:56:30,258 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [119266747] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:30,258 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:30,258 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:56:30,258 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505228901] [2022-01-31 19:56:30,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:30,258 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:56:30,258 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:30,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:56:30,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:56:30,259 INFO L87 Difference]: Start difference. First operand 221 states and 245 transitions. Second operand has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:33,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:33,370 INFO L93 Difference]: Finished difference Result 286 states and 323 transitions. [2022-01-31 19:56:33,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:56:33,370 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 132 [2022-01-31 19:56:33,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:33,371 INFO L225 Difference]: With dead ends: 286 [2022-01-31 19:56:33,371 INFO L226 Difference]: Without dead ends: 284 [2022-01-31 19:56:33,372 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=381, Invalid=5471, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:56:33,372 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 106 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 4146 mSolverCounterSat, 142 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 4288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 142 IncrementalHoareTripleChecker+Valid, 4146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:33,372 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 189 Invalid, 4288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [142 Valid, 4146 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:56:33,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2022-01-31 19:56:33,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 223. [2022-01-31 19:56:33,524 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 169 states have (on average 1.0355029585798816) internal successors, (175), 172 states have internal predecessors, (175), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:56:33,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 248 transitions. [2022-01-31 19:56:33,524 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 248 transitions. Word has length 132 [2022-01-31 19:56:33,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:33,524 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 248 transitions. [2022-01-31 19:56:33,524 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.225806451612903) internal successors, (69), 30 states have internal predecessors, (69), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:33,525 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 248 transitions. [2022-01-31 19:56:33,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:56:33,525 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:33,525 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:33,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2022-01-31 19:56:33,525 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:33,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:33,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1100322197, now seen corresponding path program 49 times [2022-01-31 19:56:33,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:33,526 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [351052801] [2022-01-31 19:56:33,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:33,526 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:33,527 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:33,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:34,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:34,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:56:34,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:56:34,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:56:34,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:56:34,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:56:34,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:56:34,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:56:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:56:34,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:56:34,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:56:34,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:56:34,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:56:34,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:34,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:34,632 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:34,632 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [351052801] [2022-01-31 19:56:34,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [351052801] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:34,632 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:34,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:56:34,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288630623] [2022-01-31 19:56:34,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:34,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:56:34,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:34,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:56:34,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=747, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:56:34,633 INFO L87 Difference]: Start difference. First operand 223 states and 248 transitions. Second operand has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:36,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:36,421 INFO L93 Difference]: Finished difference Result 290 states and 329 transitions. [2022-01-31 19:56:36,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:56:36,426 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 134 [2022-01-31 19:56:36,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:36,435 INFO L225 Difference]: With dead ends: 290 [2022-01-31 19:56:36,435 INFO L226 Difference]: Without dead ends: 288 [2022-01-31 19:56:36,436 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1095 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=469, Invalid=3691, Unknown=0, NotChecked=0, Total=4160 [2022-01-31 19:56:36,436 INFO L933 BasicCegarLoop]: 45 mSDtfsCounter, 184 mSDsluCounter, 67 mSDsCounter, 0 mSdLazyCounter, 1655 mSolverCounterSat, 202 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 112 SdHoareTripleChecker+Invalid, 1857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 202 IncrementalHoareTripleChecker+Valid, 1655 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:36,436 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 112 Invalid, 1857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [202 Valid, 1655 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2022-01-31 19:56:36,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2022-01-31 19:56:36,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 258. [2022-01-31 19:56:36,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 258 states, 195 states have (on average 1.0307692307692307) internal successors, (201), 199 states have internal predecessors, (201), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 19:56:36,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 258 states to 258 states and 292 transitions. [2022-01-31 19:56:36,657 INFO L78 Accepts]: Start accepts. Automaton has 258 states and 292 transitions. Word has length 134 [2022-01-31 19:56:36,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:36,657 INFO L470 AbstractCegarLoop]: Abstraction has 258 states and 292 transitions. [2022-01-31 19:56:36,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 29 states have (on average 2.2758620689655173) internal successors, (66), 28 states have internal predecessors, (66), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:36,657 INFO L276 IsEmpty]: Start isEmpty. Operand 258 states and 292 transitions. [2022-01-31 19:56:36,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2022-01-31 19:56:36,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:36,658 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:36,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2022-01-31 19:56:36,658 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:36,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:36,660 INFO L85 PathProgramCache]: Analyzing trace with hash 1039927611, now seen corresponding path program 50 times [2022-01-31 19:56:36,660 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:36,660 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1774894207] [2022-01-31 19:56:36,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:36,661 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:36,670 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:36,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:37,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:37,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:37,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:56:37,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:56:37,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:56:37,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:56:37,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:56:37,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:56:37,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,519 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:56:37,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:56:37,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:56:37,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,527 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:56:37,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:56:37,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:37,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:37,547 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:37,547 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1774894207] [2022-01-31 19:56:37,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1774894207] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:37,547 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:37,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:56:37,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83152836] [2022-01-31 19:56:37,547 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:37,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:56:37,547 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:37,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:56:37,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=928, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:56:37,548 INFO L87 Difference]: Start difference. First operand 258 states and 292 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:40,832 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:40,833 INFO L93 Difference]: Finished difference Result 345 states and 397 transitions. [2022-01-31 19:56:40,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:56:40,834 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 134 [2022-01-31 19:56:40,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:40,835 INFO L225 Difference]: With dead ends: 345 [2022-01-31 19:56:40,835 INFO L226 Difference]: Without dead ends: 343 [2022-01-31 19:56:40,836 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1075 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=391, Invalid=5615, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:56:40,836 INFO L933 BasicCegarLoop]: 69 mSDtfsCounter, 116 mSDsluCounter, 124 mSDsCounter, 0 mSdLazyCounter, 4440 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 193 SdHoareTripleChecker+Invalid, 4590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4440 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:40,836 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 193 Invalid, 4590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4440 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:56:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 343 states. [2022-01-31 19:56:41,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 343 to 260. [2022-01-31 19:56:41,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 197 states have (on average 1.0355329949238579) internal successors, (204), 201 states have internal predecessors, (204), 46 states have call successors, (46), 17 states have call predecessors, (46), 16 states have return successors, (45), 41 states have call predecessors, (45), 45 states have call successors, (45) [2022-01-31 19:56:41,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 295 transitions. [2022-01-31 19:56:41,025 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 295 transitions. Word has length 134 [2022-01-31 19:56:41,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:41,025 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 295 transitions. [2022-01-31 19:56:41,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:41,025 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 295 transitions. [2022-01-31 19:56:41,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 19:56:41,026 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:41,026 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:41,026 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2022-01-31 19:56:41,026 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:41,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:41,026 INFO L85 PathProgramCache]: Analyzing trace with hash 220334323, now seen corresponding path program 51 times [2022-01-31 19:56:41,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:41,026 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114072744] [2022-01-31 19:56:41,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:41,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:41,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:41,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:42,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:42,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:56:42,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:56:42,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:56:42,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:56:42,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,056 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:56:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,058 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:56:42,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:56:42,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,061 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:56:42,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,062 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:56:42,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,064 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:56:42,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:56:42,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:56:42,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:42,069 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:42,069 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114072744] [2022-01-31 19:56:42,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114072744] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:42,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:42,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:56:42,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182593043] [2022-01-31 19:56:42,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:42,070 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:56:42,070 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:42,070 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:56:42,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=794, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:56:42,070 INFO L87 Difference]: Start difference. First operand 260 states and 295 transitions. Second operand has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:44,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:44,385 INFO L93 Difference]: Finished difference Result 292 states and 332 transitions. [2022-01-31 19:56:44,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2022-01-31 19:56:44,386 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 136 [2022-01-31 19:56:44,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:44,387 INFO L225 Difference]: With dead ends: 292 [2022-01-31 19:56:44,387 INFO L226 Difference]: Without dead ends: 290 [2022-01-31 19:56:44,387 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=545, Invalid=4147, Unknown=0, NotChecked=0, Total=4692 [2022-01-31 19:56:44,387 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 195 mSDsluCounter, 89 mSDsCounter, 0 mSdLazyCounter, 2452 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 143 SdHoareTripleChecker+Invalid, 2676 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 2452 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:44,387 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [198 Valid, 143 Invalid, 2676 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 2452 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:56:44,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2022-01-31 19:56:44,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 225. [2022-01-31 19:56:44,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 171 states have (on average 1.04093567251462) internal successors, (178), 174 states have internal predecessors, (178), 37 states have call successors, (37), 17 states have call predecessors, (37), 16 states have return successors, (36), 33 states have call predecessors, (36), 36 states have call successors, (36) [2022-01-31 19:56:44,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 251 transitions. [2022-01-31 19:56:44,544 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 251 transitions. Word has length 136 [2022-01-31 19:56:44,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:44,544 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 251 transitions. [2022-01-31 19:56:44,545 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.2666666666666666) internal successors, (68), 29 states have internal predecessors, (68), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:44,545 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 251 transitions. [2022-01-31 19:56:44,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2022-01-31 19:56:44,545 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:44,546 INFO L514 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 11, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:44,546 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2022-01-31 19:56:44,546 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:44,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:44,546 INFO L85 PathProgramCache]: Analyzing trace with hash 159939737, now seen corresponding path program 52 times [2022-01-31 19:56:44,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:44,546 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1739924871] [2022-01-31 19:56:44,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:44,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:44,548 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:44,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:45,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:45,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:45,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:56:45,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:56:45,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:56:45,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:56:45,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:56:45,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:56:45,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:56:45,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:56:45,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:56:45,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:56:45,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:56:45,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:45,102 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:45,102 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:45,102 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1739924871] [2022-01-31 19:56:45,102 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1739924871] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:45,102 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:45,102 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:56:45,102 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331972435] [2022-01-31 19:56:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:45,103 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:56:45,103 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:45,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:56:45,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=928, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:56:45,109 INFO L87 Difference]: Start difference. First operand 225 states and 251 transitions. Second operand has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:48,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:48,104 INFO L93 Difference]: Finished difference Result 263 states and 294 transitions. [2022-01-31 19:56:48,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:56:48,104 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) Word has length 136 [2022-01-31 19:56:48,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:48,105 INFO L225 Difference]: With dead ends: 263 [2022-01-31 19:56:48,105 INFO L226 Difference]: Without dead ends: 261 [2022-01-31 19:56:48,106 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=287, Invalid=4969, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:56:48,106 INFO L933 BasicCegarLoop]: 73 mSDtfsCounter, 126 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 4896 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 129 SdHoareTripleChecker+Valid, 202 SdHoareTripleChecker+Invalid, 5036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4896 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:48,106 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [129 Valid, 202 Invalid, 5036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4896 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:56:48,107 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2022-01-31 19:56:48,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 176. [2022-01-31 19:56:48,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 133 states have (on average 1.0300751879699248) internal successors, (137), 135 states have internal predecessors, (137), 26 states have call successors, (26), 17 states have call predecessors, (26), 16 states have return successors, (25), 23 states have call predecessors, (25), 25 states have call successors, (25) [2022-01-31 19:56:48,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 188 transitions. [2022-01-31 19:56:48,233 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 188 transitions. Word has length 136 [2022-01-31 19:56:48,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:48,234 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 188 transitions. [2022-01-31 19:56:48,234 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.3548387096774195) internal successors, (73), 30 states have internal predecessors, (73), 13 states have call successors, (16), 3 states have call predecessors, (16), 1 states have return successors, (14), 12 states have call predecessors, (14), 12 states have call successors, (14) [2022-01-31 19:56:48,234 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 188 transitions. [2022-01-31 19:56:48,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2022-01-31 19:56:48,234 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:48,234 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:48,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2022-01-31 19:56:48,235 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:48,235 INFO L85 PathProgramCache]: Analyzing trace with hash 660544721, now seen corresponding path program 53 times [2022-01-31 19:56:48,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:48,235 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [590717186] [2022-01-31 19:56:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:48,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:48,237 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:48,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,539 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:49,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,542 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:49,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,543 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:49,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:56:49,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,545 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:56:49,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:56:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,548 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:56:49,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:56:49,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:56:49,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,553 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:56:49,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:56:49,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:56:49,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:56:49,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:56:49,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,563 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:56:49,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:49,565 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:49,565 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:49,565 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [590717186] [2022-01-31 19:56:49,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [590717186] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:49,565 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:49,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:56:49,566 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046853861] [2022-01-31 19:56:49,566 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:49,566 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:56:49,566 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:49,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:56:49,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:56:49,566 INFO L87 Difference]: Start difference. First operand 176 states and 188 transitions. Second operand has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:51,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:51,732 INFO L93 Difference]: Finished difference Result 246 states and 273 transitions. [2022-01-31 19:56:51,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:56:51,733 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 138 [2022-01-31 19:56:51,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:51,734 INFO L225 Difference]: With dead ends: 246 [2022-01-31 19:56:51,734 INFO L226 Difference]: Without dead ends: 244 [2022-01-31 19:56:51,734 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1365 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=553, Invalid=4559, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:56:51,735 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 170 mSDsluCounter, 79 mSDsCounter, 0 mSdLazyCounter, 2436 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 2637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2436 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:51,735 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 137 Invalid, 2637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2436 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:56:51,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2022-01-31 19:56:51,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 233. [2022-01-31 19:56:51,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 176 states have (on average 1.0284090909090908) internal successors, (181), 179 states have internal predecessors, (181), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:56:51,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 258 transitions. [2022-01-31 19:56:51,937 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 258 transitions. Word has length 138 [2022-01-31 19:56:51,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:51,937 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 258 transitions. [2022-01-31 19:56:51,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2580645161290325) internal successors, (70), 30 states have internal predecessors, (70), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:51,937 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 258 transitions. [2022-01-31 19:56:51,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2022-01-31 19:56:51,948 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:51,948 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:51,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2022-01-31 19:56:51,948 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:51,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash -1499025105, now seen corresponding path program 54 times [2022-01-31 19:56:51,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:51,949 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1453391702] [2022-01-31 19:56:51,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:51,949 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:51,951 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:51,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:52,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:52,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:56:52,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:56:52,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:56:52,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,957 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:56:52,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:56:52,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:56:52,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:56:52,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:56:52,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:56:52,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:56:52,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:56:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:56:52,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:52,977 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:52,977 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1453391702] [2022-01-31 19:56:52,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1453391702] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:52,977 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:52,977 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:56:52,977 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381077333] [2022-01-31 19:56:52,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:52,991 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:56:52,991 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:52,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:56:52,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=921, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:56:52,992 INFO L87 Difference]: Start difference. First operand 233 states and 258 transitions. Second operand has 33 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:55,405 INFO L93 Difference]: Finished difference Result 304 states and 344 transitions. [2022-01-31 19:56:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:56:55,405 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 140 [2022-01-31 19:56:55,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:55,413 INFO L225 Difference]: With dead ends: 304 [2022-01-31 19:56:55,414 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 19:56:55,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1563 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=561, Invalid=5139, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:56:55,421 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 170 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 2802 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 3003 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 2802 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:55,422 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 147 Invalid, 3003 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 2802 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:56:55,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 19:56:55,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 235. [2022-01-31 19:56:55,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 178 states have (on average 1.0337078651685394) internal successors, (184), 181 states have internal predecessors, (184), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:56:55,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 261 transitions. [2022-01-31 19:56:55,591 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 261 transitions. Word has length 140 [2022-01-31 19:56:55,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:55,591 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 261 transitions. [2022-01-31 19:56:55,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.25) internal successors, (72), 31 states have internal predecessors, (72), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:56:55,591 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 261 transitions. [2022-01-31 19:56:55,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:56:55,592 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:55,592 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:55,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2022-01-31 19:56:55,592 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:55,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:55,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1505179751, now seen corresponding path program 55 times [2022-01-31 19:56:55,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:55,592 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2027352974] [2022-01-31 19:56:55,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:55,593 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:55,594 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:56:56,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:56:56,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:56:56,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:56:56,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:56:56,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:56:56,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:56:56,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:56:56,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:56:56,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:56:56,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:56:56,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:56:56,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:56:56,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:56:56,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:56:56,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:56:56,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:56:56,509 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:56:56,509 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:56:56,509 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2027352974] [2022-01-31 19:56:56,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2027352974] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:56:56,509 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:56:56,509 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [31] imperfect sequences [] total 31 [2022-01-31 19:56:56,509 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797266181] [2022-01-31 19:56:56,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:56:56,509 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2022-01-31 19:56:56,510 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:56:56,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2022-01-31 19:56:56,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=867, Unknown=0, NotChecked=0, Total=930 [2022-01-31 19:56:56,510 INFO L87 Difference]: Start difference. First operand 235 states and 261 transitions. Second operand has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:56:58,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:56:58,937 INFO L93 Difference]: Finished difference Result 302 states and 342 transitions. [2022-01-31 19:56:58,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2022-01-31 19:56:58,956 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 142 [2022-01-31 19:56:58,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:56:58,980 INFO L225 Difference]: With dead ends: 302 [2022-01-31 19:56:58,980 INFO L226 Difference]: Without dead ends: 300 [2022-01-31 19:56:58,980 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 780 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=4254, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:56:58,981 INFO L933 BasicCegarLoop]: 47 mSDtfsCounter, 83 mSDsluCounter, 114 mSDsCounter, 0 mSdLazyCounter, 2806 mSolverCounterSat, 107 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 161 SdHoareTripleChecker+Invalid, 2913 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 107 IncrementalHoareTripleChecker+Valid, 2806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:56:58,981 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [86 Valid, 161 Invalid, 2913 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [107 Valid, 2806 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2022-01-31 19:56:58,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2022-01-31 19:56:59,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 270. [2022-01-31 19:56:59,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 204 states have (on average 1.0294117647058822) internal successors, (210), 208 states have internal predecessors, (210), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 19:56:59,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 305 transitions. [2022-01-31 19:56:59,194 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 305 transitions. Word has length 142 [2022-01-31 19:56:59,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:56:59,194 INFO L470 AbstractCegarLoop]: Abstraction has 270 states and 305 transitions. [2022-01-31 19:56:59,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 30 states have (on average 2.3) internal successors, (69), 29 states have internal predecessors, (69), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:56:59,195 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 305 transitions. [2022-01-31 19:56:59,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2022-01-31 19:56:59,195 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:56:59,195 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:56:59,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2022-01-31 19:56:59,196 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:56:59,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:56:59,196 INFO L85 PathProgramCache]: Analyzing trace with hash 1918543373, now seen corresponding path program 56 times [2022-01-31 19:56:59,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:56:59,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [630440156] [2022-01-31 19:56:59,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:56:59,196 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:56:59,198 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:56:59,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,073 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:00,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,074 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:00,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:00,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,076 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:57:00,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:57:00,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:57:00,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,084 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:57:00,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,086 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:57:00,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:57:00,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:57:00,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:57:00,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:57:00,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:57:00,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:57:00,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:57:00,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:00,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:00,100 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:00,100 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [630440156] [2022-01-31 19:57:00,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [630440156] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:00,100 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:00,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:00,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113444610] [2022-01-31 19:57:00,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:00,101 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:00,101 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:00,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:00,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:00,101 INFO L87 Difference]: Start difference. First operand 270 states and 305 transitions. Second operand has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:02,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:02,664 INFO L93 Difference]: Finished difference Result 357 states and 410 transitions. [2022-01-31 19:57:02,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:57:02,664 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 142 [2022-01-31 19:57:02,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:02,666 INFO L225 Difference]: With dead ends: 357 [2022-01-31 19:57:02,666 INFO L226 Difference]: Without dead ends: 355 [2022-01-31 19:57:02,666 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1711 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=517, Invalid=5645, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:57:02,668 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 138 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 3122 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 155 SdHoareTripleChecker+Invalid, 3287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 3122 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:02,668 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 155 Invalid, 3287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 3122 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:57:02,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 355 states. [2022-01-31 19:57:03,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 355 to 272. [2022-01-31 19:57:03,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 206 states have (on average 1.0339805825242718) internal successors, (213), 210 states have internal predecessors, (213), 48 states have call successors, (48), 18 states have call predecessors, (48), 17 states have return successors, (47), 43 states have call predecessors, (47), 47 states have call successors, (47) [2022-01-31 19:57:03,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 308 transitions. [2022-01-31 19:57:03,085 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 308 transitions. Word has length 142 [2022-01-31 19:57:03,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:03,086 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 308 transitions. [2022-01-31 19:57:03,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.242424242424242) internal successors, (74), 32 states have internal predecessors, (74), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:03,086 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 308 transitions. [2022-01-31 19:57:03,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:57:03,086 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:03,086 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:03,087 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2022-01-31 19:57:03,087 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:03,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:03,087 INFO L85 PathProgramCache]: Analyzing trace with hash 138505669, now seen corresponding path program 57 times [2022-01-31 19:57:03,087 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:03,087 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [680646438] [2022-01-31 19:57:03,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:03,087 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:03,089 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:03,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:04,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:04,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:04,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:57:04,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:57:04,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:57:04,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:57:04,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:57:04,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:57:04,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:57:04,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:57:04,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:57:04,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:57:04,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:57:04,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:57:04,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:57:04,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:04,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:04,120 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:04,120 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [680646438] [2022-01-31 19:57:04,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [680646438] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:04,120 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:04,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [32] imperfect sequences [] total 32 [2022-01-31 19:57:04,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117418625] [2022-01-31 19:57:04,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:04,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2022-01-31 19:57:04,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:04,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2022-01-31 19:57:04,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=927, Unknown=0, NotChecked=0, Total=992 [2022-01-31 19:57:04,121 INFO L87 Difference]: Start difference. First operand 272 states and 308 transitions. Second operand has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:07,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:07,030 INFO L93 Difference]: Finished difference Result 304 states and 345 transitions. [2022-01-31 19:57:07,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:57:07,030 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 144 [2022-01-31 19:57:07,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:07,031 INFO L225 Difference]: With dead ends: 304 [2022-01-31 19:57:07,031 INFO L226 Difference]: Without dead ends: 302 [2022-01-31 19:57:07,032 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 975 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=348, Invalid=5054, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 19:57:07,038 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 80 mSDsluCounter, 116 mSDsCounter, 0 mSdLazyCounter, 3355 mSolverCounterSat, 113 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 170 SdHoareTripleChecker+Invalid, 3468 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 113 IncrementalHoareTripleChecker+Valid, 3355 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:07,038 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [83 Valid, 170 Invalid, 3468 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [113 Valid, 3355 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:57:07,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 302 states. [2022-01-31 19:57:07,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 302 to 237. [2022-01-31 19:57:07,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 180 states have (on average 1.038888888888889) internal successors, (187), 183 states have internal predecessors, (187), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:57:07,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 264 transitions. [2022-01-31 19:57:07,237 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 264 transitions. Word has length 144 [2022-01-31 19:57:07,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:07,237 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 264 transitions. [2022-01-31 19:57:07,238 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 30 states have internal predecessors, (71), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:07,238 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 264 transitions. [2022-01-31 19:57:07,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2022-01-31 19:57:07,240 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:07,240 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:07,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2022-01-31 19:57:07,240 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:07,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:07,240 INFO L85 PathProgramCache]: Analyzing trace with hash 551869291, now seen corresponding path program 58 times [2022-01-31 19:57:07,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:07,240 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [619288604] [2022-01-31 19:57:07,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:07,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:07,242 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:08,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:08,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:57:08,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:57:08,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:57:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:57:08,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:57:08,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:57:08,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:57:08,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:57:08,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:57:08,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:57:08,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:57:08,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:57:08,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:08,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:08,480 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:08,480 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [619288604] [2022-01-31 19:57:08,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [619288604] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:08,481 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:08,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:08,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338906519] [2022-01-31 19:57:08,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:08,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:08,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:08,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:08,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1016, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:08,482 INFO L87 Difference]: Start difference. First operand 237 states and 264 transitions. Second operand has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:11,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:11,135 INFO L93 Difference]: Finished difference Result 324 states and 369 transitions. [2022-01-31 19:57:11,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:57:11,136 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 144 [2022-01-31 19:57:11,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:11,138 INFO L225 Difference]: With dead ends: 324 [2022-01-31 19:57:11,138 INFO L226 Difference]: Without dead ends: 322 [2022-01-31 19:57:11,138 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1549 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=405, Invalid=5295, Unknown=0, NotChecked=0, Total=5700 [2022-01-31 19:57:11,138 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 122 mSDsluCounter, 93 mSDsCounter, 0 mSdLazyCounter, 3442 mSolverCounterSat, 141 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 3583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 141 IncrementalHoareTripleChecker+Valid, 3442 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:11,138 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 167 Invalid, 3583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [141 Valid, 3442 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:57:11,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2022-01-31 19:57:11,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 239. [2022-01-31 19:57:11,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 182 states have (on average 1.043956043956044) internal successors, (190), 185 states have internal predecessors, (190), 39 states have call successors, (39), 18 states have call predecessors, (39), 17 states have return successors, (38), 35 states have call predecessors, (38), 38 states have call successors, (38) [2022-01-31 19:57:11,347 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 267 transitions. [2022-01-31 19:57:11,347 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 267 transitions. Word has length 144 [2022-01-31 19:57:11,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:11,347 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 267 transitions. [2022-01-31 19:57:11,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:11,348 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 267 transitions. [2022-01-31 19:57:11,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:57:11,348 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:11,348 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:11,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2022-01-31 19:57:11,349 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:11,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:11,349 INFO L85 PathProgramCache]: Analyzing trace with hash 1024705443, now seen corresponding path program 59 times [2022-01-31 19:57:11,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:11,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1545658886] [2022-01-31 19:57:11,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:11,349 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:11,354 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:11,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:12,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:12,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:57:12,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:57:12,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:57:12,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:57:12,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:57:12,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:57:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:57:12,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:57:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:57:12,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:57:12,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:57:12,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,654 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:57:12,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:57:12,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:12,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:12,658 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:12,658 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1545658886] [2022-01-31 19:57:12,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1545658886] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:12,658 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:12,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:12,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680848448] [2022-01-31 19:57:12,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:12,658 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:12,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:12,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:12,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1049, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:12,659 INFO L87 Difference]: Start difference. First operand 239 states and 267 transitions. Second operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:16,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:16,168 INFO L93 Difference]: Finished difference Result 306 states and 348 transitions. [2022-01-31 19:57:16,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:57:16,168 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 146 [2022-01-31 19:57:16,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:16,169 INFO L225 Difference]: With dead ends: 306 [2022-01-31 19:57:16,169 INFO L226 Difference]: Without dead ends: 304 [2022-01-31 19:57:16,169 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1094 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=457, Invalid=5549, Unknown=0, NotChecked=0, Total=6006 [2022-01-31 19:57:16,170 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 141 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3680 mSolverCounterSat, 183 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 3863 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 183 IncrementalHoareTripleChecker+Valid, 3680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:16,171 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 180 Invalid, 3863 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [183 Valid, 3680 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:57:16,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2022-01-31 19:57:16,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 298. [2022-01-31 19:57:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 298 states, 226 states have (on average 1.0353982300884956) internal successors, (234), 230 states have internal predecessors, (234), 53 states have call successors, (53), 19 states have call predecessors, (53), 18 states have return successors, (52), 48 states have call predecessors, (52), 52 states have call successors, (52) [2022-01-31 19:57:16,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 298 states to 298 states and 339 transitions. [2022-01-31 19:57:16,439 INFO L78 Accepts]: Start accepts. Automaton has 298 states and 339 transitions. Word has length 146 [2022-01-31 19:57:16,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:16,439 INFO L470 AbstractCegarLoop]: Abstraction has 298 states and 339 transitions. [2022-01-31 19:57:16,451 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 32 states have internal predecessors, (73), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:16,451 INFO L276 IsEmpty]: Start isEmpty. Operand 298 states and 339 transitions. [2022-01-31 19:57:16,452 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2022-01-31 19:57:16,452 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:16,452 INFO L514 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:16,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2022-01-31 19:57:16,452 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:16,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:16,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1438069065, now seen corresponding path program 60 times [2022-01-31 19:57:16,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:16,453 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [534810334] [2022-01-31 19:57:16,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:16,453 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:16,456 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:16,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:17,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:17,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:17,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:17,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:17,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:17,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:57:17,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:57:18,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:57:18,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:57:18,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:57:18,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:57:18,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:57:18,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:57:18,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,020 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:57:18,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:57:18,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:57:18,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:57:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:18,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:18,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:18,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [534810334] [2022-01-31 19:57:18,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [534810334] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:18,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:18,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:57:18,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947616501] [2022-01-31 19:57:18,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:18,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:57:18,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:18,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:57:18,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1080, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:57:18,031 INFO L87 Difference]: Start difference. First operand 298 states and 339 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:20,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:20,764 INFO L93 Difference]: Finished difference Result 389 states and 449 transitions. [2022-01-31 19:57:20,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:57:20,766 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 146 [2022-01-31 19:57:20,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:20,767 INFO L225 Difference]: With dead ends: 389 [2022-01-31 19:57:20,767 INFO L226 Difference]: Without dead ends: 387 [2022-01-31 19:57:20,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=341, Invalid=4215, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 19:57:20,768 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 161 mSDsluCounter, 94 mSDsCounter, 0 mSdLazyCounter, 3731 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 171 SdHoareTripleChecker+Invalid, 3897 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 3731 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:20,776 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 171 Invalid, 3897 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 3731 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:57:20,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2022-01-31 19:57:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 347. [2022-01-31 19:57:21,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 263 states have (on average 1.0342205323193916) internal successors, (272), 268 states have internal predecessors, (272), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:21,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 401 transitions. [2022-01-31 19:57:21,097 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 401 transitions. Word has length 146 [2022-01-31 19:57:21,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:21,097 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 401 transitions. [2022-01-31 19:57:21,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:21,097 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 401 transitions. [2022-01-31 19:57:21,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 19:57:21,098 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:21,098 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:21,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2022-01-31 19:57:21,098 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:21,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:21,099 INFO L85 PathProgramCache]: Analyzing trace with hash -2035803647, now seen corresponding path program 61 times [2022-01-31 19:57:21,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:21,099 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [659705846] [2022-01-31 19:57:21,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:21,099 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:21,104 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:21,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:21,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:21,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:21,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:57:21,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:57:21,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:57:21,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:57:21,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:57:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:57:21,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,972 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:57:21,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:57:21,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:57:21,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:57:21,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:57:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,980 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:57:21,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:57:21,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:21,983 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:21,983 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:21,984 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [659705846] [2022-01-31 19:57:21,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [659705846] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:21,984 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:21,984 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:21,984 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761442509] [2022-01-31 19:57:21,984 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:21,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:21,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:21,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:21,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:21,985 INFO L87 Difference]: Start difference. First operand 347 states and 401 transitions. Second operand has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:25,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:25,129 INFO L93 Difference]: Finished difference Result 415 states and 483 transitions. [2022-01-31 19:57:25,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:57:25,129 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 148 [2022-01-31 19:57:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:25,131 INFO L225 Difference]: With dead ends: 415 [2022-01-31 19:57:25,131 INFO L226 Difference]: Without dead ends: 413 [2022-01-31 19:57:25,131 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 115 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1198 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=393, Invalid=6087, Unknown=0, NotChecked=0, Total=6480 [2022-01-31 19:57:25,133 INFO L933 BasicCegarLoop]: 64 mSDtfsCounter, 100 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 4333 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 192 SdHoareTripleChecker+Invalid, 4471 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4333 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:25,133 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 192 Invalid, 4471 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4333 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:57:25,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2022-01-31 19:57:25,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 347. [2022-01-31 19:57:25,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 263 states have (on average 1.0342205323193916) internal successors, (272), 268 states have internal predecessors, (272), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:25,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 401 transitions. [2022-01-31 19:57:25,433 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 401 transitions. Word has length 148 [2022-01-31 19:57:25,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:25,433 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 401 transitions. [2022-01-31 19:57:25,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.272727272727273) internal successors, (75), 32 states have internal predecessors, (75), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:25,433 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 401 transitions. [2022-01-31 19:57:25,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:57:25,434 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:25,434 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 7, 7, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:25,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2022-01-31 19:57:25,434 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:25,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:25,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1355159239, now seen corresponding path program 62 times [2022-01-31 19:57:25,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:25,435 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1773729635] [2022-01-31 19:57:25,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:25,435 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:25,437 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:25,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,665 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:25,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:25,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:25,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,669 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 34 [2022-01-31 19:57:25,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:57:25,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:57:25,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:57:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:57:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:57:25,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:57:25,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,680 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:57:25,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:57:25,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:57:25,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:57:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,686 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:57:25,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,687 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:57:25,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,689 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:57:25,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:25,691 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:25,691 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1773729635] [2022-01-31 19:57:25,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1773729635] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:25,691 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:25,691 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-01-31 19:57:25,691 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649510220] [2022-01-31 19:57:25,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:25,691 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-01-31 19:57:25,691 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:25,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-01-31 19:57:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2022-01-31 19:57:25,692 INFO L87 Difference]: Start difference. First operand 347 states and 401 transitions. Second operand has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:57:26,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:26,593 INFO L93 Difference]: Finished difference Result 417 states and 485 transitions. [2022-01-31 19:57:26,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2022-01-31 19:57:26,594 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 150 [2022-01-31 19:57:26,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:26,595 INFO L225 Difference]: With dead ends: 417 [2022-01-31 19:57:26,595 INFO L226 Difference]: Without dead ends: 349 [2022-01-31 19:57:26,595 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 595 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=526, Invalid=1924, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 19:57:26,596 INFO L933 BasicCegarLoop]: 46 mSDtfsCounter, 177 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 609 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 83 SdHoareTripleChecker+Invalid, 801 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:26,597 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 83 Invalid, 801 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 609 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:57:26,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2022-01-31 19:57:26,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2022-01-31 19:57:26,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 263 states have (on average 1.0304182509505704) internal successors, (271), 268 states have internal predecessors, (271), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:26,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 400 transitions. [2022-01-31 19:57:26,896 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 400 transitions. Word has length 150 [2022-01-31 19:57:26,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:26,896 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 400 transitions. [2022-01-31 19:57:26,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.6666666666666665) internal successors, (72), 26 states have internal predecessors, (72), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:57:26,896 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 400 transitions. [2022-01-31 19:57:26,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2022-01-31 19:57:26,897 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:26,897 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:26,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2022-01-31 19:57:26,897 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:26,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:26,897 INFO L85 PathProgramCache]: Analyzing trace with hash -1622440025, now seen corresponding path program 63 times [2022-01-31 19:57:26,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:26,897 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114712984] [2022-01-31 19:57:26,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:26,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:26,899 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:27,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:28,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:28,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:28,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:57:28,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:57:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:57:28,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:57:28,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:57:28,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:57:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:57:28,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:57:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:57:28,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:57:28,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:57:28,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:57:28,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:28,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:28,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:28,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114712984] [2022-01-31 19:57:28,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114712984] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:28,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:28,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:57:28,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567242866] [2022-01-31 19:57:28,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:28,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:57:28,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:28,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:57:28,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=1196, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:57:28,200 INFO L87 Difference]: Start difference. First operand 347 states and 400 transitions. Second operand has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:31,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:31,025 INFO L93 Difference]: Finished difference Result 449 states and 522 transitions. [2022-01-31 19:57:31,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:57:31,025 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 148 [2022-01-31 19:57:31,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:31,027 INFO L225 Difference]: With dead ends: 449 [2022-01-31 19:57:31,027 INFO L226 Difference]: Without dead ends: 447 [2022-01-31 19:57:31,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1510 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=450, Invalid=5402, Unknown=0, NotChecked=0, Total=5852 [2022-01-31 19:57:31,027 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 177 mSDsluCounter, 102 mSDsCounter, 0 mSdLazyCounter, 3989 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 178 SdHoareTripleChecker+Invalid, 4186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 3989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:31,027 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 178 Invalid, 4186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 3989 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:57:31,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2022-01-31 19:57:31,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 349. [2022-01-31 19:57:31,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 270 states have internal predecessors, (274), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:31,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2022-01-31 19:57:31,336 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 148 [2022-01-31 19:57:31,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:31,336 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2022-01-31 19:57:31,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2222222222222223) internal successors, (80), 35 states have internal predecessors, (80), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:31,336 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2022-01-31 19:57:31,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:57:31,337 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:31,337 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:31,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2022-01-31 19:57:31,337 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:31,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:31,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1132441377, now seen corresponding path program 64 times [2022-01-31 19:57:31,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:31,337 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [408139601] [2022-01-31 19:57:31,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:31,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:31,339 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:31,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:32,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:32,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:57:32,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:57:32,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:57:32,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:57:32,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:57:32,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:57:32,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:57:32,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,314 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:57:32,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,315 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:57:32,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,316 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:57:32,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,318 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:57:32,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,319 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:57:32,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,321 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:57:32,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:32,323 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:32,323 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:32,323 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [408139601] [2022-01-31 19:57:32,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [408139601] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:32,323 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:32,323 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:57:32,323 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170756313] [2022-01-31 19:57:32,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:32,323 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:57:32,323 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:32,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:57:32,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:57:32,324 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:35,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:35,605 INFO L93 Difference]: Finished difference Result 419 states and 487 transitions. [2022-01-31 19:57:35,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:57:35,606 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 150 [2022-01-31 19:57:35,606 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:35,608 INFO L225 Difference]: With dead ends: 419 [2022-01-31 19:57:35,608 INFO L226 Difference]: Without dead ends: 417 [2022-01-31 19:57:35,608 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1293 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=412, Invalid=6560, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:57:35,609 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 109 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 4706 mSolverCounterSat, 151 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 197 SdHoareTripleChecker+Invalid, 4857 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 151 IncrementalHoareTripleChecker+Valid, 4706 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:35,610 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 197 Invalid, 4857 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [151 Valid, 4706 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:57:35,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2022-01-31 19:57:35,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 349. [2022-01-31 19:57:35,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 270 states have internal predecessors, (274), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:35,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2022-01-31 19:57:35,969 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 150 [2022-01-31 19:57:35,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:35,969 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2022-01-31 19:57:35,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.264705882352941) internal successors, (77), 33 states have internal predecessors, (77), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:35,969 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2022-01-31 19:57:35,984 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:57:35,984 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:35,984 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:35,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2022-01-31 19:57:35,984 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:35,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:35,984 INFO L85 PathProgramCache]: Analyzing trace with hash -807411561, now seen corresponding path program 65 times [2022-01-31 19:57:35,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:35,984 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [400040204] [2022-01-31 19:57:35,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:35,985 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:35,986 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:36,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:36,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:36,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:36,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:57:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:57:36,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:57:36,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:57:36,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:57:36,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:57:36,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:57:36,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:57:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:57:36,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:57:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:57:36,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:57:36,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:57:36,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:57:36,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:36,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:36,936 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:36,936 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [400040204] [2022-01-31 19:57:36,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [400040204] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:36,936 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:36,936 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 19:57:36,936 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662371456] [2022-01-31 19:57:36,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:36,936 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 19:57:36,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:36,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 19:57:36,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=989, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 19:57:36,937 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 33 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:57:39,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:39,354 INFO L93 Difference]: Finished difference Result 385 states and 445 transitions. [2022-01-31 19:57:39,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2022-01-31 19:57:39,355 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 152 [2022-01-31 19:57:39,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:39,356 INFO L225 Difference]: With dead ends: 385 [2022-01-31 19:57:39,356 INFO L226 Difference]: Without dead ends: 383 [2022-01-31 19:57:39,356 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 903 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=327, Invalid=4929, Unknown=0, NotChecked=0, Total=5256 [2022-01-31 19:57:39,371 INFO L933 BasicCegarLoop]: 49 mSDtfsCounter, 88 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 3309 mSolverCounterSat, 114 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 3423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 114 IncrementalHoareTripleChecker+Valid, 3309 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:39,371 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 176 Invalid, 3423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [114 Valid, 3309 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2022-01-31 19:57:39,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 383 states. [2022-01-31 19:57:39,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 383 to 349. [2022-01-31 19:57:39,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 265 states have (on average 1.0339622641509434) internal successors, (274), 270 states have internal predecessors, (274), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 403 transitions. [2022-01-31 19:57:39,798 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 403 transitions. Word has length 152 [2022-01-31 19:57:39,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:39,798 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 403 transitions. [2022-01-31 19:57:39,798 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 32 states have (on average 2.3125) internal successors, (74), 31 states have internal predecessors, (74), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:57:39,798 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 403 transitions. [2022-01-31 19:57:39,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2022-01-31 19:57:39,799 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:39,799 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:39,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2022-01-31 19:57:39,800 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:39,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:39,800 INFO L85 PathProgramCache]: Analyzing trace with hash -719077755, now seen corresponding path program 66 times [2022-01-31 19:57:39,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:39,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [446086364] [2022-01-31 19:57:39,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:39,800 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:39,802 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:39,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:41,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:41,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:41,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:57:41,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:57:41,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:57:41,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,028 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:57:41,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:57:41,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:57:41,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:57:41,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:57:41,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:57:41,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:57:41,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:57:41,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:57:41,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:41,068 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:41,068 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:41,068 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [446086364] [2022-01-31 19:57:41,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [446086364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:41,069 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:41,069 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:57:41,069 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309575718] [2022-01-31 19:57:41,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:41,069 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:57:41,069 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:41,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:57:41,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=138, Invalid=1268, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:57:41,070 INFO L87 Difference]: Start difference. First operand 349 states and 403 transitions. Second operand has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:43,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:43,981 INFO L93 Difference]: Finished difference Result 454 states and 528 transitions. [2022-01-31 19:57:43,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-01-31 19:57:43,981 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 150 [2022-01-31 19:57:43,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:43,983 INFO L225 Difference]: With dead ends: 454 [2022-01-31 19:57:43,983 INFO L226 Difference]: Without dead ends: 452 [2022-01-31 19:57:43,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1620 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=452, Invalid=5868, Unknown=0, NotChecked=0, Total=6320 [2022-01-31 19:57:43,984 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 180 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 4097 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 183 SdHoareTripleChecker+Valid, 179 SdHoareTripleChecker+Invalid, 4307 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 4097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:43,984 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [183 Valid, 179 Invalid, 4307 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 4097 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:57:43,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2022-01-31 19:57:44,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 351. [2022-01-31 19:57:44,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 351 states, 267 states have (on average 1.0374531835205993) internal successors, (277), 272 states have internal predecessors, (277), 65 states have call successors, (65), 19 states have call predecessors, (65), 18 states have return successors, (64), 59 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 19:57:44,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 406 transitions. [2022-01-31 19:57:44,289 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 406 transitions. Word has length 150 [2022-01-31 19:57:44,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:44,289 INFO L470 AbstractCegarLoop]: Abstraction has 351 states and 406 transitions. [2022-01-31 19:57:44,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2162162162162162) internal successors, (82), 36 states have internal predecessors, (82), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:57:44,289 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 406 transitions. [2022-01-31 19:57:44,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:57:44,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:44,290 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:44,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2022-01-31 19:57:44,290 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:44,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:44,290 INFO L85 PathProgramCache]: Analyzing trace with hash -584693699, now seen corresponding path program 67 times [2022-01-31 19:57:44,290 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:44,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2093193292] [2022-01-31 19:57:44,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:44,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:44,292 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:44,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:45,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:45,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:57:45,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:57:45,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:57:45,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:57:45,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:57:45,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:57:45,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:57:45,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:57:45,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:57:45,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:57:45,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:57:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:57:45,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,495 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:57:45,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:45,497 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:45,497 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:45,497 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2093193292] [2022-01-31 19:57:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2093193292] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:45,497 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:45,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:57:45,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351405545] [2022-01-31 19:57:45,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:45,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:57:45,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:57:45,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:57:45,498 INFO L87 Difference]: Start difference. First operand 351 states and 406 transitions. Second operand has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:50,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:50,636 INFO L93 Difference]: Finished difference Result 383 states and 442 transitions. [2022-01-31 19:57:50,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:57:50,637 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 152 [2022-01-31 19:57:50,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:50,638 INFO L225 Difference]: With dead ends: 383 [2022-01-31 19:57:50,638 INFO L226 Difference]: Without dead ends: 381 [2022-01-31 19:57:50,639 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1340 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=407, Invalid=6903, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:57:50,639 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 125 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5719 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 5875 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 5719 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:50,639 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 220 Invalid, 5875 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 5719 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:57:50,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 381 states. [2022-01-31 19:57:50,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 381 to 300. [2022-01-31 19:57:50,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 229 states have (on average 1.0436681222707425) internal successors, (239), 233 states have internal predecessors, (239), 52 states have call successors, (52), 19 states have call predecessors, (52), 18 states have return successors, (51), 47 states have call predecessors, (51), 51 states have call successors, (51) [2022-01-31 19:57:50,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 342 transitions. [2022-01-31 19:57:50,900 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 342 transitions. Word has length 152 [2022-01-31 19:57:50,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:50,900 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 342 transitions. [2022-01-31 19:57:50,901 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.257142857142857) internal successors, (79), 34 states have internal predecessors, (79), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:57:50,901 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 342 transitions. [2022-01-31 19:57:50,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:57:50,903 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:50,903 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:50,903 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2022-01-31 19:57:50,904 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:50,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:50,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1592096885, now seen corresponding path program 68 times [2022-01-31 19:57:50,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:50,904 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1702265574] [2022-01-31 19:57:50,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:50,904 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:50,906 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:50,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:51,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:51,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:51,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:57:51,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:57:51,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:57:51,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:57:51,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:57:51,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:57:51,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:57:51,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:57:51,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:57:51,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:57:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:57:51,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,732 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:57:51,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:57:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:57:51,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:51,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:51,762 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:51,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1702265574] [2022-01-31 19:57:51,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1702265574] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:51,762 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:51,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:57:51,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537151828] [2022-01-31 19:57:51,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:51,762 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:57:51,762 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:51,762 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:57:51,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:57:51,763 INFO L87 Difference]: Start difference. First operand 300 states and 342 transitions. Second operand has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:57:55,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:57:55,173 INFO L93 Difference]: Finished difference Result 371 states and 428 transitions. [2022-01-31 19:57:55,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:57:55,174 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 154 [2022-01-31 19:57:55,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:57:55,175 INFO L225 Difference]: With dead ends: 371 [2022-01-31 19:57:55,175 INFO L226 Difference]: Without dead ends: 369 [2022-01-31 19:57:55,175 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1112 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=373, Invalid=5789, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:57:55,179 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 86 mSDsluCounter, 125 mSDsCounter, 0 mSdLazyCounter, 3888 mSolverCounterSat, 124 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 89 SdHoareTripleChecker+Valid, 183 SdHoareTripleChecker+Invalid, 4012 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 124 IncrementalHoareTripleChecker+Valid, 3888 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2022-01-31 19:57:55,179 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [89 Valid, 183 Invalid, 4012 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [124 Valid, 3888 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2022-01-31 19:57:55,183 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 369 states. [2022-01-31 19:57:55,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 369 to 363. [2022-01-31 19:57:55,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 363 states, 276 states have (on average 1.036231884057971) internal successors, (286), 281 states have internal predecessors, (286), 67 states have call successors, (67), 20 states have call predecessors, (67), 19 states have return successors, (66), 61 states have call predecessors, (66), 66 states have call successors, (66) [2022-01-31 19:57:55,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 363 states to 363 states and 419 transitions. [2022-01-31 19:57:55,516 INFO L78 Accepts]: Start accepts. Automaton has 363 states and 419 transitions. Word has length 154 [2022-01-31 19:57:55,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:57:55,517 INFO L470 AbstractCegarLoop]: Abstraction has 363 states and 419 transitions. [2022-01-31 19:57:55,517 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.303030303030303) internal successors, (76), 32 states have internal predecessors, (76), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:57:55,517 INFO L276 IsEmpty]: Start isEmpty. Operand 363 states and 419 transitions. [2022-01-31 19:57:55,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2022-01-31 19:57:55,518 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:57:55,518 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 13, 13, 13, 12, 12, 12, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:57:55,518 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2022-01-31 19:57:55,518 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:57:55,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:57:55,518 INFO L85 PathProgramCache]: Analyzing trace with hash -171330077, now seen corresponding path program 69 times [2022-01-31 19:57:55,518 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:57:55,518 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [191678563] [2022-01-31 19:57:55,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:57:55,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:57:55,520 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:57:55,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,063 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:57:57,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,065 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:57:57,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,066 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:57:57,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,067 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:57:57,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,069 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:57:57,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,070 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:57:57,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:57:57,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,081 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:57:57,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:57:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:57:57,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:57:57,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,090 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:57:57,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:57:57,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,093 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:57:57,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:57:57,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:57:57,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:57:57,097 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:57:57,097 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [191678563] [2022-01-31 19:57:57,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [191678563] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:57:57,097 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:57:57,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:57:57,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [352953407] [2022-01-31 19:57:57,098 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:57:57,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:57:57,098 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:57:57,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:57:57,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=1226, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:57:57,098 INFO L87 Difference]: Start difference. First operand 363 states and 419 transitions. Second operand has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:58:00,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:00,533 INFO L93 Difference]: Finished difference Result 416 states and 479 transitions. [2022-01-31 19:58:00,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-01-31 19:58:00,534 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) Word has length 152 [2022-01-31 19:58:00,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:00,559 INFO L225 Difference]: With dead ends: 416 [2022-01-31 19:58:00,560 INFO L226 Difference]: Without dead ends: 414 [2022-01-31 19:58:00,560 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1152 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=302, Invalid=4528, Unknown=0, NotChecked=0, Total=4830 [2022-01-31 19:58:00,560 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 149 mSDsluCounter, 126 mSDsCounter, 0 mSdLazyCounter, 5325 mSolverCounterSat, 171 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 207 SdHoareTripleChecker+Invalid, 5496 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 171 IncrementalHoareTripleChecker+Valid, 5325 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:00,560 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [152 Valid, 207 Invalid, 5496 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [171 Valid, 5325 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 19:58:00,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2022-01-31 19:58:00,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 310. [2022-01-31 19:58:00,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 235 states have (on average 1.0297872340425531) internal successors, (242), 239 states have internal predecessors, (242), 55 states have call successors, (55), 20 states have call predecessors, (55), 19 states have return successors, (54), 50 states have call predecessors, (54), 54 states have call successors, (54) [2022-01-31 19:58:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 351 transitions. [2022-01-31 19:58:00,868 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 351 transitions. Word has length 152 [2022-01-31 19:58:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:00,868 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 351 transitions. [2022-01-31 19:58:00,868 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 14 states have call successors, (17), 3 states have call predecessors, (17), 1 states have return successors, (15), 13 states have call predecessors, (15), 13 states have call successors, (15) [2022-01-31 19:58:00,868 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 351 transitions. [2022-01-31 19:58:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2022-01-31 19:58:00,869 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:00,869 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2022-01-31 19:58:00,869 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:00,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:00,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1814814747, now seen corresponding path program 70 times [2022-01-31 19:58:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:00,870 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1741417508] [2022-01-31 19:58:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:00,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:00,872 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:00,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,866 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:01,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:01,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:01,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:58:01,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:58:01,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:58:01,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:58:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:58:01,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:58:01,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:58:01,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:58:01,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:58:01,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:58:01,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:58:01,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:58:01,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:58:01,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:01,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:01,918 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:01,918 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1741417508] [2022-01-31 19:58:01,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1741417508] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:01,919 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:01,919 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:58:01,919 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [38820457] [2022-01-31 19:58:01,919 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:01,919 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:58:01,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:01,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:58:01,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=1188, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:58:01,919 INFO L87 Difference]: Start difference. First operand 310 states and 351 transitions. Second operand has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:06,025 INFO L93 Difference]: Finished difference Result 404 states and 465 transitions. [2022-01-31 19:58:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:58:06,025 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 154 [2022-01-31 19:58:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:06,027 INFO L225 Difference]: With dead ends: 404 [2022-01-31 19:58:06,027 INFO L226 Difference]: Without dead ends: 402 [2022-01-31 19:58:06,027 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1271 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=403, Invalid=6907, Unknown=0, NotChecked=0, Total=7310 [2022-01-31 19:58:06,028 INFO L933 BasicCegarLoop]: 78 mSDtfsCounter, 131 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5859 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 134 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 6018 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 5859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:06,028 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [134 Valid, 220 Invalid, 6018 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 5859 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:58:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 402 states. [2022-01-31 19:58:06,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 402 to 371. [2022-01-31 19:58:06,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 281 states have (on average 1.0284697508896796) internal successors, (289), 286 states have internal predecessors, (289), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 19:58:06,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 426 transitions. [2022-01-31 19:58:06,388 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 426 transitions. Word has length 154 [2022-01-31 19:58:06,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:06,388 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 426 transitions. [2022-01-31 19:58:06,388 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:06,388 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 426 transitions. [2022-01-31 19:58:06,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:58:06,389 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:06,389 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:06,389 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2022-01-31 19:58:06,389 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:06,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:06,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1122275539, now seen corresponding path program 71 times [2022-01-31 19:58:06,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:06,390 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [119116605] [2022-01-31 19:58:06,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:06,390 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:06,392 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:06,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:07,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:07,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,373 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:07,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:58:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:58:07,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:58:07,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:58:07,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:58:07,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:58:07,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:58:07,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:58:07,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:58:07,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:58:07,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:58:07,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:58:07,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:58:07,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:58:07,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:07,394 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:07,394 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:07,394 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [119116605] [2022-01-31 19:58:07,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [119116605] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:07,394 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:07,394 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:58:07,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083371812] [2022-01-31 19:58:07,395 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:07,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:58:07,395 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:07,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:58:07,395 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=1119, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:58:07,395 INFO L87 Difference]: Start difference. First operand 371 states and 426 transitions. Second operand has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:10,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:10,623 INFO L93 Difference]: Finished difference Result 442 states and 512 transitions. [2022-01-31 19:58:10,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:58:10,623 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 156 [2022-01-31 19:58:10,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:10,625 INFO L225 Difference]: With dead ends: 442 [2022-01-31 19:58:10,625 INFO L226 Difference]: Without dead ends: 440 [2022-01-31 19:58:10,625 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1252 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=399, Invalid=6407, Unknown=0, NotChecked=0, Total=6806 [2022-01-31 19:58:10,627 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 97 mSDsluCounter, 127 mSDsCounter, 0 mSdLazyCounter, 4289 mSolverCounterSat, 138 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 190 SdHoareTripleChecker+Invalid, 4427 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 138 IncrementalHoareTripleChecker+Valid, 4289 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:10,627 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [100 Valid, 190 Invalid, 4427 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [138 Valid, 4289 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:58:10,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2022-01-31 19:58:11,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 426. [2022-01-31 19:58:11,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 426 states, 322 states have (on average 1.0248447204968945) internal successors, (330), 328 states have internal predecessors, (330), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 19:58:11,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 426 states to 426 states and 495 transitions. [2022-01-31 19:58:11,054 INFO L78 Accepts]: Start accepts. Automaton has 426 states and 495 transitions. Word has length 156 [2022-01-31 19:58:11,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:11,054 INFO L470 AbstractCegarLoop]: Abstraction has 426 states and 495 transitions. [2022-01-31 19:58:11,054 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.2941176470588234) internal successors, (78), 33 states have internal predecessors, (78), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:11,054 INFO L276 IsEmpty]: Start isEmpty. Operand 426 states and 495 transitions. [2022-01-31 19:58:11,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2022-01-31 19:58:11,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:11,055 INFO L514 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:11,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2022-01-31 19:58:11,055 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:11,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:11,055 INFO L85 PathProgramCache]: Analyzing trace with hash 1344993401, now seen corresponding path program 72 times [2022-01-31 19:58:11,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:11,055 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1698239784] [2022-01-31 19:58:11,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:11,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:11,058 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:12,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:12,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:12,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:58:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:58:12,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,256 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:58:12,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,260 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:58:12,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:58:12,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:58:12,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:58:12,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:58:12,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:58:12,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:58:12,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:58:12,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:58:12,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:58:12,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:12,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:12,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:12,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1698239784] [2022-01-31 19:58:12,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1698239784] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:12,276 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:12,276 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:58:12,276 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622231589] [2022-01-31 19:58:12,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:12,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:58:12,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:12,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:58:12,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1255, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:58:12,276 INFO L87 Difference]: Start difference. First operand 426 states and 495 transitions. Second operand has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:15,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:15,723 INFO L93 Difference]: Finished difference Result 529 states and 620 transitions. [2022-01-31 19:58:15,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 19:58:15,723 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 156 [2022-01-31 19:58:15,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:15,725 INFO L225 Difference]: With dead ends: 529 [2022-01-31 19:58:15,725 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 19:58:15,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=322, Invalid=4790, Unknown=0, NotChecked=0, Total=5112 [2022-01-31 19:58:15,726 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 169 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 6132 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 6310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 6132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:15,726 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [172 Valid, 224 Invalid, 6310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 6132 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 19:58:15,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 19:58:16,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 428. [2022-01-31 19:58:16,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 324 states have (on average 1.0277777777777777) internal successors, (333), 330 states have internal predecessors, (333), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 19:58:16,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2022-01-31 19:58:16,148 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 156 [2022-01-31 19:58:16,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:16,148 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2022-01-31 19:58:16,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:16,148 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2022-01-31 19:58:16,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:58:16,149 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:16,149 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:16,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2022-01-31 19:58:16,149 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:16,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:16,149 INFO L85 PathProgramCache]: Analyzing trace with hash 595528113, now seen corresponding path program 73 times [2022-01-31 19:58:16,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:16,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653109917] [2022-01-31 19:58:16,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:16,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:16,152 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:16,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:17,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:17,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:17,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,417 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:58:17,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:58:17,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:58:17,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:58:17,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:58:17,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:58:17,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:58:17,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,438 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:58:17,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:58:17,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:58:17,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:58:17,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:58:17,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:58:17,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,445 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:58:17,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:17,447 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:17,447 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:17,447 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653109917] [2022-01-31 19:58:17,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653109917] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:17,447 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:17,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:58:17,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277958924] [2022-01-31 19:58:17,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:17,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:58:17,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:17,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:58:17,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:58:17,448 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:21,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:21,505 INFO L93 Difference]: Finished difference Result 499 states and 584 transitions. [2022-01-31 19:58:21,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 19:58:21,506 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 158 [2022-01-31 19:58:21,506 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:21,507 INFO L225 Difference]: With dead ends: 499 [2022-01-31 19:58:21,507 INFO L226 Difference]: Without dead ends: 497 [2022-01-31 19:58:21,508 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1250 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=385, Invalid=6587, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:58:21,509 INFO L933 BasicCegarLoop]: 68 mSDtfsCounter, 106 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 5151 mSolverCounterSat, 136 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 109 SdHoareTripleChecker+Valid, 209 SdHoareTripleChecker+Invalid, 5287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 136 IncrementalHoareTripleChecker+Valid, 5151 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:21,510 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [109 Valid, 209 Invalid, 5287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [136 Valid, 5151 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:58:21,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 497 states. [2022-01-31 19:58:21,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 497 to 428. [2022-01-31 19:58:21,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 324 states have (on average 1.0277777777777777) internal successors, (333), 330 states have internal predecessors, (333), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 19:58:21,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2022-01-31 19:58:21,952 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 158 [2022-01-31 19:58:21,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:21,952 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2022-01-31 19:58:21,952 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 34 states have internal predecessors, (80), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:21,952 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2022-01-31 19:58:21,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:58:21,953 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:21,953 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:21,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2022-01-31 19:58:21,953 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:21,953 INFO L85 PathProgramCache]: Analyzing trace with hash 856645993, now seen corresponding path program 74 times [2022-01-31 19:58:21,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:21,954 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [102794372] [2022-01-31 19:58:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:21,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:21,956 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:21,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:23,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:23,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:58:23,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:58:23,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:58:23,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:58:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:58:23,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,282 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:58:23,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,284 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:58:23,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,285 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:58:23,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:58:23,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:58:23,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:58:23,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:58:23,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:58:23,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:58:23,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:58:23,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:23,297 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:23,297 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:23,297 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [102794372] [2022-01-31 19:58:23,297 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [102794372] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:23,297 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:23,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [34] imperfect sequences [] total 34 [2022-01-31 19:58:23,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935732023] [2022-01-31 19:58:23,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:23,298 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-01-31 19:58:23,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:23,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-01-31 19:58:23,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=1053, Unknown=0, NotChecked=0, Total=1122 [2022-01-31 19:58:23,298 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:58:26,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:26,469 INFO L93 Difference]: Finished difference Result 468 states and 545 transitions. [2022-01-31 19:58:26,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-01-31 19:58:26,470 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 160 [2022-01-31 19:58:26,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:26,471 INFO L225 Difference]: With dead ends: 468 [2022-01-31 19:58:26,471 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 19:58:26,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 948 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=329, Invalid=5221, Unknown=0, NotChecked=0, Total=5550 [2022-01-31 19:58:26,472 INFO L933 BasicCegarLoop]: 51 mSDtfsCounter, 89 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 3362 mSolverCounterSat, 117 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 173 SdHoareTripleChecker+Invalid, 3479 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 117 IncrementalHoareTripleChecker+Valid, 3362 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:26,472 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [92 Valid, 173 Invalid, 3479 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [117 Valid, 3362 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2022-01-31 19:58:26,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 19:58:26,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 428. [2022-01-31 19:58:26,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 428 states, 324 states have (on average 1.0277777777777777) internal successors, (333), 330 states have internal predecessors, (333), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 19:58:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 428 states to 428 states and 498 transitions. [2022-01-31 19:58:26,905 INFO L78 Accepts]: Start accepts. Automaton has 428 states and 498 transitions. Word has length 160 [2022-01-31 19:58:26,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:26,905 INFO L470 AbstractCegarLoop]: Abstraction has 428 states and 498 transitions. [2022-01-31 19:58:26,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 33 states have (on average 2.3333333333333335) internal successors, (77), 32 states have internal predecessors, (77), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:58:26,905 INFO L276 IsEmpty]: Start isEmpty. Operand 428 states and 498 transitions. [2022-01-31 19:58:26,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2022-01-31 19:58:26,906 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:26,906 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:26,906 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2022-01-31 19:58:26,907 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:26,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:26,907 INFO L85 PathProgramCache]: Analyzing trace with hash 818245975, now seen corresponding path program 75 times [2022-01-31 19:58:26,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:26,907 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [335035224] [2022-01-31 19:58:26,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:26,911 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:26,913 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:26,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:28,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:28,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:28,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:58:28,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:58:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:58:28,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:58:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:58:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:58:28,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:58:28,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:58:28,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:58:28,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:58:28,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:58:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:58:28,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:58:28,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:28,171 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:28,171 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:28,171 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [335035224] [2022-01-31 19:58:28,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [335035224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:28,171 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:28,171 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:58:28,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178493816] [2022-01-31 19:58:28,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:28,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:58:28,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:28,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:58:28,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1397, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:58:28,172 INFO L87 Difference]: Start difference. First operand 428 states and 498 transitions. Second operand has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:32,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:32,567 INFO L93 Difference]: Finished difference Result 596 states and 702 transitions. [2022-01-31 19:58:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:58:32,568 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 158 [2022-01-31 19:58:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:32,569 INFO L225 Difference]: With dead ends: 596 [2022-01-31 19:58:32,569 INFO L226 Difference]: Without dead ends: 594 [2022-01-31 19:58:32,570 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1062 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=420, Invalid=6222, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:58:32,570 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 189 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6623 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 232 SdHoareTripleChecker+Invalid, 6834 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 6623 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:32,570 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 232 Invalid, 6834 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 6623 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 19:58:32,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2022-01-31 19:58:33,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 430. [2022-01-31 19:58:33,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 430 states, 326 states have (on average 1.030674846625767) internal successors, (336), 332 states have internal predecessors, (336), 83 states have call successors, (83), 21 states have call predecessors, (83), 20 states have return successors, (82), 76 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 19:58:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 430 states to 430 states and 501 transitions. [2022-01-31 19:58:33,008 INFO L78 Accepts]: Start accepts. Automaton has 430 states and 501 transitions. Word has length 158 [2022-01-31 19:58:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:33,008 INFO L470 AbstractCegarLoop]: Abstraction has 430 states and 501 transitions. [2022-01-31 19:58:33,008 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.236842105263158) internal successors, (85), 37 states have internal predecessors, (85), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 430 states and 501 transitions. [2022-01-31 19:58:33,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:58:33,009 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:33,009 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:33,009 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2022-01-31 19:58:33,009 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:33,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:33,010 INFO L85 PathProgramCache]: Analyzing trace with hash 1197392655, now seen corresponding path program 76 times [2022-01-31 19:58:33,010 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:33,010 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2025731704] [2022-01-31 19:58:33,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:33,010 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:33,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:33,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,977 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:33,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:33,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:33,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:58:33,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:58:33,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:58:33,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:58:33,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:58:33,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:58:33,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:58:33,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:58:33,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:58:33,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:58:33,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:58:33,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:58:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:58:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:33,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:58:34,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:34,001 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:34,001 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:34,001 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2025731704] [2022-01-31 19:58:34,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2025731704] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:34,001 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:34,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:58:34,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068788660] [2022-01-31 19:58:34,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:34,002 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:58:34,002 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:34,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:58:34,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:58:34,002 INFO L87 Difference]: Start difference. First operand 430 states and 501 transitions. Second operand has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:38,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:38,085 INFO L93 Difference]: Finished difference Result 457 states and 531 transitions. [2022-01-31 19:58:38,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:58:38,085 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 160 [2022-01-31 19:58:38,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:38,087 INFO L225 Difference]: With dead ends: 457 [2022-01-31 19:58:38,087 INFO L226 Difference]: Without dead ends: 455 [2022-01-31 19:58:38,087 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1503 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=444, Invalid=7566, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 19:58:38,087 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 118 mSDsluCounter, 147 mSDsCounter, 0 mSdLazyCounter, 5744 mSolverCounterSat, 164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 121 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 5908 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 164 IncrementalHoareTripleChecker+Valid, 5744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:38,087 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [121 Valid, 219 Invalid, 5908 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [164 Valid, 5744 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:58:38,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-31 19:58:38,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 375. [2022-01-31 19:58:38,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 285 states have (on average 1.0350877192982457) internal successors, (295), 290 states have internal predecessors, (295), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 19:58:38,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 432 transitions. [2022-01-31 19:58:38,453 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 432 transitions. Word has length 160 [2022-01-31 19:58:38,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:38,453 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 432 transitions. [2022-01-31 19:58:38,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.2777777777777777) internal successors, (82), 35 states have internal predecessors, (82), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:38,454 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 432 transitions. [2022-01-31 19:58:38,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:58:38,454 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:38,455 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:38,455 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2022-01-31 19:58:38,455 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:38,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:38,455 INFO L85 PathProgramCache]: Analyzing trace with hash -572114105, now seen corresponding path program 77 times [2022-01-31 19:58:38,455 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:38,455 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1717895442] [2022-01-31 19:58:38,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:38,455 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:38,458 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:38,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,753 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:39,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,755 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:39,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,756 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:39,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:58:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,758 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:58:39,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:58:39,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:58:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:58:39,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:58:39,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:58:39,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:58:39,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:58:39,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:58:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:58:39,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:58:39,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:58:39,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:58:39,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,781 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 19:58:39,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:39,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:39,784 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:39,784 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1717895442] [2022-01-31 19:58:39,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1717895442] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:39,784 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:39,784 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [35] imperfect sequences [] total 35 [2022-01-31 19:58:39,784 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283991965] [2022-01-31 19:58:39,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:39,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2022-01-31 19:58:39,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:39,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2022-01-31 19:58:39,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=1116, Unknown=0, NotChecked=0, Total=1190 [2022-01-31 19:58:39,785 INFO L87 Difference]: Start difference. First operand 375 states and 432 transitions. Second operand has 35 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:58:43,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:43,562 INFO L93 Difference]: Finished difference Result 395 states and 454 transitions. [2022-01-31 19:58:43,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2022-01-31 19:58:43,562 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 162 [2022-01-31 19:58:43,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:43,563 INFO L225 Difference]: With dead ends: 395 [2022-01-31 19:58:43,563 INFO L226 Difference]: Without dead ends: 393 [2022-01-31 19:58:43,564 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1034 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=418, Invalid=5744, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:58:43,564 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 113 mSDsluCounter, 128 mSDsCounter, 0 mSdLazyCounter, 3973 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 186 SdHoareTripleChecker+Invalid, 4117 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 3973 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:43,564 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 186 Invalid, 4117 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 3973 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:58:43,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 393 states. [2022-01-31 19:58:43,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 393 to 375. [2022-01-31 19:58:43,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 285 states have (on average 1.0350877192982457) internal successors, (295), 290 states have internal predecessors, (295), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 19:58:43,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 432 transitions. [2022-01-31 19:58:43,943 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 432 transitions. Word has length 162 [2022-01-31 19:58:43,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:43,943 INFO L470 AbstractCegarLoop]: Abstraction has 375 states and 432 transitions. [2022-01-31 19:58:43,943 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 34 states have (on average 2.323529411764706) internal successors, (79), 33 states have internal predecessors, (79), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:58:43,943 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 432 transitions. [2022-01-31 19:58:43,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2022-01-31 19:58:43,944 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:43,944 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:43,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2022-01-31 19:58:43,945 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:43,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:43,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1420110517, now seen corresponding path program 78 times [2022-01-31 19:58:43,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:43,946 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [229002783] [2022-01-31 19:58:43,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:43,946 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:43,948 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:45,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:45,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:45,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:58:45,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:58:45,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,184 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:58:45,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:58:45,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:58:45,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:58:45,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:58:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:58:45,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:58:45,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:58:45,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:58:45,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:58:45,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:58:45,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:45,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:45,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:45,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [229002783] [2022-01-31 19:58:45,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [229002783] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:45,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:45,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:58:45,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715891974] [2022-01-31 19:58:45,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:45,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:58:45,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:45,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:58:45,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1473, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:58:45,200 INFO L87 Difference]: Start difference. First operand 375 states and 432 transitions. Second operand has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:49,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:49,866 INFO L93 Difference]: Finished difference Result 547 states and 641 transitions. [2022-01-31 19:58:49,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 19:58:49,866 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 160 [2022-01-31 19:58:49,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:49,868 INFO L225 Difference]: With dead ends: 547 [2022-01-31 19:58:49,868 INFO L226 Difference]: Without dead ends: 545 [2022-01-31 19:58:49,869 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1154 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=421, Invalid=6719, Unknown=0, NotChecked=0, Total=7140 [2022-01-31 19:58:49,869 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 191 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6981 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 194 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 7205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 6981 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:49,869 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [194 Valid, 237 Invalid, 7205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 6981 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:58:49,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2022-01-31 19:58:50,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 377. [2022-01-31 19:58:50,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 287 states have (on average 1.038327526132404) internal successors, (298), 292 states have internal predecessors, (298), 69 states have call successors, (69), 21 states have call predecessors, (69), 20 states have return successors, (68), 63 states have call predecessors, (68), 68 states have call successors, (68) [2022-01-31 19:58:50,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 435 transitions. [2022-01-31 19:58:50,245 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 435 transitions. Word has length 160 [2022-01-31 19:58:50,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:50,245 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 435 transitions. [2022-01-31 19:58:50,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.230769230769231) internal successors, (87), 38 states have internal predecessors, (87), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:58:50,245 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 435 transitions. [2022-01-31 19:58:50,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:58:50,246 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:50,246 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:50,246 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2022-01-31 19:58:50,246 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:50,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:50,247 INFO L85 PathProgramCache]: Analyzing trace with hash -231367443, now seen corresponding path program 79 times [2022-01-31 19:58:50,247 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:50,247 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [530202139] [2022-01-31 19:58:50,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:50,247 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:50,249 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:50,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:50,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:50,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:58:50,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:58:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:58:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:58:50,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:58:50,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:50,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:58:50,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:58:51,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:58:51,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:58:51,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:58:51,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:58:51,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:58:51,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,013 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:58:51,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 19:58:51,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:51,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:51,016 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:51,016 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [530202139] [2022-01-31 19:58:51,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [530202139] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:51,016 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:51,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:58:51,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550816724] [2022-01-31 19:58:51,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:51,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:58:51,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:51,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:58:51,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:58:51,017 INFO L87 Difference]: Start difference. First operand 377 states and 435 transitions. Second operand has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:55,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:58:55,216 INFO L93 Difference]: Finished difference Result 468 states and 545 transitions. [2022-01-31 19:58:55,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 19:58:55,216 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 162 [2022-01-31 19:58:55,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:58:55,232 INFO L225 Difference]: With dead ends: 468 [2022-01-31 19:58:55,232 INFO L226 Difference]: Without dead ends: 466 [2022-01-31 19:58:55,233 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1667 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=470, Invalid=8272, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:58:55,233 INFO L933 BasicCegarLoop]: 77 mSDtfsCounter, 130 mSDsluCounter, 145 mSDsCounter, 0 mSdLazyCounter, 6022 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 222 SdHoareTripleChecker+Invalid, 6201 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 6022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:58:55,233 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 222 Invalid, 6201 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 6022 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 19:58:55,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 466 states. [2022-01-31 19:58:55,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 466 to 440. [2022-01-31 19:58:55,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 334 states have (on average 1.032934131736527) internal successors, (345), 340 states have internal predecessors, (345), 84 states have call successors, (84), 22 states have call predecessors, (84), 21 states have return successors, (83), 77 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 19:58:55,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 512 transitions. [2022-01-31 19:58:55,719 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 512 transitions. Word has length 162 [2022-01-31 19:58:55,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:58:55,719 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 512 transitions. [2022-01-31 19:58:55,719 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.27027027027027) internal successors, (84), 36 states have internal predecessors, (84), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:58:55,719 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 512 transitions. [2022-01-31 19:58:55,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:58:55,720 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:58:55,720 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:58:55,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2022-01-31 19:58:55,720 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:58:55,720 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:58:55,720 INFO L85 PathProgramCache]: Analyzing trace with hash 778966437, now seen corresponding path program 80 times [2022-01-31 19:58:55,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:58:55,720 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [649053958] [2022-01-31 19:58:55,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:58:55,721 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:58:55,723 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:58:55,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:58:57,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:58:57,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:58:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:58:57,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:58:57,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:58:57,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:58:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:58:57,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:58:57,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:58:57,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:58:57,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:58:57,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:58:57,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:58:57,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:58:57,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:58:57,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:58:57,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:58:57,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:58:57,151 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:58:57,151 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:58:57,151 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [649053958] [2022-01-31 19:58:57,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [649053958] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:58:57,151 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:58:57,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:58:57,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059213705] [2022-01-31 19:58:57,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:58:57,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:58:57,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:58:57,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:58:57,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1185, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:58:57,152 INFO L87 Difference]: Start difference. First operand 440 states and 512 transitions. Second operand has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:00,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:00,879 INFO L93 Difference]: Finished difference Result 515 states and 603 transitions. [2022-01-31 19:59:00,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2022-01-31 19:59:00,879 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 164 [2022-01-31 19:59:00,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:00,881 INFO L225 Difference]: With dead ends: 515 [2022-01-31 19:59:00,881 INFO L226 Difference]: Without dead ends: 513 [2022-01-31 19:59:00,881 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1141 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=421, Invalid=6221, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 19:59:00,881 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 119 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4559 mSolverCounterSat, 150 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 4709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 150 IncrementalHoareTripleChecker+Valid, 4559 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:00,881 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 196 Invalid, 4709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [150 Valid, 4559 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2022-01-31 19:59:00,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 513 states. [2022-01-31 19:59:01,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 513 to 495. [2022-01-31 19:59:01,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 495 states, 375 states have (on average 1.0293333333333334) internal successors, (386), 382 states have internal predecessors, (386), 98 states have call successors, (98), 22 states have call predecessors, (98), 21 states have return successors, (97), 90 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 19:59:01,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 495 states to 495 states and 581 transitions. [2022-01-31 19:59:01,425 INFO L78 Accepts]: Start accepts. Automaton has 495 states and 581 transitions. Word has length 164 [2022-01-31 19:59:01,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:01,425 INFO L470 AbstractCegarLoop]: Abstraction has 495 states and 581 transitions. [2022-01-31 19:59:01,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.3142857142857145) internal successors, (81), 34 states have internal predecessors, (81), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:01,426 INFO L276 IsEmpty]: Start isEmpty. Operand 495 states and 581 transitions. [2022-01-31 19:59:01,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2022-01-31 19:59:01,427 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:01,427 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 14, 14, 14, 13, 13, 13, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:01,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2022-01-31 19:59:01,428 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:01,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash -8649581, now seen corresponding path program 81 times [2022-01-31 19:59:01,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:01,428 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [290634742] [2022-01-31 19:59:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:01,428 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:01,431 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:01,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,544 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:02,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,546 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:02,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:02,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,547 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:59:02,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,549 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:59:02,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,550 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:59:02,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,551 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:59:02,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,552 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:59:02,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,554 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:59:02,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:59:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,556 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:59:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:59:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:59:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:59:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:59:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 19:59:02,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:02,564 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:02,564 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:02,564 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [290634742] [2022-01-31 19:59:02,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [290634742] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:02,564 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:02,564 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:59:02,564 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227227119] [2022-01-31 19:59:02,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:02,564 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:59:02,564 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:02,565 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:59:02,565 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1400, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:59:02,565 INFO L87 Difference]: Start difference. First operand 495 states and 581 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:59:06,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:06,920 INFO L93 Difference]: Finished difference Result 561 states and 657 transitions. [2022-01-31 19:59:06,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:59:06,920 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) Word has length 162 [2022-01-31 19:59:06,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:06,923 INFO L225 Difference]: With dead ends: 561 [2022-01-31 19:59:06,923 INFO L226 Difference]: Without dead ends: 559 [2022-01-31 19:59:06,924 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1692 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=414, Invalid=8328, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 19:59:06,924 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 157 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 7350 mSolverCounterSat, 200 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 7550 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 200 IncrementalHoareTripleChecker+Valid, 7350 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:06,924 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 245 Invalid, 7550 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [200 Valid, 7350 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 19:59:06,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2022-01-31 19:59:07,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 442. [2022-01-31 19:59:07,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 334 states have (on average 1.0239520958083832) internal successors, (342), 340 states have internal predecessors, (342), 86 states have call successors, (86), 22 states have call predecessors, (86), 21 states have return successors, (85), 79 states have call predecessors, (85), 85 states have call successors, (85) [2022-01-31 19:59:07,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 513 transitions. [2022-01-31 19:59:07,416 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 513 transitions. Word has length 162 [2022-01-31 19:59:07,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:07,416 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 513 transitions. [2022-01-31 19:59:07,416 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 15 states have call successors, (18), 3 states have call predecessors, (18), 1 states have return successors, (16), 14 states have call predecessors, (16), 14 states have call successors, (16) [2022-01-31 19:59:07,417 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 513 transitions. [2022-01-31 19:59:07,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2022-01-31 19:59:07,418 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:07,418 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:07,418 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2022-01-31 19:59:07,418 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:07,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:07,418 INFO L85 PathProgramCache]: Analyzing trace with hash 1119713099, now seen corresponding path program 82 times [2022-01-31 19:59:07,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:07,418 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1111348546] [2022-01-31 19:59:07,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:07,418 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:07,421 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:07,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:08,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:08,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:59:08,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:59:08,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:59:08,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:59:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:59:08,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:59:08,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:59:08,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:59:08,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:59:08,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:59:08,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:59:08,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:59:08,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:59:08,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:59:08,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:08,148 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:08,148 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:08,148 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1111348546] [2022-01-31 19:59:08,148 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1111348546] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:08,148 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:08,148 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:59:08,148 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842075880] [2022-01-31 19:59:08,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:08,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:59:08,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:08,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:59:08,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1330, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:59:08,149 INFO L87 Difference]: Start difference. First operand 442 states and 513 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:59:11,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:11,825 INFO L93 Difference]: Finished difference Result 549 states and 643 transitions. [2022-01-31 19:59:11,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 19:59:11,825 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 164 [2022-01-31 19:59:11,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:11,827 INFO L225 Difference]: With dead ends: 549 [2022-01-31 19:59:11,827 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 19:59:11,831 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1534 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=466, Invalid=8090, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:59:11,831 INFO L933 BasicCegarLoop]: 83 mSDtfsCounter, 140 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6742 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 6927 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 6742 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:11,831 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [143 Valid, 234 Invalid, 6927 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 6742 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2022-01-31 19:59:11,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 19:59:12,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 507. [2022-01-31 19:59:12,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 383 states have (on average 1.0234986945169713) internal successors, (392), 390 states have internal predecessors, (392), 101 states have call successors, (101), 23 states have call predecessors, (101), 22 states have return successors, (100), 93 states have call predecessors, (100), 100 states have call successors, (100) [2022-01-31 19:59:12,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 593 transitions. [2022-01-31 19:59:12,449 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 593 transitions. Word has length 164 [2022-01-31 19:59:12,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:12,449 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 593 transitions. [2022-01-31 19:59:12,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:59:12,449 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 593 transitions. [2022-01-31 19:59:12,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:59:12,450 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:12,450 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:12,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2022-01-31 19:59:12,451 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:12,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:12,451 INFO L85 PathProgramCache]: Analyzing trace with hash 2087243907, now seen corresponding path program 83 times [2022-01-31 19:59:12,451 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:12,451 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [555763926] [2022-01-31 19:59:12,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:12,451 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:12,453 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:12,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,757 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:13,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,759 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:13,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,760 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:13,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,761 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:59:13,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,763 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:59:13,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:59:13,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:59:13,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,767 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:59:13,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:59:13,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:59:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:59:13,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,772 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:59:13,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:59:13,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:59:13,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,776 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:59:13,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:59:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:59:13,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 19:59:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:13,788 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:13,788 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:13,788 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [555763926] [2022-01-31 19:59:13,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [555763926] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:13,788 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:13,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:59:13,788 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820454353] [2022-01-31 19:59:13,788 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:13,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:59:13,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:13,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:59:13,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1256, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:59:13,789 INFO L87 Difference]: Start difference. First operand 507 states and 593 transitions. Second operand has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:18,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:18,637 INFO L93 Difference]: Finished difference Result 582 states and 684 transitions. [2022-01-31 19:59:18,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 19:59:18,638 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 166 [2022-01-31 19:59:18,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:18,639 INFO L225 Difference]: With dead ends: 582 [2022-01-31 19:59:18,639 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 19:59:18,640 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1341 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=429, Invalid=7053, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:59:18,640 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 122 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 4958 mSolverCounterSat, 158 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 203 SdHoareTripleChecker+Invalid, 5116 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 158 IncrementalHoareTripleChecker+Valid, 4958 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:18,640 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [125 Valid, 203 Invalid, 5116 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [158 Valid, 4958 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:59:18,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 19:59:19,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 566. [2022-01-31 19:59:19,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 566 states, 427 states have (on average 1.0210772833723654) internal successors, (436), 435 states have internal predecessors, (436), 116 states have call successors, (116), 23 states have call predecessors, (116), 22 states have return successors, (115), 107 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 19:59:19,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 566 states to 566 states and 667 transitions. [2022-01-31 19:59:19,283 INFO L78 Accepts]: Start accepts. Automaton has 566 states and 667 transitions. Word has length 166 [2022-01-31 19:59:19,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:19,283 INFO L470 AbstractCegarLoop]: Abstraction has 566 states and 667 transitions. [2022-01-31 19:59:19,283 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3055555555555554) internal successors, (83), 35 states have internal predecessors, (83), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:19,283 INFO L276 IsEmpty]: Start isEmpty. Operand 566 states and 667 transitions. [2022-01-31 19:59:19,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:59:19,284 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:19,284 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 8, 8, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:19,285 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2022-01-31 19:59:19,285 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:19,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:19,285 INFO L85 PathProgramCache]: Analyzing trace with hash -824053701, now seen corresponding path program 84 times [2022-01-31 19:59:19,285 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:19,285 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1421123497] [2022-01-31 19:59:19,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:19,285 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:19,287 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:19,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:19,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,456 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:19,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 36 [2022-01-31 19:59:19,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:59:19,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:59:19,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:59:19,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:59:19,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:59:19,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:59:19,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:59:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:59:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:59:19,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:59:19,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:59:19,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:59:19,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:59:19,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:59:19,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 19:59:19,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:19,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:19,473 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:19,473 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1421123497] [2022-01-31 19:59:19,473 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1421123497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:19,473 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:19,473 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [30] imperfect sequences [] total 30 [2022-01-31 19:59:19,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063770861] [2022-01-31 19:59:19,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:19,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-01-31 19:59:19,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:19,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-01-31 19:59:19,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=647, Unknown=0, NotChecked=0, Total=870 [2022-01-31 19:59:19,474 INFO L87 Difference]: Start difference. First operand 566 states and 667 transitions. Second operand has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 19:59:20,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:20,579 INFO L93 Difference]: Finished difference Result 607 states and 715 transitions. [2022-01-31 19:59:20,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2022-01-31 19:59:20,583 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 168 [2022-01-31 19:59:20,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:20,585 INFO L225 Difference]: With dead ends: 607 [2022-01-31 19:59:20,585 INFO L226 Difference]: Without dead ends: 527 [2022-01-31 19:59:20,585 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=654, Invalid=2426, Unknown=0, NotChecked=0, Total=3080 [2022-01-31 19:59:20,585 INFO L933 BasicCegarLoop]: 50 mSDtfsCounter, 165 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 726 mSolverCounterSat, 185 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 168 SdHoareTripleChecker+Valid, 92 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 185 IncrementalHoareTripleChecker+Valid, 726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:20,586 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [168 Valid, 92 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [185 Valid, 726 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 19:59:20,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 527 states. [2022-01-31 19:59:21,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 527 to 527. [2022-01-31 19:59:21,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 527 states, 398 states have (on average 1.020100502512563) internal successors, (406), 405 states have internal predecessors, (406), 107 states have call successors, (107), 22 states have call predecessors, (107), 21 states have return successors, (106), 99 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 19:59:21,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 527 states to 527 states and 619 transitions. [2022-01-31 19:59:21,208 INFO L78 Accepts]: Start accepts. Automaton has 527 states and 619 transitions. Word has length 168 [2022-01-31 19:59:21,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:21,208 INFO L470 AbstractCegarLoop]: Abstraction has 527 states and 619 transitions. [2022-01-31 19:59:21,208 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.6666666666666665) internal successors, (80), 29 states have internal predecessors, (80), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 19:59:21,208 INFO L276 IsEmpty]: Start isEmpty. Operand 527 states and 619 transitions. [2022-01-31 19:59:21,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2022-01-31 19:59:21,209 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:21,210 INFO L514 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 14, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:21,210 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2022-01-31 19:59:21,210 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:21,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:21,210 INFO L85 PathProgramCache]: Analyzing trace with hash -1866976727, now seen corresponding path program 85 times [2022-01-31 19:59:21,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:21,210 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [473937185] [2022-01-31 19:59:21,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:21,210 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:21,212 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:21,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,451 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:22,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:22,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:22,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:59:22,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:59:22,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:59:22,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:59:22,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:59:22,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:59:22,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:59:22,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:59:22,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:59:22,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:59:22,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:59:22,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:59:22,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:59:22,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 19:59:22,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:22,477 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:22,477 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:22,477 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [473937185] [2022-01-31 19:59:22,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [473937185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:22,477 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:22,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:59:22,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740757717] [2022-01-31 19:59:22,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:22,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:59:22,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:22,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:59:22,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=1328, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:59:22,478 INFO L87 Difference]: Start difference. First operand 527 states and 619 transitions. Second operand has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:59:27,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:27,096 INFO L93 Difference]: Finished difference Result 566 states and 664 transitions. [2022-01-31 19:59:27,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 19:59:27,096 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) Word has length 166 [2022-01-31 19:59:27,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:27,098 INFO L225 Difference]: With dead ends: 566 [2022-01-31 19:59:27,098 INFO L226 Difference]: Without dead ends: 564 [2022-01-31 19:59:27,098 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1283 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=375, Invalid=7107, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 19:59:27,099 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 151 mSDsluCounter, 156 mSDsCounter, 0 mSdLazyCounter, 7114 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 7301 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 7114 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:27,099 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 241 Invalid, 7301 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 7114 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 19:59:27,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 564 states. [2022-01-31 19:59:27,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 564 to 474. [2022-01-31 19:59:27,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 358 states have (on average 1.0195530726256983) internal successors, (365), 364 states have internal predecessors, (365), 94 states have call successors, (94), 22 states have call predecessors, (94), 21 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 19:59:27,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 552 transitions. [2022-01-31 19:59:27,633 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 552 transitions. Word has length 166 [2022-01-31 19:59:27,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:27,633 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 552 transitions. [2022-01-31 19:59:27,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3783783783783785) internal successors, (88), 36 states have internal predecessors, (88), 16 states have call successors, (19), 3 states have call predecessors, (19), 1 states have return successors, (17), 15 states have call predecessors, (17), 15 states have call successors, (17) [2022-01-31 19:59:27,633 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 552 transitions. [2022-01-31 19:59:27,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2022-01-31 19:59:27,635 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:27,635 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:27,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2022-01-31 19:59:27,635 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:27,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:27,635 INFO L85 PathProgramCache]: Analyzing trace with hash 916474849, now seen corresponding path program 86 times [2022-01-31 19:59:27,635 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:27,635 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1280601393] [2022-01-31 19:59:27,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:27,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:27,638 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:27,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:28,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:28,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:28,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 19:59:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 19:59:28,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 19:59:28,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 19:59:28,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 19:59:28,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 19:59:28,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 19:59:28,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 19:59:28,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 19:59:28,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 19:59:28,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 19:59:28,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 19:59:28,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 19:59:28,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 19:59:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 19:59:28,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:28,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:28,471 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:28,471 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1280601393] [2022-01-31 19:59:28,471 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1280601393] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:28,471 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:28,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:59:28,472 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650363474] [2022-01-31 19:59:28,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:28,472 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:59:28,472 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:28,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:59:28,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:59:28,472 INFO L87 Difference]: Start difference. First operand 474 states and 552 transitions. Second operand has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:32,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:32,411 INFO L93 Difference]: Finished difference Result 494 states and 574 transitions. [2022-01-31 19:59:32,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 19:59:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 168 [2022-01-31 19:59:32,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:32,413 INFO L225 Difference]: With dead ends: 494 [2022-01-31 19:59:32,413 INFO L226 Difference]: Without dead ends: 492 [2022-01-31 19:59:32,414 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1509 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=443, Invalid=7747, Unknown=0, NotChecked=0, Total=8190 [2022-01-31 19:59:32,414 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 112 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 5549 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 5709 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 5549 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:32,414 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 214 Invalid, 5709 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 5549 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 19:59:32,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 492 states. [2022-01-31 19:59:32,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 492 to 419. [2022-01-31 19:59:32,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 317 states have (on average 1.0220820189274449) internal successors, (324), 322 states have internal predecessors, (324), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 19:59:32,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 483 transitions. [2022-01-31 19:59:32,873 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 483 transitions. Word has length 168 [2022-01-31 19:59:32,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:32,873 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 483 transitions. [2022-01-31 19:59:32,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.2972972972972974) internal successors, (85), 36 states have internal predecessors, (85), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:32,873 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 483 transitions. [2022-01-31 19:59:32,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:59:32,874 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:32,874 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:32,874 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2022-01-31 19:59:32,874 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:32,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:32,874 INFO L85 PathProgramCache]: Analyzing trace with hash -651686887, now seen corresponding path program 87 times [2022-01-31 19:59:32,874 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:32,874 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1867105107] [2022-01-31 19:59:32,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:32,875 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:32,877 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:32,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:34,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:34,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:34,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 19:59:34,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:59:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:59:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:59:34,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:59:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:59:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:59:34,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:59:34,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:59:34,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:59:34,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:59:34,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:59:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:59:34,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:59:34,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 19:59:34,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 19:59:34,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:34,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:34,370 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:34,370 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1867105107] [2022-01-31 19:59:34,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1867105107] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:34,370 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:34,370 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 19:59:34,370 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410570104] [2022-01-31 19:59:34,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:34,370 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 19:59:34,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:34,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 19:59:34,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 19:59:34,371 INFO L87 Difference]: Start difference. First operand 419 states and 483 transitions. Second operand has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 19:59:37,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:37,872 INFO L93 Difference]: Finished difference Result 435 states and 500 transitions. [2022-01-31 19:59:37,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 19:59:37,873 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 170 [2022-01-31 19:59:37,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:37,875 INFO L225 Difference]: With dead ends: 435 [2022-01-31 19:59:37,875 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 19:59:37,875 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1039 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=336, Invalid=5826, Unknown=0, NotChecked=0, Total=6162 [2022-01-31 19:59:37,875 INFO L933 BasicCegarLoop]: 53 mSDtfsCounter, 95 mSDsluCounter, 131 mSDsCounter, 0 mSdLazyCounter, 3814 mSolverCounterSat, 118 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 184 SdHoareTripleChecker+Invalid, 3932 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 118 IncrementalHoareTripleChecker+Valid, 3814 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:37,875 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 184 Invalid, 3932 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [118 Valid, 3814 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 19:59:37,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 19:59:38,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 415. [2022-01-31 19:59:38,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 314 states have (on average 1.0222929936305734) internal successors, (321), 319 states have internal predecessors, (321), 79 states have call successors, (79), 22 states have call predecessors, (79), 21 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 19:59:38,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 478 transitions. [2022-01-31 19:59:38,333 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 478 transitions. Word has length 170 [2022-01-31 19:59:38,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:38,333 INFO L470 AbstractCegarLoop]: Abstraction has 415 states and 478 transitions. [2022-01-31 19:59:38,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 2.342857142857143) internal successors, (82), 34 states have internal predecessors, (82), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 19:59:38,333 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 478 transitions. [2022-01-31 19:59:38,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2022-01-31 19:59:38,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:38,334 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:38,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2022-01-31 19:59:38,334 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:38,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:38,334 INFO L85 PathProgramCache]: Analyzing trace with hash 1088841663, now seen corresponding path program 88 times [2022-01-31 19:59:38,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:38,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [436693646] [2022-01-31 19:59:38,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:38,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:38,337 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:38,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:39,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:39,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,497 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 19:59:39,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 19:59:39,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 19:59:39,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 19:59:39,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 19:59:39,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 19:59:39,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 19:59:39,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 19:59:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 19:59:39,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,511 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 19:59:39,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 19:59:39,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,516 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 19:59:39,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 19:59:39,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 19:59:39,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 19:59:39,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:39,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:39,523 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:39,523 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [436693646] [2022-01-31 19:59:39,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [436693646] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:39,523 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:39,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 19:59:39,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425656474] [2022-01-31 19:59:39,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:39,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 19:59:39,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:39,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 19:59:39,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 19:59:39,524 INFO L87 Difference]: Start difference. First operand 415 states and 478 transitions. Second operand has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:43,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:43,766 INFO L93 Difference]: Finished difference Result 441 states and 507 transitions. [2022-01-31 19:59:43,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 19:59:43,766 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 170 [2022-01-31 19:59:43,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:43,767 INFO L225 Difference]: With dead ends: 441 [2022-01-31 19:59:43,767 INFO L226 Difference]: Without dead ends: 439 [2022-01-31 19:59:43,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=432, Invalid=8124, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 19:59:43,768 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 123 mSDsluCounter, 152 mSDsCounter, 0 mSdLazyCounter, 6328 mSolverCounterSat, 159 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 126 SdHoareTripleChecker+Valid, 228 SdHoareTripleChecker+Invalid, 6487 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 159 IncrementalHoareTripleChecker+Valid, 6328 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:43,768 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [126 Valid, 228 Invalid, 6487 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [159 Valid, 6328 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:59:43,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2022-01-31 19:59:44,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 419. [2022-01-31 19:59:44,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 317 states have (on average 1.0220820189274449) internal successors, (324), 322 states have internal predecessors, (324), 80 states have call successors, (80), 22 states have call predecessors, (80), 21 states have return successors, (79), 74 states have call predecessors, (79), 79 states have call successors, (79) [2022-01-31 19:59:44,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 483 transitions. [2022-01-31 19:59:44,247 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 483 transitions. Word has length 170 [2022-01-31 19:59:44,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:44,248 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 483 transitions. [2022-01-31 19:59:44,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.289473684210526) internal successors, (87), 37 states have internal predecessors, (87), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:44,248 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 483 transitions. [2022-01-31 19:59:44,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:59:44,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:44,249 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:44,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2022-01-31 19:59:44,249 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:44,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:44,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1784064119, now seen corresponding path program 89 times [2022-01-31 19:59:44,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:44,249 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1095411939] [2022-01-31 19:59:44,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:44,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:44,257 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:44,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,287 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:45,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:45,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:45,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 19:59:45,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:59:45,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:59:45,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:59:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:59:45,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:59:45,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:59:45,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:59:45,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:59:45,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:59:45,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,301 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:59:45,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:59:45,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:59:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:59:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:59:45,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:59:45,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:45,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:45,309 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:45,309 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1095411939] [2022-01-31 19:59:45,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1095411939] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:45,309 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:45,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 19:59:45,309 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580708409] [2022-01-31 19:59:45,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:45,309 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 19:59:45,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:45,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 19:59:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 19:59:45,310 INFO L87 Difference]: Start difference. First operand 419 states and 483 transitions. Second operand has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 19:59:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:49,664 INFO L93 Difference]: Finished difference Result 435 states and 500 transitions. [2022-01-31 19:59:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-01-31 19:59:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 172 [2022-01-31 19:59:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:49,666 INFO L225 Difference]: With dead ends: 435 [2022-01-31 19:59:49,666 INFO L226 Difference]: Without dead ends: 433 [2022-01-31 19:59:49,667 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1217 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=373, Invalid=6599, Unknown=0, NotChecked=0, Total=6972 [2022-01-31 19:59:49,667 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 90 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 4736 mSolverCounterSat, 122 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 199 SdHoareTripleChecker+Invalid, 4858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 122 IncrementalHoareTripleChecker+Valid, 4736 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:49,667 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [93 Valid, 199 Invalid, 4858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [122 Valid, 4736 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 19:59:49,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2022-01-31 19:59:50,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 411. [2022-01-31 19:59:50,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 411 states, 311 states have (on average 1.022508038585209) internal successors, (318), 316 states have internal predecessors, (318), 78 states have call successors, (78), 22 states have call predecessors, (78), 21 states have return successors, (77), 72 states have call predecessors, (77), 77 states have call successors, (77) [2022-01-31 19:59:50,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 411 states to 411 states and 473 transitions. [2022-01-31 19:59:50,126 INFO L78 Accepts]: Start accepts. Automaton has 411 states and 473 transitions. Word has length 172 [2022-01-31 19:59:50,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:50,126 INFO L470 AbstractCegarLoop]: Abstraction has 411 states and 473 transitions. [2022-01-31 19:59:50,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.3333333333333335) internal successors, (84), 35 states have internal predecessors, (84), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 19:59:50,126 INFO L276 IsEmpty]: Start isEmpty. Operand 411 states and 473 transitions. [2022-01-31 19:59:50,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2022-01-31 19:59:50,127 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:50,127 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:50,128 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2022-01-31 19:59:50,128 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:50,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:50,128 INFO L85 PathProgramCache]: Analyzing trace with hash -770374627, now seen corresponding path program 90 times [2022-01-31 19:59:50,128 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:50,128 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1413037394] [2022-01-31 19:59:50,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:50,128 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:50,130 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:51,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:51,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:51,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 19:59:51,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 19:59:51,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,347 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 19:59:51,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,348 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 19:59:51,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 19:59:51,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 19:59:51,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 19:59:51,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 19:59:51,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 19:59:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 19:59:51,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 19:59:51,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 19:59:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 19:59:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 19:59:51,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 19:59:51,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:51,383 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:51,383 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1413037394] [2022-01-31 19:59:51,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1413037394] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:51,383 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:51,383 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 19:59:51,383 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581002358] [2022-01-31 19:59:51,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:51,383 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 19:59:51,383 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:51,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 19:59:51,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 19:59:51,384 INFO L87 Difference]: Start difference. First operand 411 states and 473 transitions. Second operand has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:55,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 19:59:55,684 INFO L93 Difference]: Finished difference Result 492 states and 571 transitions. [2022-01-31 19:59:55,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 19:59:55,685 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 172 [2022-01-31 19:59:55,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 19:59:55,688 INFO L225 Difference]: With dead ends: 492 [2022-01-31 19:59:55,688 INFO L226 Difference]: Without dead ends: 490 [2022-01-31 19:59:55,689 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1845 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=495, Invalid=9207, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 19:59:55,689 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 136 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 6989 mSolverCounterSat, 190 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 239 SdHoareTripleChecker+Invalid, 7179 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 190 IncrementalHoareTripleChecker+Valid, 6989 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 19:59:55,689 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 239 Invalid, 7179 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [190 Valid, 6989 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 19:59:55,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2022-01-31 19:59:56,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 480. [2022-01-31 19:59:56,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 480 states, 363 states have (on average 1.022038567493113) internal successors, (371), 369 states have internal predecessors, (371), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 19:59:56,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 480 states to 480 states and 558 transitions. [2022-01-31 19:59:56,280 INFO L78 Accepts]: Start accepts. Automaton has 480 states and 558 transitions. Word has length 172 [2022-01-31 19:59:56,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 19:59:56,281 INFO L470 AbstractCegarLoop]: Abstraction has 480 states and 558 transitions. [2022-01-31 19:59:56,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.282051282051282) internal successors, (89), 38 states have internal predecessors, (89), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 19:59:56,281 INFO L276 IsEmpty]: Start isEmpty. Operand 480 states and 558 transitions. [2022-01-31 19:59:56,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 19:59:56,282 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 19:59:56,282 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 19:59:56,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2022-01-31 19:59:56,283 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 19:59:56,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 19:59:56,283 INFO L85 PathProgramCache]: Analyzing trace with hash 1783604565, now seen corresponding path program 91 times [2022-01-31 19:59:56,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 19:59:56,283 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1289300147] [2022-01-31 19:59:56,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 19:59:56,284 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 19:59:56,286 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 19:59:56,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,452 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 19:59:57,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,453 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 19:59:57,453 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,454 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 19:59:57,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,455 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 19:59:57,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,457 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 19:59:57,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 19:59:57,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 19:59:57,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 19:59:57,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 19:59:57,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 19:59:57,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 19:59:57,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 19:59:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 19:59:57,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 19:59:57,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 19:59:57,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 19:59:57,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 19:59:57,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 19:59:57,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 19:59:57,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 19:59:57,478 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 19:59:57,478 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 19:59:57,478 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1289300147] [2022-01-31 19:59:57,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1289300147] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 19:59:57,478 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 19:59:57,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 19:59:57,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952061873] [2022-01-31 19:59:57,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 19:59:57,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 19:59:57,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 19:59:57,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 19:59:57,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 19:59:57,479 INFO L87 Difference]: Start difference. First operand 480 states and 558 transitions. Second operand has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:02,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:02,086 INFO L93 Difference]: Finished difference Result 559 states and 654 transitions. [2022-01-31 20:00:02,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:00:02,086 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 174 [2022-01-31 20:00:02,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:02,088 INFO L225 Difference]: With dead ends: 559 [2022-01-31 20:00:02,088 INFO L226 Difference]: Without dead ends: 557 [2022-01-31 20:00:02,089 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1464 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=430, Invalid=7580, Unknown=0, NotChecked=0, Total=8010 [2022-01-31 20:00:02,089 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 101 mSDsluCounter, 143 mSDsCounter, 0 mSdLazyCounter, 5322 mSolverCounterSat, 147 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5469 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 147 IncrementalHoareTripleChecker+Valid, 5322 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:02,089 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 210 Invalid, 5469 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [147 Valid, 5322 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 20:00:02,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 557 states. [2022-01-31 20:00:02,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 557 to 539. [2022-01-31 20:00:02,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 539 states, 407 states have (on average 1.0196560196560196) internal successors, (415), 414 states have internal predecessors, (415), 109 states have call successors, (109), 23 states have call predecessors, (109), 22 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:00:02,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 539 states to 539 states and 632 transitions. [2022-01-31 20:00:02,766 INFO L78 Accepts]: Start accepts. Automaton has 539 states and 632 transitions. Word has length 174 [2022-01-31 20:00:02,767 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:02,767 INFO L470 AbstractCegarLoop]: Abstraction has 539 states and 632 transitions. [2022-01-31 20:00:02,767 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.324324324324324) internal successors, (86), 36 states have internal predecessors, (86), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:02,767 INFO L276 IsEmpty]: Start isEmpty. Operand 539 states and 632 transitions. [2022-01-31 20:00:02,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2022-01-31 20:00:02,768 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:02,768 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:02,768 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2022-01-31 20:00:02,768 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:02,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:02,768 INFO L85 PathProgramCache]: Analyzing trace with hash -770834181, now seen corresponding path program 92 times [2022-01-31 20:00:02,769 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:02,769 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509984340] [2022-01-31 20:00:02,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:02,769 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:02,771 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:02,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:03,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:00:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:00:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:00:03,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:00:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:00:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:00:03,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:00:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:00:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:00:03,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:00:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:00:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:00:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:00:03,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:00:03,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:00:03,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:03,925 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:03,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509984340] [2022-01-31 20:00:03,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509984340] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:03,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:03,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:00:03,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095408353] [2022-01-31 20:00:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:03,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:00:03,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:03,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:00:03,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=1480, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:00:03,926 INFO L87 Difference]: Start difference. First operand 539 states and 632 transitions. Second operand has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 20:00:09,434 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:09,434 INFO L93 Difference]: Finished difference Result 639 states and 753 transitions. [2022-01-31 20:00:09,434 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:00:09,434 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 174 [2022-01-31 20:00:09,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:09,438 INFO L225 Difference]: With dead ends: 639 [2022-01-31 20:00:09,438 INFO L226 Difference]: Without dead ends: 637 [2022-01-31 20:00:09,439 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1705 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=491, Invalid=9015, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:00:09,439 INFO L933 BasicCegarLoop]: 87 mSDtfsCounter, 146 mSDsluCounter, 160 mSDsCounter, 0 mSdLazyCounter, 7507 mSolverCounterSat, 196 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 149 SdHoareTripleChecker+Valid, 247 SdHoareTripleChecker+Invalid, 7703 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 196 IncrementalHoareTripleChecker+Valid, 7507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:09,439 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [149 Valid, 247 Invalid, 7703 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [196 Valid, 7507 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:00:09,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2022-01-31 20:00:10,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 541. [2022-01-31 20:00:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 541 states, 409 states have (on average 1.02200488997555) internal successors, (418), 416 states have internal predecessors, (418), 109 states have call successors, (109), 23 states have call predecessors, (109), 22 states have return successors, (108), 101 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:00:10,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 541 states to 541 states and 635 transitions. [2022-01-31 20:00:10,142 INFO L78 Accepts]: Start accepts. Automaton has 541 states and 635 transitions. Word has length 174 [2022-01-31 20:00:10,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:10,142 INFO L470 AbstractCegarLoop]: Abstraction has 541 states and 635 transitions. [2022-01-31 20:00:10,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 20:00:10,142 INFO L276 IsEmpty]: Start isEmpty. Operand 541 states and 635 transitions. [2022-01-31 20:00:10,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 20:00:10,143 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:10,144 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:10,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2022-01-31 20:00:10,144 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:10,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:10,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1341973171, now seen corresponding path program 93 times [2022-01-31 20:00:10,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:10,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [558645014] [2022-01-31 20:00:10,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:10,144 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:10,147 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:10,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:11,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:11,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:11,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:00:11,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:00:11,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:00:11,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:00:11,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:00:11,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:00:11,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:00:11,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:00:11,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:00:11,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:00:11,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:00:11,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:00:11,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:00:11,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:00:11,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:00:11,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:00:11,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:11,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:11,153 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:11,153 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [558645014] [2022-01-31 20:00:11,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [558645014] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:11,153 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:11,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:00:11,154 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049832917] [2022-01-31 20:00:11,154 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:11,154 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:00:11,154 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:11,154 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:00:11,154 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:00:11,154 INFO L87 Difference]: Start difference. First operand 541 states and 635 transitions. Second operand has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:15,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:15,596 INFO L93 Difference]: Finished difference Result 565 states and 662 transitions. [2022-01-31 20:00:15,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:00:15,596 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 176 [2022-01-31 20:00:15,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:15,598 INFO L225 Difference]: With dead ends: 565 [2022-01-31 20:00:15,598 INFO L226 Difference]: Without dead ends: 563 [2022-01-31 20:00:15,598 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1623 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=456, Invalid=8286, Unknown=0, NotChecked=0, Total=8742 [2022-01-31 20:00:15,599 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 113 mSDsluCounter, 149 mSDsCounter, 0 mSdLazyCounter, 5901 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 6064 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 5901 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:15,599 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 221 Invalid, 6064 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 5901 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 20:00:15,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 563 states. [2022-01-31 20:00:16,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 563 to 486. [2022-01-31 20:00:16,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 486 states, 368 states have (on average 1.0244565217391304) internal successors, (377), 374 states have internal predecessors, (377), 95 states have call successors, (95), 23 states have call predecessors, (95), 22 states have return successors, (94), 88 states have call predecessors, (94), 94 states have call successors, (94) [2022-01-31 20:00:16,220 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 486 states to 486 states and 566 transitions. [2022-01-31 20:00:16,220 INFO L78 Accepts]: Start accepts. Automaton has 486 states and 566 transitions. Word has length 176 [2022-01-31 20:00:16,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:16,221 INFO L470 AbstractCegarLoop]: Abstraction has 486 states and 566 transitions. [2022-01-31 20:00:16,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3157894736842106) internal successors, (88), 37 states have internal predecessors, (88), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:16,221 INFO L276 IsEmpty]: Start isEmpty. Operand 486 states and 566 transitions. [2022-01-31 20:00:16,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 20:00:16,222 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:16,222 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:16,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2022-01-31 20:00:16,223 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:16,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:16,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1035791083, now seen corresponding path program 94 times [2022-01-31 20:00:16,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:16,223 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1767743877] [2022-01-31 20:00:16,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:16,224 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:16,226 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:16,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:17,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:17,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:17,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 20:00:17,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:00:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:00:17,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:00:17,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:00:17,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:00:17,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:00:17,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:00:17,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:00:17,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:00:17,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:00:17,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:00:17,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:00:17,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:00:17,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:00:17,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:00:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:00:17,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:17,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:17,606 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:17,606 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1767743877] [2022-01-31 20:00:17,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1767743877] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:17,606 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:17,606 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [37] imperfect sequences [] total 37 [2022-01-31 20:00:17,606 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350508635] [2022-01-31 20:00:17,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:17,606 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2022-01-31 20:00:17,606 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:17,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2022-01-31 20:00:17,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1257, Unknown=0, NotChecked=0, Total=1332 [2022-01-31 20:00:17,607 INFO L87 Difference]: Start difference. First operand 486 states and 566 transitions. Second operand has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:00:20,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:20,951 INFO L93 Difference]: Finished difference Result 506 states and 588 transitions. [2022-01-31 20:00:20,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2022-01-31 20:00:20,951 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 178 [2022-01-31 20:00:20,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:20,954 INFO L225 Difference]: With dead ends: 506 [2022-01-31 20:00:20,954 INFO L226 Difference]: Without dead ends: 504 [2022-01-31 20:00:20,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1132 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=364, Invalid=6278, Unknown=0, NotChecked=0, Total=6642 [2022-01-31 20:00:20,954 INFO L933 BasicCegarLoop]: 55 mSDtfsCounter, 95 mSDsluCounter, 134 mSDsCounter, 0 mSdLazyCounter, 4089 mSolverCounterSat, 131 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 189 SdHoareTripleChecker+Invalid, 4220 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 4089 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:20,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 189 Invalid, 4220 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 4089 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2022-01-31 20:00:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 504 states. [2022-01-31 20:00:21,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 504 to 482. [2022-01-31 20:00:21,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 365 states have (on average 1.0246575342465754) internal successors, (374), 371 states have internal predecessors, (374), 94 states have call successors, (94), 23 states have call predecessors, (94), 22 states have return successors, (93), 87 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 20:00:21,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 561 transitions. [2022-01-31 20:00:21,509 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 561 transitions. Word has length 178 [2022-01-31 20:00:21,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:21,509 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 561 transitions. [2022-01-31 20:00:21,509 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 36 states have (on average 2.361111111111111) internal successors, (85), 35 states have internal predecessors, (85), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:00:21,509 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 561 transitions. [2022-01-31 20:00:21,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2022-01-31 20:00:21,510 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:21,510 INFO L514 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:21,510 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2022-01-31 20:00:21,510 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:21,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:21,510 INFO L85 PathProgramCache]: Analyzing trace with hash -1212465575, now seen corresponding path program 95 times [2022-01-31 20:00:21,511 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:21,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2100771004] [2022-01-31 20:00:21,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:21,511 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:21,513 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:21,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,085 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:23,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,087 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:23,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,088 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:23,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,089 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:00:23,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,091 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:00:23,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,092 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:00:23,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,094 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:00:23,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,095 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:00:23,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:00:23,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:00:23,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:00:23,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:00:23,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:00:23,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:00:23,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:00:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:00:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:00:23,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:00:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:23,112 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:23,112 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:23,113 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2100771004] [2022-01-31 20:00:23,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2100771004] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:23,113 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:23,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:00:23,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965361058] [2022-01-31 20:00:23,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:23,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:00:23,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:23,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:00:23,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=1478, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:00:23,114 INFO L87 Difference]: Start difference. First operand 482 states and 561 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 20:00:29,086 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:29,086 INFO L93 Difference]: Finished difference Result 541 states and 630 transitions. [2022-01-31 20:00:29,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-01-31 20:00:29,086 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) Word has length 176 [2022-01-31 20:00:29,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:29,101 INFO L225 Difference]: With dead ends: 541 [2022-01-31 20:00:29,101 INFO L226 Difference]: Without dead ends: 539 [2022-01-31 20:00:29,102 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1439 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=397, Invalid=7975, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:00:29,102 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 161 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7810 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 164 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 8009 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 7810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:29,102 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [164 Valid, 251 Invalid, 8009 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 7810 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:00:29,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2022-01-31 20:00:29,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 427. [2022-01-31 20:00:29,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 427 states, 323 states have (on average 1.021671826625387) internal successors, (330), 328 states have internal predecessors, (330), 81 states have call successors, (81), 23 states have call predecessors, (81), 22 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 20:00:29,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 427 states to 427 states and 491 transitions. [2022-01-31 20:00:29,808 INFO L78 Accepts]: Start accepts. Automaton has 427 states and 491 transitions. Word has length 176 [2022-01-31 20:00:29,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:29,808 INFO L470 AbstractCegarLoop]: Abstraction has 427 states and 491 transitions. [2022-01-31 20:00:29,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 17 states have call successors, (20), 3 states have call predecessors, (20), 1 states have return successors, (18), 16 states have call predecessors, (18), 16 states have call successors, (18) [2022-01-31 20:00:29,808 INFO L276 IsEmpty]: Start isEmpty. Operand 427 states and 491 transitions. [2022-01-31 20:00:29,810 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2022-01-31 20:00:29,810 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:29,810 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:29,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2022-01-31 20:00:29,810 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:29,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:29,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2135965841, now seen corresponding path program 96 times [2022-01-31 20:00:29,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:29,810 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2060308025] [2022-01-31 20:00:29,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:29,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:29,814 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:29,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:30,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:30,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:30,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:00:30,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:00:30,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:00:30,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:00:30,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:00:30,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:00:30,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:00:30,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,803 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:00:30,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,804 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:00:30,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,805 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:00:30,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,807 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:00:30,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,808 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:00:30,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,810 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:00:30,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,814 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:00:30,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,817 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:00:30,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,818 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:00:30,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:30,822 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:30,822 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:30,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2060308025] [2022-01-31 20:00:30,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2060308025] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:30,822 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:30,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:00:30,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574463761] [2022-01-31 20:00:30,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:30,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:00:30,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:30,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:00:30,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:00:30,823 INFO L87 Difference]: Start difference. First operand 427 states and 491 transitions. Second operand has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:35,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:35,766 INFO L93 Difference]: Finished difference Result 457 states and 525 transitions. [2022-01-31 20:00:35,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:00:35,766 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 178 [2022-01-31 20:00:35,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:35,768 INFO L225 Difference]: With dead ends: 457 [2022-01-31 20:00:35,768 INFO L226 Difference]: Without dead ends: 455 [2022-01-31 20:00:35,769 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1734 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=475, Invalid=8837, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:00:35,769 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 121 mSDsluCounter, 151 mSDsCounter, 0 mSdLazyCounter, 6402 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 227 SdHoareTripleChecker+Invalid, 6575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:35,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 227 Invalid, 6575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6402 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:00:35,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 455 states. [2022-01-31 20:00:36,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 455 to 431. [2022-01-31 20:00:36,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 431 states, 326 states have (on average 1.021472392638037) internal successors, (333), 331 states have internal predecessors, (333), 82 states have call successors, (82), 23 states have call predecessors, (82), 22 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 20:00:36,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 431 states to 431 states and 496 transitions. [2022-01-31 20:00:36,310 INFO L78 Accepts]: Start accepts. Automaton has 431 states and 496 transitions. Word has length 178 [2022-01-31 20:00:36,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:36,311 INFO L470 AbstractCegarLoop]: Abstraction has 431 states and 496 transitions. [2022-01-31 20:00:36,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3076923076923075) internal successors, (90), 38 states have internal predecessors, (90), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:36,311 INFO L276 IsEmpty]: Start isEmpty. Operand 431 states and 496 transitions. [2022-01-31 20:00:36,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 20:00:36,312 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:36,313 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:36,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2022-01-31 20:00:36,313 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:36,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:36,314 INFO L85 PathProgramCache]: Analyzing trace with hash -441431735, now seen corresponding path program 97 times [2022-01-31 20:00:36,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:36,314 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1814952043] [2022-01-31 20:00:36,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:36,320 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:36,323 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:36,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:37,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:37,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:37,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:00:37,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,364 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:00:37,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:00:37,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:00:37,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:00:37,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:00:37,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:00:37,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,372 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:00:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:00:37,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:00:37,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:00:37,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:00:37,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:00:37,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:00:37,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:00:37,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:00:37,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:00:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:37,388 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:37,388 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:37,388 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1814952043] [2022-01-31 20:00:37,388 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1814952043] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:37,388 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:37,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [38] imperfect sequences [] total 38 [2022-01-31 20:00:37,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926380] [2022-01-31 20:00:37,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:37,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2022-01-31 20:00:37,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:37,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2022-01-31 20:00:37,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1329, Unknown=0, NotChecked=0, Total=1406 [2022-01-31 20:00:37,389 INFO L87 Difference]: Start difference. First operand 431 states and 496 transitions. Second operand has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:00:41,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:41,590 INFO L93 Difference]: Finished difference Result 447 states and 513 transitions. [2022-01-31 20:00:41,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-01-31 20:00:41,591 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 180 [2022-01-31 20:00:41,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:41,592 INFO L225 Difference]: With dead ends: 447 [2022-01-31 20:00:41,592 INFO L226 Difference]: Without dead ends: 445 [2022-01-31 20:00:41,593 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1367 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=410, Invalid=7246, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:00:41,593 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 88 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5096 mSolverCounterSat, 132 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 91 SdHoareTripleChecker+Valid, 210 SdHoareTripleChecker+Invalid, 5228 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 132 IncrementalHoareTripleChecker+Valid, 5096 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:41,593 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [91 Valid, 210 Invalid, 5228 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [132 Valid, 5096 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 20:00:41,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 445 states. [2022-01-31 20:00:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 445 to 419. [2022-01-31 20:00:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 419 states, 317 states have (on average 1.0220820189274449) internal successors, (324), 322 states have internal predecessors, (324), 79 states have call successors, (79), 23 states have call predecessors, (79), 22 states have return successors, (78), 73 states have call predecessors, (78), 78 states have call successors, (78) [2022-01-31 20:00:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 419 states to 419 states and 481 transitions. [2022-01-31 20:00:42,110 INFO L78 Accepts]: Start accepts. Automaton has 419 states and 481 transitions. Word has length 180 [2022-01-31 20:00:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:42,110 INFO L470 AbstractCegarLoop]: Abstraction has 419 states and 481 transitions. [2022-01-31 20:00:42,110 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 37 states have (on average 2.3513513513513513) internal successors, (87), 36 states have internal predecessors, (87), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:00:42,110 INFO L276 IsEmpty]: Start isEmpty. Operand 419 states and 481 transitions. [2022-01-31 20:00:42,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2022-01-31 20:00:42,111 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:42,111 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:42,112 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2022-01-31 20:00:42,112 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:42,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:42,112 INFO L85 PathProgramCache]: Analyzing trace with hash 658743023, now seen corresponding path program 98 times [2022-01-31 20:00:42,112 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:42,112 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1567585468] [2022-01-31 20:00:42,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:42,113 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:42,115 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:42,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:43,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:43,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:43,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:00:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,792 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:00:43,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,794 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:00:43,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,796 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:00:43,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,797 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:00:43,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,798 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:00:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,800 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:00:43,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,801 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:00:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,827 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:00:43,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,829 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:00:43,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,830 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:00:43,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,832 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:00:43,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,833 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:00:43,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,835 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:00:43,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,836 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:00:43,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,838 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:00:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:43,840 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:43,840 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:43,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1567585468] [2022-01-31 20:00:43,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1567585468] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:43,841 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:43,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:00:43,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003302944] [2022-01-31 20:00:43,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:43,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:00:43,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:43,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:00:43,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:00:43,842 INFO L87 Difference]: Start difference. First operand 419 states and 481 transitions. Second operand has 41 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:49,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:49,981 INFO L93 Difference]: Finished difference Result 502 states and 582 transitions. [2022-01-31 20:00:49,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:00:49,981 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 180 [2022-01-31 20:00:49,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:49,982 INFO L225 Difference]: With dead ends: 502 [2022-01-31 20:00:49,982 INFO L226 Difference]: Without dead ends: 500 [2022-01-31 20:00:49,983 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1791 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=462, Invalid=9240, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:00:49,983 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 133 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 7276 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 136 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 7449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 7276 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:49,983 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [136 Valid, 242 Invalid, 7449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 7276 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:00:49,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 500 states. [2022-01-31 20:00:50,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 500 to 492. [2022-01-31 20:00:50,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 492 states, 372 states have (on average 1.021505376344086) internal successors, (380), 378 states have internal predecessors, (380), 96 states have call successors, (96), 24 states have call predecessors, (96), 23 states have return successors, (95), 89 states have call predecessors, (95), 95 states have call successors, (95) [2022-01-31 20:00:50,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 492 states to 492 states and 571 transitions. [2022-01-31 20:00:50,656 INFO L78 Accepts]: Start accepts. Automaton has 492 states and 571 transitions. Word has length 180 [2022-01-31 20:00:50,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:50,656 INFO L470 AbstractCegarLoop]: Abstraction has 492 states and 571 transitions. [2022-01-31 20:00:50,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.3) internal successors, (92), 39 states have internal predecessors, (92), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:00:50,657 INFO L276 IsEmpty]: Start isEmpty. Operand 492 states and 571 transitions. [2022-01-31 20:00:50,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 20:00:50,658 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:50,658 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:50,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2022-01-31 20:00:50,658 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:50,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:50,658 INFO L85 PathProgramCache]: Analyzing trace with hash 1581615143, now seen corresponding path program 99 times [2022-01-31 20:00:50,658 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:50,659 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1513339471] [2022-01-31 20:00:50,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:50,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:50,662 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:50,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:51,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:51,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:51,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:00:51,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:00:51,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:00:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:00:51,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:00:51,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:00:51,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:00:51,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:00:51,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:00:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:00:51,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:51,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:00:51,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:00:52,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:00:52,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:00:52,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:00:52,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:00:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:00:52,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:52,010 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:52,010 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:52,010 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1513339471] [2022-01-31 20:00:52,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1513339471] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:52,010 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:52,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:00:52,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521378784] [2022-01-31 20:00:52,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:52,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:00:52,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:52,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:00:52,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:00:52,011 INFO L87 Difference]: Start difference. First operand 492 states and 571 transitions. Second operand has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:00:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:00:56,515 INFO L93 Difference]: Finished difference Result 575 states and 672 transitions. [2022-01-31 20:00:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:00:56,516 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 182 [2022-01-31 20:00:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:00:56,517 INFO L225 Difference]: With dead ends: 575 [2022-01-31 20:00:56,517 INFO L226 Difference]: Without dead ends: 573 [2022-01-31 20:00:56,518 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1523 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=436, Invalid=7936, Unknown=0, NotChecked=0, Total=8372 [2022-01-31 20:00:56,518 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 99 mSDsluCounter, 150 mSDsCounter, 0 mSdLazyCounter, 5580 mSolverCounterSat, 146 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 102 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 5726 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 146 IncrementalHoareTripleChecker+Valid, 5580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:00:56,518 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [102 Valid, 217 Invalid, 5726 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [146 Valid, 5580 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 20:00:56,519 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2022-01-31 20:00:57,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 551. [2022-01-31 20:00:57,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 551 states, 416 states have (on average 1.0192307692307692) internal successors, (424), 423 states have internal predecessors, (424), 111 states have call successors, (111), 24 states have call predecessors, (111), 23 states have return successors, (110), 103 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:00:57,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 551 states to 551 states and 645 transitions. [2022-01-31 20:00:57,248 INFO L78 Accepts]: Start accepts. Automaton has 551 states and 645 transitions. Word has length 182 [2022-01-31 20:00:57,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:00:57,248 INFO L470 AbstractCegarLoop]: Abstraction has 551 states and 645 transitions. [2022-01-31 20:00:57,248 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3421052631578947) internal successors, (89), 37 states have internal predecessors, (89), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:00:57,248 INFO L276 IsEmpty]: Start isEmpty. Operand 551 states and 645 transitions. [2022-01-31 20:00:57,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2022-01-31 20:00:57,249 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:00:57,249 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:00:57,250 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2022-01-31 20:00:57,250 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:00:57,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:00:57,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1613177395, now seen corresponding path program 100 times [2022-01-31 20:00:57,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:00:57,250 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [197110193] [2022-01-31 20:00:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:00:57,250 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:00:57,253 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:00:57,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:00:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:00:58,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:00:58,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:00:58,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:00:58,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:00:58,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:00:58,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:00:58,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:00:58,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:00:58,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:00:58,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:00:58,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:00:58,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:00:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:00:58,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:00:58,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:00:58,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:00:58,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:00:58,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:00:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:00:58,933 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:00:58,933 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [197110193] [2022-01-31 20:00:58,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [197110193] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:00:58,934 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:00:58,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:00:58,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416311619] [2022-01-31 20:00:58,934 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:00:58,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:00:58,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:00:58,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:00:58,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:00:58,934 INFO L87 Difference]: Start difference. First operand 551 states and 645 transitions. Second operand has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:01:06,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:06,577 INFO L93 Difference]: Finished difference Result 643 states and 756 transitions. [2022-01-31 20:01:06,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:01:06,577 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 182 [2022-01-31 20:01:06,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:06,590 INFO L225 Difference]: With dead ends: 643 [2022-01-31 20:01:06,590 INFO L226 Difference]: Without dead ends: 641 [2022-01-31 20:01:06,591 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1970 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=485, Invalid=10021, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:01:06,591 INFO L933 BasicCegarLoop]: 86 mSDtfsCounter, 145 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7985 mSolverCounterSat, 187 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 253 SdHoareTripleChecker+Invalid, 8172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 187 IncrementalHoareTripleChecker+Valid, 7985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:06,591 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 253 Invalid, 8172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [187 Valid, 7985 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 20:01:06,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-31 20:01:07,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 553. [2022-01-31 20:01:07,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 553 states, 418 states have (on average 1.0215311004784688) internal successors, (427), 425 states have internal predecessors, (427), 111 states have call successors, (111), 24 states have call predecessors, (111), 23 states have return successors, (110), 103 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:01:07,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 553 states to 553 states and 648 transitions. [2022-01-31 20:01:07,306 INFO L78 Accepts]: Start accepts. Automaton has 553 states and 648 transitions. Word has length 182 [2022-01-31 20:01:07,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:07,306 INFO L470 AbstractCegarLoop]: Abstraction has 553 states and 648 transitions. [2022-01-31 20:01:07,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.292682926829268) internal successors, (94), 40 states have internal predecessors, (94), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:01:07,307 INFO L276 IsEmpty]: Start isEmpty. Operand 553 states and 648 transitions. [2022-01-31 20:01:07,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 20:01:07,313 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:07,313 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:07,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2022-01-31 20:01:07,313 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:07,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:07,313 INFO L85 PathProgramCache]: Analyzing trace with hash 109479813, now seen corresponding path program 101 times [2022-01-31 20:01:07,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:07,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [253032714] [2022-01-31 20:01:07,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:07,313 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:07,316 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:07,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:08,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:08,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:08,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:01:08,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:01:08,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:01:08,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,666 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:01:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,667 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:01:08,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,668 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:01:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,670 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:01:08,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,671 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:01:08,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,672 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:01:08,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,674 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:01:08,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,675 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:01:08,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,677 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:01:08,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,678 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:01:08,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,679 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:01:08,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,681 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:01:08,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,682 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:01:08,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,684 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:01:08,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:08,686 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:08,686 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:08,686 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [253032714] [2022-01-31 20:01:08,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [253032714] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:08,686 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:08,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:01:08,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18802341] [2022-01-31 20:01:08,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:08,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:01:08,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:08,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:01:08,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:01:08,688 INFO L87 Difference]: Start difference. First operand 553 states and 648 transitions. Second operand has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:01:14,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:14,070 INFO L93 Difference]: Finished difference Result 581 states and 680 transitions. [2022-01-31 20:01:14,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:01:14,070 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 184 [2022-01-31 20:01:14,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:14,072 INFO L225 Difference]: With dead ends: 581 [2022-01-31 20:01:14,072 INFO L226 Difference]: Without dead ends: 579 [2022-01-31 20:01:14,072 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1685 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=462, Invalid=8658, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:01:14,073 INFO L933 BasicCegarLoop]: 72 mSDtfsCounter, 111 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5906 mSolverCounterSat, 162 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 220 SdHoareTripleChecker+Invalid, 6068 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 162 IncrementalHoareTripleChecker+Valid, 5906 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:14,073 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [114 Valid, 220 Invalid, 6068 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [162 Valid, 5906 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 20:01:14,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2022-01-31 20:01:14,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 498. [2022-01-31 20:01:14,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 498 states, 377 states have (on average 1.023872679045093) internal successors, (386), 383 states have internal predecessors, (386), 97 states have call successors, (97), 24 states have call predecessors, (97), 23 states have return successors, (96), 90 states have call predecessors, (96), 96 states have call successors, (96) [2022-01-31 20:01:14,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 498 states to 498 states and 579 transitions. [2022-01-31 20:01:14,748 INFO L78 Accepts]: Start accepts. Automaton has 498 states and 579 transitions. Word has length 184 [2022-01-31 20:01:14,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:14,748 INFO L470 AbstractCegarLoop]: Abstraction has 498 states and 579 transitions. [2022-01-31 20:01:14,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3333333333333335) internal successors, (91), 38 states have internal predecessors, (91), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:01:14,748 INFO L276 IsEmpty]: Start isEmpty. Operand 498 states and 579 transitions. [2022-01-31 20:01:14,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 20:01:14,749 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:14,749 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 9, 9, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:14,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2022-01-31 20:01:14,749 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:14,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:14,749 INFO L85 PathProgramCache]: Analyzing trace with hash -961095747, now seen corresponding path program 102 times [2022-01-31 20:01:14,749 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:14,750 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [328478149] [2022-01-31 20:01:14,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:14,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:14,753 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:14,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:14,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:14,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:14,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 38 [2022-01-31 20:01:14,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:01:14,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:01:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,994 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:01:14,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:01:14,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,996 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:01:14,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:01:14,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:14,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:01:14,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:01:15,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:01:15,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,002 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:01:15,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:01:15,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:01:15,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:01:15,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,007 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:01:15,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,008 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:01:15,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,024 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:01:15,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:01:15,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:15,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:15,027 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:15,027 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [328478149] [2022-01-31 20:01:15,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [328478149] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:15,027 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:15,027 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [33] imperfect sequences [] total 33 [2022-01-31 20:01:15,027 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10460600] [2022-01-31 20:01:15,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:15,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-01-31 20:01:15,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:15,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-01-31 20:01:15,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=784, Unknown=0, NotChecked=0, Total=1056 [2022-01-31 20:01:15,033 INFO L87 Difference]: Start difference. First operand 498 states and 579 transitions. Second operand has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:01:16,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:16,340 INFO L93 Difference]: Finished difference Result 519 states and 602 transitions. [2022-01-31 20:01:16,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-01-31 20:01:16,340 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 186 [2022-01-31 20:01:16,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:16,341 INFO L225 Difference]: With dead ends: 519 [2022-01-31 20:01:16,341 INFO L226 Difference]: Without dead ends: 435 [2022-01-31 20:01:16,342 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 945 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=796, Invalid=2986, Unknown=0, NotChecked=0, Total=3782 [2022-01-31 20:01:16,342 INFO L933 BasicCegarLoop]: 54 mSDtfsCounter, 189 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 756 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 86 SdHoareTripleChecker+Invalid, 969 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 756 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:16,342 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [192 Valid, 86 Invalid, 969 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 756 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:01:16,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 435 states. [2022-01-31 20:01:16,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 435 to 435. [2022-01-31 20:01:16,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 435 states, 330 states have (on average 1.0242424242424242) internal successors, (338), 335 states have internal predecessors, (338), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 20:01:16,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 435 states to 435 states and 499 transitions. [2022-01-31 20:01:16,870 INFO L78 Accepts]: Start accepts. Automaton has 435 states and 499 transitions. Word has length 186 [2022-01-31 20:01:16,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:16,870 INFO L470 AbstractCegarLoop]: Abstraction has 435 states and 499 transitions. [2022-01-31 20:01:16,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.6666666666666665) internal successors, (88), 32 states have internal predecessors, (88), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:01:16,870 INFO L276 IsEmpty]: Start isEmpty. Operand 435 states and 499 transitions. [2022-01-31 20:01:16,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2022-01-31 20:01:16,871 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:16,871 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:16,871 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2022-01-31 20:01:16,871 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:16,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:16,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1209654571, now seen corresponding path program 103 times [2022-01-31 20:01:16,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:16,871 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1240318667] [2022-01-31 20:01:16,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:16,871 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:16,874 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:16,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:18,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:01:18,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:01:18,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:01:18,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:01:18,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:01:18,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:01:18,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:01:18,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:01:18,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:01:18,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:01:18,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:01:18,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:01:18,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:01:18,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:01:18,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:01:18,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:01:18,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:18,149 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:18,149 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:18,149 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1240318667] [2022-01-31 20:01:18,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1240318667] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:18,150 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:18,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:01:18,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449834883] [2022-01-31 20:01:18,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:18,150 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:01:18,150 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:18,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:01:18,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=1638, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:01:18,151 INFO L87 Difference]: Start difference. First operand 435 states and 499 transitions. Second operand has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:01:23,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:23,710 INFO L93 Difference]: Finished difference Result 549 states and 637 transitions. [2022-01-31 20:01:23,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:01:23,710 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 184 [2022-01-31 20:01:23,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:23,712 INFO L225 Difference]: With dead ends: 549 [2022-01-31 20:01:23,712 INFO L226 Difference]: Without dead ends: 547 [2022-01-31 20:01:23,712 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1885 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=516, Invalid=9990, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:01:23,712 INFO L933 BasicCegarLoop]: 91 mSDtfsCounter, 152 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 8390 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 8597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 8390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:23,713 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [155 Valid, 260 Invalid, 8597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 8390 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:01:23,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 547 states. [2022-01-31 20:01:24,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 547 to 437. [2022-01-31 20:01:24,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 332 states have (on average 1.0271084337349397) internal successors, (341), 337 states have internal predecessors, (341), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 20:01:24,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 502 transitions. [2022-01-31 20:01:24,289 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 502 transitions. Word has length 184 [2022-01-31 20:01:24,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:24,289 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 502 transitions. [2022-01-31 20:01:24,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:01:24,289 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 502 transitions. [2022-01-31 20:01:24,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 20:01:24,290 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:24,290 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:24,290 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2022-01-31 20:01:24,290 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:24,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1568331933, now seen corresponding path program 104 times [2022-01-31 20:01:24,291 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:24,291 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1756140224] [2022-01-31 20:01:24,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:24,291 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:24,294 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:24,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:25,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:25,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:25,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:01:25,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:01:25,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:01:25,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:01:25,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,605 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:01:25,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:01:25,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,608 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:01:25,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,609 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:01:25,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:01:25,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:01:25,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:01:25,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:01:25,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:01:25,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:01:25,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:01:25,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:01:25,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:01:25,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:25,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:25,621 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:25,621 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1756140224] [2022-01-31 20:01:25,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1756140224] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:25,621 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:25,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:01:25,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936535877] [2022-01-31 20:01:25,621 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:25,621 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:01:25,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:01:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:01:25,633 INFO L87 Difference]: Start difference. First operand 437 states and 502 transitions. Second operand has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:01:31,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:31,261 INFO L93 Difference]: Finished difference Result 470 states and 540 transitions. [2022-01-31 20:01:31,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:01:31,262 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 186 [2022-01-31 20:01:31,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:31,263 INFO L225 Difference]: With dead ends: 470 [2022-01-31 20:01:31,263 INFO L226 Difference]: Without dead ends: 468 [2022-01-31 20:01:31,264 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1798 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=481, Invalid=9221, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:01:31,264 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 119 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6903 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 7076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6903 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:31,264 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 238 Invalid, 7076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6903 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:01:31,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2022-01-31 20:01:31,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 441. [2022-01-31 20:01:31,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 441 states, 335 states have (on average 1.026865671641791) internal successors, (344), 340 states have internal predecessors, (344), 82 states have call successors, (82), 24 states have call predecessors, (82), 23 states have return successors, (81), 76 states have call predecessors, (81), 81 states have call successors, (81) [2022-01-31 20:01:31,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 441 states to 441 states and 507 transitions. [2022-01-31 20:01:31,903 INFO L78 Accepts]: Start accepts. Automaton has 441 states and 507 transitions. Word has length 186 [2022-01-31 20:01:31,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:31,903 INFO L470 AbstractCegarLoop]: Abstraction has 441 states and 507 transitions. [2022-01-31 20:01:31,904 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.325) internal successors, (93), 39 states have internal predecessors, (93), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:01:31,904 INFO L276 IsEmpty]: Start isEmpty. Operand 441 states and 507 transitions. [2022-01-31 20:01:31,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 20:01:31,904 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:31,905 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:31,905 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2022-01-31 20:01:31,905 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:31,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1569519643, now seen corresponding path program 105 times [2022-01-31 20:01:31,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:31,905 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [984135417] [2022-01-31 20:01:31,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:31,905 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:31,909 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:31,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:33,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:33,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:33,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:01:33,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:01:33,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:01:33,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:01:33,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:01:33,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:01:33,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:01:33,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:01:33,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:01:33,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:01:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,590 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:01:33,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:01:33,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:01:33,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:01:33,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:01:33,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:01:33,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:01:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:01:33,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:33,602 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:33,603 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:33,603 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [984135417] [2022-01-31 20:01:33,603 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [984135417] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:33,603 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:33,603 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:01:33,603 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855007957] [2022-01-31 20:01:33,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:33,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:01:33,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:33,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:01:33,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=1403, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:01:33,604 INFO L87 Difference]: Start difference. First operand 441 states and 507 transitions. Second operand has 39 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:01:37,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:37,991 INFO L93 Difference]: Finished difference Result 469 states and 539 transitions. [2022-01-31 20:01:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2022-01-31 20:01:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 188 [2022-01-31 20:01:37,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:37,993 INFO L225 Difference]: With dead ends: 469 [2022-01-31 20:01:37,993 INFO L226 Difference]: Without dead ends: 467 [2022-01-31 20:01:37,993 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1279 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=389, Invalid=7093, Unknown=0, NotChecked=0, Total=7482 [2022-01-31 20:01:37,994 INFO L933 BasicCegarLoop]: 57 mSDtfsCounter, 101 mSDsluCounter, 139 mSDsCounter, 0 mSdLazyCounter, 4448 mSolverCounterSat, 140 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 4588 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 140 IncrementalHoareTripleChecker+Valid, 4448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:37,994 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 196 Invalid, 4588 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [140 Valid, 4448 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2022-01-31 20:01:37,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 467 states. [2022-01-31 20:01:38,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 467 to 437. [2022-01-31 20:01:38,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 437 states, 332 states have (on average 1.0271084337349397) internal successors, (341), 337 states have internal predecessors, (341), 81 states have call successors, (81), 24 states have call predecessors, (81), 23 states have return successors, (80), 75 states have call predecessors, (80), 80 states have call successors, (80) [2022-01-31 20:01:38,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 437 states to 437 states and 502 transitions. [2022-01-31 20:01:38,541 INFO L78 Accepts]: Start accepts. Automaton has 437 states and 502 transitions. Word has length 188 [2022-01-31 20:01:38,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:38,541 INFO L470 AbstractCegarLoop]: Abstraction has 437 states and 502 transitions. [2022-01-31 20:01:38,541 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 38 states have (on average 2.3684210526315788) internal successors, (90), 37 states have internal predecessors, (90), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:01:38,541 INFO L276 IsEmpty]: Start isEmpty. Operand 437 states and 502 transitions. [2022-01-31 20:01:38,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2022-01-31 20:01:38,542 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:38,542 INFO L514 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 16, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:38,542 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2022-01-31 20:01:38,542 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:38,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:38,542 INFO L85 PathProgramCache]: Analyzing trace with hash -468157175, now seen corresponding path program 106 times [2022-01-31 20:01:38,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:38,542 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1832464914] [2022-01-31 20:01:38,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:38,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:38,546 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:38,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:01:39,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:01:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:01:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:01:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:01:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:01:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:01:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:01:39,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:01:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:01:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:01:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:01:39,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:01:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:01:39,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:01:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:01:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:39,625 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:39,625 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1832464914] [2022-01-31 20:01:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1832464914] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:39,625 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:39,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:01:39,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102196476] [2022-01-31 20:01:39,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:39,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:01:39,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:39,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:01:39,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:01:39,626 INFO L87 Difference]: Start difference. First operand 437 states and 502 transitions. Second operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:01:44,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:44,142 INFO L93 Difference]: Finished difference Result 493 states and 567 transitions. [2022-01-31 20:01:44,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:01:44,195 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) Word has length 186 [2022-01-31 20:01:44,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:44,197 INFO L225 Difference]: With dead ends: 493 [2022-01-31 20:01:44,197 INFO L226 Difference]: Without dead ends: 491 [2022-01-31 20:01:44,198 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1660 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=425, Invalid=9081, Unknown=0, NotChecked=0, Total=9506 [2022-01-31 20:01:44,198 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 166 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8768 mSolverCounterSat, 210 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 169 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 8978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 210 IncrementalHoareTripleChecker+Valid, 8768 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:44,198 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [169 Valid, 265 Invalid, 8978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [210 Valid, 8768 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 20:01:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2022-01-31 20:01:44,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 368. [2022-01-31 20:01:44,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 279 states have (on average 1.021505376344086) internal successors, (285), 283 states have internal predecessors, (285), 65 states have call successors, (65), 24 states have call predecessors, (65), 23 states have return successors, (64), 60 states have call predecessors, (64), 64 states have call successors, (64) [2022-01-31 20:01:44,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 414 transitions. [2022-01-31 20:01:44,701 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 414 transitions. Word has length 186 [2022-01-31 20:01:44,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:44,702 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 414 transitions. [2022-01-31 20:01:44,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 18 states have call successors, (21), 3 states have call predecessors, (21), 1 states have return successors, (19), 17 states have call predecessors, (19), 17 states have call successors, (19) [2022-01-31 20:01:44,702 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 414 transitions. [2022-01-31 20:01:44,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2022-01-31 20:01:44,703 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:44,703 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:44,703 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2022-01-31 20:01:44,703 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:44,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:44,703 INFO L85 PathProgramCache]: Analyzing trace with hash 962283457, now seen corresponding path program 107 times [2022-01-31 20:01:44,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:44,703 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1653620278] [2022-01-31 20:01:44,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:44,704 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:44,707 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:44,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:46,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:46,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,193 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:01:46,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:01:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:01:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:01:46,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:01:46,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:01:46,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:01:46,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:01:46,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:01:46,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:01:46,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:01:46,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:01:46,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:01:46,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:01:46,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:01:46,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:01:46,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:01:46,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:46,254 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:46,254 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:46,254 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1653620278] [2022-01-31 20:01:46,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1653620278] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:46,255 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:46,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:01:46,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884054] [2022-01-31 20:01:46,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:46,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:01:46,255 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:46,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:01:46,255 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1635, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:01:46,256 INFO L87 Difference]: Start difference. First operand 368 states and 414 transitions. Second operand has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:01:51,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:51,590 INFO L93 Difference]: Finished difference Result 455 states and 520 transitions. [2022-01-31 20:01:51,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:01:51,590 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 188 [2022-01-31 20:01:51,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:51,591 INFO L225 Difference]: With dead ends: 455 [2022-01-31 20:01:51,591 INFO L226 Difference]: Without dead ends: 453 [2022-01-31 20:01:51,592 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1628 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=460, Invalid=8852, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:01:51,592 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 132 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 7366 mSolverCounterSat, 182 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 7548 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 182 IncrementalHoareTripleChecker+Valid, 7366 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:51,592 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 245 Invalid, 7548 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [182 Valid, 7366 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:01:51,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2022-01-31 20:01:52,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 445. [2022-01-31 20:01:52,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 337 states have (on average 1.0207715133531157) internal successors, (344), 342 states have internal predecessors, (344), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 20:01:52,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 509 transitions. [2022-01-31 20:01:52,222 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 509 transitions. Word has length 188 [2022-01-31 20:01:52,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:52,222 INFO L470 AbstractCegarLoop]: Abstraction has 445 states and 509 transitions. [2022-01-31 20:01:52,223 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.317073170731707) internal successors, (95), 40 states have internal predecessors, (95), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:01:52,223 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 509 transitions. [2022-01-31 20:01:52,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 20:01:52,224 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:52,224 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:52,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2022-01-31 20:01:52,224 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:52,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:52,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1755547399, now seen corresponding path program 108 times [2022-01-31 20:01:52,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:52,225 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [814471319] [2022-01-31 20:01:52,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:52,225 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:52,228 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:52,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:53,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:53,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:53,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:01:53,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:01:53,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,355 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:01:53,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:01:53,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:01:53,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:01:53,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:01:53,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:01:53,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:01:53,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:01:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:01:53,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,365 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:01:53,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,366 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:01:53,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,367 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:01:53,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,368 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:01:53,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,369 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:01:53,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,370 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:01:53,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,371 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:01:53,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:53,373 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:53,373 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:53,373 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [814471319] [2022-01-31 20:01:53,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [814471319] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:53,373 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:53,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:01:53,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395403284] [2022-01-31 20:01:53,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:53,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:01:53,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:53,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:01:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:01:53,374 INFO L87 Difference]: Start difference. First operand 445 states and 509 transitions. Second operand has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:01:58,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:01:58,160 INFO L93 Difference]: Finished difference Result 532 states and 615 transitions. [2022-01-31 20:01:58,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:01:58,160 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 190 [2022-01-31 20:01:58,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:01:58,161 INFO L225 Difference]: With dead ends: 532 [2022-01-31 20:01:58,161 INFO L226 Difference]: Without dead ends: 530 [2022-01-31 20:01:58,162 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1528 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=435, Invalid=8121, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:01:58,162 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 94 mSDsluCounter, 153 mSDsCounter, 0 mSdLazyCounter, 5744 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 97 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 5887 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5744 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:01:58,162 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [97 Valid, 219 Invalid, 5887 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5744 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 20:01:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 530 states. [2022-01-31 20:01:58,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 530 to 504. [2022-01-31 20:01:58,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 504 states, 381 states have (on average 1.0183727034120735) internal successors, (388), 387 states have internal predecessors, (388), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 20:01:58,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 504 states to 504 states and 583 transitions. [2022-01-31 20:01:58,859 INFO L78 Accepts]: Start accepts. Automaton has 504 states and 583 transitions. Word has length 190 [2022-01-31 20:01:58,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:01:58,859 INFO L470 AbstractCegarLoop]: Abstraction has 504 states and 583 transitions. [2022-01-31 20:01:58,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.358974358974359) internal successors, (92), 38 states have internal predecessors, (92), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:01:58,860 INFO L276 IsEmpty]: Start isEmpty. Operand 504 states and 583 transitions. [2022-01-31 20:01:58,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2022-01-31 20:01:58,860 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:01:58,861 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:01:58,861 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2022-01-31 20:01:58,861 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:01:58,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:01:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1932183711, now seen corresponding path program 109 times [2022-01-31 20:01:58,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:01:58,861 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1147105461] [2022-01-31 20:01:58,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:01:58,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:01:58,864 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:01:58,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:01:59,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:01:59,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:01:59,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:01:59,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:01:59,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:01:59,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:01:59,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,964 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:01:59,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,965 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:01:59,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,966 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:01:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,967 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:01:59,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,968 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:01:59,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,969 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:01:59,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,970 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:01:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,971 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:01:59,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:01:59,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,974 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:01:59,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,975 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:01:59,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,976 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:01:59,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,979 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:01:59,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:01:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:01:59,981 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:01:59,981 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1147105461] [2022-01-31 20:01:59,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1147105461] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:01:59,981 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:01:59,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:01:59,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281591079] [2022-01-31 20:01:59,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:01:59,981 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:01:59,981 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:01:59,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:01:59,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:01:59,982 INFO L87 Difference]: Start difference. First operand 504 states and 583 transitions. Second operand has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:02:06,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:06,032 INFO L93 Difference]: Finished difference Result 592 states and 690 transitions. [2022-01-31 20:02:06,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 20:02:06,043 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 190 [2022-01-31 20:02:06,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:06,044 INFO L225 Difference]: With dead ends: 592 [2022-01-31 20:02:06,045 INFO L226 Difference]: Without dead ends: 590 [2022-01-31 20:02:06,045 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2100 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=526, Invalid=10604, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:02:06,046 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 139 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 8056 mSolverCounterSat, 199 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 255 SdHoareTripleChecker+Invalid, 8255 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 199 IncrementalHoareTripleChecker+Valid, 8056 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:06,046 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 255 Invalid, 8255 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [199 Valid, 8056 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:02:06,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 590 states. [2022-01-31 20:02:06,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 590 to 506. [2022-01-31 20:02:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 506 states, 383 states have (on average 1.0208877284595301) internal successors, (391), 389 states have internal predecessors, (391), 98 states have call successors, (98), 25 states have call predecessors, (98), 24 states have return successors, (97), 91 states have call predecessors, (97), 97 states have call successors, (97) [2022-01-31 20:02:06,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 506 states to 506 states and 586 transitions. [2022-01-31 20:02:06,722 INFO L78 Accepts]: Start accepts. Automaton has 506 states and 586 transitions. Word has length 190 [2022-01-31 20:02:06,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:06,722 INFO L470 AbstractCegarLoop]: Abstraction has 506 states and 586 transitions. [2022-01-31 20:02:06,722 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.3095238095238093) internal successors, (97), 41 states have internal predecessors, (97), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:02:06,722 INFO L276 IsEmpty]: Start isEmpty. Operand 506 states and 586 transitions. [2022-01-31 20:02:06,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 20:02:06,723 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:06,723 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:06,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2022-01-31 20:02:06,723 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:06,723 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:06,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1689306537, now seen corresponding path program 110 times [2022-01-31 20:02:06,723 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:06,723 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1531013346] [2022-01-31 20:02:06,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:06,724 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:06,727 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:06,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:08,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:08,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,198 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:02:08,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,200 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:02:08,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,201 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:02:08,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,202 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:02:08,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,204 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:02:08,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:02:08,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:02:08,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:02:08,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,209 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:02:08,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:02:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:02:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:02:08,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:02:08,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:02:08,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:02:08,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:02:08,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:02:08,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:02:08,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:08,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:08,222 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:08,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1531013346] [2022-01-31 20:02:08,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1531013346] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:08,222 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:08,222 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:02:08,222 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520569948] [2022-01-31 20:02:08,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:08,222 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:02:08,222 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:08,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:02:08,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:02:08,223 INFO L87 Difference]: Start difference. First operand 506 states and 586 transitions. Second operand has 41 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:02:13,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:13,582 INFO L93 Difference]: Finished difference Result 534 states and 618 transitions. [2022-01-31 20:02:13,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:02:13,582 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 192 [2022-01-31 20:02:13,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:13,584 INFO L225 Difference]: With dead ends: 534 [2022-01-31 20:02:13,584 INFO L226 Difference]: Without dead ends: 532 [2022-01-31 20:02:13,584 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1581 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=426, Invalid=8504, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:02:13,584 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 105 mSDsluCounter, 159 mSDsCounter, 0 mSdLazyCounter, 6420 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 108 SdHoareTripleChecker+Valid, 230 SdHoareTripleChecker+Invalid, 6564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6420 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:13,585 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [108 Valid, 230 Invalid, 6564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6420 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 20:02:13,585 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 532 states. [2022-01-31 20:02:14,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 532 to 447. [2022-01-31 20:02:14,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 339 states have (on average 1.0235988200589972) internal successors, (347), 344 states have internal predecessors, (347), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 20:02:14,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 512 transitions. [2022-01-31 20:02:14,169 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 512 transitions. Word has length 192 [2022-01-31 20:02:14,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:14,169 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 512 transitions. [2022-01-31 20:02:14,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.35) internal successors, (94), 39 states have internal predecessors, (94), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:02:14,169 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 512 transitions. [2022-01-31 20:02:14,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2022-01-31 20:02:14,170 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:14,170 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:14,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2022-01-31 20:02:14,170 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:14,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:14,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1998424573, now seen corresponding path program 111 times [2022-01-31 20:02:14,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:14,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1029404132] [2022-01-31 20:02:14,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:14,171 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:14,174 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:14,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:15,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,262 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:15,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,263 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:15,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,264 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:02:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,265 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:02:15,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,266 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:02:15,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,267 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:02:15,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,268 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:02:15,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,269 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:02:15,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,270 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:02:15,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,271 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:02:15,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,272 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:02:15,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,273 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:02:15,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,275 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:02:15,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,276 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:02:15,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,277 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:02:15,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,278 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:02:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,279 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:02:15,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,280 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:02:15,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,281 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:02:15,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:15,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:15,283 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:15,283 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1029404132] [2022-01-31 20:02:15,283 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1029404132] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:15,283 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:15,283 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:02:15,283 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970951829] [2022-01-31 20:02:15,283 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:15,284 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:02:15,284 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:15,284 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:02:15,284 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:02:15,284 INFO L87 Difference]: Start difference. First operand 447 states and 512 transitions. Second operand has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:02:20,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:20,612 INFO L93 Difference]: Finished difference Result 553 states and 640 transitions. [2022-01-31 20:02:20,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:02:20,612 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 192 [2022-01-31 20:02:20,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:20,613 INFO L225 Difference]: With dead ends: 553 [2022-01-31 20:02:20,613 INFO L226 Difference]: Without dead ends: 551 [2022-01-31 20:02:20,614 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2294 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=552, Invalid=11438, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:02:20,614 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 151 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 8577 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 8791 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 8577 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:20,614 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 262 Invalid, 8791 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 8577 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:02:20,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2022-01-31 20:02:21,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 449. [2022-01-31 20:02:21,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 341 states have (on average 1.0263929618768328) internal successors, (350), 346 states have internal predecessors, (350), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 20:02:21,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 515 transitions. [2022-01-31 20:02:21,162 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 515 transitions. Word has length 192 [2022-01-31 20:02:21,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:21,162 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 515 transitions. [2022-01-31 20:02:21,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.302325581395349) internal successors, (99), 42 states have internal predecessors, (99), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:02:21,162 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 515 transitions. [2022-01-31 20:02:21,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 20:02:21,163 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:21,163 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:21,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2022-01-31 20:02:21,163 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:21,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:21,163 INFO L85 PathProgramCache]: Analyzing trace with hash 1838619701, now seen corresponding path program 112 times [2022-01-31 20:02:21,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:21,163 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474996690] [2022-01-31 20:02:21,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:21,164 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:21,167 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:21,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:22,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:22,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:22,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:02:22,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:02:22,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:02:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,160 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:02:22,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,161 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:02:22,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,162 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:02:22,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,163 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:02:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,164 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:02:22,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,165 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:02:22,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,166 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:02:22,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,167 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:02:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,168 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:02:22,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,169 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:02:22,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,170 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:02:22,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,171 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:02:22,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:02:22,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,173 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:02:22,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:02:22,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:22,176 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:22,176 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:22,176 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474996690] [2022-01-31 20:02:22,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [474996690] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:22,176 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:22,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:02:22,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274215580] [2022-01-31 20:02:22,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:22,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:02:22,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:22,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:02:22,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:02:22,177 INFO L87 Difference]: Start difference. First operand 449 states and 515 transitions. Second operand has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:02:26,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:26,734 INFO L93 Difference]: Finished difference Result 486 states and 558 transitions. [2022-01-31 20:02:26,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:02:26,734 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 194 [2022-01-31 20:02:26,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:26,735 INFO L225 Difference]: With dead ends: 486 [2022-01-31 20:02:26,735 INFO L226 Difference]: Without dead ends: 484 [2022-01-31 20:02:26,736 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1863 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=487, Invalid=9613, Unknown=0, NotChecked=0, Total=10100 [2022-01-31 20:02:26,736 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 117 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 6862 mSolverCounterSat, 173 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 7035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 173 IncrementalHoareTripleChecker+Valid, 6862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:26,736 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [120 Valid, 237 Invalid, 7035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [173 Valid, 6862 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 20:02:26,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2022-01-31 20:02:27,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 453. [2022-01-31 20:02:27,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 344 states have (on average 1.0261627906976745) internal successors, (353), 349 states have internal predecessors, (353), 84 states have call successors, (84), 25 states have call predecessors, (84), 24 states have return successors, (83), 78 states have call predecessors, (83), 83 states have call successors, (83) [2022-01-31 20:02:27,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 520 transitions. [2022-01-31 20:02:27,339 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 520 transitions. Word has length 194 [2022-01-31 20:02:27,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:27,339 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 520 transitions. [2022-01-31 20:02:27,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.341463414634146) internal successors, (96), 40 states have internal predecessors, (96), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:02:27,339 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 520 transitions. [2022-01-31 20:02:27,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 20:02:27,340 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:27,340 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:27,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2022-01-31 20:02:27,340 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:27,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:27,340 INFO L85 PathProgramCache]: Analyzing trace with hash 1560196333, now seen corresponding path program 113 times [2022-01-31 20:02:27,340 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:27,340 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [123134497] [2022-01-31 20:02:27,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:27,341 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:27,344 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:28,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:28,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:02:28,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:02:28,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:02:28,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:02:28,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:02:28,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,483 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:02:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:02:28,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:02:28,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:02:28,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,487 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:02:28,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:02:28,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:02:28,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,490 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:02:28,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,492 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:02:28,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,493 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:02:28,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,494 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:02:28,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:02:28,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:02:28,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:02:28,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:28,504 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:28,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [123134497] [2022-01-31 20:02:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [123134497] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:28,504 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:28,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [40] imperfect sequences [] total 40 [2022-01-31 20:02:28,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549334112] [2022-01-31 20:02:28,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:28,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2022-01-31 20:02:28,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:28,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2022-01-31 20:02:28,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1479, Unknown=0, NotChecked=0, Total=1560 [2022-01-31 20:02:28,505 INFO L87 Difference]: Start difference. First operand 453 states and 520 transitions. Second operand has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:02:32,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:32,597 INFO L93 Difference]: Finished difference Result 485 states and 557 transitions. [2022-01-31 20:02:32,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2022-01-31 20:02:32,598 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 196 [2022-01-31 20:02:32,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:32,599 INFO L225 Difference]: With dead ends: 485 [2022-01-31 20:02:32,599 INFO L226 Difference]: Without dead ends: 483 [2022-01-31 20:02:32,599 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1332 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=395, Invalid=7437, Unknown=0, NotChecked=0, Total=7832 [2022-01-31 20:02:32,600 INFO L933 BasicCegarLoop]: 59 mSDtfsCounter, 101 mSDsluCounter, 146 mSDsCounter, 0 mSdLazyCounter, 4891 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 104 SdHoareTripleChecker+Valid, 205 SdHoareTripleChecker+Invalid, 5034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4891 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:32,600 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [104 Valid, 205 Invalid, 5034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4891 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2022-01-31 20:02:32,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 483 states. [2022-01-31 20:02:33,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 483 to 449. [2022-01-31 20:02:33,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 449 states, 341 states have (on average 1.0263929618768328) internal successors, (350), 346 states have internal predecessors, (350), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 20:02:33,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 449 states to 449 states and 515 transitions. [2022-01-31 20:02:33,149 INFO L78 Accepts]: Start accepts. Automaton has 449 states and 515 transitions. Word has length 196 [2022-01-31 20:02:33,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:33,149 INFO L470 AbstractCegarLoop]: Abstraction has 449 states and 515 transitions. [2022-01-31 20:02:33,149 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.3846153846153846) internal successors, (93), 38 states have internal predecessors, (93), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:02:33,149 INFO L276 IsEmpty]: Start isEmpty. Operand 449 states and 515 transitions. [2022-01-31 20:02:33,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2022-01-31 20:02:33,150 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:33,150 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:33,150 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2022-01-31 20:02:33,150 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:33,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:33,150 INFO L85 PathProgramCache]: Analyzing trace with hash 1231383515, now seen corresponding path program 114 times [2022-01-31 20:02:33,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:33,150 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [797561267] [2022-01-31 20:02:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:33,151 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:33,154 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:33,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,205 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:34,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,206 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,207 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,208 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:02:34,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,210 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:02:34,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:02:34,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:02:34,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:02:34,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:02:34,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:02:34,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:02:34,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:02:34,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:02:34,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:02:34,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:02:34,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:02:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:02:34,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:02:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:02:34,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:02:34,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:34,229 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:34,229 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [797561267] [2022-01-31 20:02:34,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [797561267] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:34,229 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:34,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:02:34,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [588519910] [2022-01-31 20:02:34,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:34,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:02:34,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:34,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:02:34,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1804, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:02:34,230 INFO L87 Difference]: Start difference. First operand 449 states and 515 transitions. Second operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:02:39,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:39,376 INFO L93 Difference]: Finished difference Result 574 states and 667 transitions. [2022-01-31 20:02:39,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:02:39,377 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 194 [2022-01-31 20:02:39,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:39,378 INFO L225 Difference]: With dead ends: 574 [2022-01-31 20:02:39,378 INFO L226 Difference]: Without dead ends: 572 [2022-01-31 20:02:39,379 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2074 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=541, Invalid=11015, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:02:39,379 INFO L933 BasicCegarLoop]: 96 mSDtfsCounter, 162 mSDsluCounter, 186 mSDsCounter, 0 mSdLazyCounter, 9832 mSolverCounterSat, 220 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 165 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 10052 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 220 IncrementalHoareTripleChecker+Valid, 9832 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:39,379 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [165 Valid, 282 Invalid, 10052 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [220 Valid, 9832 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:02:39,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 572 states. [2022-01-31 20:02:40,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 572 to 451. [2022-01-31 20:02:40,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 451 states, 343 states have (on average 1.0291545189504374) internal successors, (353), 348 states have internal predecessors, (353), 83 states have call successors, (83), 25 states have call predecessors, (83), 24 states have return successors, (82), 77 states have call predecessors, (82), 82 states have call successors, (82) [2022-01-31 20:02:40,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 451 states to 451 states and 518 transitions. [2022-01-31 20:02:40,005 INFO L78 Accepts]: Start accepts. Automaton has 451 states and 518 transitions. Word has length 194 [2022-01-31 20:02:40,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:40,006 INFO L470 AbstractCegarLoop]: Abstraction has 451 states and 518 transitions. [2022-01-31 20:02:40,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:02:40,006 INFO L276 IsEmpty]: Start isEmpty. Operand 451 states and 518 transitions. [2022-01-31 20:02:40,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 20:02:40,007 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:40,007 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:40,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2022-01-31 20:02:40,007 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:40,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:40,007 INFO L85 PathProgramCache]: Analyzing trace with hash -848429421, now seen corresponding path program 115 times [2022-01-31 20:02:40,008 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:40,008 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1474204883] [2022-01-31 20:02:40,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:40,008 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:40,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:40,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:41,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,564 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:41,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,565 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:41,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,566 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:02:41,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:02:41,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:02:41,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:02:41,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:02:41,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:02:41,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:02:41,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:02:41,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:02:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:02:41,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:02:41,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:02:41,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:02:41,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,583 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:02:41,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:02:41,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:02:41,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:02:41,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:02:41,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:41,590 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:41,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:41,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1474204883] [2022-01-31 20:02:41,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1474204883] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:41,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:41,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:02:41,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827745560] [2022-01-31 20:02:41,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:41,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:02:41,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:41,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:02:41,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:02:41,592 INFO L87 Difference]: Start difference. First operand 451 states and 518 transitions. Second operand has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:02:47,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:47,576 INFO L93 Difference]: Finished difference Result 539 states and 625 transitions. [2022-01-31 20:02:47,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2022-01-31 20:02:47,576 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 196 [2022-01-31 20:02:47,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:47,578 INFO L225 Difference]: With dead ends: 539 [2022-01-31 20:02:47,578 INFO L226 Difference]: Without dead ends: 537 [2022-01-31 20:02:47,578 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1861 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=467, Invalid=9835, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:02:47,578 INFO L933 BasicCegarLoop]: 81 mSDtfsCounter, 124 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7590 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 7757 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 7590 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:47,579 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 248 Invalid, 7757 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 7590 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:02:47,579 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 537 states. [2022-01-31 20:02:48,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 537 to 530. [2022-01-31 20:02:48,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 402 states have (on average 1.0248756218905473) internal successors, (412), 408 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (101), 95 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 20:02:48,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 615 transitions. [2022-01-31 20:02:48,274 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 615 transitions. Word has length 196 [2022-01-31 20:02:48,274 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:48,274 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 615 transitions. [2022-01-31 20:02:48,274 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.3333333333333335) internal successors, (98), 41 states have internal predecessors, (98), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:02:48,274 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 615 transitions. [2022-01-31 20:02:48,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 20:02:48,275 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:48,275 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:48,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2022-01-31 20:02:48,275 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:48,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash 581334987, now seen corresponding path program 116 times [2022-01-31 20:02:48,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:48,275 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1816742351] [2022-01-31 20:02:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:48,276 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:48,279 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:48,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:49,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:49,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:02:49,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:02:49,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:02:49,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:02:49,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:02:49,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,647 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:02:49,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,648 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:02:49,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,650 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:02:49,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,651 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:02:49,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,652 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:02:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,653 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:02:49,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,655 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:02:49,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,656 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:02:49,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,657 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:02:49,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,659 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:02:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,660 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:02:49,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,661 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:02:49,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,663 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:02:49,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,664 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:02:49,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:49,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:49,667 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:49,667 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1816742351] [2022-01-31 20:02:49,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1816742351] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:49,667 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:49,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [41] imperfect sequences [] total 41 [2022-01-31 20:02:49,667 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1546935469] [2022-01-31 20:02:49,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:49,667 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-01-31 20:02:49,667 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:49,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-01-31 20:02:49,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=1557, Unknown=0, NotChecked=0, Total=1640 [2022-01-31 20:02:49,668 INFO L87 Difference]: Start difference. First operand 530 states and 615 transitions. Second operand has 41 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:02:54,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:02:54,059 INFO L93 Difference]: Finished difference Result 621 states and 726 transitions. [2022-01-31 20:02:54,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2022-01-31 20:02:54,059 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 198 [2022-01-31 20:02:54,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:02:54,060 INFO L225 Difference]: With dead ends: 621 [2022-01-31 20:02:54,060 INFO L226 Difference]: Without dead ends: 619 [2022-01-31 20:02:54,061 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1587 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=441, Invalid=8489, Unknown=0, NotChecked=0, Total=8930 [2022-01-31 20:02:54,061 INFO L933 BasicCegarLoop]: 66 mSDtfsCounter, 92 mSDsluCounter, 148 mSDsCounter, 0 mSdLazyCounter, 5551 mSolverCounterSat, 143 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 95 SdHoareTripleChecker+Valid, 214 SdHoareTripleChecker+Invalid, 5694 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 5551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:02:54,061 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [95 Valid, 214 Invalid, 5694 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 5551 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2022-01-31 20:02:54,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2022-01-31 20:02:54,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 589. [2022-01-31 20:02:54,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 589 states, 446 states have (on average 1.0224215246636772) internal successors, (456), 453 states have internal predecessors, (456), 117 states have call successors, (117), 26 states have call predecessors, (117), 25 states have return successors, (116), 109 states have call predecessors, (116), 116 states have call successors, (116) [2022-01-31 20:02:54,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 589 states to 589 states and 689 transitions. [2022-01-31 20:02:54,927 INFO L78 Accepts]: Start accepts. Automaton has 589 states and 689 transitions. Word has length 198 [2022-01-31 20:02:54,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:02:54,927 INFO L470 AbstractCegarLoop]: Abstraction has 589 states and 689 transitions. [2022-01-31 20:02:54,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.375) internal successors, (95), 39 states have internal predecessors, (95), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:02:54,927 INFO L276 IsEmpty]: Start isEmpty. Operand 589 states and 689 transitions. [2022-01-31 20:02:54,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2022-01-31 20:02:54,928 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:02:54,928 INFO L514 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:02:54,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2022-01-31 20:02:54,928 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:02:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:02:54,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1455665607, now seen corresponding path program 117 times [2022-01-31 20:02:54,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:02:54,929 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [823339185] [2022-01-31 20:02:54,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:02:54,929 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:02:54,932 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:02:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:02:56,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:02:56,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:02:56,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:02:56,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:02:56,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:02:56,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:02:56,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:02:56,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:02:56,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:02:56,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:02:56,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:02:56,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:02:56,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:02:56,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:02:56,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:02:56,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:02:56,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:02:56,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:02:56,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:02:56,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:02:56,157 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:02:56,157 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:02:56,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [823339185] [2022-01-31 20:02:56,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [823339185] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:02:56,157 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:02:56,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:02:56,157 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312515044] [2022-01-31 20:02:56,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:02:56,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:02:56,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:02:56,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:02:56,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1887, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:02:56,158 INFO L87 Difference]: Start difference. First operand 589 states and 689 transitions. Second operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:03:01,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:01,782 INFO L93 Difference]: Finished difference Result 739 states and 872 transitions. [2022-01-31 20:03:01,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-01-31 20:03:01,783 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 196 [2022-01-31 20:03:01,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:01,784 INFO L225 Difference]: With dead ends: 739 [2022-01-31 20:03:01,784 INFO L226 Difference]: Without dead ends: 737 [2022-01-31 20:03:01,785 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1032 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=394, Invalid=7262, Unknown=0, NotChecked=0, Total=7656 [2022-01-31 20:03:01,786 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 168 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10166 mSolverCounterSat, 188 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 10354 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 188 IncrementalHoareTripleChecker+Valid, 10166 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:01,786 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 286 Invalid, 10354 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [188 Valid, 10166 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:03:01,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2022-01-31 20:03:03,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 658. [2022-01-31 20:03:03,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 498 states have (on average 1.0220883534136547) internal successors, (509), 506 states have internal predecessors, (509), 134 states have call successors, (134), 26 states have call predecessors, (134), 25 states have return successors, (133), 125 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 20:03:03,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 776 transitions. [2022-01-31 20:03:03,095 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 776 transitions. Word has length 196 [2022-01-31 20:03:03,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:03,096 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 776 transitions. [2022-01-31 20:03:03,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:03:03,096 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 776 transitions. [2022-01-31 20:03:03,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 20:03:03,097 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:03,097 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:03,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2022-01-31 20:03:03,097 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:03,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:03,097 INFO L85 PathProgramCache]: Analyzing trace with hash -1827290767, now seen corresponding path program 118 times [2022-01-31 20:03:03,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:03,097 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [520667209] [2022-01-31 20:03:03,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:03,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:03,101 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:03,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:04,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:04,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:03:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:03:04,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:03:04,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:03:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:03:04,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:03:04,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:03:04,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,422 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:03:04,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:03:04,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:03:04,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:03:04,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,426 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:03:04,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:03:04,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,430 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:03:04,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:03:04,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:03:04,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,434 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:03:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:03:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:04,436 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:04,437 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:04,437 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [520667209] [2022-01-31 20:03:04,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [520667209] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:04,437 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:04,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:03:04,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718050316] [2022-01-31 20:03:04,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:04,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:03:04,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:04,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:03:04,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:03:04,437 INFO L87 Difference]: Start difference. First operand 658 states and 776 transitions. Second operand has 44 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:03:09,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:09,932 INFO L93 Difference]: Finished difference Result 745 states and 882 transitions. [2022-01-31 20:03:09,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:03:09,933 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 198 [2022-01-31 20:03:09,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:09,935 INFO L225 Difference]: With dead ends: 745 [2022-01-31 20:03:09,935 INFO L226 Difference]: Without dead ends: 743 [2022-01-31 20:03:09,936 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2169 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=532, Invalid=11024, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:03:09,936 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 136 mSDsluCounter, 173 mSDsCounter, 0 mSdLazyCounter, 8267 mSolverCounterSat, 197 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 258 SdHoareTripleChecker+Invalid, 8464 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 197 IncrementalHoareTripleChecker+Valid, 8267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:09,936 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 258 Invalid, 8464 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [197 Valid, 8267 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 20:03:09,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 743 states. [2022-01-31 20:03:10,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 743 to 658. [2022-01-31 20:03:10,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 658 states, 498 states have (on average 1.0220883534136547) internal successors, (509), 506 states have internal predecessors, (509), 134 states have call successors, (134), 26 states have call predecessors, (134), 25 states have return successors, (133), 125 states have call predecessors, (133), 133 states have call successors, (133) [2022-01-31 20:03:10,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 658 states to 658 states and 776 transitions. [2022-01-31 20:03:10,892 INFO L78 Accepts]: Start accepts. Automaton has 658 states and 776 transitions. Word has length 198 [2022-01-31 20:03:10,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:10,892 INFO L470 AbstractCegarLoop]: Abstraction has 658 states and 776 transitions. [2022-01-31 20:03:10,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3255813953488373) internal successors, (100), 42 states have internal predecessors, (100), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:03:10,892 INFO L276 IsEmpty]: Start isEmpty. Operand 658 states and 776 transitions. [2022-01-31 20:03:10,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 20:03:10,893 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:10,894 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:10,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2022-01-31 20:03:10,894 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:10,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:10,894 INFO L85 PathProgramCache]: Analyzing trace with hash 493419305, now seen corresponding path program 119 times [2022-01-31 20:03:10,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:10,894 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [525086103] [2022-01-31 20:03:10,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:10,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:10,898 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:10,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,418 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:12,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,420 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:12,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:03:12,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,423 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:03:12,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,424 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:03:12,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,425 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:03:12,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,427 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:03:12,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,428 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:03:12,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,429 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:03:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,431 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:03:12,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,432 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:03:12,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,433 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:03:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,435 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:03:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,436 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:03:12,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,437 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:03:12,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,439 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:03:12,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,440 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:03:12,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,441 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:03:12,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,443 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:03:12,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,444 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:03:12,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,446 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:03:12,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:12,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:12,456 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:12,457 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [525086103] [2022-01-31 20:03:12,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [525086103] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:12,457 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:12,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:03:12,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750493672] [2022-01-31 20:03:12,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:12,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:03:12,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:12,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:03:12,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1637, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:03:12,458 INFO L87 Difference]: Start difference. First operand 658 states and 776 transitions. Second operand has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:03:18,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:18,077 INFO L93 Difference]: Finished difference Result 690 states and 813 transitions. [2022-01-31 20:03:18,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:03:18,078 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 200 [2022-01-31 20:03:18,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:18,079 INFO L225 Difference]: With dead ends: 690 [2022-01-31 20:03:18,079 INFO L226 Difference]: Without dead ends: 688 [2022-01-31 20:03:18,079 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1642 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=432, Invalid=8880, Unknown=0, NotChecked=0, Total=9312 [2022-01-31 20:03:18,080 INFO L933 BasicCegarLoop]: 71 mSDtfsCounter, 103 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 6546 mSolverCounterSat, 144 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 106 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 6690 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 144 IncrementalHoareTripleChecker+Valid, 6546 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:18,080 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [106 Valid, 233 Invalid, 6690 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [144 Valid, 6546 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 20:03:18,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 688 states. [2022-01-31 20:03:18,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 688 to 599. [2022-01-31 20:03:18,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 599 states, 454 states have (on average 1.024229074889868) internal successors, (465), 461 states have internal predecessors, (465), 119 states have call successors, (119), 26 states have call predecessors, (119), 25 states have return successors, (118), 111 states have call predecessors, (118), 118 states have call successors, (118) [2022-01-31 20:03:18,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 599 states to 599 states and 702 transitions. [2022-01-31 20:03:18,890 INFO L78 Accepts]: Start accepts. Automaton has 599 states and 702 transitions. Word has length 200 [2022-01-31 20:03:18,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:18,891 INFO L470 AbstractCegarLoop]: Abstraction has 599 states and 702 transitions. [2022-01-31 20:03:18,891 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3658536585365852) internal successors, (97), 40 states have internal predecessors, (97), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:03:18,891 INFO L276 IsEmpty]: Start isEmpty. Operand 599 states and 702 transitions. [2022-01-31 20:03:18,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2022-01-31 20:03:18,892 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:18,892 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 18, 18, 18, 17, 17, 17, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:18,892 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2022-01-31 20:03:18,892 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:18,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:18,892 INFO L85 PathProgramCache]: Analyzing trace with hash 1860440343, now seen corresponding path program 120 times [2022-01-31 20:03:18,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:18,892 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [915496681] [2022-01-31 20:03:18,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:18,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:18,896 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:19,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:19,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:19,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:03:19,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:03:19,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:03:19,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:03:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:03:19,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:03:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:03:19,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:03:19,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:03:19,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:03:19,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:03:19,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:03:19,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:03:19,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:03:19,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:03:19,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:03:19,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:03:19,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:19,961 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:19,961 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:19,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [915496681] [2022-01-31 20:03:19,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [915496681] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:19,961 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:19,961 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:03:19,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387866217] [2022-01-31 20:03:19,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:19,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:03:19,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:19,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:03:19,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:03:19,962 INFO L87 Difference]: Start difference. First operand 599 states and 702 transitions. Second operand has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:03:25,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:25,712 INFO L93 Difference]: Finished difference Result 689 states and 807 transitions. [2022-01-31 20:03:25,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 20:03:25,712 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) Word has length 198 [2022-01-31 20:03:25,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:25,714 INFO L225 Difference]: With dead ends: 689 [2022-01-31 20:03:25,714 INFO L226 Difference]: Without dead ends: 687 [2022-01-31 20:03:25,715 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2481 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=473, Invalid=12409, Unknown=0, NotChecked=0, Total=12882 [2022-01-31 20:03:25,715 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 179 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 10146 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 182 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 10361 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10146 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:25,715 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [182 Valid, 282 Invalid, 10361 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10146 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:03:25,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 687 states. [2022-01-31 20:03:26,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 687 to 530. [2022-01-31 20:03:26,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 402 states have (on average 1.0248756218905473) internal successors, (412), 408 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (101), 95 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 20:03:26,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 615 transitions. [2022-01-31 20:03:26,438 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 615 transitions. Word has length 198 [2022-01-31 20:03:26,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:26,439 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 615 transitions. [2022-01-31 20:03:26,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 19 states have call successors, (22), 3 states have call predecessors, (22), 1 states have return successors, (20), 18 states have call predecessors, (20), 18 states have call successors, (20) [2022-01-31 20:03:26,439 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 615 transitions. [2022-01-31 20:03:26,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2022-01-31 20:03:26,440 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:26,440 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:26,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2022-01-31 20:03:26,440 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:26,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:26,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1915206449, now seen corresponding path program 121 times [2022-01-31 20:03:26,440 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:26,440 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357887245] [2022-01-31 20:03:26,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:26,440 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:26,444 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:26,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:27,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:27,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:03:27,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:03:27,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:03:27,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:03:27,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:03:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:03:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:03:27,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:03:27,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:03:27,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:03:27,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:03:27,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,405 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:03:27,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:03:27,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:03:27,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:03:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:03:27,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:03:27,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:03:27,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:27,413 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:27,413 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:27,413 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357887245] [2022-01-31 20:03:27,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [357887245] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:27,413 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:27,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:03:27,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675670137] [2022-01-31 20:03:27,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:27,419 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:03:27,419 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:03:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:03:27,420 INFO L87 Difference]: Start difference. First operand 530 states and 615 transitions. Second operand has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 43 states have internal predecessors, (102), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:03:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:32,722 INFO L93 Difference]: Finished difference Result 627 states and 732 transitions. [2022-01-31 20:03:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 20:03:32,722 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 43 states have internal predecessors, (102), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 200 [2022-01-31 20:03:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:32,724 INFO L225 Difference]: With dead ends: 627 [2022-01-31 20:03:32,724 INFO L226 Difference]: Without dead ends: 625 [2022-01-31 20:03:32,725 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=558, Invalid=11874, Unknown=0, NotChecked=0, Total=12432 [2022-01-31 20:03:32,725 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 148 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 9228 mSolverCounterSat, 211 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 151 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 9439 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 211 IncrementalHoareTripleChecker+Valid, 9228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:32,725 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [151 Valid, 273 Invalid, 9439 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [211 Valid, 9228 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 20:03:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 625 states. [2022-01-31 20:03:33,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 625 to 530. [2022-01-31 20:03:33,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 530 states, 402 states have (on average 1.0248756218905473) internal successors, (412), 408 states have internal predecessors, (412), 102 states have call successors, (102), 26 states have call predecessors, (102), 25 states have return successors, (101), 95 states have call predecessors, (101), 101 states have call successors, (101) [2022-01-31 20:03:33,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 530 states to 530 states and 615 transitions. [2022-01-31 20:03:33,455 INFO L78 Accepts]: Start accepts. Automaton has 530 states and 615 transitions. Word has length 200 [2022-01-31 20:03:33,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:33,455 INFO L470 AbstractCegarLoop]: Abstraction has 530 states and 615 transitions. [2022-01-31 20:03:33,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3181818181818183) internal successors, (102), 43 states have internal predecessors, (102), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:03:33,455 INFO L276 IsEmpty]: Start isEmpty. Operand 530 states and 615 transitions. [2022-01-31 20:03:33,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 20:03:33,457 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:33,458 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:33,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2022-01-31 20:03:33,458 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:33,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:33,458 INFO L85 PathProgramCache]: Analyzing trace with hash 1905794823, now seen corresponding path program 122 times [2022-01-31 20:03:33,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:33,459 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [114509330] [2022-01-31 20:03:33,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:33,459 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:33,463 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:33,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,847 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:34,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,848 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:34,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,849 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,850 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:03:34,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,851 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:03:34,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,852 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:03:34,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,853 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:03:34,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,854 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:03:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,855 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:03:34,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,856 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:03:34,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:03:34,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:03:34,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:03:34,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:03:34,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:03:34,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:03:34,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:03:34,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:03:34,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:03:34,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:03:34,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:03:34,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:03:34,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:34,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:34,905 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:34,905 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [114509330] [2022-01-31 20:03:34,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [114509330] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:34,905 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:34,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:03:34,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [499981977] [2022-01-31 20:03:34,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:34,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:03:34,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:34,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:03:34,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1717, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:03:34,906 INFO L87 Difference]: Start difference. First operand 530 states and 615 transitions. Second operand has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:03:40,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:40,833 INFO L93 Difference]: Finished difference Result 571 states and 663 transitions. [2022-01-31 20:03:40,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:03:40,833 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 202 [2022-01-31 20:03:40,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:40,834 INFO L225 Difference]: With dead ends: 571 [2022-01-31 20:03:40,834 INFO L226 Difference]: Without dead ends: 569 [2022-01-31 20:03:40,835 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1697 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=460, Invalid=9242, Unknown=0, NotChecked=0, Total=9702 [2022-01-31 20:03:40,835 INFO L933 BasicCegarLoop]: 76 mSDtfsCounter, 116 mSDsluCounter, 172 mSDsCounter, 0 mSdLazyCounter, 7396 mSolverCounterSat, 167 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 119 SdHoareTripleChecker+Valid, 248 SdHoareTripleChecker+Invalid, 7563 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 167 IncrementalHoareTripleChecker+Valid, 7396 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:40,835 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [119 Valid, 248 Invalid, 7563 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [167 Valid, 7396 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:03:40,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 569 states. [2022-01-31 20:03:41,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 569 to 534. [2022-01-31 20:03:41,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 534 states, 405 states have (on average 1.0246913580246915) internal successors, (415), 411 states have internal predecessors, (415), 103 states have call successors, (103), 26 states have call predecessors, (103), 25 states have return successors, (102), 96 states have call predecessors, (102), 102 states have call successors, (102) [2022-01-31 20:03:41,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 534 states to 534 states and 620 transitions. [2022-01-31 20:03:41,581 INFO L78 Accepts]: Start accepts. Automaton has 534 states and 620 transitions. Word has length 202 [2022-01-31 20:03:41,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:41,582 INFO L470 AbstractCegarLoop]: Abstraction has 534 states and 620 transitions. [2022-01-31 20:03:41,582 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.357142857142857) internal successors, (99), 41 states have internal predecessors, (99), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:03:41,582 INFO L276 IsEmpty]: Start isEmpty. Operand 534 states and 620 transitions. [2022-01-31 20:03:41,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 20:03:41,583 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:41,583 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 10, 10, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:41,583 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2022-01-31 20:03:41,584 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:41,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:41,584 INFO L85 PathProgramCache]: Analyzing trace with hash 1024950207, now seen corresponding path program 123 times [2022-01-31 20:03:41,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:41,584 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1733578578] [2022-01-31 20:03:41,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:41,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:41,588 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:41,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:41,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:41,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:41,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,941 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 40 [2022-01-31 20:03:41,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:03:41,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:03:41,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:03:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:03:41,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:03:41,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:03:41,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:03:41,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:03:41,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:03:41,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:03:41,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:03:41,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:03:41,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:03:41,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:03:41,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:03:41,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:03:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,961 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:03:41,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,962 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:03:41,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,963 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:03:41,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:41,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:41,965 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:41,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1733578578] [2022-01-31 20:03:41,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1733578578] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:41,965 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:41,965 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [36] imperfect sequences [] total 36 [2022-01-31 20:03:41,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32668737] [2022-01-31 20:03:41,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:41,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2022-01-31 20:03:41,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:41,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2022-01-31 20:03:41,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=326, Invalid=934, Unknown=0, NotChecked=0, Total=1260 [2022-01-31 20:03:41,966 INFO L87 Difference]: Start difference. First operand 534 states and 620 transitions. Second operand has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:03:43,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:43,329 INFO L93 Difference]: Finished difference Result 567 states and 658 transitions. [2022-01-31 20:03:43,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-01-31 20:03:43,329 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 204 [2022-01-31 20:03:43,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:43,330 INFO L225 Difference]: With dead ends: 567 [2022-01-31 20:03:43,330 INFO L226 Difference]: Without dead ends: 475 [2022-01-31 20:03:43,330 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=952, Invalid=3604, Unknown=0, NotChecked=0, Total=4556 [2022-01-31 20:03:43,331 INFO L933 BasicCegarLoop]: 58 mSDtfsCounter, 209 mSDsluCounter, 42 mSDsCounter, 0 mSdLazyCounter, 859 mSolverCounterSat, 237 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 212 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 1096 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 237 IncrementalHoareTripleChecker+Valid, 859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:43,331 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [212 Valid, 100 Invalid, 1096 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [237 Valid, 859 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2022-01-31 20:03:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2022-01-31 20:03:43,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 475. [2022-01-31 20:03:43,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 475 states, 361 states have (on average 1.0249307479224377) internal successors, (370), 366 states have internal predecessors, (370), 88 states have call successors, (88), 26 states have call predecessors, (88), 25 states have return successors, (87), 82 states have call predecessors, (87), 87 states have call successors, (87) [2022-01-31 20:03:43,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 475 states to 475 states and 545 transitions. [2022-01-31 20:03:43,956 INFO L78 Accepts]: Start accepts. Automaton has 475 states and 545 transitions. Word has length 204 [2022-01-31 20:03:43,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:43,956 INFO L470 AbstractCegarLoop]: Abstraction has 475 states and 545 transitions. [2022-01-31 20:03:43,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.6666666666666665) internal successors, (96), 35 states have internal predecessors, (96), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:03:43,956 INFO L276 IsEmpty]: Start isEmpty. Operand 475 states and 545 transitions. [2022-01-31 20:03:43,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2022-01-31 20:03:43,957 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:43,957 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:43,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2022-01-31 20:03:43,960 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:43,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:43,960 INFO L85 PathProgramCache]: Analyzing trace with hash -502830931, now seen corresponding path program 124 times [2022-01-31 20:03:43,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:43,961 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [61654176] [2022-01-31 20:03:43,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:43,963 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:43,972 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:45,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,709 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:45,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:45,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:03:45,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:03:45,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:03:45,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:03:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:03:45,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:03:45,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:03:45,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:03:45,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:03:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,722 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:03:45,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:03:45,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:03:45,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,725 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:03:45,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,726 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:03:45,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,727 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:03:45,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,729 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:03:45,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,730 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:03:45,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,731 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:03:45,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:45,733 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:45,733 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:45,735 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [61654176] [2022-01-31 20:03:45,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [61654176] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:45,735 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:45,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:03:45,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193147125] [2022-01-31 20:03:45,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:45,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:03:45,738 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:45,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:03:45,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:03:45,740 INFO L87 Difference]: Start difference. First operand 475 states and 545 transitions. Second operand has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 44 states have internal predecessors, (104), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:03:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:52,500 INFO L93 Difference]: Finished difference Result 509 states and 583 transitions. [2022-01-31 20:03:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:03:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 44 states have internal predecessors, (104), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 202 [2022-01-31 20:03:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:52,503 INFO L225 Difference]: With dead ends: 509 [2022-01-31 20:03:52,503 INFO L226 Difference]: Without dead ends: 507 [2022-01-31 20:03:52,505 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2041 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=524, Invalid=11032, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:03:52,505 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 156 mSDsluCounter, 189 mSDsCounter, 0 mSdLazyCounter, 10072 mSolverCounterSat, 215 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 284 SdHoareTripleChecker+Invalid, 10287 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 215 IncrementalHoareTripleChecker+Valid, 10072 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:52,506 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [159 Valid, 284 Invalid, 10287 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [215 Valid, 10072 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2022-01-31 20:03:52,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 507 states. [2022-01-31 20:03:53,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 507 to 404. [2022-01-31 20:03:53,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 404 states, 308 states have (on average 1.0292207792207793) internal successors, (317), 312 states have internal predecessors, (317), 70 states have call successors, (70), 26 states have call predecessors, (70), 25 states have return successors, (69), 65 states have call predecessors, (69), 69 states have call successors, (69) [2022-01-31 20:03:53,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 404 states to 404 states and 456 transitions. [2022-01-31 20:03:53,038 INFO L78 Accepts]: Start accepts. Automaton has 404 states and 456 transitions. Word has length 202 [2022-01-31 20:03:53,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:03:53,039 INFO L470 AbstractCegarLoop]: Abstraction has 404 states and 456 transitions. [2022-01-31 20:03:53,039 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.311111111111111) internal successors, (104), 44 states have internal predecessors, (104), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:03:53,039 INFO L276 IsEmpty]: Start isEmpty. Operand 404 states and 456 transitions. [2022-01-31 20:03:53,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 20:03:53,040 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:03:53,040 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:03:53,041 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2022-01-31 20:03:53,041 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:03:53,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:03:53,041 INFO L85 PathProgramCache]: Analyzing trace with hash 1989002085, now seen corresponding path program 125 times [2022-01-31 20:03:53,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:03:53,041 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1438728196] [2022-01-31 20:03:53,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:03:53,041 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:03:53,045 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:03:53,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:03:54,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:03:54,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:03:54,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,592 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:03:54,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:03:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:03:54,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:03:54,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:03:54,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:03:54,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:03:54,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:03:54,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:03:54,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:03:54,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:03:54,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:03:54,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:03:54,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:03:54,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:03:54,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:03:54,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:03:54,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:03:54,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:03:54,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:03:54,631 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:03:54,631 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:03:54,631 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1438728196] [2022-01-31 20:03:54,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1438728196] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:03:54,631 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:03:54,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:03:54,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532575406] [2022-01-31 20:03:54,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:03:54,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:03:54,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:03:54,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:03:54,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1801, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:03:54,633 INFO L87 Difference]: Start difference. First operand 404 states and 456 transitions. Second operand has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:03:59,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:03:59,812 INFO L93 Difference]: Finished difference Result 496 states and 568 transitions. [2022-01-31 20:03:59,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-01-31 20:03:59,812 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 204 [2022-01-31 20:03:59,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:03:59,813 INFO L225 Difference]: With dead ends: 496 [2022-01-31 20:03:59,813 INFO L226 Difference]: Without dead ends: 494 [2022-01-31 20:03:59,814 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=479, Invalid=9823, Unknown=0, NotChecked=0, Total=10302 [2022-01-31 20:03:59,814 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 124 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7679 mSolverCounterSat, 179 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 250 SdHoareTripleChecker+Invalid, 7858 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 179 IncrementalHoareTripleChecker+Valid, 7679 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:03:59,814 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [127 Valid, 250 Invalid, 7858 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [179 Valid, 7679 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 20:03:59,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 494 states. [2022-01-31 20:04:00,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 494 to 487. [2022-01-31 20:04:00,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 20:04:00,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 20:04:00,516 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 204 [2022-01-31 20:04:00,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:00,516 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 20:04:00,516 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.3488372093023258) internal successors, (101), 42 states have internal predecessors, (101), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:04:00,516 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 20:04:00,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 20:04:00,517 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:00,517 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:00,517 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2022-01-31 20:04:00,517 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:00,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:00,517 INFO L85 PathProgramCache]: Analyzing trace with hash -617249635, now seen corresponding path program 126 times [2022-01-31 20:04:00,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:00,517 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1777526900] [2022-01-31 20:04:00,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:00,518 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:00,521 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:00,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,555 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:02,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,557 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:02,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,558 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:02,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,559 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:04:02,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,560 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:04:02,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,561 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:04:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,562 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:04:02,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:04:02,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,568 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:04:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:04:02,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:04:02,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:04:02,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:04:02,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:04:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,580 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:04:02,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:04:02,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,582 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:04:02,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,584 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:04:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,585 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:04:02,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,586 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:04:02,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,587 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:04:02,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,588 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:04:02,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,589 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:04:02,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:02,591 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:02,591 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1777526900] [2022-01-31 20:04:02,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1777526900] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:02,591 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:02,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [42] imperfect sequences [] total 42 [2022-01-31 20:04:02,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729257261] [2022-01-31 20:04:02,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:02,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-01-31 20:04:02,591 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:02,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-01-31 20:04:02,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1636, Unknown=0, NotChecked=0, Total=1722 [2022-01-31 20:04:02,592 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:04:07,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:07,775 INFO L93 Difference]: Finished difference Result 582 states and 674 transitions. [2022-01-31 20:04:07,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-01-31 20:04:07,776 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 206 [2022-01-31 20:04:07,776 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:07,777 INFO L225 Difference]: With dead ends: 582 [2022-01-31 20:04:07,777 INFO L226 Difference]: Without dead ends: 580 [2022-01-31 20:04:07,778 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1433 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=406, Invalid=8150, Unknown=0, NotChecked=0, Total=8556 [2022-01-31 20:04:07,778 INFO L933 BasicCegarLoop]: 61 mSDtfsCounter, 112 mSDsluCounter, 163 mSDsCounter, 0 mSdLazyCounter, 5704 mSolverCounterSat, 145 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 224 SdHoareTripleChecker+Invalid, 5849 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 145 IncrementalHoareTripleChecker+Valid, 5704 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:07,778 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 224 Invalid, 5849 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [145 Valid, 5704 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2022-01-31 20:04:07,778 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2022-01-31 20:04:08,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 546. [2022-01-31 20:04:08,568 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 546 states, 414 states have (on average 1.0217391304347827) internal successors, (423), 420 states have internal predecessors, (423), 105 states have call successors, (105), 27 states have call predecessors, (105), 26 states have return successors, (104), 98 states have call predecessors, (104), 104 states have call successors, (104) [2022-01-31 20:04:08,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 546 states to 546 states and 632 transitions. [2022-01-31 20:04:08,569 INFO L78 Accepts]: Start accepts. Automaton has 546 states and 632 transitions. Word has length 206 [2022-01-31 20:04:08,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:08,569 INFO L470 AbstractCegarLoop]: Abstraction has 546 states and 632 transitions. [2022-01-31 20:04:08,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 40 states have internal predecessors, (98), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:04:08,569 INFO L276 IsEmpty]: Start isEmpty. Operand 546 states and 632 transitions. [2022-01-31 20:04:08,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2022-01-31 20:04:08,570 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:08,570 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:08,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2022-01-31 20:04:08,570 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:08,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:08,570 INFO L85 PathProgramCache]: Analyzing trace with hash -419623669, now seen corresponding path program 127 times [2022-01-31 20:04:08,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:08,571 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [672600988] [2022-01-31 20:04:08,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:08,571 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:08,575 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:08,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,920 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:09,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:04:09,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,925 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:04:09,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,927 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:04:09,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:04:09,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:04:09,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:04:09,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,933 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:04:09,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:04:09,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:04:09,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,937 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:04:09,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:04:09,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:04:09,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:04:09,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:04:09,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:04:09,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,947 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:04:09,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:04:09,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,973 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:04:09,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:09,975 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:09,975 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:09,975 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [672600988] [2022-01-31 20:04:09,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [672600988] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:09,975 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:09,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:04:09,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9953886] [2022-01-31 20:04:09,976 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:09,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:04:09,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:09,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:04:09,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:04:09,976 INFO L87 Difference]: Start difference. First operand 546 states and 632 transitions. Second operand has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:04:16,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:16,048 INFO L93 Difference]: Finished difference Result 678 states and 793 transitions. [2022-01-31 20:04:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 20:04:16,048 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 204 [2022-01-31 20:04:16,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:16,050 INFO L225 Difference]: With dead ends: 678 [2022-01-31 20:04:16,050 INFO L226 Difference]: Without dead ends: 676 [2022-01-31 20:04:16,051 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2272 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=566, Invalid=12090, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:04:16,051 INFO L933 BasicCegarLoop]: 100 mSDtfsCounter, 168 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 10348 mSolverCounterSat, 231 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 171 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 10579 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 231 IncrementalHoareTripleChecker+Valid, 10348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:16,052 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [171 Valid, 287 Invalid, 10579 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [231 Valid, 10348 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:04:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2022-01-31 20:04:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 615. [2022-01-31 20:04:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 466 states have (on average 1.0214592274678111) internal successors, (476), 473 states have internal predecessors, (476), 122 states have call successors, (122), 27 states have call predecessors, (122), 26 states have return successors, (121), 114 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 20:04:17,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 719 transitions. [2022-01-31 20:04:17,029 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 719 transitions. Word has length 204 [2022-01-31 20:04:17,030 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:17,030 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 719 transitions. [2022-01-31 20:04:17,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:04:17,030 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 719 transitions. [2022-01-31 20:04:17,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 20:04:17,031 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:17,031 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:17,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2022-01-31 20:04:17,031 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:17,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:17,031 INFO L85 PathProgramCache]: Analyzing trace with hash 346802243, now seen corresponding path program 128 times [2022-01-31 20:04:17,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:17,031 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [951673666] [2022-01-31 20:04:17,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:17,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:17,035 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:17,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:18,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:18,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:18,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:04:18,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:04:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:04:18,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:04:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:04:18,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:04:18,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:04:18,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:04:18,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:04:18,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:04:18,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:04:18,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:04:18,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:04:18,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:04:18,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:04:18,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:04:18,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,311 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:04:18,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:04:18,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:04:18,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:18,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:18,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [951673666] [2022-01-31 20:04:18,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [951673666] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:18,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:18,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:04:18,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638582360] [2022-01-31 20:04:18,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:18,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:04:18,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:18,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:04:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:04:18,316 INFO L87 Difference]: Start difference. First operand 615 states and 719 transitions. Second operand has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:04:23,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:23,951 INFO L93 Difference]: Finished difference Result 706 states and 830 transitions. [2022-01-31 20:04:23,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:04:23,951 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 206 [2022-01-31 20:04:23,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:23,953 INFO L225 Difference]: With dead ends: 706 [2022-01-31 20:04:23,953 INFO L226 Difference]: Without dead ends: 704 [2022-01-31 20:04:23,954 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2175 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=531, Invalid=11241, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:04:23,954 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 130 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 8843 mSolverCounterSat, 192 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 133 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 9035 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 192 IncrementalHoareTripleChecker+Valid, 8843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:23,954 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [133 Valid, 269 Invalid, 9035 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [192 Valid, 8843 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 20:04:23,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 704 states. [2022-01-31 20:04:24,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 704 to 615. [2022-01-31 20:04:24,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 615 states, 466 states have (on average 1.0214592274678111) internal successors, (476), 473 states have internal predecessors, (476), 122 states have call successors, (122), 27 states have call predecessors, (122), 26 states have return successors, (121), 114 states have call predecessors, (121), 121 states have call successors, (121) [2022-01-31 20:04:24,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 719 transitions. [2022-01-31 20:04:24,870 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 719 transitions. Word has length 206 [2022-01-31 20:04:24,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:24,870 INFO L470 AbstractCegarLoop]: Abstraction has 615 states and 719 transitions. [2022-01-31 20:04:24,870 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.340909090909091) internal successors, (103), 43 states have internal predecessors, (103), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:04:24,870 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 719 transitions. [2022-01-31 20:04:24,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 20:04:24,872 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:24,872 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:24,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2022-01-31 20:04:24,872 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:24,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:24,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1776667131, now seen corresponding path program 129 times [2022-01-31 20:04:24,872 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:24,872 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [269367187] [2022-01-31 20:04:24,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:24,872 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:24,876 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:24,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:26,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:26,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:26,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:04:26,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:04:26,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:04:26,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,391 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:04:26,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:04:26,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:04:26,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:04:26,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:04:26,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:04:26,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:04:26,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:04:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:04:26,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:04:26,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:04:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:04:26,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:04:26,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:04:26,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:04:26,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:04:26,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:04:26,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:26,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:26,415 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:26,415 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [269367187] [2022-01-31 20:04:26,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [269367187] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:26,416 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:26,416 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:04:26,416 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436710561] [2022-01-31 20:04:26,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:26,416 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:04:26,416 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:26,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:04:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=1719, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:04:26,416 INFO L87 Difference]: Start difference. First operand 615 states and 719 transitions. Second operand has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:04:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:31,218 INFO L93 Difference]: Finished difference Result 651 states and 761 transitions. [2022-01-31 20:04:31,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:04:31,218 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 208 [2022-01-31 20:04:31,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:31,221 INFO L225 Difference]: With dead ends: 651 [2022-01-31 20:04:31,221 INFO L226 Difference]: Without dead ends: 649 [2022-01-31 20:04:31,221 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1760 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=466, Invalid=9434, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:04:31,222 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 98 mSDsluCounter, 165 mSDsCounter, 0 mSdLazyCounter, 6611 mSolverCounterSat, 153 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 101 SdHoareTripleChecker+Valid, 235 SdHoareTripleChecker+Invalid, 6764 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 153 IncrementalHoareTripleChecker+Valid, 6611 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:31,222 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [101 Valid, 235 Invalid, 6764 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [153 Valid, 6611 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 20:04:31,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 649 states. [2022-01-31 20:04:32,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 649 to 556. [2022-01-31 20:04:32,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 422 states have (on average 1.0236966824644549) internal successors, (432), 428 states have internal predecessors, (432), 107 states have call successors, (107), 27 states have call predecessors, (107), 26 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 20:04:32,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 645 transitions. [2022-01-31 20:04:32,167 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 645 transitions. Word has length 208 [2022-01-31 20:04:32,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:32,167 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 645 transitions. [2022-01-31 20:04:32,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.380952380952381) internal successors, (100), 41 states have internal predecessors, (100), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:04:32,167 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 645 transitions. [2022-01-31 20:04:32,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2022-01-31 20:04:32,168 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:32,168 INFO L514 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 18, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:32,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2022-01-31 20:04:32,168 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:32,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:32,168 INFO L85 PathProgramCache]: Analyzing trace with hash -2061823511, now seen corresponding path program 130 times [2022-01-31 20:04:32,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:32,169 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1194626716] [2022-01-31 20:04:32,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:32,169 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:32,173 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:32,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:33,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,235 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:33,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:33,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:04:33,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:04:33,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:04:33,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:04:33,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,241 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:04:33,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,242 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:04:33,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,243 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:04:33,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,244 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:04:33,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,245 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:04:33,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,246 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:04:33,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,247 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:04:33,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,249 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:04:33,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,250 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:04:33,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,251 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:04:33,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,252 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:04:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,253 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:04:33,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,254 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:04:33,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,255 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:04:33,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:33,275 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:33,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1194626716] [2022-01-31 20:04:33,275 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1194626716] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:33,275 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:33,275 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:04:33,275 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124777947] [2022-01-31 20:04:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:33,276 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:04:33,276 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:04:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=1978, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:04:33,276 INFO L87 Difference]: Start difference. First operand 556 states and 645 transitions. Second operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:04:38,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:38,794 INFO L93 Difference]: Finished difference Result 636 states and 740 transitions. [2022-01-31 20:04:38,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:04:38,795 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) Word has length 206 [2022-01-31 20:04:38,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:38,796 INFO L225 Difference]: With dead ends: 636 [2022-01-31 20:04:38,796 INFO L226 Difference]: Without dead ends: 634 [2022-01-31 20:04:38,797 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1937 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=427, Invalid=11129, Unknown=0, NotChecked=0, Total=11556 [2022-01-31 20:04:38,797 INFO L933 BasicCegarLoop]: 104 mSDtfsCounter, 184 mSDsluCounter, 188 mSDsCounter, 0 mSdLazyCounter, 10862 mSolverCounterSat, 213 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 292 SdHoareTripleChecker+Invalid, 11075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 213 IncrementalHoareTripleChecker+Valid, 10862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:38,797 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [187 Valid, 292 Invalid, 11075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [213 Valid, 10862 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 20:04:38,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 634 states. [2022-01-31 20:04:39,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 634 to 487. [2022-01-31 20:04:39,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 20:04:39,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 20:04:39,462 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 206 [2022-01-31 20:04:39,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:39,462 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 20:04:39,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 20 states have call successors, (23), 3 states have call predecessors, (23), 1 states have return successors, (21), 19 states have call predecessors, (21), 19 states have call successors, (21) [2022-01-31 20:04:39,462 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 20:04:39,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2022-01-31 20:04:39,463 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:39,463 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:39,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2022-01-31 20:04:39,464 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:39,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:39,464 INFO L85 PathProgramCache]: Analyzing trace with hash -1554248287, now seen corresponding path program 131 times [2022-01-31 20:04:39,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:39,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1599821983] [2022-01-31 20:04:39,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:39,464 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:39,468 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:39,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:41,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,102 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:41,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:04:41,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:04:41,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:04:41,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:04:41,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:04:41,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:04:41,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:04:41,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:04:41,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:04:41,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,146 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:04:41,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:04:41,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:04:41,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:04:41,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:04:41,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:04:41,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:04:41,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:04:41,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:04:41,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:04:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:41,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:41,160 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:41,160 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1599821983] [2022-01-31 20:04:41,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1599821983] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:41,160 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:41,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:04:41,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051858735] [2022-01-31 20:04:41,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:41,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:04:41,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:41,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:04:41,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:04:41,161 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 46 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:04:47,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:47,370 INFO L93 Difference]: Finished difference Result 580 states and 671 transitions. [2022-01-31 20:04:47,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-01-31 20:04:47,371 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 208 [2022-01-31 20:04:47,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:47,372 INFO L225 Difference]: With dead ends: 580 [2022-01-31 20:04:47,372 INFO L226 Difference]: Without dead ends: 578 [2022-01-31 20:04:47,373 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2110 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=525, Invalid=11247, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:04:47,373 INFO L933 BasicCegarLoop]: 90 mSDtfsCounter, 141 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 9204 mSolverCounterSat, 201 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 272 SdHoareTripleChecker+Invalid, 9405 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 201 IncrementalHoareTripleChecker+Valid, 9204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:47,373 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [144 Valid, 272 Invalid, 9405 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [201 Valid, 9204 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 20:04:47,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2022-01-31 20:04:48,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 487. [2022-01-31 20:04:48,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 20:04:48,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 20:04:48,043 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 208 [2022-01-31 20:04:48,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:48,044 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 20:04:48,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3333333333333335) internal successors, (105), 44 states have internal predecessors, (105), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:04:48,044 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 20:04:48,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 20:04:48,045 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:48,045 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:48,045 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2022-01-31 20:04:48,045 INFO L402 AbstractCegarLoop]: === Iteration 136 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:48,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:48,045 INFO L85 PathProgramCache]: Analyzing trace with hash 228208601, now seen corresponding path program 132 times [2022-01-31 20:04:48,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:48,045 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [308568035] [2022-01-31 20:04:48,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:48,045 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:48,049 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:48,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,211 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:49,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,212 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:49,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:49,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:04:49,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,215 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:04:49,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:04:49,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:04:49,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:04:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:04:49,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,220 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:04:49,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:04:49,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:04:49,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:04:49,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:04:49,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:04:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,227 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:04:49,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:04:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:04:49,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:04:49,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:04:49,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:04:49,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:04:49,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:04:49,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:49,236 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:49,236 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [308568035] [2022-01-31 20:04:49,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [308568035] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:49,236 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:49,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:04:49,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124943806] [2022-01-31 20:04:49,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:49,236 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:04:49,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:49,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:04:49,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:04:49,237 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 42 states have internal predecessors, (102), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:04:54,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:04:54,298 INFO L93 Difference]: Finished difference Result 528 states and 606 transitions. [2022-01-31 20:04:54,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2022-01-31 20:04:54,298 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 42 states have internal predecessors, (102), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 210 [2022-01-31 20:04:54,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:04:54,299 INFO L225 Difference]: With dead ends: 528 [2022-01-31 20:04:54,299 INFO L226 Difference]: Without dead ends: 526 [2022-01-31 20:04:54,300 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1936 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=492, Invalid=10220, Unknown=0, NotChecked=0, Total=10712 [2022-01-31 20:04:54,300 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 109 mSDsluCounter, 167 mSDsCounter, 0 mSdLazyCounter, 7176 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 112 SdHoareTripleChecker+Valid, 242 SdHoareTripleChecker+Invalid, 7344 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 7176 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:04:54,300 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [112 Valid, 242 Invalid, 7344 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 7176 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:04:54,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2022-01-31 20:04:54,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 487. [2022-01-31 20:04:54,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 370 states have (on average 1.0243243243243243) internal successors, (379), 375 states have internal predecessors, (379), 90 states have call successors, (90), 27 states have call predecessors, (90), 26 states have return successors, (89), 84 states have call predecessors, (89), 89 states have call successors, (89) [2022-01-31 20:04:54,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 558 transitions. [2022-01-31 20:04:54,978 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 558 transitions. Word has length 210 [2022-01-31 20:04:54,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:04:54,978 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 558 transitions. [2022-01-31 20:04:54,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.372093023255814) internal successors, (102), 42 states have internal predecessors, (102), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:04:54,978 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 558 transitions. [2022-01-31 20:04:54,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2022-01-31 20:04:54,979 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:04:54,979 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:04:54,979 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2022-01-31 20:04:54,979 INFO L402 AbstractCegarLoop]: === Iteration 137 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:04:54,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:04:54,979 INFO L85 PathProgramCache]: Analyzing trace with hash 1192260479, now seen corresponding path program 133 times [2022-01-31 20:04:54,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:04:54,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2128571141] [2022-01-31 20:04:54,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:04:54,980 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:04:54,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:04:55,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,688 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:04:56,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,690 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:04:56,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,691 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:04:56,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,692 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:04:56,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,693 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:04:56,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,695 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:04:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,696 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:04:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,697 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:04:56,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,699 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:04:56,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,700 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:04:56,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,701 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:04:56,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,703 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:04:56,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,704 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:04:56,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,705 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:04:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,707 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:04:56,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,708 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:04:56,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,710 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:04:56,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,711 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:04:56,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:04:56,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,714 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:04:56,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,716 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:04:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:04:56,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:04:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:04:56,719 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:04:56,719 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2128571141] [2022-01-31 20:04:56,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2128571141] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:04:56,720 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:04:56,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:04:56,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679660034] [2022-01-31 20:04:56,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:04:56,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:04:56,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:04:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:04:56,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:04:56,721 INFO L87 Difference]: Start difference. First operand 487 states and 558 transitions. Second operand has 47 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 45 states have internal predecessors, (107), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:05:03,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:03,746 INFO L93 Difference]: Finished difference Result 517 states and 591 transitions. [2022-01-31 20:05:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:05:03,747 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 45 states have internal predecessors, (107), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 210 [2022-01-31 20:05:03,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:03,748 INFO L225 Difference]: With dead ends: 517 [2022-01-31 20:05:03,748 INFO L226 Difference]: Without dead ends: 515 [2022-01-31 20:05:03,748 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2173 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=537, Invalid=11673, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:05:03,749 INFO L933 BasicCegarLoop]: 95 mSDtfsCounter, 153 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 10481 mSolverCounterSat, 214 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 156 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 10695 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 214 IncrementalHoareTripleChecker+Valid, 10481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:03,749 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [156 Valid, 291 Invalid, 10695 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [214 Valid, 10481 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 20:05:03,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 515 states. [2022-01-31 20:05:04,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 515 to 412. [2022-01-31 20:05:04,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 412 states, 314 states have (on average 1.0286624203821657) internal successors, (323), 318 states have internal predecessors, (323), 71 states have call successors, (71), 27 states have call predecessors, (71), 26 states have return successors, (70), 66 states have call predecessors, (70), 70 states have call successors, (70) [2022-01-31 20:05:04,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 412 states to 412 states and 464 transitions. [2022-01-31 20:05:04,286 INFO L78 Accepts]: Start accepts. Automaton has 412 states and 464 transitions. Word has length 210 [2022-01-31 20:05:04,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:04,286 INFO L470 AbstractCegarLoop]: Abstraction has 412 states and 464 transitions. [2022-01-31 20:05:04,286 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.3260869565217392) internal successors, (107), 45 states have internal predecessors, (107), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:05:04,286 INFO L276 IsEmpty]: Start isEmpty. Operand 412 states and 464 transitions. [2022-01-31 20:05:04,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 20:05:04,287 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:04,287 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:04,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2022-01-31 20:05:04,287 INFO L402 AbstractCegarLoop]: === Iteration 138 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:04,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:04,287 INFO L85 PathProgramCache]: Analyzing trace with hash -1781754313, now seen corresponding path program 134 times [2022-01-31 20:05:04,287 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:04,287 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1427788358] [2022-01-31 20:05:04,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:04,287 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:04,291 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:04,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:05,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:05,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:05:05,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:05:05,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:05:05,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:05:05,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,626 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:05:05,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:05:05,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:05:05,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:05:05,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:05:05,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:05:05,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:05:05,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:05:05,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:05:05,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:05:05,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:05:05,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:05:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:05:05,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:05:05,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,643 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:05:05,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 20:05:05,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:05,646 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:05,646 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:05,646 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1427788358] [2022-01-31 20:05:05,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1427788358] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:05,646 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:05,647 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:05:05,647 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060268105] [2022-01-31 20:05:05,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:05,647 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:05:05,647 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:05,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:05:05,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:05:05,647 INFO L87 Difference]: Start difference. First operand 412 states and 464 transitions. Second operand has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 43 states have internal predecessors, (104), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:05:11,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:11,489 INFO L93 Difference]: Finished difference Result 508 states and 581 transitions. [2022-01-31 20:05:11,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:05:11,489 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 43 states have internal predecessors, (104), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 212 [2022-01-31 20:05:11,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:11,491 INFO L225 Difference]: With dead ends: 508 [2022-01-31 20:05:11,491 INFO L226 Difference]: Without dead ends: 506 [2022-01-31 20:05:11,491 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1994 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=479, Invalid=10651, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:05:11,492 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 121 mSDsluCounter, 169 mSDsCounter, 0 mSdLazyCounter, 7723 mSolverCounterSat, 168 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 124 SdHoareTripleChecker+Valid, 249 SdHoareTripleChecker+Invalid, 7891 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 168 IncrementalHoareTripleChecker+Valid, 7723 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:11,492 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [124 Valid, 249 Invalid, 7891 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [168 Valid, 7723 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 20:05:11,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2022-01-31 20:05:12,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 499. [2022-01-31 20:05:12,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 379 states have (on average 1.0237467018469657) internal successors, (388), 384 states have internal predecessors, (388), 92 states have call successors, (92), 28 states have call predecessors, (92), 27 states have return successors, (91), 86 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 20:05:12,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 571 transitions. [2022-01-31 20:05:12,199 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 571 transitions. Word has length 212 [2022-01-31 20:05:12,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:12,199 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 571 transitions. [2022-01-31 20:05:12,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3636363636363638) internal successors, (104), 43 states have internal predecessors, (104), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:05:12,199 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 571 transitions. [2022-01-31 20:05:12,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 20:05:12,200 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:12,200 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:12,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2022-01-31 20:05:12,200 INFO L402 AbstractCegarLoop]: === Iteration 139 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:12,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:12,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1780195183, now seen corresponding path program 135 times [2022-01-31 20:05:12,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:12,200 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1970538462] [2022-01-31 20:05:12,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:12,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:12,205 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:12,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:14,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:14,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,032 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:05:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:05:14,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:05:14,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:05:14,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,036 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:05:14,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:05:14,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,039 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:05:14,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:05:14,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,041 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:05:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,042 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:05:14,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,043 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:05:14,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,044 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:05:14,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,045 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:05:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,059 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:05:14,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,075 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:05:14,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,077 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:05:14,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,078 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:05:14,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,079 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:05:14,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,080 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:05:14,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,082 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:05:14,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,083 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:05:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:14,085 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:14,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1970538462] [2022-01-31 20:05:14,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1970538462] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:14,085 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:14,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [43] imperfect sequences [] total 43 [2022-01-31 20:05:14,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009291876] [2022-01-31 20:05:14,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:14,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-01-31 20:05:14,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:14,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-01-31 20:05:14,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=1718, Unknown=0, NotChecked=0, Total=1806 [2022-01-31 20:05:14,086 INFO L87 Difference]: Start difference. First operand 499 states and 571 transitions. Second operand has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:05:18,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:19,000 INFO L93 Difference]: Finished difference Result 598 states and 692 transitions. [2022-01-31 20:05:19,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2022-01-31 20:05:19,000 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 214 [2022-01-31 20:05:19,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:19,001 INFO L225 Difference]: With dead ends: 598 [2022-01-31 20:05:19,001 INFO L226 Difference]: Without dead ends: 596 [2022-01-31 20:05:19,002 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1544 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=431, Invalid=8689, Unknown=0, NotChecked=0, Total=9120 [2022-01-31 20:05:19,002 INFO L933 BasicCegarLoop]: 63 mSDtfsCounter, 110 mSDsluCounter, 158 mSDsCounter, 0 mSdLazyCounter, 5745 mSolverCounterSat, 156 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 221 SdHoareTripleChecker+Invalid, 5901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 156 IncrementalHoareTripleChecker+Valid, 5745 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:19,002 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [113 Valid, 221 Invalid, 5901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [156 Valid, 5745 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2022-01-31 20:05:19,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 596 states. [2022-01-31 20:05:19,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 596 to 558. [2022-01-31 20:05:19,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 558 states, 423 states have (on average 1.0212765957446808) internal successors, (432), 429 states have internal predecessors, (432), 107 states have call successors, (107), 28 states have call predecessors, (107), 27 states have return successors, (106), 100 states have call predecessors, (106), 106 states have call successors, (106) [2022-01-31 20:05:19,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 558 states to 558 states and 645 transitions. [2022-01-31 20:05:19,819 INFO L78 Accepts]: Start accepts. Automaton has 558 states and 645 transitions. Word has length 214 [2022-01-31 20:05:19,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:19,819 INFO L470 AbstractCegarLoop]: Abstraction has 558 states and 645 transitions. [2022-01-31 20:05:19,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.4047619047619047) internal successors, (101), 41 states have internal predecessors, (101), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:05:19,820 INFO L276 IsEmpty]: Start isEmpty. Operand 558 states and 645 transitions. [2022-01-31 20:05:19,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2022-01-31 20:05:19,821 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:19,821 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:19,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2022-01-31 20:05:19,821 INFO L402 AbstractCegarLoop]: === Iteration 140 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:19,821 INFO L85 PathProgramCache]: Analyzing trace with hash -817702435, now seen corresponding path program 136 times [2022-01-31 20:05:19,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:19,821 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [756223541] [2022-01-31 20:05:19,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:19,821 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:19,825 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:19,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,857 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:20,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,859 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:20,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,860 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:05:20,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,861 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:05:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,862 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:05:20,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,863 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:05:20,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,864 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:05:20,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,865 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:05:20,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,867 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:05:20,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,868 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:05:20,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,869 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:05:20,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,870 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:05:20,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,871 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:05:20,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,872 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:05:20,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,873 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:05:20,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,874 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:05:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,875 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:05:20,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,876 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:05:20,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,877 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:05:20,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,878 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:05:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 20:05:20,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:20,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:20,881 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:20,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [756223541] [2022-01-31 20:05:20,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [756223541] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:20,881 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:20,881 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:05:20,881 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937451090] [2022-01-31 20:05:20,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:20,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:05:20,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:20,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:05:20,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:05:20,882 INFO L87 Difference]: Start difference. First operand 558 states and 645 transitions. Second operand has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 46 states have internal predecessors, (109), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:05:27,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:27,090 INFO L93 Difference]: Finished difference Result 686 states and 801 transitions. [2022-01-31 20:05:27,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 20:05:27,090 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 46 states have internal predecessors, (109), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 212 [2022-01-31 20:05:27,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:27,091 INFO L225 Difference]: With dead ends: 686 [2022-01-31 20:05:27,091 INFO L226 Difference]: Without dead ends: 684 [2022-01-31 20:05:27,092 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2792 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=609, Invalid=13911, Unknown=0, NotChecked=0, Total=14520 [2022-01-31 20:05:27,092 INFO L933 BasicCegarLoop]: 99 mSDtfsCounter, 167 mSDsluCounter, 190 mSDsCounter, 0 mSdLazyCounter, 10646 mSolverCounterSat, 239 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 170 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 10885 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 239 IncrementalHoareTripleChecker+Valid, 10646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:27,093 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [170 Valid, 289 Invalid, 10885 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [239 Valid, 10646 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:05:27,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 684 states. [2022-01-31 20:05:28,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 684 to 627. [2022-01-31 20:05:28,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 475 states have (on average 1.0210526315789474) internal successors, (485), 482 states have internal predecessors, (485), 124 states have call successors, (124), 28 states have call predecessors, (124), 27 states have return successors, (123), 116 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 20:05:28,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 732 transitions. [2022-01-31 20:05:28,090 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 732 transitions. Word has length 212 [2022-01-31 20:05:28,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:28,090 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 732 transitions. [2022-01-31 20:05:28,090 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3191489361702127) internal successors, (109), 46 states have internal predecessors, (109), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:05:28,090 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 732 transitions. [2022-01-31 20:05:28,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 20:05:28,091 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:28,091 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:28,091 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2022-01-31 20:05:28,091 INFO L402 AbstractCegarLoop]: === Iteration 141 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:28,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:28,092 INFO L85 PathProgramCache]: Analyzing trace with hash -620831467, now seen corresponding path program 137 times [2022-01-31 20:05:28,092 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:28,092 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1668281293] [2022-01-31 20:05:28,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:28,092 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:28,096 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:28,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,715 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:29,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:29,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,717 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,718 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:05:29,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,719 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:05:29,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,720 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:05:29,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,721 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:05:29,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,723 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:05:29,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,724 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:05:29,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,733 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:05:29,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,735 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:05:29,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,737 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:05:29,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,738 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:05:29,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,739 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:05:29,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,741 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:05:29,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,742 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:05:29,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,743 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:05:29,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,744 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:05:29,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,745 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:05:29,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,747 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:05:29,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,748 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:05:29,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,749 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:05:29,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,750 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:05:29,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:29,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:29,752 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:29,752 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1668281293] [2022-01-31 20:05:29,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1668281293] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:29,753 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:29,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:05:29,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296864131] [2022-01-31 20:05:29,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:29,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:05:29,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:29,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:05:29,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:05:29,753 INFO L87 Difference]: Start difference. First operand 627 states and 732 transitions. Second operand has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:05:36,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:36,684 INFO L93 Difference]: Finished difference Result 722 states and 848 transitions. [2022-01-31 20:05:36,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:05:36,684 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 214 [2022-01-31 20:05:36,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:36,686 INFO L225 Difference]: With dead ends: 722 [2022-01-31 20:05:36,686 INFO L226 Difference]: Without dead ends: 720 [2022-01-31 20:05:36,687 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2180 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=503, Invalid=11487, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:05:36,687 INFO L933 BasicCegarLoop]: 85 mSDtfsCounter, 132 mSDsluCounter, 179 mSDsCounter, 0 mSdLazyCounter, 8665 mSolverCounterSat, 180 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 264 SdHoareTripleChecker+Invalid, 8845 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 180 IncrementalHoareTripleChecker+Valid, 8665 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:36,687 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [135 Valid, 264 Invalid, 8845 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [180 Valid, 8665 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:05:36,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 720 states. [2022-01-31 20:05:37,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 720 to 627. [2022-01-31 20:05:37,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 627 states, 475 states have (on average 1.0210526315789474) internal successors, (485), 482 states have internal predecessors, (485), 124 states have call successors, (124), 28 states have call predecessors, (124), 27 states have return successors, (123), 116 states have call predecessors, (123), 123 states have call successors, (123) [2022-01-31 20:05:37,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 627 states to 627 states and 732 transitions. [2022-01-31 20:05:37,667 INFO L78 Accepts]: Start accepts. Automaton has 627 states and 732 transitions. Word has length 214 [2022-01-31 20:05:37,667 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:37,668 INFO L470 AbstractCegarLoop]: Abstraction has 627 states and 732 transitions. [2022-01-31 20:05:37,668 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3555555555555556) internal successors, (106), 44 states have internal predecessors, (106), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:05:37,668 INFO L276 IsEmpty]: Start isEmpty. Operand 627 states and 732 transitions. [2022-01-31 20:05:37,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 20:05:37,669 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:37,669 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:37,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2022-01-31 20:05:37,669 INFO L402 AbstractCegarLoop]: === Iteration 142 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash 735553229, now seen corresponding path program 138 times [2022-01-31 20:05:37,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:37,669 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1151054600] [2022-01-31 20:05:37,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:37,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:37,674 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:37,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,591 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:39,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,593 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:39,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:39,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,595 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:05:39,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:05:39,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:05:39,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:05:39,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:05:39,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:05:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:05:39,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:05:39,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:05:39,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,610 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:05:39,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,611 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:05:39,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,612 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:05:39,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:05:39,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:05:39,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:05:39,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:05:39,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:05:39,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:05:39,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:05:39,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:05:39,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:05:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:39,627 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:39,627 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:39,627 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1151054600] [2022-01-31 20:05:39,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1151054600] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:39,628 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:39,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [44] imperfect sequences [] total 44 [2022-01-31 20:05:39,628 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064784815] [2022-01-31 20:05:39,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:39,628 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-01-31 20:05:39,628 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:39,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-01-31 20:05:39,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1803, Unknown=0, NotChecked=0, Total=1892 [2022-01-31 20:05:39,628 INFO L87 Difference]: Start difference. First operand 627 states and 732 transitions. Second operand has 44 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:05:45,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:45,166 INFO L93 Difference]: Finished difference Result 667 states and 779 transitions. [2022-01-31 20:05:45,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2022-01-31 20:05:45,166 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 216 [2022-01-31 20:05:45,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:45,167 INFO L225 Difference]: With dead ends: 667 [2022-01-31 20:05:45,167 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 20:05:45,168 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1710 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=454, Invalid=9446, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:05:45,168 INFO L933 BasicCegarLoop]: 70 mSDtfsCounter, 95 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 6711 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 98 SdHoareTripleChecker+Valid, 234 SdHoareTripleChecker+Invalid, 6859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 6711 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:45,168 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [98 Valid, 234 Invalid, 6859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 6711 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2022-01-31 20:05:45,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 20:05:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 568. [2022-01-31 20:05:46,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 431 states have (on average 1.023201856148492) internal successors, (441), 437 states have internal predecessors, (441), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:05:46,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 658 transitions. [2022-01-31 20:05:46,061 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 658 transitions. Word has length 216 [2022-01-31 20:05:46,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:46,062 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 658 transitions. [2022-01-31 20:05:46,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 43 states have (on average 2.395348837209302) internal successors, (103), 42 states have internal predecessors, (103), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:05:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 658 transitions. [2022-01-31 20:05:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2022-01-31 20:05:46,063 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:46,063 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:46,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2022-01-31 20:05:46,063 INFO L402 AbstractCegarLoop]: === Iteration 143 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:46,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:46,063 INFO L85 PathProgramCache]: Analyzing trace with hash 343220411, now seen corresponding path program 139 times [2022-01-31 20:05:46,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:46,063 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1546115854] [2022-01-31 20:05:46,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:46,064 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:46,068 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:46,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:47,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:47,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:47,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:05:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:05:47,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:05:47,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:05:47,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:05:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:05:47,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:05:47,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:05:47,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:05:47,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:05:47,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:05:47,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:05:47,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:05:47,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,484 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:05:47,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,485 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:05:47,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:05:47,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,488 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:05:47,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,489 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:05:47,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,491 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:05:47,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:47,493 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:47,493 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:47,493 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1546115854] [2022-01-31 20:05:47,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1546115854] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:47,493 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:47,493 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:05:47,493 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389392072] [2022-01-31 20:05:47,493 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:47,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:05:47,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:47,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:05:47,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2160, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:05:47,494 INFO L87 Difference]: Start difference. First operand 568 states and 658 transitions. Second operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:05:53,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:05:53,816 INFO L93 Difference]: Finished difference Result 725 states and 849 transitions. [2022-01-31 20:05:53,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:05:53,816 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 214 [2022-01-31 20:05:53,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:05:53,817 INFO L225 Difference]: With dead ends: 725 [2022-01-31 20:05:53,818 INFO L226 Difference]: Without dead ends: 723 [2022-01-31 20:05:53,819 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2479 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=591, Invalid=13215, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:05:53,819 INFO L933 BasicCegarLoop]: 105 mSDtfsCounter, 177 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 11532 mSolverCounterSat, 243 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 180 SdHoareTripleChecker+Valid, 301 SdHoareTripleChecker+Invalid, 11775 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 243 IncrementalHoareTripleChecker+Valid, 11532 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:05:53,819 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [180 Valid, 301 Invalid, 11775 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [243 Valid, 11532 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:05:53,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2022-01-31 20:05:54,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 570. [2022-01-31 20:05:54,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 433 states have (on average 1.0254041570438799) internal successors, (444), 439 states have internal predecessors, (444), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:05:54,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 661 transitions. [2022-01-31 20:05:54,664 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 661 transitions. Word has length 214 [2022-01-31 20:05:54,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:05:54,664 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 661 transitions. [2022-01-31 20:05:54,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:05:54,664 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 661 transitions. [2022-01-31 20:05:54,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 20:05:54,674 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:05:54,674 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:05:54,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2022-01-31 20:05:54,674 INFO L402 AbstractCegarLoop]: === Iteration 144 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:05:54,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:05:54,675 INFO L85 PathProgramCache]: Analyzing trace with hash -1665473421, now seen corresponding path program 140 times [2022-01-31 20:05:54,675 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:05:54,675 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [140643161] [2022-01-31 20:05:54,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:05:54,675 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:05:54,679 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:05:54,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,097 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:05:56,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:05:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:05:56,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:05:56,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,101 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:05:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:05:56,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,104 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:05:56,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:05:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:05:56,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:05:56,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:05:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:05:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:05:56,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:05:56,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:05:56,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:05:56,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:05:56,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:05:56,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:05:56,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:05:56,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:05:56,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:05:56,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:05:56,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:05:56,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:05:56,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:05:56,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [140643161] [2022-01-31 20:05:56,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [140643161] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:05:56,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:05:56,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:05:56,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611493350] [2022-01-31 20:05:56,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:05:56,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:05:56,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:05:56,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:05:56,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:05:56,125 INFO L87 Difference]: Start difference. First operand 570 states and 661 transitions. Second operand has 47 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:06:02,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:02,279 INFO L93 Difference]: Finished difference Result 667 states and 779 transitions. [2022-01-31 20:06:02,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:06:02,280 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 216 [2022-01-31 20:06:02,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:02,281 INFO L225 Difference]: With dead ends: 667 [2022-01-31 20:06:02,281 INFO L226 Difference]: Without dead ends: 665 [2022-01-31 20:06:02,282 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2444 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=563, Invalid=12547, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:06:02,282 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 139 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 9193 mSolverCounterSat, 206 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 142 SdHoareTripleChecker+Valid, 270 SdHoareTripleChecker+Invalid, 9399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 206 IncrementalHoareTripleChecker+Valid, 9193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:02,282 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [142 Valid, 270 Invalid, 9399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [206 Valid, 9193 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:06:02,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2022-01-31 20:06:03,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 570. [2022-01-31 20:06:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 433 states have (on average 1.0254041570438799) internal successors, (444), 439 states have internal predecessors, (444), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:06:03,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 661 transitions. [2022-01-31 20:06:03,143 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 661 transitions. Word has length 216 [2022-01-31 20:06:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:03,143 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 661 transitions. [2022-01-31 20:06:03,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.347826086956522) internal successors, (108), 45 states have internal predecessors, (108), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:06:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 661 transitions. [2022-01-31 20:06:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 20:06:03,144 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:03,144 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:03,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2022-01-31 20:06:03,144 INFO L402 AbstractCegarLoop]: === Iteration 145 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:03,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:03,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1856982699, now seen corresponding path program 141 times [2022-01-31 20:06:03,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:03,144 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1930257383] [2022-01-31 20:06:03,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:03,145 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:03,149 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:03,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:04,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,338 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:04,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,339 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:04,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,340 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:06:04,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,341 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:06:04,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,342 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:06:04,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,343 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:06:04,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,344 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:06:04,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,345 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:06:04,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,346 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:06:04,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,349 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:06:04,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,350 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:06:04,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,351 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:06:04,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,352 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:06:04,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,353 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:06:04,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,354 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:06:04,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,356 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:06:04,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,357 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:06:04,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,358 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:06:04,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,359 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:06:04,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,360 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:06:04,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,361 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:06:04,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,362 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:06:04,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,363 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 20:06:04,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:04,365 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:04,365 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:04,365 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1930257383] [2022-01-31 20:06:04,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1930257383] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:04,365 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:04,365 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:06:04,365 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684271423] [2022-01-31 20:06:04,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:04,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:06:04,366 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:04,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:06:04,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:06:04,366 INFO L87 Difference]: Start difference. First operand 570 states and 661 transitions. Second operand has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:06:09,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:09,870 INFO L93 Difference]: Finished difference Result 615 states and 714 transitions. [2022-01-31 20:06:09,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:06:09,870 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 218 [2022-01-31 20:06:09,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:09,872 INFO L225 Difference]: With dead ends: 615 [2022-01-31 20:06:09,872 INFO L226 Difference]: Without dead ends: 613 [2022-01-31 20:06:09,872 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2003 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=498, Invalid=10632, Unknown=0, NotChecked=0, Total=11130 [2022-01-31 20:06:09,874 INFO L933 BasicCegarLoop]: 75 mSDtfsCounter, 107 mSDsluCounter, 170 mSDsCounter, 0 mSdLazyCounter, 7427 mSolverCounterSat, 166 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 245 SdHoareTripleChecker+Invalid, 7593 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 166 IncrementalHoareTripleChecker+Valid, 7427 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:09,874 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [110 Valid, 245 Invalid, 7593 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [166 Valid, 7427 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2022-01-31 20:06:09,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 613 states. [2022-01-31 20:06:10,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 613 to 570. [2022-01-31 20:06:10,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 570 states, 433 states have (on average 1.0254041570438799) internal successors, (444), 439 states have internal predecessors, (444), 109 states have call successors, (109), 28 states have call predecessors, (109), 27 states have return successors, (108), 102 states have call predecessors, (108), 108 states have call successors, (108) [2022-01-31 20:06:10,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 570 states to 570 states and 661 transitions. [2022-01-31 20:06:10,728 INFO L78 Accepts]: Start accepts. Automaton has 570 states and 661 transitions. Word has length 218 [2022-01-31 20:06:10,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:10,728 INFO L470 AbstractCegarLoop]: Abstraction has 570 states and 661 transitions. [2022-01-31 20:06:10,728 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.3863636363636362) internal successors, (105), 43 states have internal predecessors, (105), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:06:10,728 INFO L276 IsEmpty]: Start isEmpty. Operand 570 states and 661 transitions. [2022-01-31 20:06:10,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2022-01-31 20:06:10,729 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:10,729 INFO L514 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 19, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:10,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2022-01-31 20:06:10,729 INFO L402 AbstractCegarLoop]: === Iteration 146 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:10,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:10,730 INFO L85 PathProgramCache]: Analyzing trace with hash -701421543, now seen corresponding path program 142 times [2022-01-31 20:06:10,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:10,730 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1352266476] [2022-01-31 20:06:10,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:10,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:10,734 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:10,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:11,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:11,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:11,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:06:11,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:06:11,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:06:11,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,888 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:06:11,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:06:11,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:06:11,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:06:11,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:06:11,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:06:11,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:06:11,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:06:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:06:11,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:06:11,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:06:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:06:11,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:06:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,919 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:06:11,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,921 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:06:11,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:06:11,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:11,924 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:11,924 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:11,925 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1352266476] [2022-01-31 20:06:11,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1352266476] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:11,925 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:11,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:06:11,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1360489033] [2022-01-31 20:06:11,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:11,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:06:11,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:11,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:06:11,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=2160, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:06:11,926 INFO L87 Difference]: Start difference. First operand 570 states and 661 transitions. Second operand has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:06:18,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:18,122 INFO L93 Difference]: Finished difference Result 643 states and 747 transitions. [2022-01-31 20:06:18,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2022-01-31 20:06:18,123 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) Word has length 216 [2022-01-31 20:06:18,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:18,124 INFO L225 Difference]: With dead ends: 643 [2022-01-31 20:06:18,124 INFO L226 Difference]: Without dead ends: 641 [2022-01-31 20:06:18,124 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2128 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=447, Invalid=12209, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:06:18,125 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 194 mSDsluCounter, 201 mSDsCounter, 0 mSdLazyCounter, 12268 mSolverCounterSat, 224 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 310 SdHoareTripleChecker+Invalid, 12492 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 224 IncrementalHoareTripleChecker+Valid, 12268 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:18,125 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [197 Valid, 310 Invalid, 12492 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [224 Valid, 12268 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 20:06:18,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 641 states. [2022-01-31 20:06:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 641 to 499. [2022-01-31 20:06:18,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 499 states, 379 states have (on average 1.0237467018469657) internal successors, (388), 384 states have internal predecessors, (388), 92 states have call successors, (92), 28 states have call predecessors, (92), 27 states have return successors, (91), 86 states have call predecessors, (91), 91 states have call successors, (91) [2022-01-31 20:06:18,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 499 states to 499 states and 571 transitions. [2022-01-31 20:06:18,844 INFO L78 Accepts]: Start accepts. Automaton has 499 states and 571 transitions. Word has length 216 [2022-01-31 20:06:18,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:18,845 INFO L470 AbstractCegarLoop]: Abstraction has 499 states and 571 transitions. [2022-01-31 20:06:18,845 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.404255319148936) internal successors, (113), 46 states have internal predecessors, (113), 21 states have call successors, (24), 3 states have call predecessors, (24), 1 states have return successors, (22), 20 states have call predecessors, (22), 20 states have call successors, (22) [2022-01-31 20:06:18,845 INFO L276 IsEmpty]: Start isEmpty. Operand 499 states and 571 transitions. [2022-01-31 20:06:18,846 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2022-01-31 20:06:18,846 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:18,846 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:18,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2022-01-31 20:06:18,846 INFO L402 AbstractCegarLoop]: === Iteration 147 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:18,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:18,846 INFO L85 PathProgramCache]: Analyzing trace with hash -544043951, now seen corresponding path program 143 times [2022-01-31 20:06:18,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:18,846 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [474410364] [2022-01-31 20:06:18,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:18,847 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:18,851 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:18,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,172 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:20,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,174 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:20,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,175 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:20,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,176 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:06:20,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,177 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:06:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,178 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:06:20,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,179 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:06:20,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,180 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:06:20,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,181 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:06:20,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,182 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:06:20,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,183 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:06:20,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,185 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:06:20,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,186 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:06:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,187 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:06:20,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,188 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:06:20,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,189 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:06:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,190 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:06:20,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,191 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:06:20,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,192 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:06:20,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,194 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:06:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,195 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:06:20,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,196 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:06:20,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,197 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 20:06:20,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:20,199 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:20,199 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:20,199 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [474410364] [2022-01-31 20:06:20,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [474410364] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:20,199 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:20,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:06:20,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013803007] [2022-01-31 20:06:20,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:20,200 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:06:20,200 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:20,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:06:20,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:06:20,200 INFO L87 Difference]: Start difference. First operand 499 states and 571 transitions. Second operand has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:06:26,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:26,413 INFO L93 Difference]: Finished difference Result 525 states and 599 transitions. [2022-01-31 20:06:26,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 20:06:26,413 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 218 [2022-01-31 20:06:26,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:26,414 INFO L225 Difference]: With dead ends: 525 [2022-01-31 20:06:26,414 INFO L226 Difference]: Without dead ends: 523 [2022-01-31 20:06:26,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2653 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=589, Invalid=13453, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:06:26,415 INFO L933 BasicCegarLoop]: 94 mSDtfsCounter, 151 mSDsluCounter, 195 mSDsCounter, 0 mSdLazyCounter, 10466 mSolverCounterSat, 221 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 154 SdHoareTripleChecker+Valid, 289 SdHoareTripleChecker+Invalid, 10687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 221 IncrementalHoareTripleChecker+Valid, 10466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:26,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [154 Valid, 289 Invalid, 10687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [221 Valid, 10466 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 20:06:26,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 523 states. [2022-01-31 20:06:26,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 523 to 420. [2022-01-31 20:06:26,976 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 420 states, 320 states have (on average 1.028125) internal successors, (329), 324 states have internal predecessors, (329), 72 states have call successors, (72), 28 states have call predecessors, (72), 27 states have return successors, (71), 67 states have call predecessors, (71), 71 states have call successors, (71) [2022-01-31 20:06:26,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 420 states to 420 states and 472 transitions. [2022-01-31 20:06:26,977 INFO L78 Accepts]: Start accepts. Automaton has 420 states and 472 transitions. Word has length 218 [2022-01-31 20:06:26,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:26,977 INFO L470 AbstractCegarLoop]: Abstraction has 420 states and 472 transitions. [2022-01-31 20:06:26,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3404255319148937) internal successors, (110), 46 states have internal predecessors, (110), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:06:26,977 INFO L276 IsEmpty]: Start isEmpty. Operand 420 states and 472 transitions. [2022-01-31 20:06:26,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 20:06:26,978 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:26,978 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:26,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2022-01-31 20:06:26,978 INFO L402 AbstractCegarLoop]: === Iteration 148 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:26,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:26,978 INFO L85 PathProgramCache]: Analyzing trace with hash 1513912073, now seen corresponding path program 144 times [2022-01-31 20:06:26,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:26,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2094790171] [2022-01-31 20:06:26,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:26,979 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:26,983 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:27,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:28,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:28,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:28,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:06:28,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:06:28,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:06:28,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:06:28,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,400 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:06:28,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,401 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:06:28,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,402 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:06:28,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,403 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:06:28,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,404 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:06:28,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,406 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:06:28,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,407 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:06:28,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,408 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:06:28,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,409 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:06:28,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,410 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:06:28,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,411 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:06:28,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,412 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:06:28,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,413 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:06:28,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,415 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:06:28,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,416 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:06:28,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,419 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 20:06:28,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,421 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 20:06:28,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:28,422 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:28,423 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:28,423 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2094790171] [2022-01-31 20:06:28,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2094790171] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:28,423 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:28,423 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:06:28,423 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591537110] [2022-01-31 20:06:28,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:28,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:06:28,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:28,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:06:28,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:06:28,424 INFO L87 Difference]: Start difference. First operand 420 states and 472 transitions. Second operand has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 44 states have internal predecessors, (107), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:06:34,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:34,217 INFO L93 Difference]: Finished difference Result 520 states and 594 transitions. [2022-01-31 20:06:34,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:06:34,218 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 44 states have internal predecessors, (107), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 220 [2022-01-31 20:06:34,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:34,219 INFO L225 Difference]: With dead ends: 520 [2022-01-31 20:06:34,219 INFO L226 Difference]: Without dead ends: 518 [2022-01-31 20:06:34,220 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2189 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=524, Invalid=11466, Unknown=0, NotChecked=0, Total=11990 [2022-01-31 20:06:34,220 INFO L933 BasicCegarLoop]: 80 mSDtfsCounter, 119 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 8282 mSolverCounterSat, 181 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 260 SdHoareTripleChecker+Invalid, 8463 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 181 IncrementalHoareTripleChecker+Valid, 8282 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:34,220 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [122 Valid, 260 Invalid, 8463 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [181 Valid, 8282 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:06:34,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2022-01-31 20:06:35,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 511. [2022-01-31 20:06:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 388 states have (on average 1.0231958762886597) internal successors, (397), 393 states have internal predecessors, (397), 94 states have call successors, (94), 29 states have call predecessors, (94), 28 states have return successors, (93), 88 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 20:06:35,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 584 transitions. [2022-01-31 20:06:35,028 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 584 transitions. Word has length 220 [2022-01-31 20:06:35,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:35,029 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 584 transitions. [2022-01-31 20:06:35,029 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.3777777777777778) internal successors, (107), 44 states have internal predecessors, (107), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:06:35,029 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 584 transitions. [2022-01-31 20:06:35,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 20:06:35,030 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:35,030 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 11, 11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:35,030 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2022-01-31 20:06:35,030 INFO L402 AbstractCegarLoop]: === Iteration 149 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:35,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:35,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1181403201, now seen corresponding path program 145 times [2022-01-31 20:06:35,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:35,030 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1548522567] [2022-01-31 20:06:35,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:35,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:35,034 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,458 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:35,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,459 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:35,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,460 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:35,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,461 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 42 [2022-01-31 20:06:35,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,462 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:06:35,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,463 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:06:35,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,464 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:06:35,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,465 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:06:35,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,466 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:06:35,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,467 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:06:35,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:06:35,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,469 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:06:35,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,470 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:06:35,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,471 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:06:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,472 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:06:35,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,473 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:06:35,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,474 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:06:35,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:06:35,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,476 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:06:35,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,477 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:06:35,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,478 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:06:35,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,479 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:06:35,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,480 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:06:35,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,481 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:06:35,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,482 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 20:06:35,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:35,484 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:35,484 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:35,484 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1548522567] [2022-01-31 20:06:35,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1548522567] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:35,484 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:35,484 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [39] imperfect sequences [] total 39 [2022-01-31 20:06:35,484 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814716195] [2022-01-31 20:06:35,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:35,484 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2022-01-31 20:06:35,484 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:35,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2022-01-31 20:06:35,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=385, Invalid=1097, Unknown=0, NotChecked=0, Total=1482 [2022-01-31 20:06:35,485 INFO L87 Difference]: Start difference. First operand 511 states and 584 transitions. Second operand has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:06:37,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:37,210 INFO L93 Difference]: Finished difference Result 611 states and 706 transitions. [2022-01-31 20:06:37,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2022-01-31 20:06:37,210 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 222 [2022-01-31 20:06:37,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:37,214 INFO L225 Difference]: With dead ends: 611 [2022-01-31 20:06:37,214 INFO L226 Difference]: Without dead ends: 511 [2022-01-31 20:06:37,214 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1122, Invalid=4280, Unknown=0, NotChecked=0, Total=5402 [2022-01-31 20:06:37,214 INFO L933 BasicCegarLoop]: 62 mSDtfsCounter, 261 mSDsluCounter, 37 mSDsCounter, 0 mSdLazyCounter, 955 mSolverCounterSat, 297 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 264 SdHoareTripleChecker+Valid, 99 SdHoareTripleChecker+Invalid, 1252 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 297 IncrementalHoareTripleChecker+Valid, 955 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:37,215 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [264 Valid, 99 Invalid, 1252 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [297 Valid, 955 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2022-01-31 20:06:37,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 511 states. [2022-01-31 20:06:38,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 511 to 511. [2022-01-31 20:06:38,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 388 states have (on average 1.0206185567010309) internal successors, (396), 393 states have internal predecessors, (396), 94 states have call successors, (94), 29 states have call predecessors, (94), 28 states have return successors, (93), 88 states have call predecessors, (93), 93 states have call successors, (93) [2022-01-31 20:06:38,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 583 transitions. [2022-01-31 20:06:38,005 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 583 transitions. Word has length 222 [2022-01-31 20:06:38,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:38,005 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 583 transitions. [2022-01-31 20:06:38,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 38 states have internal predecessors, (104), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:06:38,006 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 583 transitions. [2022-01-31 20:06:38,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2022-01-31 20:06:38,006 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:38,007 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:38,007 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2022-01-31 20:06:38,007 INFO L402 AbstractCegarLoop]: === Iteration 150 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:38,007 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:38,007 INFO L85 PathProgramCache]: Analyzing trace with hash -887114577, now seen corresponding path program 146 times [2022-01-31 20:06:38,007 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:38,007 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [357316157] [2022-01-31 20:06:38,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:38,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:38,012 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:38,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,096 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:39,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:39,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,098 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,099 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:06:39,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,100 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:06:39,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,103 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:06:39,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,105 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:06:39,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,106 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:06:39,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,107 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:06:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,108 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:06:39,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,109 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:06:39,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,110 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:06:39,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,111 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:06:39,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,112 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:06:39,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,113 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:06:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,114 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:06:39,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,115 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:06:39,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,117 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:06:39,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:06:39,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:06:39,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:06:39,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 20:06:39,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 20:06:39,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:39,124 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:39,124 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:39,124 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [357316157] [2022-01-31 20:06:39,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [357316157] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:39,124 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:39,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:06:39,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1198822487] [2022-01-31 20:06:39,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:39,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:06:39,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:39,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:06:39,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:06:39,125 INFO L87 Difference]: Start difference. First operand 511 states and 583 transitions. Second operand has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 47 states have internal predecessors, (112), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:06:45,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:45,384 INFO L93 Difference]: Finished difference Result 625 states and 722 transitions. [2022-01-31 20:06:45,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 20:06:45,384 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 47 states have internal predecessors, (112), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 220 [2022-01-31 20:06:45,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:45,396 INFO L225 Difference]: With dead ends: 625 [2022-01-31 20:06:45,397 INFO L226 Difference]: Without dead ends: 623 [2022-01-31 20:06:45,397 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2797 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=608, Invalid=14154, Unknown=0, NotChecked=0, Total=14762 [2022-01-31 20:06:45,398 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 160 mSDsluCounter, 197 mSDsCounter, 0 mSdLazyCounter, 10985 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 163 SdHoareTripleChecker+Valid, 295 SdHoareTripleChecker+Invalid, 11219 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 10985 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:45,398 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [163 Valid, 295 Invalid, 11219 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 10985 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2022-01-31 20:06:45,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2022-01-31 20:06:46,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 580. [2022-01-31 20:06:46,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 440 states have (on average 1.0204545454545455) internal successors, (449), 446 states have internal predecessors, (449), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:06:46,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 670 transitions. [2022-01-31 20:06:46,365 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 670 transitions. Word has length 220 [2022-01-31 20:06:46,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:46,366 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 670 transitions. [2022-01-31 20:06:46,366 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.3333333333333335) internal successors, (112), 47 states have internal predecessors, (112), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:06:46,366 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 670 transitions. [2022-01-31 20:06:46,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 20:06:46,390 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:46,390 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:46,390 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2022-01-31 20:06:46,390 INFO L402 AbstractCegarLoop]: === Iteration 151 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:46,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:46,390 INFO L85 PathProgramCache]: Analyzing trace with hash -1759445017, now seen corresponding path program 147 times [2022-01-31 20:06:46,390 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:46,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [2076631134] [2022-01-31 20:06:46,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:46,391 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:46,395 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:46,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,009 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:48,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,010 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:48,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,011 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:48,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,012 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:06:48,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,014 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:06:48,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,015 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:06:48,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,017 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:06:48,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,018 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:06:48,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,019 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:06:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,021 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:06:48,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,022 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:06:48,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,023 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:06:48,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,025 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:06:48,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,026 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:06:48,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,027 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:06:48,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,029 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:06:48,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,030 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:06:48,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,031 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:06:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,033 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:06:48,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,034 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:06:48,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,035 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:06:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,037 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:06:48,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,038 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:06:48,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,040 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 20:06:48,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:48,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:48,042 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:48,042 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [2076631134] [2022-01-31 20:06:48,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [2076631134] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:48,042 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:48,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:06:48,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122811190] [2022-01-31 20:06:48,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:48,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:06:48,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:48,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:06:48,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:06:48,043 INFO L87 Difference]: Start difference. First operand 580 states and 670 transitions. Second operand has 47 states, 46 states have (on average 2.369565217391304) internal successors, (109), 45 states have internal predecessors, (109), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:06:53,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:06:53,858 INFO L93 Difference]: Finished difference Result 679 states and 791 transitions. [2022-01-31 20:06:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2022-01-31 20:06:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.369565217391304) internal successors, (109), 45 states have internal predecessors, (109), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 222 [2022-01-31 20:06:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:06:53,860 INFO L225 Difference]: With dead ends: 679 [2022-01-31 20:06:53,860 INFO L226 Difference]: Without dead ends: 677 [2022-01-31 20:06:53,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2318 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=543, Invalid=12113, Unknown=0, NotChecked=0, Total=12656 [2022-01-31 20:06:53,861 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 127 mSDsluCounter, 178 mSDsCounter, 0 mSdLazyCounter, 8601 mSolverCounterSat, 194 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 262 SdHoareTripleChecker+Invalid, 8795 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 8601 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:06:53,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [130 Valid, 262 Invalid, 8795 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 8601 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2022-01-31 20:06:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2022-01-31 20:06:54,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 580. [2022-01-31 20:06:54,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 440 states have (on average 1.0204545454545455) internal successors, (449), 446 states have internal predecessors, (449), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:06:54,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 670 transitions. [2022-01-31 20:06:54,736 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 670 transitions. Word has length 222 [2022-01-31 20:06:54,737 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:06:54,737 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 670 transitions. [2022-01-31 20:06:54,737 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.369565217391304) internal successors, (109), 45 states have internal predecessors, (109), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:06:54,737 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 670 transitions. [2022-01-31 20:06:54,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 20:06:54,738 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:06:54,738 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:06:54,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2022-01-31 20:06:54,738 INFO L402 AbstractCegarLoop]: === Iteration 152 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:06:54,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:06:54,738 INFO L85 PathProgramCache]: Analyzing trace with hash -598699617, now seen corresponding path program 148 times [2022-01-31 20:06:54,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:06:54,738 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1017320786] [2022-01-31 20:06:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:06:54,739 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:06:54,743 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:06:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,374 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:06:56,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,375 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:06:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,376 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:06:56,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,377 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:06:56,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,378 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:06:56,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,379 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:06:56,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,380 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:06:56,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,381 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:06:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,382 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:06:56,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:06:56,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,384 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:06:56,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,385 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:06:56,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,386 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:06:56,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,387 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:06:56,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,388 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:06:56,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,389 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:06:56,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,390 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:06:56,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,392 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:06:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,393 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:06:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,394 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:06:56,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,395 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:06:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:06:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,397 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:06:56,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,398 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:06:56,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,399 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 20:06:56,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:06:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:06:56,401 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:06:56,401 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1017320786] [2022-01-31 20:06:56,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1017320786] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:06:56,402 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:06:56,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [45] imperfect sequences [] total 45 [2022-01-31 20:06:56,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381989022] [2022-01-31 20:06:56,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:06:56,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2022-01-31 20:06:56,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:06:56,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2022-01-31 20:06:56,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1889, Unknown=0, NotChecked=0, Total=1980 [2022-01-31 20:06:56,403 INFO L87 Difference]: Start difference. First operand 580 states and 670 transitions. Second operand has 45 states, 44 states have (on average 2.409090909090909) internal successors, (106), 43 states have internal predecessors, (106), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:07:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:01,788 INFO L93 Difference]: Finished difference Result 624 states and 722 transitions. [2022-01-31 20:07:01,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2022-01-31 20:07:01,790 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 2.409090909090909) internal successors, (106), 43 states have internal predecessors, (106), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 224 [2022-01-31 20:07:01,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:01,791 INFO L225 Difference]: With dead ends: 624 [2022-01-31 20:07:01,791 INFO L226 Difference]: Without dead ends: 622 [2022-01-31 20:07:01,792 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1663 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=442, Invalid=9458, Unknown=0, NotChecked=0, Total=9900 [2022-01-31 20:07:01,792 INFO L933 BasicCegarLoop]: 65 mSDtfsCounter, 112 mSDsluCounter, 171 mSDsCounter, 0 mSdLazyCounter, 6489 mSolverCounterSat, 160 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 236 SdHoareTripleChecker+Invalid, 6649 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 160 IncrementalHoareTripleChecker+Valid, 6489 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:01,792 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 236 Invalid, 6649 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [160 Valid, 6489 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:07:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2022-01-31 20:07:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 580. [2022-01-31 20:07:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 580 states, 440 states have (on average 1.0204545454545455) internal successors, (449), 446 states have internal predecessors, (449), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:07:02,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 580 states to 580 states and 670 transitions. [2022-01-31 20:07:02,669 INFO L78 Accepts]: Start accepts. Automaton has 580 states and 670 transitions. Word has length 224 [2022-01-31 20:07:02,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:02,669 INFO L470 AbstractCegarLoop]: Abstraction has 580 states and 670 transitions. [2022-01-31 20:07:02,669 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 2.409090909090909) internal successors, (106), 43 states have internal predecessors, (106), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:07:02,669 INFO L276 IsEmpty]: Start isEmpty. Operand 580 states and 670 transitions. [2022-01-31 20:07:02,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2022-01-31 20:07:02,670 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:02,670 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:02,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2022-01-31 20:07:02,671 INFO L402 AbstractCegarLoop]: === Iteration 153 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:02,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:02,671 INFO L85 PathProgramCache]: Analyzing trace with hash 134495629, now seen corresponding path program 149 times [2022-01-31 20:07:02,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:02,671 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1261925954] [2022-01-31 20:07:02,671 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:02,671 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:02,675 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:03,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:03,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:03,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:07:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:07:03,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:07:03,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,898 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:07:03,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:07:03,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:07:03,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:07:03,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,902 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:07:03,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:07:03,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:07:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:07:03,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:07:03,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:07:03,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,911 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:07:03,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:07:03,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:07:03,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:07:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:07:03,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:07:03,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 20:07:03,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:03,920 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:03,920 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1261925954] [2022-01-31 20:07:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1261925954] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:03,920 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:03,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:07:03,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2075633248] [2022-01-31 20:07:03,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:03,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:07:03,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:03,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:07:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2349, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:07:03,921 INFO L87 Difference]: Start difference. First operand 580 states and 670 transitions. Second operand has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 48 states have internal predecessors, (114), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:07:10,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:10,742 INFO L93 Difference]: Finished difference Result 726 states and 848 transitions. [2022-01-31 20:07:10,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2022-01-31 20:07:10,742 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 48 states have internal predecessors, (114), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 222 [2022-01-31 20:07:10,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:10,744 INFO L225 Difference]: With dead ends: 726 [2022-01-31 20:07:10,744 INFO L226 Difference]: Without dead ends: 724 [2022-01-31 20:07:10,745 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3021 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=634, Invalid=15116, Unknown=0, NotChecked=0, Total=15750 [2022-01-31 20:07:10,745 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 173 mSDsluCounter, 199 mSDsCounter, 0 mSdLazyCounter, 11680 mSolverCounterSat, 250 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 176 SdHoareTripleChecker+Valid, 302 SdHoareTripleChecker+Invalid, 11930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 250 IncrementalHoareTripleChecker+Valid, 11680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:10,745 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [176 Valid, 302 Invalid, 11930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [250 Valid, 11680 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2022-01-31 20:07:10,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2022-01-31 20:07:11,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 582. [2022-01-31 20:07:11,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 442 states have (on average 1.0226244343891402) internal successors, (452), 448 states have internal predecessors, (452), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:07:11,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 673 transitions. [2022-01-31 20:07:11,640 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 673 transitions. Word has length 222 [2022-01-31 20:07:11,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:11,640 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 673 transitions. [2022-01-31 20:07:11,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.326530612244898) internal successors, (114), 48 states have internal predecessors, (114), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:07:11,640 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 673 transitions. [2022-01-31 20:07:11,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 20:07:11,641 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:11,641 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:11,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2022-01-31 20:07:11,641 INFO L402 AbstractCegarLoop]: === Iteration 154 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:11,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:11,642 INFO L85 PathProgramCache]: Analyzing trace with hash 755419461, now seen corresponding path program 150 times [2022-01-31 20:07:11,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:11,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1821108865] [2022-01-31 20:07:11,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:11,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:11,646 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:11,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:12,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:12,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:12,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,936 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:07:12,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,938 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:07:12,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,939 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:07:12,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,940 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:07:12,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,942 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:07:12,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,943 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:07:12,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,944 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:07:12,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,945 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:07:12,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,946 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:07:12,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,948 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:07:12,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,949 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:07:12,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,950 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:07:12,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,951 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:07:12,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,952 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:07:12,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,953 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:07:12,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,954 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:07:12,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,955 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:07:12,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,956 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:07:12,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,958 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:07:12,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,959 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:07:12,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,960 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 20:07:12,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:12,962 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:12,962 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1821108865] [2022-01-31 20:07:12,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1821108865] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:12,962 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:12,962 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:07:12,962 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775563298] [2022-01-31 20:07:12,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:12,962 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:07:12,962 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:12,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:07:12,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:07:12,963 INFO L87 Difference]: Start difference. First operand 582 states and 673 transitions. Second operand has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:07:19,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:19,482 INFO L93 Difference]: Finished difference Result 682 states and 795 transitions. [2022-01-31 20:07:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2022-01-31 20:07:19,482 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 224 [2022-01-31 20:07:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:19,483 INFO L225 Difference]: With dead ends: 682 [2022-01-31 20:07:19,484 INFO L226 Difference]: Without dead ends: 680 [2022-01-31 20:07:19,484 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2519 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=569, Invalid=13003, Unknown=0, NotChecked=0, Total=13572 [2022-01-31 20:07:19,485 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 138 mSDsluCounter, 184 mSDsCounter, 0 mSdLazyCounter, 9467 mSolverCounterSat, 208 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 141 SdHoareTripleChecker+Valid, 273 SdHoareTripleChecker+Invalid, 9675 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 208 IncrementalHoareTripleChecker+Valid, 9467 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:19,485 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [141 Valid, 273 Invalid, 9675 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [208 Valid, 9467 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2022-01-31 20:07:19,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2022-01-31 20:07:20,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 582. [2022-01-31 20:07:20,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 442 states have (on average 1.0226244343891402) internal successors, (452), 448 states have internal predecessors, (452), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:07:20,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 673 transitions. [2022-01-31 20:07:20,442 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 673 transitions. Word has length 224 [2022-01-31 20:07:20,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:20,443 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 673 transitions. [2022-01-31 20:07:20,443 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.3617021276595747) internal successors, (111), 46 states have internal predecessors, (111), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:07:20,443 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 673 transitions. [2022-01-31 20:07:20,444 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 20:07:20,444 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:20,444 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:20,444 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2022-01-31 20:07:20,444 INFO L402 AbstractCegarLoop]: === Iteration 155 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:20,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:20,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1880523907, now seen corresponding path program 151 times [2022-01-31 20:07:20,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:20,444 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1145814081] [2022-01-31 20:07:20,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:20,445 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:20,449 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:20,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,614 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:21,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,615 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:21,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,616 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:21,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,617 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:07:21,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,618 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:07:21,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:07:21,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:07:21,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:07:21,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:07:21,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,623 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:07:21,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:07:21,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:07:21,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:07:21,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:07:21,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:07:21,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:07:21,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:07:21,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,635 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:07:21,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:07:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:07:21,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:07:21,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:07:21,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:07:21,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 20:07:21,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-01-31 20:07:21,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:21,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:21,644 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:21,644 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1145814081] [2022-01-31 20:07:21,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1145814081] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:21,644 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:21,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:07:21,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435946705] [2022-01-31 20:07:21,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:21,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:07:21,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:21,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:07:21,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:07:21,645 INFO L87 Difference]: Start difference. First operand 582 states and 673 transitions. Second operand has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:07:26,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:26,796 INFO L93 Difference]: Finished difference Result 630 states and 730 transitions. [2022-01-31 20:07:26,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-01-31 20:07:26,796 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 226 [2022-01-31 20:07:26,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:26,797 INFO L225 Difference]: With dead ends: 630 [2022-01-31 20:07:26,797 INFO L226 Difference]: Without dead ends: 628 [2022-01-31 20:07:26,798 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2008 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=497, Invalid=10845, Unknown=0, NotChecked=0, Total=11342 [2022-01-31 20:07:26,798 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 102 mSDsluCounter, 177 mSDsCounter, 0 mSdLazyCounter, 7716 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 251 SdHoareTripleChecker+Invalid, 7879 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 7716 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:26,798 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [105 Valid, 251 Invalid, 7879 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 7716 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:07:26,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 628 states. [2022-01-31 20:07:27,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 628 to 582. [2022-01-31 20:07:27,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 582 states, 442 states have (on average 1.0226244343891402) internal successors, (452), 448 states have internal predecessors, (452), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:07:27,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 582 states to 582 states and 673 transitions. [2022-01-31 20:07:27,705 INFO L78 Accepts]: Start accepts. Automaton has 582 states and 673 transitions. Word has length 226 [2022-01-31 20:07:27,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:27,706 INFO L470 AbstractCegarLoop]: Abstraction has 582 states and 673 transitions. [2022-01-31 20:07:27,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.4) internal successors, (108), 44 states have internal predecessors, (108), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:07:27,706 INFO L276 IsEmpty]: Start isEmpty. Operand 582 states and 673 transitions. [2022-01-31 20:07:27,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2022-01-31 20:07:27,707 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:27,707 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:27,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2022-01-31 20:07:27,707 INFO L402 AbstractCegarLoop]: === Iteration 156 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:27,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:27,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1645607189, now seen corresponding path program 152 times [2022-01-31 20:07:27,707 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:27,707 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1899499723] [2022-01-31 20:07:27,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:27,708 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:27,712 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:27,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,214 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:29,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,216 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:29,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,217 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:29,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,218 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:07:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,219 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:07:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,221 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:07:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,222 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:07:29,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,223 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:07:29,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,224 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:07:29,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,225 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:07:29,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,226 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:07:29,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,228 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:07:29,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,229 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:07:29,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,230 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:07:29,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,231 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:07:29,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,232 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:07:29,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,233 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:07:29,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,234 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:07:29,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,236 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:07:29,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,237 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:07:29,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,238 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:07:29,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,239 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:07:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 20:07:29,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:29,242 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:29,242 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:29,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1899499723] [2022-01-31 20:07:29,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1899499723] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:29,242 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:29,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:07:29,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130874901] [2022-01-31 20:07:29,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:29,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:07:29,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:29,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:07:29,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2350, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:07:29,243 INFO L87 Difference]: Start difference. First operand 582 states and 673 transitions. Second operand has 50 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:07:36,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:36,211 INFO L93 Difference]: Finished difference Result 737 states and 862 transitions. [2022-01-31 20:07:36,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2022-01-31 20:07:36,212 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 224 [2022-01-31 20:07:36,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:36,228 INFO L225 Difference]: With dead ends: 737 [2022-01-31 20:07:36,228 INFO L226 Difference]: Without dead ends: 735 [2022-01-31 20:07:36,229 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2695 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=616, Invalid=14390, Unknown=0, NotChecked=0, Total=15006 [2022-01-31 20:07:36,229 INFO L933 BasicCegarLoop]: 109 mSDtfsCounter, 183 mSDsluCounter, 213 mSDsCounter, 0 mSdLazyCounter, 13054 mSolverCounterSat, 254 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 186 SdHoareTripleChecker+Valid, 322 SdHoareTripleChecker+Invalid, 13308 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 254 IncrementalHoareTripleChecker+Valid, 13054 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:36,229 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [186 Valid, 322 Invalid, 13308 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [254 Valid, 13054 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 20:07:36,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 735 states. [2022-01-31 20:07:37,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 735 to 584. [2022-01-31 20:07:37,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 584 states, 444 states have (on average 1.0247747747747749) internal successors, (455), 450 states have internal predecessors, (455), 111 states have call successors, (111), 29 states have call predecessors, (111), 28 states have return successors, (110), 104 states have call predecessors, (110), 110 states have call successors, (110) [2022-01-31 20:07:37,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 584 states to 584 states and 676 transitions. [2022-01-31 20:07:37,206 INFO L78 Accepts]: Start accepts. Automaton has 584 states and 676 transitions. Word has length 224 [2022-01-31 20:07:37,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:37,206 INFO L470 AbstractCegarLoop]: Abstraction has 584 states and 676 transitions. [2022-01-31 20:07:37,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.36734693877551) internal successors, (116), 48 states have internal predecessors, (116), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:07:37,206 INFO L276 IsEmpty]: Start isEmpty. Operand 584 states and 676 transitions. [2022-01-31 20:07:37,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 20:07:37,208 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:37,208 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 17, 17, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:37,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2022-01-31 20:07:37,208 INFO L402 AbstractCegarLoop]: === Iteration 157 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:37,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:37,208 INFO L85 PathProgramCache]: Analyzing trace with hash -526404829, now seen corresponding path program 153 times [2022-01-31 20:07:37,208 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:37,208 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1149330640] [2022-01-31 20:07:37,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:37,208 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:37,213 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:37,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,762 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,764 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,765 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:38,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,766 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:07:38,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,768 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:07:38,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,769 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:07:38,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,770 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:07:38,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,771 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:07:38,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,773 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:07:38,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,774 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:07:38,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,775 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:07:38,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,777 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:07:38,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,778 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:07:38,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,779 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:07:38,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,780 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:07:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,782 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:07:38,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,783 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:07:38,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,784 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:07:38,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,786 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:07:38,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,787 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:07:38,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,789 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:07:38,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,790 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:07:38,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,791 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 20:07:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,793 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-01-31 20:07:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:38,795 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:38,795 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:38,795 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1149330640] [2022-01-31 20:07:38,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1149330640] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:38,795 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:38,795 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:07:38,795 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793713610] [2022-01-31 20:07:38,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:38,795 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:07:38,795 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:38,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:07:38,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:07:38,796 INFO L87 Difference]: Start difference. First operand 584 states and 676 transitions. Second operand has 49 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:07:45,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:45,412 INFO L93 Difference]: Finished difference Result 616 states and 712 transitions. [2022-01-31 20:07:45,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2022-01-31 20:07:45,413 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 226 [2022-01-31 20:07:45,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:45,414 INFO L225 Difference]: With dead ends: 616 [2022-01-31 20:07:45,414 INFO L226 Difference]: Without dead ends: 614 [2022-01-31 20:07:45,415 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2658 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=588, Invalid=13692, Unknown=0, NotChecked=0, Total=14280 [2022-01-31 20:07:45,415 INFO L933 BasicCegarLoop]: 93 mSDtfsCounter, 145 mSDsluCounter, 198 mSDsCounter, 0 mSdLazyCounter, 10600 mSolverCounterSat, 216 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 148 SdHoareTripleChecker+Valid, 291 SdHoareTripleChecker+Invalid, 10816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 216 IncrementalHoareTripleChecker+Valid, 10600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:45,415 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [148 Valid, 291 Invalid, 10816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [216 Valid, 10600 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2022-01-31 20:07:45,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-31 20:07:46,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 513. [2022-01-31 20:07:46,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 391 states have (on average 1.0281329923273657) internal successors, (402), 396 states have internal predecessors, (402), 93 states have call successors, (93), 29 states have call predecessors, (93), 28 states have return successors, (92), 87 states have call predecessors, (92), 92 states have call successors, (92) [2022-01-31 20:07:46,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 587 transitions. [2022-01-31 20:07:46,184 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 587 transitions. Word has length 226 [2022-01-31 20:07:46,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:46,184 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 587 transitions. [2022-01-31 20:07:46,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.3541666666666665) internal successors, (113), 47 states have internal predecessors, (113), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:07:46,184 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 587 transitions. [2022-01-31 20:07:46,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 20:07:46,185 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:46,185 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 14, 14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:46,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2022-01-31 20:07:46,185 INFO L402 AbstractCegarLoop]: === Iteration 158 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:46,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:46,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1058052645, now seen corresponding path program 154 times [2022-01-31 20:07:46,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:46,186 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [344679163] [2022-01-31 20:07:46,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:46,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:46,191 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:46,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:47,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:47,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:47,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,907 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 48 [2022-01-31 20:07:47,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,908 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:07:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,909 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:07:47,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,910 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:07:47,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,912 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:07:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,913 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:07:47,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,914 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:07:47,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,915 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:07:47,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,916 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:07:47,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,917 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:07:47,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,918 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:07:47,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,922 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:07:47,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,923 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:07:47,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,924 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:07:47,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,926 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:07:47,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,928 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:07:47,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,929 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:07:47,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,930 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:07:47,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,931 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:07:47,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,932 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 20:07:47,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,934 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 20:07:47,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,935 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-01-31 20:07:47,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:47,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:47,937 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:47,937 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [344679163] [2022-01-31 20:07:47,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [344679163] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:47,937 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:47,937 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:07:47,937 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676536715] [2022-01-31 20:07:47,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:47,937 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:07:47,937 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:47,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:07:47,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:07:47,938 INFO L87 Difference]: Start difference. First operand 513 states and 587 transitions. Second operand has 47 states, 46 states have (on average 2.391304347826087) internal successors, (110), 45 states have internal predecessors, (110), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:07:53,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:07:53,859 INFO L93 Difference]: Finished difference Result 616 states and 713 transitions. [2022-01-31 20:07:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-01-31 20:07:53,859 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.391304347826087) internal successors, (110), 45 states have internal predecessors, (110), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 228 [2022-01-31 20:07:53,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:07:53,860 INFO L225 Difference]: With dead ends: 616 [2022-01-31 20:07:53,860 INFO L226 Difference]: Without dead ends: 614 [2022-01-31 20:07:53,861 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2196 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=523, Invalid=11687, Unknown=0, NotChecked=0, Total=12210 [2022-01-31 20:07:53,861 INFO L933 BasicCegarLoop]: 79 mSDtfsCounter, 113 mSDsluCounter, 175 mSDsCounter, 0 mSdLazyCounter, 8128 mSolverCounterSat, 178 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 116 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 8306 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 178 IncrementalHoareTripleChecker+Valid, 8128 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:07:53,861 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [116 Valid, 254 Invalid, 8306 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [178 Valid, 8128 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:07:53,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 614 states. [2022-01-31 20:07:54,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 614 to 608. [2022-01-31 20:07:54,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 462 states have (on average 1.0238095238095237) internal successors, (473), 468 states have internal predecessors, (473), 116 states have call successors, (116), 30 states have call predecessors, (116), 29 states have return successors, (115), 109 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 20:07:54,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 704 transitions. [2022-01-31 20:07:54,926 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 704 transitions. Word has length 228 [2022-01-31 20:07:54,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:07:54,926 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 704 transitions. [2022-01-31 20:07:54,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.391304347826087) internal successors, (110), 45 states have internal predecessors, (110), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:07:54,926 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 704 transitions. [2022-01-31 20:07:54,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2022-01-31 20:07:54,927 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:07:54,927 INFO L514 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 20, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:07:54,927 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2022-01-31 20:07:54,927 INFO L402 AbstractCegarLoop]: === Iteration 159 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:07:54,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:07:54,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1367535817, now seen corresponding path program 155 times [2022-01-31 20:07:54,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:07:54,928 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1038343197] [2022-01-31 20:07:54,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:07:54,928 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:07:54,933 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:07:55,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,981 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:07:55,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,982 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:07:55,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,983 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:07:55,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,984 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:07:55,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,985 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:07:55,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,986 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:07:55,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,987 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:07:55,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,988 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:07:55,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,989 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:07:55,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,990 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:07:55,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,991 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:07:55,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,992 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:07:55,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,993 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:07:55,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,995 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:07:55,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,997 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:07:55,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,998 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:07:55,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:55,999 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:07:56,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,000 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:07:56,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,001 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:07:56,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,003 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:07:56,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,004 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:07:56,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,005 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 20:07:56,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,006 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-01-31 20:07:56,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:07:56,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:07:56,008 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:07:56,008 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1038343197] [2022-01-31 20:07:56,008 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1038343197] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:07:56,008 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:07:56,008 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:07:56,008 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071364650] [2022-01-31 20:07:56,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:07:56,008 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:07:56,008 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:07:56,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:07:56,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=2350, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:07:56,009 INFO L87 Difference]: Start difference. First operand 608 states and 704 transitions. Second operand has 50 states, 49 states have (on average 2.4081632653061225) internal successors, (118), 48 states have internal predecessors, (118), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:08:02,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:02,778 INFO L93 Difference]: Finished difference Result 681 states and 790 transitions. [2022-01-31 20:08:02,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-01-31 20:08:02,778 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.4081632653061225) internal successors, (118), 48 states have internal predecessors, (118), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) Word has length 226 [2022-01-31 20:08:02,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:02,779 INFO L225 Difference]: With dead ends: 681 [2022-01-31 20:08:02,779 INFO L226 Difference]: Without dead ends: 679 [2022-01-31 20:08:02,780 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2328 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=467, Invalid=13339, Unknown=0, NotChecked=0, Total=13806 [2022-01-31 20:08:02,780 INFO L933 BasicCegarLoop]: 113 mSDtfsCounter, 201 mSDsluCounter, 206 mSDsCounter, 0 mSdLazyCounter, 13175 mSolverCounterSat, 234 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 204 SdHoareTripleChecker+Valid, 319 SdHoareTripleChecker+Invalid, 13409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 234 IncrementalHoareTripleChecker+Valid, 13175 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.8s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:02,780 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [204 Valid, 319 Invalid, 13409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [234 Valid, 13175 Invalid, 0 Unknown, 0 Unchecked, 3.8s Time] [2022-01-31 20:08:02,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2022-01-31 20:08:03,806 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 608. [2022-01-31 20:08:03,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 608 states, 462 states have (on average 1.0238095238095237) internal successors, (473), 468 states have internal predecessors, (473), 116 states have call successors, (116), 30 states have call predecessors, (116), 29 states have return successors, (115), 109 states have call predecessors, (115), 115 states have call successors, (115) [2022-01-31 20:08:03,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 608 states to 608 states and 704 transitions. [2022-01-31 20:08:03,807 INFO L78 Accepts]: Start accepts. Automaton has 608 states and 704 transitions. Word has length 226 [2022-01-31 20:08:03,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:03,808 INFO L470 AbstractCegarLoop]: Abstraction has 608 states and 704 transitions. [2022-01-31 20:08:03,808 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.4081632653061225) internal successors, (118), 48 states have internal predecessors, (118), 22 states have call successors, (25), 3 states have call predecessors, (25), 1 states have return successors, (23), 21 states have call predecessors, (23), 21 states have call successors, (23) [2022-01-31 20:08:03,808 INFO L276 IsEmpty]: Start isEmpty. Operand 608 states and 704 transitions. [2022-01-31 20:08:03,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2022-01-31 20:08:03,809 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:03,809 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 18, 18, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:03,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2022-01-31 20:08:03,809 INFO L402 AbstractCegarLoop]: === Iteration 160 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:03,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:03,809 INFO L85 PathProgramCache]: Analyzing trace with hash 296066433, now seen corresponding path program 156 times [2022-01-31 20:08:03,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:03,809 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [752561106] [2022-01-31 20:08:03,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:03,810 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:03,815 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:03,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:05,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:08:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,137 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:08:05,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 56 [2022-01-31 20:08:05,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 64 [2022-01-31 20:08:05,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 72 [2022-01-31 20:08:05,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 80 [2022-01-31 20:08:05,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 88 [2022-01-31 20:08:05,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 96 [2022-01-31 20:08:05,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,144 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 104 [2022-01-31 20:08:05,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,145 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 112 [2022-01-31 20:08:05,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,147 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 120 [2022-01-31 20:08:05,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,148 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 128 [2022-01-31 20:08:05,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,149 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 136 [2022-01-31 20:08:05,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,150 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 144 [2022-01-31 20:08:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,151 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 152 [2022-01-31 20:08:05,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,152 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 160 [2022-01-31 20:08:05,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,153 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 168 [2022-01-31 20:08:05,153 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,154 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 176 [2022-01-31 20:08:05,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,155 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 184 [2022-01-31 20:08:05,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,156 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 192 [2022-01-31 20:08:05,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,157 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 200 [2022-01-31 20:08:05,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,158 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 208 [2022-01-31 20:08:05,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,159 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 216 [2022-01-31 20:08:05,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:05,161 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:08:05,161 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:05,161 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [752561106] [2022-01-31 20:08:05,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [752561106] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:05,161 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:05,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [50] imperfect sequences [] total 50 [2022-01-31 20:08:05,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022966791] [2022-01-31 20:08:05,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:05,161 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2022-01-31 20:08:05,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:05,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2022-01-31 20:08:05,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=2349, Unknown=0, NotChecked=0, Total=2450 [2022-01-31 20:08:05,162 INFO L87 Difference]: Start difference. First operand 608 states and 704 transitions. Second operand has 50 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 48 states have internal predecessors, (115), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:08:12,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:12,766 INFO L93 Difference]: Finished difference Result 719 states and 839 transitions. [2022-01-31 20:08:12,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2022-01-31 20:08:12,766 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 48 states have internal predecessors, (115), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 228 [2022-01-31 20:08:12,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:12,768 INFO L225 Difference]: With dead ends: 719 [2022-01-31 20:08:12,768 INFO L226 Difference]: Without dead ends: 717 [2022-01-31 20:08:12,768 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2876 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=614, Invalid=14638, Unknown=0, NotChecked=0, Total=15252 [2022-01-31 20:08:12,769 INFO L933 BasicCegarLoop]: 98 mSDtfsCounter, 157 mSDsluCounter, 196 mSDsCounter, 0 mSdLazyCounter, 11084 mSolverCounterSat, 232 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 160 SdHoareTripleChecker+Valid, 294 SdHoareTripleChecker+Invalid, 11316 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 232 IncrementalHoareTripleChecker+Valid, 11084 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:12,769 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [160 Valid, 294 Invalid, 11316 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [232 Valid, 11084 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2022-01-31 20:08:12,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 717 states. [2022-01-31 20:08:14,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 717 to 675. [2022-01-31 20:08:14,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 512 states have (on average 1.021484375) internal successors, (523), 519 states have internal predecessors, (523), 133 states have call successors, (133), 30 states have call predecessors, (133), 29 states have return successors, (132), 125 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:08:14,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 788 transitions. [2022-01-31 20:08:14,052 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 788 transitions. Word has length 228 [2022-01-31 20:08:14,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:14,052 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 788 transitions. [2022-01-31 20:08:14,052 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 49 states have (on average 2.3469387755102042) internal successors, (115), 48 states have internal predecessors, (115), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:08:14,052 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 788 transitions. [2022-01-31 20:08:14,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 20:08:14,055 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:14,055 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 15, 15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:14,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2022-01-31 20:08:14,055 INFO L402 AbstractCegarLoop]: === Iteration 161 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:14,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:14,055 INFO L85 PathProgramCache]: Analyzing trace with hash -937152327, now seen corresponding path program 157 times [2022-01-31 20:08:14,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:14,056 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [735621295] [2022-01-31 20:08:14,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:14,056 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:14,061 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:14,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,286 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:15,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,288 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:08:15,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,289 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:08:15,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,290 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 50 [2022-01-31 20:08:15,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,291 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:08:15,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,292 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:08:15,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,293 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:08:15,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,294 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:08:15,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,295 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:08:15,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,296 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:08:15,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,297 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:08:15,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,298 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:08:15,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,299 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:08:15,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,300 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:08:15,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,302 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:08:15,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,303 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:08:15,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,304 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:08:15,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,305 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:08:15,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,306 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:08:15,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,307 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:08:15,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,308 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:08:15,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,309 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:08:15,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,310 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:08:15,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,312 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 20:08:15,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,313 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-01-31 20:08:15,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:08:15,315 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:15,315 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [735621295] [2022-01-31 20:08:15,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [735621295] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:15,315 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:15,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [48] imperfect sequences [] total 48 [2022-01-31 20:08:15,315 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453150053] [2022-01-31 20:08:15,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:15,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2022-01-31 20:08:15,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:15,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2022-01-31 20:08:15,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=2159, Unknown=0, NotChecked=0, Total=2256 [2022-01-31 20:08:15,316 INFO L87 Difference]: Start difference. First operand 675 states and 788 transitions. Second operand has 48 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:08:21,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:21,628 INFO L93 Difference]: Finished difference Result 778 states and 914 transitions. [2022-01-31 20:08:21,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2022-01-31 20:08:21,628 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 230 [2022-01-31 20:08:21,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:21,629 INFO L225 Difference]: With dead ends: 778 [2022-01-31 20:08:21,629 INFO L226 Difference]: Without dead ends: 776 [2022-01-31 20:08:21,630 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2391 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=549, Invalid=12561, Unknown=0, NotChecked=0, Total=13110 [2022-01-31 20:08:21,630 INFO L933 BasicCegarLoop]: 84 mSDtfsCounter, 125 mSDsluCounter, 181 mSDsCounter, 0 mSdLazyCounter, 8808 mSolverCounterSat, 193 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 9001 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 193 IncrementalHoareTripleChecker+Valid, 8808 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:21,630 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [128 Valid, 265 Invalid, 9001 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [193 Valid, 8808 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2022-01-31 20:08:21,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 776 states. [2022-01-31 20:08:22,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 776 to 675. [2022-01-31 20:08:22,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 512 states have (on average 1.021484375) internal successors, (523), 519 states have internal predecessors, (523), 133 states have call successors, (133), 30 states have call predecessors, (133), 29 states have return successors, (132), 125 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:08:22,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 788 transitions. [2022-01-31 20:08:22,766 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 788 transitions. Word has length 230 [2022-01-31 20:08:22,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:22,766 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 788 transitions. [2022-01-31 20:08:22,766 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.382978723404255) internal successors, (112), 46 states have internal predecessors, (112), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:08:22,766 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 788 transitions. [2022-01-31 20:08:22,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 20:08:22,767 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:22,767 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 12, 12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:22,767 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2022-01-31 20:08:22,767 INFO L402 AbstractCegarLoop]: === Iteration 162 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:22,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:22,768 INFO L85 PathProgramCache]: Analyzing trace with hash -1033729423, now seen corresponding path program 158 times [2022-01-31 20:08:22,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:22,768 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1382987413] [2022-01-31 20:08:22,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:22,768 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:22,773 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:22,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,496 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:24,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,498 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:08:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:08:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,499 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 44 [2022-01-31 20:08:24,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,501 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:08:24,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,502 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:08:24,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,503 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:08:24,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,504 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:08:24,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,505 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:08:24,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,506 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:08:24,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,507 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:08:24,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,508 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:08:24,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,509 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:08:24,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,510 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:08:24,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,512 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:08:24,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,513 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:08:24,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,514 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:08:24,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,515 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:08:24,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,517 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:08:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,518 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:08:24,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,520 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:08:24,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,521 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:08:24,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,522 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:08:24,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,524 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:08:24,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,525 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 20:08:24,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,526 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-31 20:08:24,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:24,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:08:24,529 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:24,529 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1382987413] [2022-01-31 20:08:24,529 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1382987413] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:24,529 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:24,529 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [46] imperfect sequences [] total 46 [2022-01-31 20:08:24,529 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035311084] [2022-01-31 20:08:24,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:24,529 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-01-31 20:08:24,529 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:24,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-01-31 20:08:24,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1977, Unknown=0, NotChecked=0, Total=2070 [2022-01-31 20:08:24,530 INFO L87 Difference]: Start difference. First operand 675 states and 788 transitions. Second operand has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 25 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-01-31 20:08:29,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:29,924 INFO L93 Difference]: Finished difference Result 723 states and 845 transitions. [2022-01-31 20:08:29,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-01-31 20:08:29,925 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 25 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) Word has length 232 [2022-01-31 20:08:29,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:29,926 INFO L225 Difference]: With dead ends: 723 [2022-01-31 20:08:29,926 INFO L226 Difference]: Without dead ends: 721 [2022-01-31 20:08:29,926 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1780 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=457, Invalid=10049, Unknown=0, NotChecked=0, Total=10506 [2022-01-31 20:08:29,927 INFO L933 BasicCegarLoop]: 67 mSDtfsCounter, 112 mSDsluCounter, 174 mSDsCounter, 0 mSdLazyCounter, 6859 mSolverCounterSat, 165 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 241 SdHoareTripleChecker+Invalid, 7024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 165 IncrementalHoareTripleChecker+Valid, 6859 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:29,927 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [115 Valid, 241 Invalid, 7024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [165 Valid, 6859 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2022-01-31 20:08:29,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2022-01-31 20:08:31,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 675. [2022-01-31 20:08:31,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 512 states have (on average 1.021484375) internal successors, (523), 519 states have internal predecessors, (523), 133 states have call successors, (133), 30 states have call predecessors, (133), 29 states have return successors, (132), 125 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:08:31,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 788 transitions. [2022-01-31 20:08:31,047 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 788 transitions. Word has length 232 [2022-01-31 20:08:31,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:31,048 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 788 transitions. [2022-01-31 20:08:31,048 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 45 states have (on average 2.422222222222222) internal successors, (109), 44 states have internal predecessors, (109), 25 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-01-31 20:08:31,048 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 788 transitions. [2022-01-31 20:08:31,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2022-01-31 20:08:31,049 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:31,049 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 19, 19, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:31,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2022-01-31 20:08:31,049 INFO L402 AbstractCegarLoop]: === Iteration 163 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:31,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:31,049 INFO L85 PathProgramCache]: Analyzing trace with hash 416966751, now seen corresponding path program 159 times [2022-01-31 20:08:31,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:31,049 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [820126222] [2022-01-31 20:08:31,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:31,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:31,055 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:31,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,619 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:32,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,620 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:08:32,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,621 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:08:32,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,622 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 58 [2022-01-31 20:08:32,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,624 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 66 [2022-01-31 20:08:32,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,625 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 74 [2022-01-31 20:08:32,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,627 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 82 [2022-01-31 20:08:32,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,628 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 90 [2022-01-31 20:08:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,629 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 98 [2022-01-31 20:08:32,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,630 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 106 [2022-01-31 20:08:32,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,631 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 114 [2022-01-31 20:08:32,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,632 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 122 [2022-01-31 20:08:32,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,633 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 130 [2022-01-31 20:08:32,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,634 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 138 [2022-01-31 20:08:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,636 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 146 [2022-01-31 20:08:32,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,637 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 154 [2022-01-31 20:08:32,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,638 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 162 [2022-01-31 20:08:32,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,639 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 170 [2022-01-31 20:08:32,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,640 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 178 [2022-01-31 20:08:32,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,641 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 186 [2022-01-31 20:08:32,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,642 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 194 [2022-01-31 20:08:32,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,644 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 202 [2022-01-31 20:08:32,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,645 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 210 [2022-01-31 20:08:32,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,646 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 218 [2022-01-31 20:08:32,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:32,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:08:32,648 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:32,648 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [820126222] [2022-01-31 20:08:32,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [820126222] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:32,648 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:32,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [51] imperfect sequences [] total 51 [2022-01-31 20:08:32,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111039920] [2022-01-31 20:08:32,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:32,648 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2022-01-31 20:08:32,648 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:32,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2022-01-31 20:08:32,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2447, Unknown=0, NotChecked=0, Total=2550 [2022-01-31 20:08:32,649 INFO L87 Difference]: Start difference. First operand 675 states and 788 transitions. Second operand has 51 states, 50 states have (on average 2.34) internal successors, (117), 49 states have internal predecessors, (117), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:08:40,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:40,209 INFO L93 Difference]: Finished difference Result 810 states and 952 transitions. [2022-01-31 20:08:40,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2022-01-31 20:08:40,210 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 50 states have (on average 2.34) internal successors, (117), 49 states have internal predecessors, (117), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) Word has length 230 [2022-01-31 20:08:40,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:40,211 INFO L225 Difference]: With dead ends: 810 [2022-01-31 20:08:40,211 INFO L226 Difference]: Without dead ends: 808 [2022-01-31 20:08:40,212 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3103 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=640, Invalid=15616, Unknown=0, NotChecked=0, Total=16256 [2022-01-31 20:08:40,218 INFO L933 BasicCegarLoop]: 103 mSDtfsCounter, 170 mSDsluCounter, 202 mSDsCounter, 0 mSdLazyCounter, 11867 mSolverCounterSat, 248 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 173 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 12115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 248 IncrementalHoareTripleChecker+Valid, 11867 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.6s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:40,218 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [173 Valid, 305 Invalid, 12115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [248 Valid, 11867 Invalid, 0 Unknown, 0 Unchecked, 3.6s Time] [2022-01-31 20:08:40,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 808 states. [2022-01-31 20:08:41,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 808 to 675. [2022-01-31 20:08:41,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 512 states have (on average 1.021484375) internal successors, (523), 519 states have internal predecessors, (523), 133 states have call successors, (133), 30 states have call predecessors, (133), 29 states have return successors, (132), 125 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:08:41,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 788 transitions. [2022-01-31 20:08:41,332 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 788 transitions. Word has length 230 [2022-01-31 20:08:41,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:41,333 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 788 transitions. [2022-01-31 20:08:41,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 50 states have (on average 2.34) internal successors, (117), 49 states have internal predecessors, (117), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24) [2022-01-31 20:08:41,333 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 788 transitions. [2022-01-31 20:08:41,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 20:08:41,334 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:41,334 INFO L514 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 22, 22, 16, 16, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:41,334 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2022-01-31 20:08:41,334 INFO L402 AbstractCegarLoop]: === Iteration 164 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:41,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:41,334 INFO L85 PathProgramCache]: Analyzing trace with hash -716063721, now seen corresponding path program 160 times [2022-01-31 20:08:41,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:41,334 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1703388235] [2022-01-31 20:08:41,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:41,335 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:41,346 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:41,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,879 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:42,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,880 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:08:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,881 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:08:42,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,882 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 52 [2022-01-31 20:08:42,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,883 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:08:42,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,884 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:08:42,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,885 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:08:42,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,886 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:08:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,887 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:08:42,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,889 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:08:42,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,890 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:08:42,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,891 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:08:42,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,892 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:08:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,893 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:08:42,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,894 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:08:42,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,895 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:08:42,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,896 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:08:42,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,897 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:08:42,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,899 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:08:42,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,900 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:08:42,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,901 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:08:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,903 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:08:42,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,904 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:08:42,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,905 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 20:08:42,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,906 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-31 20:08:42,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:42,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:08:42,909 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:42,909 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1703388235] [2022-01-31 20:08:42,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1703388235] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:42,909 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:42,909 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [49] imperfect sequences [] total 49 [2022-01-31 20:08:42,909 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816740291] [2022-01-31 20:08:42,909 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:42,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2022-01-31 20:08:42,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:42,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2022-01-31 20:08:42,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=2253, Unknown=0, NotChecked=0, Total=2352 [2022-01-31 20:08:42,910 INFO L87 Difference]: Start difference. First operand 675 states and 788 transitions. Second operand has 49 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:08:49,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:49,458 INFO L93 Difference]: Finished difference Result 779 states and 915 transitions. [2022-01-31 20:08:49,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2022-01-31 20:08:49,459 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) Word has length 232 [2022-01-31 20:08:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:49,471 INFO L225 Difference]: With dead ends: 779 [2022-01-31 20:08:49,471 INFO L226 Difference]: Without dead ends: 777 [2022-01-31 20:08:49,472 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2595 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=575, Invalid=13467, Unknown=0, NotChecked=0, Total=14042 [2022-01-31 20:08:49,472 INFO L933 BasicCegarLoop]: 89 mSDtfsCounter, 136 mSDsluCounter, 187 mSDsCounter, 0 mSdLazyCounter, 9609 mSolverCounterSat, 207 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 139 SdHoareTripleChecker+Valid, 276 SdHoareTripleChecker+Invalid, 9816 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 207 IncrementalHoareTripleChecker+Valid, 9609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:49,473 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [139 Valid, 276 Invalid, 9816 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [207 Valid, 9609 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2022-01-31 20:08:49,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 777 states. [2022-01-31 20:08:50,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 777 to 675. [2022-01-31 20:08:50,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 512 states have (on average 1.021484375) internal successors, (523), 519 states have internal predecessors, (523), 133 states have call successors, (133), 30 states have call predecessors, (133), 29 states have return successors, (132), 125 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:08:50,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 788 transitions. [2022-01-31 20:08:50,589 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 788 transitions. Word has length 232 [2022-01-31 20:08:50,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:50,589 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 788 transitions. [2022-01-31 20:08:50,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 48 states have (on average 2.375) internal successors, (114), 47 states have internal predecessors, (114), 24 states have call successors, (27), 3 states have call predecessors, (27), 1 states have return successors, (25), 23 states have call predecessors, (25), 23 states have call successors, (25) [2022-01-31 20:08:50,589 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 788 transitions. [2022-01-31 20:08:50,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2022-01-31 20:08:50,590 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:50,591 INFO L514 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 23, 23, 13, 13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:50,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2022-01-31 20:08:50,591 INFO L402 AbstractCegarLoop]: === Iteration 165 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:50,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:50,591 INFO L85 PathProgramCache]: Analyzing trace with hash 979023439, now seen corresponding path program 161 times [2022-01-31 20:08:50,591 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:50,591 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [1509221490] [2022-01-31 20:08:50,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:50,591 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:50,596 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:50,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,116 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:08:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,118 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:08:52,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,119 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:08:52,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,120 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 46 [2022-01-31 20:08:52,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,121 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 54 [2022-01-31 20:08:52,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,122 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 62 [2022-01-31 20:08:52,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,123 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 70 [2022-01-31 20:08:52,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,124 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 78 [2022-01-31 20:08:52,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,125 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 86 [2022-01-31 20:08:52,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,126 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 94 [2022-01-31 20:08:52,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,127 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 102 [2022-01-31 20:08:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 110 [2022-01-31 20:08:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,129 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 118 [2022-01-31 20:08:52,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,130 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 126 [2022-01-31 20:08:52,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,131 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 134 [2022-01-31 20:08:52,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,132 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 142 [2022-01-31 20:08:52,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,133 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 150 [2022-01-31 20:08:52,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,134 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 158 [2022-01-31 20:08:52,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,135 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 166 [2022-01-31 20:08:52,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,136 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 174 [2022-01-31 20:08:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,138 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 182 [2022-01-31 20:08:52,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,139 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 190 [2022-01-31 20:08:52,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,140 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 198 [2022-01-31 20:08:52,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,141 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 206 [2022-01-31 20:08:52,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,142 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 214 [2022-01-31 20:08:52,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,143 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 222 [2022-01-31 20:08:52,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:08:52,145 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:08:52,145 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:08:52,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [1509221490] [2022-01-31 20:08:52,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [1509221490] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:08:52,145 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:08:52,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [47] imperfect sequences [] total 47 [2022-01-31 20:08:52,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616005945] [2022-01-31 20:08:52,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:08:52,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2022-01-31 20:08:52,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:08:52,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2022-01-31 20:08:52,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=2067, Unknown=0, NotChecked=0, Total=2162 [2022-01-31 20:08:52,146 INFO L87 Difference]: Start difference. First operand 675 states and 788 transitions. Second operand has 47 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 45 states have internal predecessors, (111), 25 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-01-31 20:08:58,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2022-01-31 20:08:58,145 INFO L93 Difference]: Finished difference Result 727 states and 850 transitions. [2022-01-31 20:08:58,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-01-31 20:08:58,146 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 45 states have internal predecessors, (111), 25 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) Word has length 234 [2022-01-31 20:08:58,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2022-01-31 20:08:58,147 INFO L225 Difference]: With dead ends: 727 [2022-01-31 20:08:58,147 INFO L226 Difference]: Without dead ends: 725 [2022-01-31 20:08:58,148 INFO L932 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2075 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=503, Invalid=11269, Unknown=0, NotChecked=0, Total=11772 [2022-01-31 20:08:58,148 INFO L933 BasicCegarLoop]: 74 mSDtfsCounter, 100 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 7837 mSolverCounterSat, 163 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 254 SdHoareTripleChecker+Invalid, 8000 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 163 IncrementalHoareTripleChecker+Valid, 7837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2022-01-31 20:08:58,148 INFO L934 BasicCegarLoop]: SdHoareTripleChecker [103 Valid, 254 Invalid, 8000 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [163 Valid, 7837 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2022-01-31 20:08:58,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2022-01-31 20:08:59,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 675. [2022-01-31 20:08:59,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 675 states, 512 states have (on average 1.021484375) internal successors, (523), 519 states have internal predecessors, (523), 133 states have call successors, (133), 30 states have call predecessors, (133), 29 states have return successors, (132), 125 states have call predecessors, (132), 132 states have call successors, (132) [2022-01-31 20:08:59,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 675 states to 675 states and 788 transitions. [2022-01-31 20:08:59,386 INFO L78 Accepts]: Start accepts. Automaton has 675 states and 788 transitions. Word has length 234 [2022-01-31 20:08:59,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2022-01-31 20:08:59,386 INFO L470 AbstractCegarLoop]: Abstraction has 675 states and 788 transitions. [2022-01-31 20:08:59,386 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 46 states have (on average 2.4130434782608696) internal successors, (111), 45 states have internal predecessors, (111), 25 states have call successors, (28), 3 states have call predecessors, (28), 1 states have return successors, (26), 24 states have call predecessors, (26), 24 states have call successors, (26) [2022-01-31 20:08:59,386 INFO L276 IsEmpty]: Start isEmpty. Operand 675 states and 788 transitions. [2022-01-31 20:08:59,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2022-01-31 20:08:59,387 INFO L506 BasicCegarLoop]: Found error trace [2022-01-31 20:08:59,387 INFO L514 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 21, 21, 20, 20, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-01-31 20:08:59,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2022-01-31 20:08:59,388 INFO L402 AbstractCegarLoop]: === Iteration 166 === Targeting __VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [__VERIFIER_assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2022-01-31 20:08:59,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-01-31 20:08:59,388 INFO L85 PathProgramCache]: Analyzing trace with hash 638055357, now seen corresponding path program 162 times [2022-01-31 20:08:59,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy FIXED_PREFERENCES [2022-01-31 20:08:59,388 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModulePreferences [697314389] [2022-01-31 20:08:59,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-01-31 20:08:59,388 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-01-31 20:08:59,393 INFO L248 tedInterpolationCore]: No loops in this trace, falling back to nested interpolation [2022-01-31 20:08:59,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,567 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 0 [2022-01-31 20:09:00,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,569 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 6 [2022-01-31 20:09:00,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,570 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 11 [2022-01-31 20:09:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,571 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 60 [2022-01-31 20:09:00,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,572 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 68 [2022-01-31 20:09:00,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,573 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 76 [2022-01-31 20:09:00,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,574 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 84 [2022-01-31 20:09:00,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,575 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 92 [2022-01-31 20:09:00,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,576 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 100 [2022-01-31 20:09:00,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,577 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 108 [2022-01-31 20:09:00,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,578 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 116 [2022-01-31 20:09:00,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,579 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 124 [2022-01-31 20:09:00,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,581 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 132 [2022-01-31 20:09:00,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,594 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 140 [2022-01-31 20:09:00,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,596 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 148 [2022-01-31 20:09:00,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,597 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 156 [2022-01-31 20:09:00,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,598 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 164 [2022-01-31 20:09:00,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,599 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 172 [2022-01-31 20:09:00,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,600 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 180 [2022-01-31 20:09:00,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,601 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 188 [2022-01-31 20:09:00,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,602 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 196 [2022-01-31 20:09:00,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,603 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 204 [2022-01-31 20:09:00,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,604 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 212 [2022-01-31 20:09:00,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,606 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 220 [2022-01-31 20:09:00,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-01-31 20:09:00,607 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2022-01-31 20:09:00,607 INFO L139 FreeRefinementEngine]: Strategy FIXED_PREFERENCES found an infeasible trace [2022-01-31 20:09:00,607 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModulePreferences [697314389] [2022-01-31 20:09:00,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModulePreferences [697314389] provided 1 perfect and 0 imperfect interpolant sequences [2022-01-31 20:09:00,608 INFO L186 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-01-31 20:09:00,608 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [52] imperfect sequences [] total 52 [2022-01-31 20:09:00,608 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770039733] [2022-01-31 20:09:00,608 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-01-31 20:09:00,608 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2022-01-31 20:09:00,608 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FIXED_PREFERENCES [2022-01-31 20:09:00,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2022-01-31 20:09:00,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=2547, Unknown=0, NotChecked=0, Total=2652 [2022-01-31 20:09:00,608 INFO L87 Difference]: Start difference. First operand 675 states and 788 transitions. Second operand has 52 states, 51 states have (on average 2.3333333333333335) internal successors, (119), 50 states have internal predecessors, (119), 23 states have call successors, (26), 3 states have call predecessors, (26), 1 states have return successors, (24), 22 states have call predecessors, (24), 22 states have call successors, (24)